APPLICATION ENGINEERING API 682

Transcription

1 PPLITION ENGINEERING 682 Mechanical Seals & Supply Systems for: Refinery & Petrochemical pplications Selection and application recommendations according to 682. E 3 /

2 Step I ategory ategory 1 ategory 2 ategory 3 ISO 3069 type, SME 73.1, SME 73.2 ISO / th edition , 21 bar g (-40 F 500 F, 300 PSI) , 41 bar g (-40 F 750 F, 600 PSI) Minimal data requirements Step II rrangement and configuration rrangement 1 Single seal cartridge rrangement 2 Dual seal cartridge - pressure between seals less than seal chamber pressure - internal reverse balance feature - fixed carbon throttle bushing rrangement 3 Dual seal cartridge - pressure between seals higher than seal chamber pressure - internal reverse balance feature - fixed carbon throttle bushing Default Optional Optional configurations configurations design feature 1W-FX ontacting Wet - FiXed throttle bushing ategory 1: carbon throttle bushing ategory 2: non-sparking metal throttle bushing ategory 3: not applicable 1W-FL ontacting Wet - FLoating throttle bushing ategory 3: carbon throttle bushing ategory 1 and 2: carbon throttle bushing 2W-W ontacting Wet - ontacting Wet 2W-S ontacting Wet - ontainment Seal (non-contacting or contacting S) 2N-S Non-ontacting - ontainment Seal (non-contacting or contacting S) 3W-F ontacting Wet - Face-to-ack 3W- ontacting Wet - ack-to-ack 3W-FF ontacting Wet - Face-to-Face 3N- Non- ontacting - ack-to-ack 3N-FF Non-ontacting - Face-to-Face 3N-F Non-ontacting - Face-to-ack lassification of Sealing Systems 682 and ISO specify a range of different sealing systems. Parameters such as category, arrangement, configuration, type and plans are to be considered. The chart 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 plans. 682 and ISO specify six default configurations and five optional configurations. Each of these configurations can be realized with different seal types. 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. 682 and ISO specify three basic seal types, a fourth option is a totally engineered sealing system (ES). Step IV: ompletes the sealing system classification by selecting the required plan. 682 and ISO introduce a seal code which contains information about the category, arrangement, type and plan. ategories, rrangements and Seal Types 1 Rigorous data requirements Step III Type and spring position Type Pusher seal Temperature: -40 to 176 (-40 to 350 F) Pressure: 41 bar g (600 PSI) Multiple springs: lloy -276 Single spring: SS 316 O-rings: FKM or FFKM NR, HNR, EPM, EPDM, TFE Type Metal bellows seal with O-rings Temperature: -40 to 176 (-40 to 350 F) Pressure: 21 bar g (300 PSI) Metal bellows: lloy -276 O-rings: FKM or FFKM NR, HNR, EPM, EPDM, TFE Type Metal bellows seal with flexible graphite Temperature: -40 to 400 (-40 to 750 F) Pressure: 21 bar g (300 PSI) Metal bellows: lloy 718 Sealing element: flexible graphite Totally Engineered Sealing system (ES) Flexible element Rotary springs Seal face surface speed < 23 m/s Stationary springs Seal face surface speed > 23 m/s For service conditions outside the operating limits of type, and Temperature: < -40 or > 260 (< -40 or > 500 F) category 1 < -40 or > 400 (< -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: Medium: below 20 mm (0.75 inch) or above 110 mm (4.3 inch) highly corrosive fluids for which the specified materials in 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 (68 F) of the mini - mum ambient temperature.

3 rrangement 1 Single Seal onfigurations and Plans Process side tmospheric side Plan 11 Recirculation from discharge to seal chamber 1W-FX ontacting Wet - FiXed throttle bushing Example: UFL850N (type ) F D Q Plan 61 Plugged connections plugged Plan 13 Recirculation from seal chamber to suction Plan 62 External quench Quench 1W-FL ontacting Wet - FLoating throttle bushing F D Q drain Plan 23 Internal recirculation through a cooler TI Each configuration is available for seal types, and Plan 65 Leakage control by float type level switch Plan 31 Recirculation from discharge through a cyclone separator to seal chamber LSH drain Plan 32 External flush into the seal chamber Option SM lient TI FI Default configurations Optional configurations 2

4 rrangement 2 Dual Seal onfigurations and Plans Pressure between seals less than seal chamber pressure Process side etween seals Plan 11 Recirculation from discharge to seal chamber 2W-W F ontacting Wet ontacting Wet LO LI Plan 52 Unpressurized buffer fluid system flare PSH filling LI LSH LSL if specified Plan 13 Recirculation from seal chamber to suction 2W-S ontacting Wet ontainment Seal SM lient F SV SD GI if specified FSH M FE PSL PV F I L Plan 32 External flush into the seal chamber Option SM lient FI Plan 72 uffer gas system TI Each configuration is available for seal types, and Plan 75 ondensate recovery for condensing leakage flare PSH LI LSH if specified drain Plan 14 Recirculation from seal chamber to suction and circulation from discharge to seal chamber 2N-S Non-ontacting ontainment Seal SV SD GI Plan 76 Vapour recovery system for noncondensing leakage PSH flare drain Default configurations Optional configurations 3

5 rrangement 3 Dual Seal onfigurations and Plans arrier fluid pressure higher than seal chamber pressure Process side etween seals Plan 02 Dead end (plugged connections) 3W-F ontacting Wet Face-to-ack Plan 53 arrier fluid reservoir N2 PSL filling LI LSH LSL if specified WS\NNLK Plan 11 Recirculation from discharge to seal chamber 3W- ontacting Wet ack-to-ack Plan 53 arrier fluid bladder accumulator system vent PSL filling TI if specified Plan 13 Recirculation from seal chamber to suction 3W-FF ontacting Wet Face-to-Face Plan 53 arrier fluid piston accumulator system LSL LI PRV vent PSL filling TI if specified Plan 14 Recirculation from seal chamber to suction and circulation from discharge to seal chamber Plan 54 External barrier fluid system external source Default con gurations Optional con gurations 4

6 rrangement 3 Dual Seal onfigurations and Plans arrier gas pressure higher than seal chamber pressure Process side etween seals Plan 02 Dead end (plugged connections) 3N- Non-ontacting ack-to-ack Plan 74 Pressurized barrier gas SM lient plugged if specified PSL FSH M FE PV F I L 3N-FF Non-ontacting Face-to-Face 3N-F Non-ontacting Face-to-ack Default configurations Optional configurations 5

7 Sealing systems selection by seal features rrangement Default configuration Type Flexible element Single seal cartridge Dual seal cartridge Operated with unpressurized buffer medium Dual seal cartridge Operated with pressurized barrier medium 1W-FX 1W-FL 2W-W (tandem) 2W-S (tandem) 3W-F (tandem) 3N- ontacting Wet seal with a FiXed throttle bushing applicable plans (process side): 01, 02, 11, 12, 13, 14, 21, 23, 31, 32, 41 applicable plans (atmospheric side): 51 / 61, 62, 65 ontacting Wet seal with a FLoating throttle bushing applicable plans (process side): 01, 02, 11, 12, 13, 14, 21, 23, 31, 32, 41 applicable plans (atmospheric side): 51 / 61, 62, 65 ontacting Wet seals applicable plans (process side): 01, 02, 11, 12, 13, 14, 21, 23, 31, 32, 41 applicable plans (between seals): 51, 52 ontacting Wet inner seal with a ontainment Seal applicable plans (process side): 01, 02, 11, 12, 13, 14, 21, 23, 31, 32, 41 applicable plans (between seals): 71, 72, 75, 76 ontacting Wet seals in Face-to-ack arrangement applicable plans (process side): 01, 02, 11, 12, 13, 14, 32 applicable plans (between seals): 53, 53, 53, 54 Non-ontacting seals in ack-to-ack arrangement applicable plans (process side): 01, 02, 11, 12, 13, 14, 32 applicable plans (between seals): 74 Rotary springs Stationary springs Rotary springs Stationary springs Rotary springs Stationary springs Rotary springs Stationary springs Rotary springs Stationary springs Rotary springs Stationary springs rrangement Most common optional configurations Type Flexible element 2 See above 2N-S (tandem) Non-ontacting inner seal with a ontainment Seal Rotary springs 3W- ontacting Wet seals in ack-to-ack arrangement Rotary springs 3 See above 3N-F (tandem) Non-ontacting seals in Face-to-ack arrangement Stationary springs Default configurations Optional configurations Operation mode plan Description 21/22 irculation from pump discharge through cooler to seal Primary flush 23 irculation of liquid from seal chamber through cooler to seal 31 (41) irculation from discharge through cyclone separator to seal 32 Injection of clean liquid into seal chamber 51 External reservoir provides static liquid quench Quench/buffer 52 External reservoir provides circulation buffer liquid systems 62 External source provides flowing quench liquid 72 Gas buffer system 53 arrier liquid system with reservoir 53 arrier liquid system with bladder accumulator arrier systems 53 arrier liquid system with fluid piston accumulator 54 arrier liquid system from external source Leakage collection/alarm 74 arrier gas system 65 Recovery system with level control for liquid leakage 75 Recovery system for condensing leakage 76 Recovery system for non-condensing leakage 6

8 Seal Selection by Media Groups Standard seal type Temperature ( F) Pressure bar g (PSI) Mechanical seal Supply system Type rr. 1) plan 2) Non-hydrocarbons Non-flashing hydrocarbons Flashing hydrocarbons Water < 80 (180) < 21 (300) ( ) 1 11 > 80 (180) < 41 (600) 1 23 < 21 (300) Sour water ( ) < 21 (300) austic, amines, crystallize 1 62 < 80 (180) ( ) H 2 SO 4 (max. 20% at 25 ) < 21 (300) 3 53 H 3 P0 4 (max. 20% at 80 ) ll other acids ES 3 note 3) < 21 (300) 53 (-40 20) ( ) 53 or < 21 (300) 53 bsolute vapour pressure (20 350) ( ) 53 or less than 1 bar < 21 (300) at pumping temperature ( ) ( ) ES < 21 (300) ( ) ( ) ES < 21 (300) 53 (-40 20) ( ) 53 or < 21 (300) 53 bsolute vapour pressure (20 350) ( ) 53 or above 1 bar < 21 (300) at pumping temperature ( ) ( ) ES < 21 (300) ( ) ( ) ES Optional seal type when specified Temperature ( F) Pressure bar g (PSI) Mechanical seal Supply system Type rr. 1) plan 2) Non-hydrocarbons Non-flashing hydrocarbons Flashing hydrocarbons Water < 21 (300) or 1 < 80 (180) 600) ES 1 > 80 (180) (300 < 41 (600) 11 Sour water < 21 (300) or ( ) ES 1 32 austic, amines, crystallize 62 < 80 (180) H 2SO 4 (max. 20% at 25 ) < 21 (300) or 3 53 H 3 P0 4 (max. 20% at 80 ) < 21 (300) ( ) or ES 1 1 ll other acids ES 3 note 3) < 21 (300) or 3 53 (-40 20) ( ) ES 3 53 bsolute vapour pressure < 21 (300) or less than 1 bar (20 350) at pumping temperature ( ) < 21 (300) ES ES ( ) ( ) < 21 (300) ES 3 ( ) ( ) note 3) < 21 (300) 53 (-40 20) ( ) 53 bsolute vapour pressure above 1 bar at pumping temperature (20 350) ( ) ( ) < 21 (300) ( ) ES < 21 (300) ( ) < 21 (300) ( ) ) specific application may allow another seal arrangement. Please contact Sealmatic for further information. 2) specific application may allow additional or different plans. Please contact Sealmatic for further information. 3) The Sealmatic seal type and the plan(s) are dependant on the specific operation conditions. 7

9 Pusher Seals Type 750VN p 1(max) = 41 bar g (600 PSI) t 1 = ( F) v g(max) = 23 m/s (75 ft/s) Face: arbon (), Si (Q1, Q2) Seat: Si (Q1, Q2) O-rings: FKM, FFKM, EPDM, NR, HNR Springs: lloy -276 **) Other parts: SS316 (1.4571) 750VP With pumping ring. and materials*) see 750VN 750VK With reverse pressure feature. and materials*) see 750VN SV With reverse pressure feature, stationary springs. p 1 (max) = bar g (600 2,115 PSI) t 1 = ( F) v g(max) = m/s ( ft/s) Face: arbon (), Si (Q1, Q2), Seat: Si (Q1, Q2) O-rings: FKM, FFKM, EPDM, NR, HNR Springs: lloy -276**) Other parts: SS316 (1.4571) refer to default seal face combination arbon/si *) Default and optional materials available. **) in -4 available, Sealmatic recommendation. 8

10 Metal ellows Seals Type and UFL850N/900N UFL850P UFL850N for arrangement 1 and 2 (external pressurization) UFL900N for arrangement 3 (internal pressurization) p 1 (max) = 25 bar g / 23 bar g (363 PSI / 334 PSI) t 1 = ( F) v g(max) = 23 m/s (75 ft/s ) Face: arbon (), Si (Q1, Q2), Seat: Si (Q1, Q2) O-rings: FKM, FFKM, EPDM, NR, HNR, Other parts: SS316 (1.4571) ellows: lloy -276 (in lloy 718 available, Sealmatic recommendation) With pumping ring. and materials*) see UFL850/900N We UFL650 UFLWT800/900 We With stationary bellows. p 1 (max) = 25 bar g (363 PSI) t 1 = ( F) v g(max) = 50 m/s (164 ft/s) Face: arbon (), Si (Q1, Q2), Seat: Si (Q1, Q2) O-rings: Flexible graphite ellows: lloy 718 Other parts: SS316 (1.4571), Ni42 (1.3917) With rotary bellows. UFLWT800 for arr. 1 and 2 (ext. press.), UFLWT900 for arr. 3 (internal pressurization). p 1(max) = 25 bar g / 23 bar g (363 PSI / 334 PSI) t 1 = ( F) For temperatures below -20 (-4 F) UFLT 800/920 v g(max) = 23 m/s (75 ft/s) Face: arbon (), Si (Q1, Q2), Seat: Si (Q1, Q2) O-rings: Flexible graphite, ellows: lloy 718 Other parts: SS316 (1.4571), Ni42 (1.3917) refer to default seal face combination arbon/si. *) Default and optional materials available. 9

11 3N- Gas Seals Type p 1(max) = 25 bar g (363 PSI) t 1 = ( F) v g(max) = 23 m/s (75 ft/s) Face: arbon (), Si (Q1, Q2) Seat: Si (Q1, Q2) O-rings: FKM, FFKM, EPDM, NR, HNR Springs: lloy -276**) Other parts: SS316 (1.4571) 3N- 3N-F S Non-contacting containment seal p 1(max) = 25 bar g (363 PSI) t 1 = ( F) v g(max) = 23 m/s (75 ft/s) Face: arbon (), Si (Q1, Q2) Seat: Si (Q1, Q2) O-rings: FKM, FFKM, EPDM, NR, HNR Springs: lloy -276**) Other parts: SS316 (1.4571) p 1(max) = 41 bar g (600 PSI) t 1 = ( F) v g(max) = 23 m/s (75 ft/s) Face: arbon (), Si (Q1, Q2) Seat: Si (Q1, Q2) O-rings: FKM, FFKM, EPDM, NR, HNR Springs: lloy -276**) Other parts: SS316 (1.4571) ontainment Seals Type 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 ''2W-S'' and the optional configuration ''2N-S'' ontainment seals can be of non-contacting or contacting kind. Non-contacting containment seals feature aerodynamic grooves which provide a reliable liftoff of the seal faces even at low velocities. ontacting 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. p 1(max) = 25 bar g (363 PSI) t 1 = ( F) v g(max) = 23 m/s (75 ft/s) refer to default seal face combination arbon/si. *) Default and optional materials available. **) in -4 available, Sealmatic recommendation. S ontacting containment seal Materials Face: arbon (), Si (Q1, Q2) Seat: Si (Q1, Q2) O-rings: FKM, FFKM, EPDM, NR, HNR Springs: lloy -276**) Other parts: SS316 (1.4571) p 1 (max) = 2 bar g (29 PSI), dry operation t 1 = ( F) v g(max) = 23 m/s (75 ft/s) In the event of primary seal failure the S 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 Si O-rings: FKM, FFKM, EPDM, FVMQ Springs: lloy -276 Other parts: SS316 **) in -4 available, Sealmatic recommendation. 10

12 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 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. Plan 22 (21) Plan 21: Without strainer St St Seal chamber cooling and neck bush are necessary, unless otherwise Dead specified. end seal chamber with no circulation. Plugged connections for possible future circulation and quench. Plan 02 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 23 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 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 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 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 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 cyclone separator 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 11

13 Plans etween seals 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 Used in harmful/ hazardous applications. Pressurized clean barrier fluid from an external system. Fluid circulation by an external pump or pressure system. Plan 54 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 pplicable with hydrocarbons normally used in conjunction with plan 75 or plan 76. Externally supplied gas buffer (pressure lower than seal chamber pressure). uffer gas may be used to dilute seal leakage. Plan 72 (71) Plan 71: Plugged connections 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. 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 53 Plan 53 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. pplication when pump fluid condenses at ambient temperatures. ontainment seal chamber drain for condensing leakage. connect to plan 75 connect to plan 76 N 2 D quench connection to be located downwards N 2 Plan 74 Plan 75 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 53 pplication where pump fluid does not condense at ambient temperature. ontainment seal chamber vent for noncondensing leakage. Plan 76 N 2 thermosiphon system Device to be located below pump shaft To drain To flare 12

14 Plans tmospheric 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 D Used for leakage detection on single seal. tmospheric side leakage collection and monitoring (alarm high) in external vessel. Plan 65 Selection of uffer and arrier Mediums Sealed fluid arrier/buffer fluid Special notes General demands bove 10 elow 10 queous streams Hydrocarbon streams ISO Hydrocarbon fluid Mixture of water and ethylene glycol Mixture of water and propylene glycol 100 mm 2 /s at 38 and 1 mm 2 /s to 10 mm 2 /s at mm 2 /s to 40 mm 2 /s at 38 and 1 mm 2 /s to 10 mm 2 /s at 100 Ethylene glycol may be considered as hazardous material and/or waste Don t use commercially available automotive antifreeze (plating of additives at seal parts) Parafin-based high purity oils With little or no additive for wear/oxidation resistance (plating of additives at seal parts) Synthetic-based oils Seal category Step I Seal arrangement Step II Seal type Step III Letters and numbers 1, 2, 3 1, 2, 3,, Note Example rrangement 1 can be a 1W-FX or 1W-FL rrangement 2 can be a 2W-W, 2W-S or 2N-S rrangement 3 can be a 3W-F, 3W-FF, 3W-, 3N-F, 3N-FF or 3N- Seal materials are not part of this code (default materials assumed) code for engineered mechanical seals (ES) is not specified Features: category 2, arrangement 2, type, flush plan 1 1 and flush plan 52 ode: Three years continuous operation without adverse deterioration. Non-critical normal buffer/barrier fluid leakage. ompatibility with the sealed medium. ompatibility with the materials of the sealing system initial boiling point min. 28 above exposed temperature. Flash point > service temperature (if O 2 is present). ompatibility 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. onsider gas solubility in viscous barrier fluids (> 10 bar). plans Step IV 01, 02, 1 1, 12, 13, 14, 21, 22, 23, 31, 32, 41, 51, 52, 53, 53, 53, 54, 61, 62, 65, 71, 72, 74, 75, 76 13

15 Objectives and ategory Details 682 and ISO 21049**) ategory 1 ) ategory 2 ategory 3 Objective 1*): seal operation ontinuously for 25,000 h without need for replacement Objective 2*): containment seal operation t 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 omplying with local emissions regulations or exhibiting a maximum screening value of 1,000 ml/m 3 (1,000 ppm vol.) as measured by the EP Method 21, whichever is more stringent. asic design features (4.1.3 / 6.1) alanced 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, SME 73.1 and SME 73.2 ISO / th edition artridge seal sleeve size increments required None 10 mm increments ( ) Temperature range (4.1.2) -40 to 260 (-40 to 500 F) -40 to 400 (-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 () vs. Premium blister-resistant carbon () 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) ontract data requirements (11.3.1) Minimal Rigorous *) ll 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. **) / ISO paragraphs in brackets ***) Please also ask for Sealmatic TX mechanical seals Year Pump specification Mechanical seal specification Note , 10th edition 682, 3rd edition Same wording and structure as in the ISO documents - ISO Enhancements to 682, 2nd edition 2003 ISO Enhancements to 610, 9th edition , 9th edition 682, 2nd edition Seal chambers in 610, new seal coding system in , 8th edition - References 682 1st edition , 1st edition First stand alone seal standard Revised seal coding system , 7th edition - ontains basic seal specification Defines seal coding system Disclaimer: The specifications, drawings, images etc included in this catalogue are intended to be generic and must be interpreted as equivalent or functionally equivalent. The identification of many items is facilitated by illustrations (photographs and general assembly drawings) and mention of, or reference to any specific standards, or trade names, including those that might appear on the photographs, drawings, images etc is intended for illustration purposes only, and does not imply an endorsement or imitation or preference of any specific standard, brand, manufacturer or supplier. Neither does the information imply the availability of any mentioned items. The items discussed alongwith the images, drawings etc portrayed are representative of industry catalogues, standards, terminology and specifications hence, accounting for any resemblance which otherwise may be co-incidental. This atalogue does not contain any guarantee or agreed quality of products or any warranty of merchantability, fitness for a particular purpose and non-infringement. The data and information contained herein are being provided for information only and without responsibility, and Sealmatic makes no representations or warranties, either expressed or implied, as to the accuracy, completeness, or fitness for a particular purpose. Sealmatic does not accept any responsibility or liability with regard to the reliance on, or use of this data and information. Sealmatic is continuously improving and upgrading their products with respect to quality and application and therefore any changes made to the catalogue may be made without any notice. 14