Sealing Systems according to API 682, 3rd Edition and ISO 21049, 1st Edition. Classification and Seal Selection.

Transcription

1 Your partner for sealing technology worldwide Applications Mechanical Seals 58 E Sealing Systems according to API 682, 3rd Edition and ISO 21049, 1st Edition. Classification and Seal Selection.

2 Table of Contents Foreword 3 Classification of Sealing Systems Classification of sealing systems - general notes 4 Categories, arrangements and seal types - overview chart 5 *) Seal configurations and flush plans 6 Seal Selection How to select the correct sealing system Seal selection 10 by seal features 11 *) Seal selection by media groups 12 Pusher seals (Type A) 13 Metal bellows seals (Type B and C) 14 Gas seals (Type A) 15 Containment seals (Type A) 16 API plans - overview 17 Basic API plans 18 Flush systems 20 Quench and buffer systems 21 Barrier systems 22 Leakage alarm and collection systems 24 Appendix API 682 tools Selection of buffer 26 and barrier fluids Seal coding 27 system 27 Objectives and category details 28 *) in profile 29 *) Fold-out pages SHV-D HRGS Gas oil pump (Ruhrpumpen) with mechanical seal type MFLWT80/95-TA3 and supply system SPA Temperature 285 C C, pressure 5 bar. 2 is a Trade Mark of Photo at front page: Statoil

3 Foreword This brochure provides basic information about ISO and API 682. It contains a set of checklists and summaries which give a brief overview that will help to select suitable sealing systems. ISO is an international standard which is based on API 682 (a standard of the American Petroleum Insti-tute). The content of these two standards is generally identical. Both standards specify requirements and recommendations for the selection and operation of shaft sealing systems in new or retrofitted centrifugal and rotary pumps. They refer to pumps which are mainly used for hazardous, flammable and/ or toxic applications in the petroleum, natural gas and chemical industries. The improvement of equipment reliability and the reduction of emissions and lifecycle costs are the major targets of these standards. The following table summarizes the history of API 682/ ISO and the pump standards API 610/ ISO 13709: Year Pump specification Mechanical seal specification Note 2004 API 610, 10th edition API 682, 3rd edition Same wording and structure as in the ISO documents - ISO Enhancements to API 682, 2nd edition 2003 ISO Enhancements to API 610, 9th edition 2002 API 610, 9th edition API 682, 2nd edition Seal chambers in API 610, new seal coding system in API API 610, 8th edition - References API 682 1st edition API 682, 1st edition First stand alone API seal standard Revised seal coding system The API 682 task force of the American Petroleum Institute is the author of 1990 API 610, 7th edition API ISO has been created Contains by the basic technical seal committees specificationiso/tc 115, SC3 and ISO/TC 67, SC6. Defines seal coding system The checklists, summaries and API plans are based on both standards. For further and more detailed information please refer to the commercially available documents of API 682 3rd edition and ISO CGSH 3

4 Classification of Sealing Systems API 682 and ISO specify a range of different sealing systems. Parameters such as category, arrangement, configuration, type and API plans are to be considered. The chart overleaf is a quick overview about the basic features of the different categories, arrangements and seal types. It also shows the links between these parameters and marks default and optional selections. Step I: The category determines the applicable seal chamber, basic seal design features, maximum operating conditions, testing and data requirements. Each category has special demands regarding the seal arrangement, configuration and type. There are three different categories. Step II: Determines the arrangement of the mechanical seal cartridges and their possible configurations. The configuration determines the sealing method, orientation of the mechanical seal components, the use of containment seals and the required API plans. API 682 and ISO specify six default configurations and five optional configurations. Each of these configurations can be realized with different seal types..mflwt80 The universal primary seal for both hot and cold applications in refineries. Step Ill: Definition of the seal type, the design and material of the spring element and the secondary seals. It defines the appropriate operating limits. API 682 and ISO specify three basic seal types, a fourth option is a totally engineered sealing system (ES). Step IV: Completes the sealing system classification by selecting the required API plan. API 682 and ISO introduce a seal code which contains information about the category, arrangement, type and API plan. For further details please refer to page 27. mechanical seal type MFLWT80S3/90-TA1 and supply system SPA 3020/A22 according to API plan in residue pumps (Byron Jackson). Temperature 332 C, pressure.8.5 bar Residue pumps (Ruhrpumpen) with MFLW80-D1/70 and SPA3020/A22. Operation according to API plan Temperature 375 C, pressure.3 bar 4

5 Categories, Arrangements and Seal Types Step I Category (see page 28) Category 1 Category 2 Category 3 ISO 3069 type C, ASME B73.1, ASME B73.2 ISO / API th edition -40 C 260 C, 21 bar g (-40 F 500 F, 300 PSI) -40 C 400 C, 41 bar g (-40 F 750 F, 600 PSI) Minimal data requirements Rigorous data requirements Step II Arrangement and configuration Arrangement 1 Single seal cartridge Arrangement 2 Dual seal cartridge - pressure between seals less than seal chamber pressure - internal reverse balance feature - fixed carbon throttle bushing Arrangement 3 Dual seal cartridge - pressure between seals higher than seal chamber pressure - internal reverse balance feature - fixed carbon throttle bushing 1CW-FX Contacting Wet - FiXed throttle bushing Category 1: carbon throttle bushing Category 2: non-sparking metal throttle bushing Category 3: not applicable 1CW-FL Contacting Wet - FLoating throttle bushing Category 3: carbon throttle bushing Category 1 and 2: carbon throttle bushing 2CW-CW Contacting Wet - Contacting Wet 2CW-CS Contacting Wet - Containment Seal (non-contacting or contacting CS) 2NC-CS Non-Contacting - Containment Seal (non-contacting or contacting CS) 3CW-FB Contacting Wet - Face-to-Back 3CW-BB Contacting Wet - Back-to-Back 3CW-FF Contacting Wet - Face-to-Face 3NC-BB Non-Contacting - Back-to-Back 3NC-FF Non-Contacting - Face-to-Face 3NC-FB Non-Contacting - Face-to-Back Step III Type and spring position Type A Pusher seal Temperature: -40 to 176 C (-40 to 350 F) Pressure: 41 bar g (600 PSI) Multiple springs: Alloy C-276 Single spring: SS 316 O-rings: FKM or FFKM NBR, HNBR, EPM, EPDM, TFE Type B Flexible element Rotary springs Seal face surface speed < 23 m/s Stationary springs Seal face surface speed > 23 m/s Rotary bellows Metal bellows seal with O-rings Temperature: -40 to 176 C (-40 to 350 F) Stationary bellows Pressure: 21 bar g (300 PSI) Metal bellows: Alloy C-276 O-rings: FKM or FFKM NBR, HNBR, EPM, EPDM, TFE Type C Rotary bellows Metal bellows seal with flexible graphite Temperature: -40 to 400 C (-40 to 750 F) Stationary bellows Pressure: 21 bar g (300 PSI) Metal bellows: Alloy 718 Sealing element: flexible graphite Totally Engineered Sealing system (ES) For service conditions outside the operating limits of type A, B and C Temperature: < -40 or > 260 C (< -40 or > 500 F) category 1 < -40 or > 400 C (< -40 or > 750 F) category 2 and 3 Pressure: > 21 bar g (300 PSI) category 1 > 41 bar g (600 PSI) category 2 and 3 Surface speed: > 23 m/s (75 ft/s) Shaft diameter: below 20 mm (0.75 inch) or above 110 mm (4.3 inch) Medium: highly corrosive fluids for which the specified materials in API 682/ISO are not suitable, fluids with absolute vapour pressures > 34 bar a (493 PSI), unstable liquid properties (e.g. multiphase, non-newtonian), high viscosity or pour point above or within 20 C (68 F) of the minimum ambient temperature. Default Optional Optional configurations configurations design feature 5

6 Arrangement 1 Single Seal Configurations and API Plans Process side Atmospheric side Plan 11 Recirculation from discharge to seal chamber 1CW-FX Contacting Wet - FiXed throttle bushing Example: MFL85N (type B) F D Q Plan 61 Plugged connections plugged Plan 13 Recirculation from seal chamber to suction Plan 62 External quench Quench 1CW-FL Contacting Wet - FLoating throttle bushing F D Q drain Plan 23 Internal recirculation through a cooler TI Each configuration is available for seal types A, B and C Plan 65 Leakage control by float type level switch Plan 31 Recirculation from discharge through a cyclone separator to seal chamber LSH drain H75 Plan 32 External flush into the seal chamber Option EB Client PI FI TI Default configurations Optional configurations 6

7 Arrangement 2 Dual Seal Configurations and API Plans Pressure between seals less than seal chamber pressure Process side Between seals Plan 11 Recirculation from discharge to seal chamber 2CW-CW F Contacting Wet Contacting Wet Example: H75VK-H75P (type A) LBO LBI Plan 52 Unpressurized buffer fluid system flare PI PSH filling LI LSH LSL if specified Plan 13 Recirculation from seal chamber to suction 2CW-CS Contacting Wet Containment Seal Example: H75VK-CGSH (type A) if specified FSH M FE PSL PI PCV F I L EB Client Plan 32 External flush into the seal chamber Option EB Client FI PI TI Plan 72 Buffer gas system Each configuration is available for seal types A, B and C Plan 75 Condensate recovery for condensing leakage flare PI PSH LI LSH if specified drain Plan 14 Recirculation from seal chamber to suction and circulation from discharge to seal chamber 2NC-CS Non-Contacting Containment Seal Example: CGSH-CGSH (type A) Plan 76 Vapour recovery system for noncondensing leakage PSH flare PI drain Default configurations Optional configurations 7

8 Arrangement 3 Dual Seal Configurations and API Plans Barrier fluid pressure higher than seal chamber pressure Process side Between seals Plan 02 Dead end (plugged connections) 3CW-FB Contacting Wet Face-to-Back Example: H75VK-H75P (type A) Plan 53A Barrier fluid reservoir N2 PI PSL filling LI LSH LSL if specified Plan 11 Recirculation from discharge to seal chamber 3CW-BB Contacting Wet Back-to-Back Example: H75VKP-D (type A) Plan 53B Barrier fluid bladder accumulator system vent PI PSL filling TI if specified Plan 13 Recirculation from seal chamber to suction 3CW-FF Contacting Wet Face-to-Face Example: SHVP-D (type A or engineered seal ES) Plan 53C Barrier fluid piston accumulator system Plan 14 Recirculation from seal chamber to suction and circulation from discharge to seal chamber SHV-D Plan 54 External barrier fluid system Each configuration is available for seal types A, B and C Default configurations Optional configurations 8

9 Arrangement 3 Dual Seal Configurations and API Plans Barrier gas pressure higher than seal chamber pressure Process side Between seals Plan 02 Dead end (plugged connections) 3NC-BB Non-Contacting Back-to-Back Example: CGSH-KD (type A) Plan 74 Pressurized barrier gas EB Client if specified PSL PI FSH M FE PCV F I L 3NC-FF Non-Contacting Face-to-Face Example: RGS-D (type A) 3NC-FB Non-Contacting Face-to-Back Example: HRGS-DD (type A) CGSH seal face Default configurations Optional configurations 9

10 How to select the correct Sealing System This chapter is dedicated to find the correct Sealing System according to.api 682 / ISO standard Before beginning with the seal selection, some general information: API 682 and ISO specify defaults ( ) and options ( ) for several design details and the selection of the seal materials. The options are only permitted with the approval of the customer. Therefore typical seal codes always assume all standard defaults. The standards do not intend to prevent a vendor from offering or the customer from requesting alternative equipment or engineered products for special applications. This may be particulary appropriate where there are options, innovative or developing designs or materials. Further information shall be provided by the vendor if an option or any variations to this standard are offered. How to select the sealing system The tables on page 11 and 12 describe two different ways to select the seal needed for a specific API-application. Seal selection by seal features The table on page 11 is used after the arrangement, configuration and seal type is defined. The table is structured in the same way as the API scheme on page 5. Going from left to right, the same three steps have to be made as described on page 4: by choosing the arrangement, configuration and type required. In the column Flexible Element you can see if rotary or stationary is the default or option. The Mechanical Seal column on the right lists the recommended seal type. Further down the page tables for some optional configurations, recommended API plans and a range of Supply Systems can be found. Seal selection by media groups API 682 and ISO define different media groups and typical service conditions. The tables on page 12 list recommendations for suitable sealing systems. Some of them include optional configurations. Specific applications may allow or require other seal arrangements and different API plans. Please contact us for further information. In the upper table the seal selection for standard seal types can be found. The table below is dedicated to optional seals. mechanical seal MFLW85S20/75-TA1 used in pumps (Ruhrpumpen) to seal gas oil with sulphur. Temperature 217 C, pressure 2.3 bar. 10

11 Sealing systems selection by seal features Arrangement Default configuration Type Flexible element mechanical seals Contacting Wet seal Rotary springs H75VN A with a FiXed throttle bushing Stationary springs SH applicable API plans (process side): Rotary bellows MFL85N 1CW-FX B 01, 02, 11, 12, 13, 14, 21, 23, 31, 32, 41 Stationary bellows applicable API plans (atmospheric side): Rotary bellows MFLWT80 Single seal 51 / 61, 62, 65 C Stationary bellows MFL65 1 cartridge Contacting Wet seal Rotary springs H75VN A with a FLoating throttle bushing Stationary springs SH applicable API plans (process side): Rotary bellows MFL85N 1CW-FL B 01, 02, 11, 12, 13, 14, 21, 23, 31, 32, 41 Stationary bellows applicable API plans (atmospheric side): Rotary bellows MFLWT80 51 / 61, 62, 65 C Stationary bellows MFL65 Contacting Wet seals Rotary springs H75VK / H75P A applicable API plans (process side): Stationary springs SH / SHP 2CW-CW 01, 02, 11, 12, 13, 14, 21, 23, 31, 32, 41 Rotary bellows MFL85 / MFL85P B Dual seal (tandem) applicable API plans (between seals): Stationary bellows cartridge 51, 52 Rotary bellows MFLWT80 / MFL85P C Stationary bellows MFL65 / MFL85P 2 Operated with Contacting Wet inner seal Rotary springs H75VK / CGSH (EagleEM300) A unpressurized buffer with a Containment Seal Stationary springs SH / CGSH (EagleEM300) medium 2CW-CS applicable API plans (process side): Rotary bellows MFL85 / CGSH (EagleEM300) (tandem) 01, 02, 11, 12, 13, 14, 21, 23, 31, 32, 41 B Stationary bellows applicable API plans (between seals): Rotary bellows MFLWT80 / CGSH (EagleEM300) 71, 72, 75, 76 C Stationary bellows MFL65 / CGSH (EagleEM300) Contacting Wet seals Rotary springs H75VK / H75P A in Face-to-Back arrangement Stationary springs SH / SHP 3CW-FB applicable API plans (process side): Rotary bellows MFL90 / MFL85P B Dual seal (tandem) 01, 02, 11, 12, 13, 14, 32 Stationary bellows cartridge applicable API plans (between seals): Rotary bellows MFLWT90 / MFL85P 53A, 53B, 53C, 54 C Stationary bellows MFL65 / MFL85P 3 Operated with Non-Contacting seals Rotary springs CGSH-KD A pressurized barrier in Back-to-Back arrangement Stationary springs HRGS-DC medium applicable API plans (process side): Rotary bellows 3NC-BB B 01, 02, 11, 12, 13, 14, 32 Stationary bellows applicable API plans (between seals): 74 On request Rotary bellows C Stationary bellows Example: Seal selection by seal features: see table above, Arrangement 1 4 1CW-FL 4 Type A 4 Rotary springs 4 H75VN Arrangement Most common optional configurations Type Flexible element mechanical seals 2 See above 2NC-CS (tandem) Non-Contacting inner seal with a Containment Seal A Rotary springs CGSH / CGSH 3 See above 3CW-BB Contacting Wet seals in Back-to-Back arrangement A Rotary springs H75VKP-D 3NC-FB (tandem) Non-Contacting seals in Face-to-Back arrangement A Stationary springs HRGS-DD 11 Default configurations Optional configurations Operation mode API plan Description supply system 21/22 Circulation from pump discharge through cooler to seal WE, WEL Primary flush 23 Circulation of liquid from seal chamber through cooler to seal WE, WEL 31 (41) Circulation from discharge through cyclone separator to seal ZY, (ZY + WE / WEL) 32 Injection of clean liquid into seal chamber SP24 51 External reservoir provides static liquid quench QFT Quench/buffer 52 External reservoir provides circulation buffer liquid TS systems 62 External source provides flowing quench liquid SP24 72 Gas buffer system GSS 53A Barrier liquid system with reservoir TS 53B Barrier liquid system with bladder accumulator SPO Barrier systems 53C Barrier liquid system with fluid piston accumulator SPO 54 Barrier liquid system from external source SPA Leakage collection/alarm 74 Barrier gas system GSS 65 Recovery system with level control for liquid leakage LS 75 Recovery system for condensing leakage LS 76 Recovery system for non-condensing leakage SP23

12 Seal Selection by Media Groups Standard seal type Temperature C ( F) Pressure bar g (PSI) Mechanical seal Supply system Type Arr. 1) API plan 2) recommendation 1) recommendation 2) Non-hydrocarbons Non-flashing hydrocarbons Flashing hydrocarbons Water < 80 (180) < 21 (300) ( ) 1 H75VN 11 > 80 (180) < 41 (600) 1 H75VP 23 WE < 21 (300) Sour water 2 H75VK / H75P 52 TS ( ) A < 21 (300) Caustic, amines, crystallize 1 H75VN 62 SP24 < 80 (180) ( ) H 2 SO 4 (max. 20% at 25 C) < 21 (300) 3 H75VK / H75P 53A TS H 3 P0 4 (max. 20% at 80 C) All other acids ES 3 Engineered seal note 3) < 21 (300) 53A TS (-40 20) ( ) 53B or C SPO A H75VK / H75P < 21 (300) 53A TS Absolute vapour pressure (20 350) ( ) 53B or C SPO less than 1 bar < 21 (300) C MFLWT90 / MFL85P 02+53A TS at pumping temperature ( ) ( ) ES MFLWT90 / H75P 02+53C SPO < 21 (300) C MFLWT90 / MFL85P 02+53A TS ( ) ( ) ES MFLWT90 / H75P 02+53C SPO < 21 (300) 53A TS (-40 20) ( ) 53B or C SPO A H75VK / H75P < 21 (300) 53A TS Absolute vapour pressure (20 350) ( ) 53B or C SPO above 1 bar < 21 (300) C MFLWT90 / MFL85P 02+53A TS at pumping temperature ( ) ( ) ES MFLWT90 / H75P 02+53C SPO < 21 (300) C MFLWT90 / MFL85P 02+53A TS ( ) ( ) ES MFLWT90 / H75P 02+53C SPO Example: Seal selection by medium: see table above Non-hydrocarbon 4 Water 4 < 80 C 4 21 bar (g) 4 Type A 4 Arrangement 1 4 H75VN Plan 11 Optional seal type when specified Temperature C ( F) Pressure bar g (PSI) Mechanical seal Type Arr. 1) API plan 2) recommendation 1) recommendation 2) Supply system 12 Non-hydrocarbons Non-flashing hydrocarbons Flashing hydrocarbons Water < 21 (300) B or C 1 MFL85N or MFL65 < 80 (180) ( ) ES 1 SHV > 80 (180) < 41 (600) 11 < 21 (300) B or C 1 MFL85N or MFL65 Sour water ( ) ES 1 SHV SP24 < 21 (300) B or C 1 MFL85N or MFL65 Caustic, amines, crystallize 62 < 80 (180) ( ) ES 1 SHV H 2 SO 4 (max. 20% at 25 C) MFL90 / MFL85P < 21 (300) B or C 3 53A TS H 3 P0 4 (max. 20% at 80 C) or MFL65 / MFL85P All other acids ES 3 Engineered seal note 3) < 21 (300) MFL90 / MFL85P or B or C 3 53A TS MFL65 / MFL85P (-40 20) ( ) ES 3 SHPV-D 53B SPO < 21 (300) MFL90 / MFL85P Absolute vapour pressure B or C A TS or MFL65 / MFL85P less than 1 bar (20 350) SHPV-D 53B SPO at pumping temperature ( ) < 21 (300) ES ES 3 3 ( ) ( ) < 21 (300) ES 3 ( ) ( ) Engineered seal note 3) < 21 (300) 53A TS (-40 20) ( ) 53C SPO SHPV-D < 21 (300) 02+53A TS Absolute vapour pressure (20 350) ( ) ES 02+53C SPO above 1 bar < 21 (300) MFL65 / MFL85P 02+53A TS at pumping temperature ( ) ( ) MFL65 / SHPV 02+53C SPO < 21 (300) MFL65 / MFL85P 02+53A TS ( ) ( ) MFL65 / SHPV 02+53C SPO 1).A specific application may allow another seal arrangement. Please contact for further information 2).A specific application may allow additional or different API plans. Please contact for further information 3).The seal type and the API plan(s) are dependant on the specific operation conditions

13 Pusher Seals Type A H75VN Operating limits p 1 (max) = 41 bar g t 1 = C v g (max) = 23 m/s (600 PSI) ( F) (75 ft/s) Materials *) Face: Carbon (A), SiC (Q1, Q2) Seat: SiC (Q1, Q2) O-rings: FKM, FFKM, EPDM, NBR, HNBR Springs: Alloy C-276 **) Other parts: SS316 (1.4571) H75VP With pumping ring. Operating limits and materials *) see H75VN H75VK With reverse pressure feature. Operating limits and materials *) see H75VN SHV With reverse pressure feature, stationary springs. Operating limits p 1 (max) = bar g (600 2,115 PSI) t 1 = C ( F) v g (max) = m/s ( ft/s) Materials *) Face: Carbon (A), SiC (Q1, Q2), Seat: SiC (Q1, Q2) O-rings: FKM, FFKM, EPDM, NBR, HNBR Springs: Alloy C-276 **) Other parts: SS316 (1.4571) Operating limits refer to default seal face combination Carbon/SIC *) Default and optional materials available..in C-4 available, recommendation (** H75 13

14 Metal Bellows Seals Type B and C MFL85N/90N MFL85P MFL85N for arrangement 1 and 2 (external pressurization) MFL90N for arrangement 3 (internal pressurization) Operating limits p 1 (max) = 25 bar g / 23 bar g (363 PSI / 334 PSI) t 1 = C ( F) v g (max) = 23 m/s (75 ft/s) Materials *) Face: Carbon (A), SiC (Q1, Q2), Seat: SiC (Q1, Q2) O-rings: FKM, FFKM, EPDM, NBR, HNBR, Other parts: SS316 (1.4571) Bellows: Alloy C-276 (in Alloy 718 available, recommendation) With pumping ring. Operating limits and materials *) see MFL85/90N MFL65 MFLWT80/90 With stationary bellows. Operating limits p 1 (max) = 25 bar g (363 PSI) t 1 = C ( F) v g (max) = 50 m/s (164 ft/s) Materials *) Face: Carbon (A), SiC (Q1, Q2), Seat: SiC (Q1, Q2) O-rings: Flexible graphite Bellows: Alloy 718 Other parts: SS316 (1.4571), Ni42 (1.3917) With rotary bellows. MFLWT80 for arr. 1 and 2 (ext. press.), MFLWT90 for arr. 3 (internal pressurization). Operating limits p 1 (max) = 25 bar g / 23 bar g (363 PSI / 334 PSI) t 1 = C ( F) For temperatures below -20 C (-4 F) MFLCT 80/92 v g (max) = 23 m/s (75 ft/s) Materials *) Face: Carbon (A), SiC (Q1, Q2), Seat: SiC (Q1, Q2) O-rings: Flexible graphite, Bellows: Alloy 718 Other parts: SS316 (1.4571), Ni42 (1.3917) Operating limits refer to default seal face combination Carbon/SIC. *) Default and optional materials available. 14 MFL 85

15 Gas Seals Type A mechanical seal type MFL65S2/125-TA1 in Byron Jackson pump to seal vacuum gas oil. Temperature: 260 C, pressure 12 bar. Quench oil pump (Ruhrpumpen) with gas-lubricated RGS-D1/143 and GSS buffer. gas supply system p 1 = 1 bar; t 1 = +191 C C; n = 1,500 min 1 ; medium: quenching oil with 3 % solid content. CGSH-KD 3NC-BB Operating limits p 1 (max) = 25 bar g t 1 = C v g (max) = 23 m/s (363 PSI) ( F) (75 ft/s) Materials *) Face: Carbon (A), SiC (Q1, Q2) Seat: SiC (Q1, Q2) O-rings: FKM, FFKM, EPDM, NBR, HNBR Springs: Alloy C-276 **) Other parts: SS316 (1.4571) HRGS-DC 3NC-BB Operating limits p 1 (max) = 25 bar g t 1 = C v g (max) = 23 m/s (363 PSI) ( F) (75 ft/s) Materials *) Face: Carbon (A), SiC (Q1, Q2) Seat: SiC (Q1, Q2) O-rings: FKM, FFKM, EPDM, NBR, HNBR Springs: Alloy C-276 **) Other parts: SS316 (1.4571) CGSH HRGS-DD 3NC-FB Operating limits p 1 (max) = 41 bar g t 1 = C v g (max) = 23 m/s (600 PSI) ( F) (75 ft/s) Materials *) Face: Carbon (A), SiC (Q1, Q2) Seat: SiC (Q1, Q2) O-rings: FKM, FFKM, EPDM, NBR, HNBR Springs: Alloy C-276 **) Other parts: SS316 (1.4571) Operating limits refer to default seal face combination Carbon/SIC.. Default and optional materials available (*.in C-4 available, recommendation (** 15

16 Containment Seals Type A A containment seal is a safety seal. In case of primary seal failure it shall operate for a minimum of 8 hours at seal chamber conditions. It can be found in the default configuration 2CW-CS and the optional configuration 2NC-CS Containment seals can be of non-contacting or contacting kind. Non-contacting containment seals feature aerodynamic grooves which provide a reliable lift-off of the seal faces even at low velocities. Contacting containment seals are used in connection with liquid buffer systems but may also be used as dry running seal in connection with a Nitrogen purge. CGSH CS Non-contacting containment seal Operating limits p 1 (max) = 25 bar g t 1 = C v g (max) = 23 m/s (363 PSI) ( F) (75 ft/s) EagleEM300 CS Contacting containment seal Materials Face: Carbon (A), SiC (Q1, Q2) Seat: SiC (Q1, Q2) O-rings: FKM, FFKM, EPDM, NBR, HNBR Springs: Alloy C-276 **) Other parts: SS316 (1.4571) Operating limits p 1 (max) = 2 bar g t 1 = C v g (max) = 23 m/s (29 PSI), dry operation ( F) (75 ft/s) In the event of primary seal failure the EM300 will work as a conventional wet lubricated seal in pressures up to 60 bar g (870 PSI) for at least 8 hours. Materials Face: Special carbon Seat: Pressureless sintered SiC O-rings: FKM, FFKM, EPDM, FVMQ Springs: Alloy C-276 Other parts: SS316.in C-4 available, recommendation (** 16

17 API Plans Overview An API plan determines the piping or auxiliary system which is connected to the seal chamber or/and the mechanical seal cartridge. Certain seal configurations only work in combination with appropriate API plans. Other API plans can also be applied to improve the performance of a mechanical seal. The combination of external control and supply units which are used to realize a certain API plan is usually called a Supply System. Statoil MFL 65 Gas oil charge feed pump sealed with MFL65 and HSHF1 in tandem arrangement. Temperature 280 C, pressure 3.5 to 15 bar. 17

18 API Plans Process Side For general applications. Product pumped is clean, good lubrication properties and heat removal from the mechanical seal. Internal circulation from the pump discharge to the seal. Plan 01 Seal chamber cooling and neck bush are necessary, unless otherwise specified. Dead end seal chamber with no circulation. Plugged connections for possible future circulation and quench. Plan 02 Used when the product being pumped has occasional particles only. Recirculation from pump discharge through a strainer and flow control orifice to the seal. Plan 11 (12) Plan 12: With strainer St St Used where the seal chamber pressure is at discharge pressure (mainly vertical pumps). Recirculation from seal chamber through a flow control orifice and back to pump suction Plan 13 18

19 API Plans Process Side Used where cooling flow is supplied to seal while providing venting of seal chamber (generally used for vertical pumps). Recirculation from pump discharge through a flow control orifice to the seal and simultaneously from the seal chamber through a control orifice to pump suction. Plan 14 Used for hot applications or where the temperature and pressure in the seal chamber is close to the vapour curve of the product. Recirculation from pump discharge through a flow control orifice and cooler into the seal chamber. Used for hot liquid applications or where the temperature and pressure in the seal chamber is close to the vapour curve of the product. Recirculation by means of a pumping ring in seal chamber through a cooler and back to seal chamber. Plan 22 (21) Plan 23 Plan 21: Without strainer St St (reference (Plan 12 / 21 / 22 / 23 / 31 / 41 Water cooler WE6045/M014-D0 (SS316L, 45/16 bar, 125 C, BW 1/2 600 lbs) WE6045/M015-D0 (SS316L, 45/16 bar, 125 C, BW 3/4 600 lbs) WE6045/M016-D0 (SS316L, 45/16 bar, 125 C, 1/2 NPTF) WE6045/M017-D0 (SS316L, 45/16 bar, 125 C, 3/4 NPTF) WE6045/A001 (316 L, 45/16 bar, 125 C, SW 3/4 600 lbs) alternative WE6045/A002 (316 L, 45/16 bar, 125 C, SW 1/2 600 lbs Air fin cooler WEL1000/A067 (3/4 NPTF, 110 bar, 200 C, SS316, 2 tubes) WEL1000/A068 (3/4 NPTF, 110 bar, 200 C, SS316, 4 tubes) WEL1000/A069 (3/4 NPTF, 110 bar, 200 C, SS316, 6 tubes) WEL1000/A070 (flange 3/4 600 lbs, 50 bar, 200 C, SS316, 2 tubes) WEL1000/A070 (flange 3/4 600 lbs, 50 bar, 200 C, SS316, 4 tubes) WEL1000/A070 (flange 3/4 600 lbs, 50 bar, 200 C, SS316, 6 tubes) Temperature measuring unit SP D0 (3/4 NPT, dia. 100, C, threaded thermowell) SP D0 (flange 3/4, 600 lbs RF, dia. 100, C, threaded thermowell) SP D0 (flange 3/4, 600 lbs RF, dia. 100, C, flanged thermowell) Used in applications with suspended solids where the SG of the particles is 2x that of the liquid. Recirculation from pump discharge through a cyclone separator, clean fluid to seal chamber, dirty fluid to suction. Plan 31 Orifice SP D0 (3/4 NPT, bore dia. 3 mm) SP D0 (flange 3/4, 600 lbs, RF, bore dia. 3 mm) Strainer SP D0 (3/4 NPT) SP D0 (flange 3/4 ) Cyclone separator ZY62/1/2 NPT-00 (SS316, 64 bar, 125 C, 1/2 NPT) ZY62S2/NW21-D0 (SS316, 64 bar, 125 C, WN 1/2 600 lbs) ZY203/3/4NPT-00 (SS316, 200 bar, 3/4 NPT) ZY203/NW20-D0 (SS316, 80 bar, 150 C, WN 3/ lbs) 19

20 API Plans Process Side Used when the product being pumped does not have good lubrication properties, contains suspended solids or is hazardous. Flush injecton of clean fluid into the seal chamber from an external source. Plan 32 reference (Plan 32) Flush unit SP D0 (16 bar, 2 20 l/min water, SS (316 Used in applications with suspended solids where the SG of the particles is 2 x that of the liquid. Temperature and pressure in the seal chamber is close to the vapour pressure of the product. Recirculation from pump discharge through a cyclone separator, delivering clean fluid to a cooler and then to the seal chamber. Plan 41 ZY203 cyclone separator 20

21 API Plans Between seals GSS buffer gas panel Used with products that usually solidify when coming into contact with air / ambient temperature. External reservoir providing a deadended blanket for fluid to the quench connection of the gland. Plan 51 reference (Plan 51) Quench fluid tank QFT6000/M001-DO (3 liter, 80 C, SS (316 Used where the pumped product is harmful / hazardous and / or buffer fluid may not contaminate the product. External reservoir at pressure below seal chamber pressure. Pumping device providing buffer liquid forced circulation. Plan 52 (reference (Plan 52 Thermosiphon system for shaft diameter = < 60 mm TS6000/M052-D0 (12 liter, ASME, NPT-connection) TS6001/M052-D0 (12 liter, PED, NPT-connection) TS6000/M001-D0 (12 liter, ASME, Flange-connection) TS6001/M001-D0 (12 liter, PED, Flange-connection) Thermosiphon system for shaft diameter = 60 mm TS6002/M052-D0 (20 liter, ASME, NPT-connection) TS6003/M052-D0 (20 liter, PED, NPT-connection) TS6002/M004-D0 (20 liter, ASME, Flange-connection) TS6003/M003-D0 (20 liter, PED, Flange-connection) < 21

22 API Plans Between seals Used for hot applications or where products have low pressure and are harmful/ hazardous. External reservoir pressurized above seal chamber pressure providing barrier fluid to mechanical seals. Pumpng device providing forced circulation. Plan 53A A (reference (Plan 53A Thermosiphon system for shaft dia. = < 60 mm TS6000/M053-D0 (12 liter, ASME, NPT-connection) TS6001/M053-D0 (12 liter, PED, NPT-connection) TS6000/M002-D0 (12 liter, ASME, Flange-connection) TS6001/M002-D0 (12 liter, PED, Flange-connection) Thermosiphon system for shaft dia. = 60 mm TS6002/M053-D0 (20 liter, ASME, NPT-connection) TS6003/M053-D0 (20 liter, PED, NPT-connection) TS6002/M005-D0 (20 liter, ASME, Flange-connection) TS6003/M004-D0 (20 liter, PED, Flange-connection) < Used for applications where products have high pressure and are harmful/hazardous. Pre-pressurized bladder accumulator provides pressure to circulation system. Heat removed by air/ water heat exchanger. Pumping device providing forced circulation. Plan 53B (reference (Plan 53B Bladder accumulator system with air fin cooler SPO9050/M001-D0 (20 liter, PED, NPT-connection, 50 bar) SPO9050/M031-D0 (20 liter, PED, Flange-connection, 50 bar) SPO9050/M032-D0 (20 liter, ASME, Flange-connection, 50 bar) SPO9050/M036-D0 (20 liter, ASME, NPT-connection, 50 bar) Alternative with water cooler WE 6045/M... Used for applications where products have high pressure and are harmful/hazardous. Pressurization by reference line from seal chamber to a piston accumulator provides pressurized barrier fluid. Pumping device providing forced circulation. Plan 53C (reference (Plan 53C Piston accumulator system with air fin cooler SPO9050/M002-D0 (50 bar, 2 liter, NPT-connection, PED) SPO9050/M033-D0 (50 bar, 2 liter, NPT-connection, ASME) SPO9050/M034-D0 (50 bar, 2 liter, Flange-connection, ASME) SPO9050/M035-D0 (50 bar, 2 liter, Flange-connection, PED) Alternative with water cooler WE 6045/M... A N 2 Used in harmful/ hazardous applications. Pressurized clean barrier fluid from an external system. Fluid circulation by an external pump or pressure system. Plan 54 (reference (Plan 54 Barrier liquid SPA TS 6000 thermosiphon system 22

23 API Plans Between seals Applicable with hydrocarbons normally used in conjunction with plan 75 or plan 76. Externally supplied gas buffer (pressure lower than seal chamber pressure). Buffer gas may be used to dilute seal leakage. Plan 72 (71) Plan 71: Plugged connections A B C (reference (Plan 72 Buffer gas panel GSS4000/A001-D0 (EExd, 16 bar, Nl/min N 2 ) (built into box) GSS4000/A002-D0 (EExd, 16 bar, Nl/min N 2 ) A connect to plan 75 B connect to plan 76 C N 2 D quench connection to be located downwards Used in applications where the product is harmful/hazardous. Externally supplied barrier gas used to positively prevent process fluid from leaking to atmosphere. Pressure of barrier gas higher than seal chamber pressure. Plan 74 A (Reference (Plan 74 Barrier gas panel GSS4016/A324-D0 (EExi, 16 bar, 50 C, Nl/min N 2 ) GSS4016/A326-D0 (EExd, 16 bar, 50 C, Nl/min N 2 ) A N 2 Application when pump fluid condenses at ambient temperatures. Containment seal chamber drain for condensing leakage. Plan 75 A C (reference (Plan 75 Leakage collecting system LS050/M001-D0 (50 bar, 120 C, 14 liter, ASME, NPT-connection) B Application where pump fluid does not condense at ambient temperature. Containment seal chamber vent for noncondensing leakage. Plan 76 C (reference (Plan 76 Vapour recovery system SP D0 (50 bar, 80 C, Pl dia. 100 mm, Pressure switch EExi) A B C Device to be located below pump shaft To drain To flare 23

24 API Plans Atmospheric side Used to keep atmospheric side of seal clean. External source providing a flow-through quench at atmospheric side. Plan 62 (61) Plan 61: Plugged Quench connection (reference (Plan 62 External water quench system SP D0 (16 bar, 2 20l/min water, SS 316) Steam quench Atmosheric side D Used for leakage detection on single seal. Atmospheric side leakage collection and monitoring (alarm high) in external vessel. Plan 65 A reference (Plan 65) Leakage detection system LS050/M002-D0 (EExi, NPT-connection) B 53B SPO bladder accumulator system 24

25 Appendix The following tables give a quick overview about the requirements of the different categories, the selection of suitable buffer or barrier fluids and the seal coding system according to API 682 / ISO and the seal c ode. mechanical seal MFLW85S20 in pump (Thyssen Ruhrpumpen) to seal gas oil with sulphur. Temperature, 217 C.pressure 2.3 bar 25

26 API 682 tools Seal Selection Program according to API 682 3rd edition and ISO A valuable aid for selecting mechanical seals acc. to API 682 3rd edition. The software on this CD-ROM provides a step-by-step guide to selecting the appropriate sealing system for any API related application. While doing so, it follows the seal selection procedure as it is intended by the API 682 3rd edition. API 682 Poster: API 682 at a glance: Double sided printing shows the most common API plans on one side and overleaf illustrates the seal classification system acc. to API 682 Size: DIN A 1 (594 x 841 mm). API 682 Short guide: This handy booklet provides valuable hands-on operational information, API plan descriptions, start-up and shut-down procedures, recommendations for regular inspection and troubleshooting for the most common API plans. 26

27 Selection of Buffer and Barrier Mediums Seal Coding System Sealed fluid Barrier/buffer fluid Special notes General demands Above 10 C Below 10 C Aqueous streams Hydrocarbon streams Hydrocarbon fluid Mixture of water and ethylene glycol Mixture of water and propylene glycol 100 mm 2 /s at 38 C and 1 mm 2 /s to 10 mm 2 /s at 100 C 5 mm 2 /s to 40 mm 2 /s at 38 C and 1 mm 2 /s to 10 mm 2 /s at 100 C Ethylene glycol may be considered as hazardous material and/or waste Don t use commercially available automotive antifreeze (plating of additives at seal parts) Paraffin-based high purity oils With little or no additive for wear/oxidation resistance (plating of additives at seal parts) Synthetic-based oils Three years continuous operation without adverse deterioration. Uncritical normal buffer/barrier fluid leakage. Compatibility with the sealed medium. Compatibility with the materials of the sealing system initial boiling point min. 28 C above exposed temperature. Flash point > service temperature (if O 2 is present). Compatibility with max./ min. process temperature. Freezing temperature < ambient temperature at site. Viscosity < 500 mm 2 /s at minimum temperature. Viscosity over the entire operating-temperature range. Consider gas solubility in viscous barrier fluids (> 10 bar). ISO API 682 Seal category Step I Seal arrangement Step II Seal type Step III Letters and numbers C1, C2, C3 A1, A2, A3 A, B, C Note Example Arrangement 1 can be a 1CW-FX or 1CW-FL Arrangement 2 can be a 2CW-CW, 2CW-CS or 2NC-CS Arrangement 3 can be a 3CW-FB, 3CW-FF, 3CW-BB, 3NC-FB, 3NC-FF or 3NC-BB Seal materials are not part of this code (default materials assumed) A code for engineered mechanical seals (ES) is not specified Features: category 2, arrangement 2, type A, flush plan 11 and flush plan 52 Code: C2A2A1152 API plans Step IV 01, 02, 11, 12, 13, 14, 21, 22, 23, 31, 32, 41, 51, 52, 53A, 53B, 53C, 54, 61, 62, 65, 71, 72, 74, 75, 76 Letters and numbers Note Example 1 Example 2 Example 3 Seal family Seal diameter Design details Materials process side seal atmospheric side seal -E... (single seal) H75VN, MFL85 / 90 /mm -PTA... (tandem seal) according to EN MFL65, MFLWT80 / 90 /inch e.g. Q2Q2VMG-AQ2VMG CGSH,... -D... (back-to-back) (face-to-face) Coding: seal code, material code (ISO seal code, configuration code) Features: Rotating metal bellows seal, seal diameter 70 mm, single seal, materials Code: MFL85N/70-EX, AQ2VM5G, (C2A1B1162, 1CW-FL) Features: Pusher type seal, inboard seal diameter 50 mm, tandem arrangement, materials Code: H75VK/50-PTAX, Q2Q2VMG-AQ2VMG, (C2A2A1152, 2CW-CW) Features: Engineered mechanical seal (ES), seal diameter 210 mm, single seal, materials Code: SHV/210-EX, AQ2VMG, (C2A1ES1161, 1CW-FX) Return pump (KSB) with tandem seal type H75S2/60-H75F2/55 according to API 682 Plan 52 for sealing C 4 hydrocarbon. Buffer.medium: methanol mechanical seal type MFLWT80/ S1-FD/58-E3 with thermosiphon system TS2000/M073-A1 to seal ethylene oxide (Sulzer pumps). 27

28 Objectives and Category Details API 682 and ISO 21049** ) Category 1*** ) Category 2 Category 3 Objective 1* ) : seal operation Continuously for 25,000 h without need for replacement Objective 2* ) : containment seal operation At least h without need for replacement at any containment seal chamber pressure equal to or less than the seal leakage pressure switch setting (< 0,7 bar g (10 PSI)) and for at least 8 h at the seal chamber conditions. Objective 3* ) : emissions Complying with local emissions regulations or exhibiting a maximum screening value of 1,000 ml/m 3 (1,000 ppm vol.) as measured by the EPA Method 21, whichever is more stringent. Basic design features (4.1.3 / 6.1) Balanced mechanical seal, inside-mounted, cartridge design, type SS316 (1.4571) or better for sleeve and housing Throttle bushing requirement for arrangement 2 and 3 seals (7.2.3 / Fixed carbon, if specified ) Flush connection to the process side for arrangement 3 seals ( ) If specified Shaft diameter (1) 20 mm (0.75 inch) to 110 mm (4.3 inch) Seal chamber size (4.1.2) ISO 3069 type C, ASME B73.1 and ASME B73.2 ISO / API th edition Cartridge seal sleeve size increments required None 10 mm increments ( ) Temperature range (4.1.2) -40 to 260 C (-40 to 500 F) -40 to 400 C (-40 to 750 F) Pressure range, absolute (4.1.2) 22 bar a (315 PSI) 42 bar a (615 PSI) Face materials ( ) Premium blister-resistant carbon (A) vs. Premium blister-resistant carbon (A) self-sintered silicon carbide (Q1) vs. reaction-bonded silicon carbide (Q2) Gland plate metal-to-metal contact requirement Required ( ) Required inside and outside the stud circle diameter ( ) Tangential buffer/barrier fluid outlet for arr. 2 and 3 seals ( / ) If specified Required Throttle bushing design requirement for Fixed carbon Fixed, non-sparking metal arrangement 1 seals ( ) Floating carbon option ( ) Floating carbon Scope of vendor qualification test Test as category 1 Test as category 2 Test as category 3, entire seal Unless faces interchangeable with category 3 ( ) assembly as a unit ( ) Distributed inlet flush requirements arr. 1 and 2 with rotating flexible element When required or if specified ( / ) Required ( ) Seal circulation device head flow curve provided ( ) If specified Required Proposal data requirements (11.2.1) Contract data requirements (11.3.1) Minimal Rigorous *) All technical specifications are based on extensive tests and our many years of experience. The diversity of possible applications means, however, that they can serve only as guide values. We must be notified of the exact conditions of application before we can provide any guarantee for a specific case. Subject to change. API / ISO paragraphs in brackets (** Please also ask for Apitex mechanical (*** seals Pump (Ruhrpumpen) with seal H75S2/70-FTA1 according to API 682, plan 52. Medium: C 3-fraction; barrier fluid: methanol Recycle oil pump (BW/IP) with tandem seal H75S2/85-FTA5 according to API 682 plan 52 to seal hydrocarbons. Temperature -13 C, Barrier fluid: methanol. 28

29 Profile Certifications ISO 9001:2000 EN 9100 ISO OHSAS ATEX 94/9/EG (Headquarters Wolfratshausen (D (Niigata (J QHD Qualified Hygienic Design VDMA DIN/EN HPO certified KTA 1401 Certified for Nuclear Power Plants (Plant D Plant Judenburg (A) ISO TS WHG Fachbetrieb ( 19) Germanischer Lloyd Approvals IHK Prüfungsbetrieb Umweltpakt Bayern An alliance with a great deal to offer our customers and partners and the leading Japanese mechanical seal manufacturer Eagle Industry have laid the foundation for a global cooperation: an alliance with a pronounced understanding. for quality and service as well as customer orientation The basis of this arrangement is an intensive and trust-based cooperation that notably strengthens the global competitiveness of both partners and makes them one of the top suppliers of sealing technology on the world market. A worldwide presence, market-orientated products and high-quality services are further key factors of success. All this, together with the know-how and dedication of our employees, means that we have considerable potential to offer our customers. We are there when you need us Customers want proximity, speed and solutions to their problems. Thanks to our worldwide presence, flexibility and specialist know-how we can face these challenges with quiet confidence. All over the world we offer our in-depth package of services from the simple stuffing box packing to the complex high-tech seal, plus the backing of our TotalSealCare TM modular support offering, which allows each customer to put together exactly the right service package based on individual needs and requirements. Numerous service contracts and international agreements attest to the trust which top-name companies place in our expertise and confirm the quality of our services. Making our customers more successful Our customers expect their machines to operate without problems. With this objective in mind, we are working to produce innovative, economically rational and easy-to-use seal solutions that help to fulfill the highest requirements in terms of environmental protection and safety. In doing so, it is our intention to increase our customers efficiency and productivity and to put across our global profile as a reliable, competent partner for high quality and technological leadership. The technical knowledge, creativity, motivation and performance of our workforce makes a major contribution to achieving these objectives and making our customers more successful. 29