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71 Series Pilot Operated Pressure Relief Valve

Brand: Sarasin-RSBD®

The Sarasin-RSBD® 71 Series design has been developed to protect the piping or vessel against thermal expansion overpressure in gas service, keeping operating pressure close to the set pressure.

The Sarasin-RSBD® 71 Series design is based on a thermal expansion spring-loaded body design - 9 Series.

The Sarasin-RSBD® 71 Series are an engineered, custom-made design that has been industrialized and offers a full nozzle pilot operated pressure relief valve for use in industrial gas service.

The full nozzle option insures body chemical protection.

In case of an upgraded process: higher back pressure or higher operating pressure, the customer can change from a spring loaded to pilot operated version, keeping the same center-to-face dimension.

The full nozzle option includes integral wetted components which offer the advantage of removal for maintenance and replacement.
Features
  • ASME BPVC Section VIII Compliant
  • Full Nozzle
  • Metal Seat
  • Anti-seizing Capabilities to Prevent Sticking
  • Repeatable Set Pressure
  • Hinged Disc

Specifications

Design Standards

  • ASME BPVC Section VIII
  • API STD 520/527
  • ISO 4126
  • Directive 2014/68/UE
  • ATEX 94/9/EC
  • EAC TR CU 10/12/32
  • SELO TS
  • Marine Standards

Design Ratings

  • ASME & API Class 150 to 2500
  • API Class 5K & 10K (customized)

Size Range and Dimensions

  • 15 - 40 mm (0.5 - 1.5 inches)

Pressure Range

  • Up to 431 bar (6,251 psig) with Standard ASME Class

Temperature Range

  • Reaching -60° C (-76° F) Cryogenic Levels to 327° C (620° F)

Capacity

  • Individually Calculated and Selected for Each Process Application

Seat Tightness

  • 95%

Materials

  • Carbon Steel
  • Austenitic Stainless Steels

  • Industrial Gas
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