BLANKET GAS REGULATORS

Transcription

1 000 SERIES BLANKET GAS REGULATORS Model Numbers: // P // 020A 01L // P A Blanket Gas Regular supplies an inert gas prevent a vacuum from developing when liquid is removed from a tank, maintain the desired blanket pressure when the temperature drops, and prevent outside air from contaminating the tank or creating a flammable or explosive environment. FEATURES Simple operation, spring-loaded push-push balanced pisn design Bubble-tight shut-off Variable orifice, field-adjustable flow capacity Single stage regular ranges from 0. 1 psig Set pressure is field adjustable Modulating opening Minimal lockup and droop BENEFITS Low maintenance cost Provides optimum gas blanketing of tank and product being sred Prevents evaporation of product and reduces corrosion of tank by providing blanketing gas in vapor space Prevents a flammable or explosive environment in the tank vapor space Ensures pressure is maintained in the vapor space of a srage tank Eliminates the need for a multiple regular system or for complicated pilot operated blanketing MATERIALS Available in 16SS or other material by request

2 BLANKET GAS REGULATOR DATASHEET // PAGE 2 WHY GAS BLANKETING? Blanket Gas Regulars from Groth Corporation ensure that a constant gas pressure is maintained in the vapor space of a srage tank. A blanket gas regular supplies an inert gas prevent a vacuum from developing when liquid is removed from a tank, maintain the desired blanket pressure when the temperature drops, and prevent outside air from contaminating the tank or creating a flammable or explosive environment. A blanket gas pressure as low as 0. prevents outside air and moisture from entering the srage vessel and reduces evaporation of the sred product a negligible amount. The end result: product conservation and significant reduction in tank emissions. The simple design of a Groth blanket gas regular eliminates the need for a multiple regular system or complicated pilot operated blanketing valves. Groth units have tally balanced chambers offer high accuracy and reliability, and ensure a leak-tight design without the need for a pilot valve operate the unit, thus reducing maintenance costs. Groth blanket gas regulars provide a controlled gas environment in srage tanks for the following applications: Refineries Chemical & Petrochemical Plants Liquid Bulk Srage Terminals Pulp & Paper Plants Food & Beverage Srage Emergency Relief Valve INWC +1 psig* Models: 200A, 200A, 2000A, 200A Pressure/Vacuum Relief Valve 0.87 INWC +1 psig/ INWC -12 psig* Models: 1200A, 1220A, 160, 1660A, 8800A, 8820A Blanket Gas Regular From 200 psig 0. INWC* w/one regular Models:,, P, 020A, 01L,, P *Not all models may be set the complete range.

3 BLANKET GAS REGULATOR DATASHEET // PAGE OPTIMUM PROTECTION For optimum protection of a tank and meet all regulary requirements, each tank should be protected by 1) a properly-sized blanket gas regular, maintain the vapor pressure in the tank, 2) a properly-sized pressure/vacuum relief valve or pilot operated valve, release the vapor during pump-in or thermal expansion, and ) a properlysized emergency relief valve protect against pressure rise due external fire. Tank protection systems can be combined across multiple tanks, but careful consideration must be given provide adequate relief and input capacity and prevent fouling or clogging of system piping. Consult the facry for assistance in these situations. A Groth blanket gas regular will prevent evaporation or contamination of product by maintaining the proper atmosphere and pressure on the product sred in a tank. A Groth pressure/vacuum relief valve or pilot operated valve with vacuum relief will prevent vapor from escaping in the atmosphere until the set pressure is exceeded, and provide vacuum protection in case of a gas supply failure. The emergency relief valve will provide vessel protection under control system failure or external fire conditions. The complete system can be provided by Groth Corporation. Benefits of srage tank blanketing are recognized by the following government regulations and industrial standards: API Standard 2000 ISO 2800 EPA Publication AP-2 NFPA 69 - Standard on Explosion Prevention Systems OSHA Part BGR (Cutaway Shown)

4 BLANKET GAS REGULATOR DATASHEET // PAGE OPERATION The Groth blanket gas regular maintains vapor pressure in a tank by opening the supply gas valve when tank pressure (through a sense port) falls below the specified set pressure. When tank pressure is at or above the set pressure, the plate diaphragm is held up by tank pressure. Through the force-multiplying actuar arms, the pisn is held up against the spring pressure, and the supply valve is closed bubble-tight. When the tank pressure falls below the set pressure, the spring force overcomes the pressure. The pisn moves down, and supply gas is released in the tank. The actuating pisn has identical effective areas on the lower pisn seal and the o-ring. This balances the opening and closing forces caused by supply pressure; variable gas supply pressure will not have an effect on regular operation, which eliminates the need for an external pilot control. Pressure against the diaphragm provides direct action against the spring. This push-push design provides maximum force operate the regular and provide a bubble-tight seal. The flow capacity can be limited by the rotatable orifice selecr sleeve. Reducing the blanket gas flow capacity may reduce the need for excessive pressure relieving capacity on smaller tanks. The sleeve is field adjustable from 100% % capacity, and can be locked down prevent tampering. FLOW CAPACITY Required flow capacity should be determined by using API 2000 ISO 2800 or the relevant sizing standard. To find the rated capacity for your application, please refer Table 1, Flow Capacity. Capacity is listed as a function of supply pressure for three typical blanket gases: CO2, nitrogen, and natural gas. The flow capacities in the table are achieved with the 100% orifice selection. For reduced capacity, multiply the table values by the reduced percentage. Table 1 Flow Capacity (Applies Models,, P, 020A, 01L,, and P.) Flow Capacity 1/2" Supply Pressure "Natural Gas Carbon Dioxide Nitrogen 0.6 S.G." psig barg SCFH NCMH SCFH NCMH SCFH NCMH Flow Capacity 1" Carbon Dioxide Nitrogen "Natural Gas 0.6 S.G." SCFH NCMH SCFH NCMH SCFH NCMH Note: Unless otherwise specified, the orifice selecr sleeve is facry set at 100% capacity. NOTE: Product parameters are based on United States cusmary units. Metric units are provided for reference only.

5 BLANKET GAS REGULATOR DATASHEET // PAGE MODEL SELECTION Table 2 Positive Pressure Model Selection Guides Pressure SETTING 0. > > > Supply Pressure psig / barg >0 100 > > Table VACUUM Model Selection Guides 1/2 BLANKET GAS REGULATOR 1/2 BLANKET GAS REGULATOR VACUUM SETTING 0. < < < Supply Pressure psig / barg 0 0. >0 100 > > L 1 BLANKET GAS REGULATOR 1 BLANKET GAS REGULATOR Pressure setting 0. < < < mbar 2.0 < <2.0 psig psig 1 psig barg Supply Pressure psig / barg 0 0. >0 100 P 020A > > VACUUM SETTING 0. < < < < <2.0 psig Supply Pressure psig / barg 0 0. >0 100 P > L > OPEN CLOSED OUTLET INLET OUTLET INLET REMOTE SENSE PORT ½ " FNPT NOTE: Product parameters are based on United States cusmary units. Metric units are provided for reference only.

6 BLANKET GAS REGULATOR DATASHEET // PAGE 6 SPECIFICATIONS Table Min/ Pressures Model Number 01L 1/2 BLANKET GAS REGULATOR Actuar imum Allowable Working Pressure (MAWP) psig barg Shipping Weight lb kg Model Number P 020A 01L P 1 BLANKET GAS REGULATOR Actuar imum Allowable Working Pressure (MAWP) 2 psig 0.1 barg 8 psig 0. barg 2 psig 1.7 barg 7 psig.1 barg 2 psig 0.1 barg 8 psig 0. barg 2 psig 1.7 barg Shipping Weight Lb (kg) NOTE: Product parameters are based on United States cusmary units. Metric units are provided for reference only.

7 BLANKET GAS REGULATOR DATASHEET // PAGE 7 SPRING RANGES Table Spring Ranges 1/2 BLANKET GAS REGULATOR Model No. / (01L) / () Supply psig barg Min Spring Range NOTES: When spring ranges overlap, select the lighter spring Consult the facry for vacuum regular with setting greater than 2 psig BGR Model Number / (01L) / () Supply psig barg Min 1 BLANKET GAS REGULATOR Spring Range Model Number Supply psig barg Min P/ psig (P) psig 1.8 psig psig 2.0 psig psig. psig psig.1 psig A psig 7. psig psig 1.0 psig Spring Range NOTE: Product parameters are based on United States cusmary units. Metric units are provided for reference only.

8 BLANKET GAS REGULATOR DATASHEET // PAGE 8 HOW TO ORDER STANDARD BGRs For easy ordering, select proper model number MODEL # Using Table 2 or INLET MATERIAL SOFT ORIFICE Selecr SPRING OPTIONS OUTLET GOODS Position RANGE 01L P P 020A 1" Regulars 1/2" Regulars Inlet Outlet Body Material O = 1/2" FNPT = 16 SS E = 1/2 10# ANSI RF Flange D = 1 10# ANSI RF Flange on 1/2 Valve F = DN 1 (1/2 ) PN 10/16 DIN RF Flange G = DN 2 (1 ) PN 10/16 DIN RF on 1/2 Valve S = 1/2" Sanitary Connections Q = 1/2" Quick Couplings N = 1 FNPT A = 1" 10# ANSI RF Flange T = 2 10# ANSI RF Flange on 1 Valve C = DN 2 (1 ) PN 10/16 DIN RF Flange D = DN 0 (2 ) PN 10/16 DIN RF Flange on 1 Valve R = 1" Sanitary Connections B = Buna-N C = CHEMRAZ E = EPDM V = VITON Z = Special Orifice Selecr Position 1 = 100% 2 = 7% = 0% = 2% = 20% 6 = 1% 7 = 10% 8 = % Not available for 1/2" size. Spring Range Select from Spring Range Table Options O = No Options Z = Special Options EXAMPLE H N V Indicates a Model Regular with 1" FNPT body connections, 16 SS construction, VITON elasmers, full capacity orifice, set pressure range from and no special requirements. ORDERING NOTES Include model number when ordering For special options, consult facry See flow table for available sizes Consult the facry for regulars with settings less than -2 psig Actuar diaphragm is only available in PFA S M A R T R E L I E F... S A F E S O L U T I O N S VITON is a registered trademark of DuPont Performance Elasmers // CHEMRAZ is a registered trademark of Greene, Tweed & Co GROTH CORPORATION 160 N. Promenade Blvd. Stafford, TX 7777 Ph (281) Fax (281) sales@grothcorp.com grothcorp.com THE NETHERLANDS Energieweg NJ Zoeterwoude-Rijndijk The Netherlands Ph +(1) Fax +(1) cdcnl@contdisc.com CHINA Room 910, Tower B, COFCO Plaza No. 8 JianGuoMenNei Avenue Beijing (10000), P.R. China Ph +(86) Fax +(86) cdcchina@contdisc.com INDIA 2/P/1, Mahagujarat Industrial Estate, Moraiya, Sarkhej-Bavla Road, Ahmedabad (GJ) 8221 INDIA Ph +(91) Fax +(86) gcmpl@contdisc.com Continental Disc Corporation reserves the right alter the information in this publication without notice. // 201 Groth Corporation Reproduction without written permission is prohibited. PRINTED IN U.S.A. LIT107 TEF TMR // 111