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Crosby: JOS-E/JBS-E spring loaded API-526




Styles JOS-E and JBS-E product featuresBellows and top flangeCrosby Styles JBS-E and JLT-JBS-E balanced bellows pressure relief valves provide optimum valve performance when the developed back pressure in exhaust systems or discharge manifolds becomes excessive.All standard JBS-E and JLT-JBS-E relief valves feature a standard bellows and top flange Model JOS-E API 526 Crosby Style JCE Safety Relief Valves provide full overpressure protection for process systems at an affordable cost of ownership.

  • Certified to BS6759 parts 1, 2 and 3 by SAFED.
  • A.D.Merkblatt (TUV Approval).
  • ASME Code Section VIII (National Board Approval), with “NB/UV” stamp.
  • Stoomwezen rules A1301.
  • UDT Poland.
  • Chinese SQL.
  • Australian standard AS1271.
  • Full lift maximum discharge capability.
  • Each valve individually tested and set.
  • Top un-wetted guiding giving unobstructed seat bore.
  • Positive re-seating with either resilient or stainless steel trim.
  • Comprehensive range of accessories.
  • Precision lapped stainless steel trim.
  • Discharge capacity at 5% overpressure on steam duty (BS6759 & AD Merkblatt).
  • Low stress springs to BS6759.

OMNI-TRIM: Series 800/900



The excellent performance of the pressure seal type range, is optimal in high pressure and high temperature applications.

  • Relieving capacities certified by National Board of Boiler and Pressure Vessel Inspectors.
  • Certification includes air and steam for Series 800, and air, steam and water for Series 900.
  • Valves manufactured in accordance with the requirements of ASME Boiler and Pressure Vessel Code Section VIII and Section III.
  • Superior seat tightness. Precision lapped flat metal-to-metal seats, or elastomer or TFE O-ring soft seats provide the ultimate in seat tightness.
  • Maximum corrosion resistance. Trim components are stainless steel as standard. All 316 stainless steel, Monel®, Hastelloy® and NACE* optional constructions are available.
  • Spring standardization. Standard Series 800 and Series 900 OMNI-TRIM® pressure relief valves are suitable for inlet temperatures to 750°F [399°C], using a 17-7PH stainless steel spring.
  • Positive built-in lift stop.
  • Fewer parts result in increased reliability and ease of maintenance.
  • Series 800 pressure relief valves have an external blowdown adjustment allowing for short blowdown, smaller differential between operating and set pressures, and reduced product loss.
  • Series 900 OMNI-TRIM® valves use a single trim design for liquid, gas and vapor services.
  • Series 900 OMNI-TRIM® valves provide reliable blowdown without the need for adjustment.

Anderson Greenwood: Pilot Operated, Series 200 / 400 / 500 / 700 / 800 / 5100



  • Balanced for back pressure without the use of bellows which reduces the initial cost of the valve and the long-term maintenance cost.
  • External, independent blowdown adjustment provides easy, accurate and repeatable settings. Reduces costly removal of valve or system downtime.
  • ASME Section VIII Code Stamp. Certified National Board capacities for gas, liquid and steam service.
  • Unique field test capability allows accurate set pressure verification with valve in service. No system isolation block valve or rupture disc required.
  • Full lift at set pressure allows D.O.T. installation to be set higher than Maximum Allowable Operating Pressure (MAOP), resulting in increased system throughput.
  • Series 5100 specifically for economizer service applications meeting the requirements of ASME Code Section I and Code Case

Anderson Greenwood: Pilot Operated, Series 5200




Developed specifically to serve economizer applications requiring pressure relief under the stringent requirements of ASME Section. This unique and challenging application requires premium performance on a valve that must have ASME Section I certified capacities for both steam and water. A modulating pilot operated pressure relief valve is the ideal solution to this difficult application.

Anderson Greenwood: Direct Spring Operated, Series 60 / 80



  • Bubble-tight seating performance allows maximum system throughput and system optimization.
  • Standard soft seated design is bubble-tight for repeated cycles, resulting in low long-term maintenance costs. Inexpensive O-rings are recommended spare parts.
  • With more stringent environmental regulations and increasing product costs, vapor control and recovery is becoming increasingly important. Anderson Greenwood products are ideal for applications where venting must be kept to an absolute minimum.

Anderson Greenwood: Tank Blanketing Valves



  • Simple calibration, single unit reduces pressure from 200 psig to 1/2" wc.
  • Maintains setting regardless of supply pressure variations.

Anderson Greenwood Low Pressure Pilot Operated, Series 90 / 9000




  • Zero leakage up to set point.
  • Balanced against back pressure.
  • Pop or modulating action.
  • Available in Aluminum, Carbon Steel, Stainless Steel, and other materials.

Varec: API 2000 Pressure and Vacuum Relief



Varec's modular product offering uses interchangeable components for assembling a variety of functional configurations, which adds flexibility for field installation, repair and on-site upgrades.

  • Oversized ports provide maximum flow capacity.
  • Replaceable seat rings.

Varec: API 2000 Emergency Pressure Relief Manway Covers, Series 221



  • Incorporates a spring-loaded vacuum relief valve integral to the cover assembly.
  • Features a diaphragm type seating surface on the pressure side.
  • The diaphragm is fabric reinforced for durability, and is backed by compressible, cellular non-metallic pads for added cushion and reduced leakage
  • Hinged cover for proper reseating and safety.
  • API 650 or ASME 150 flange drilling

Flame Arrestment




  • Used in conjunction with low flash point liquids and flammable gases or vapors.
  • This design helps reduce surface friction, optimizing flow capacity and minimizing pressure drop. The large surface area of the bank also improves heat dissipation.
  • UL and FM approved.
  • Extensible bank frame available for easy cleaning.

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