SERIES 3000 BLANKET GAS REGULATORS
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1 SERIES 000 BLANKET GAS REGULATORS Numbers:,, P, 00A, 00, 01L, 01H, 01HP WHAT IS A BLANKET GAS REGULATOR? 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 Set pressure is field adjustable Modulating opening imal 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 cutaway shown Eliminates the need for a multiple regular system or for complicated pilot operated blanketing Materials Available in 1 stainless steel or other material by request
2 Why Gas Blanketing? Blanket gas regulars from Groth Corporation ensure that a constant gas pressure is maintained in the Emergency Relief Valve A, A, 0A, 00A Pressure/Vacuum Relief Valve / A, A, 10, 10A, 8800A, 880A Blanket Gas Regular From 0. w/one regular,, P, 00A, 00, 01L, 01H, 01HP OPTIONS To complete your blanket gas system, Groth Corporation can provide a vapor space of a srage tank. A blanket gas regular supplies an inert gas prevent a vacuum from variety of additional devices 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. Not all models may be set the complete range. Optimum Protection for measuring, managing, and maintaining the cleanliness of your srage system: Gauges Purges Filters Contact Groth Corporation or your local representative for more information. 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 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, ) a properly-sized pressure/vacuum relief valve or pilot operated valve, release the vapor during pump-in or thermal expansion, and ) a properly-sized 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 0 ISO 800 EPA Publication AP- NFPA 9 - Standard on Explosion Prevention Systems OSHA Part 19.1
3 OPERATION & FLOW CAPACITY MODEL SELECTION Flow Capacity Required flow capacity should be determined by using API 0 ISO 800 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: CO, nitrogen, and natural gas. The flow capacities in the table are achieved with the 0% orifice selection. For reduced capacity, multiply the table values by the reduced percentage. 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 0% % capacity, and can be locked down prevent tampering. Table 1 Flow Capacity (Applies s, P, 00A, 01L, 01H, and 01HP. Consult facry for 00) Flow Capacity 1/ Flow Capacity 1 Pressure Natural GAS Natural GAS Carbon Dioxide Nitrogen Carbon Dioxide Nitrogen 0. SG 0. SG SCFH NCMH SCFH NCMH SCFH NCMH SCFH NCMH SCFH NCMH SCFH NCMH Note: Unless otherwise specified, the orifice selecr sleeve is facry set at 0% capacity. Table Positive Pressure Selection Guides 1/ BGR Pressure / mbar OUTLET >1 1. >1.0. >. 1 BGR Pressure / >1 1. >1.0. P 00A OPEN INLET >. REMOTE SENSE PORT ½ FNPT Table Negative Pressure Selection Guides 1/ BGR Pressure / OUTLET > H >1.0. >. 01L 1 BGR Pressure / > H > HP CLOSED INLET 01L >.
4 SPECIFICATIONS SPRING RANGES Table / Pressures Table s Notes: Number 01L 01H imum / Blanket Gas Regular Allowable Working Pressure (MAWP) imum set pressure for with supply pressure is 1. Pressure (MSP) Shipping Weight lb kg No. / (01L) / (01H) 1/ Blanket Gas Regular When spring ranges overlap, select the lighter spring / setting applicable both pressure and vacuum (vacuum model when used) Consult the facry for regulars with settings less than - Number P 00A 00 01L 01H 01HP imum mbar mbar , Blanket Gas Regular Allowable Working Pressure (MAWP) NOTE: When spring ranges overlap, select the lighter spring. Consult the facry. Pressure (MSP) Shipping Weight Lb (kg) No. / (01L) / (01H) 1 Blanket Gas Regular No P/ (01HP) A
5 HOW TO ORDER How Order Standard BGRs For easy ordering, select proper model number MODEL # Using Table or 01L 01H P 01HP 00A 1" Regulars 1/" Regulars EXAMPLE INLET MATERIAL SOFT ORIFICE Selecr SPRING OPTIONS OUTLET GOODS Position RANGE Inlet Outlet E = 1/" # ANSI RF Flange O = 1/" NPT F = DN1 PN /1 DIN RF Flange S = 1/" Sanitary Connections Q = 1/" Quick Couplings A = 1" # ANSI RF Flange N = 1" NPT C = DN PN /1 DIN RF Flange R = 1" Sanitary Connections Body Material = 1 SS B = Buna-N C = CHEMRAZ E = EPDM V = VITON Z = Special Orifice Selecr Position 1 = 0% = % = 0% = % = 0% = 1% = % 8 = % Not available for 1/" size. Select from Table Options O = No Options Z = Special Options H N V 1 0 Indicates a Regular with 1" NPT body connections, 1 SS construction, VITON elasmers, full capacity orifice, set pressure range from and no special requirements. 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 - Actuar diaphragm is only available in TEFLON PFA Pressure Equipment Directive Available When Specified GROTH CORPORATION 10 N. Promenade Blvd. Stafford, TX USA Phone: (81) Toll Free: (800) -8 Fax: (81) sales@grothcorp.com Website: CORPORATE HEADQUARTERS 10 W. Heartland Drive Liberty, MO 08-8 USA Phone: (81) 9-0 FAX: (81) 9- / pressure@contdisc.com Website: THE NETHERLANDS Energieweg 0 8 NJ Zoeterwoude-Rijndijk The Netherlands Phone: + (1) 1- FAX: + (1) 1- cdcnl@contdisc.com CHINA Room 9, Tower B, COFCO Plaza No. 8 JianGuoMenNei Avenue Beijing (000), P.R. China Phone: + (8) --88 Fax: + (8) --88 Mobile: + (8) cdcchina@contdisc.com INDIA Groth Continental Mfg. Pvt. Ltd. /P/, Mahagujarat Industrial Estate, Moraiya, Sarkhej-Bavla Road, Ahmedabad (GJ) 81, INDIA Phone: Fax: gcmpl@contdisc.com CHEMRAZ is a registered trademark of Greene, Tweed & Co VITON is a registered trademark of DuPont Performance Elasmers TEFLON is a registered trademark of DuPont and used under license by Groth Corporation reserves the right alter the information in this publication without notice. Printed in U.S.A. Reproduction without written permission prohibited. 0 Groth Corporation LIT0 0
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