• Sarasin 71 Series Pilot Operated Pressure Relief Valve 1
  • Sarasin 71 Series Pilot Operated Pressure Relief Valve 2
  • Sarasin 71 Series Pilot Operated Pressure Relief Valve 3
  • Sarasin 71 Series Pilot Operated Pressure Relief Valve 4
  • Sarasin 71 Series Pilot Operated Pressure Relief Valve 5

SARASIN-RSBD®

71 Series Pilot Operated Pressure Relief Valve

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.

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 & DIMENSIONS

  • 15 – 40mm (0.5 – 1.5 inches)

PRESSURE RANGE

  • Up to 431 bar (6,251 psig) with standard ASME class

TEMPERATURE RANGE

  • Reaching -60ºC (-76°F) cryogenic levels to 327ºC (620°F)

CAPACITY

  • Individually calculated and selected for each process application

SEAT TIGHTNESS

  • 95%

MATERIALS

  • Carbon Steel
  • Austenitic Stainless Steels

DOWNLOADS

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