ASME SECTION VIII FOR AIR-GAS-STEAM OR LIQUID SERVICE


ASME UV  NB   CE CRN

Series 740 safety and relief valve is designed for accuracy and reliability. Engineered for heavy-duty industrial usage. Multiple purpose pressure relief valve for all services: Liquid, Steam and Air/Gas. ASME and National Board Certified for Section VIII service as well as CE and CRN certifications. Pressures are to 1500 PSI. Available with a full array of metal seating options.

Series 740

Brass nozzle, stainless steel ring, disc and springs. Brass / bronze body, bonnet.
300 PSI (20.7 Bar) for air/gas and liquid, 250 PSI (17.2 Bar) for steam.
Temperatures -320°F (-196°C) to 406°F (208°C)

Series 741

Stainless steel nozzle, ring, disc and springs. Brass / bronze body, bonnet.
1500 PSI (103.4 Bar) for air/gas and liquid, 300 PSI (20.7 Bar) for steam.
Temperatures -320°F (-196°C) to 425°F (218°C)

Series 742

Stainless steel nozzle, ring, disc, all internals and springs. Carbon steel body, bonnet.
1500 PSI (103.4 Bar) for air/gas and liquid, 300 PSI (20.7 Bar) for steam.
Temperatures -20°F (-29°C) to 800°F (427°C)

Series 743

Stainless steel nozzle, ring, disc, all internals and springs. Stainless steel body, bonnet.
1500 PSI (103.4 Bar) for air/gas and liquid, 300 PSI (20.7 Bar) for steam.
Temperatures -320°F (-196°C) to 800°F (427°C)


Usages:

Pressure Vessels, Pumps, Hydraulics, Tanks, Steam Systems, Chemical, Cryogenic, Air and Gas Compressors, Separators, by-pass and over pressure protection. Choose for most industrial applications requiring a safety relief valve.


Features:

  • Full nozzle - top guided design
  • Short, precise blow-down
  • Wide choice of inlet/outlet sizes
  • Excellent re-seating characteristics
  • Designed for heavy industrial use
  • Closed hex cap
  • Back pressure tight
  • Drain hole with threaded plug
  • Cryogenic Compatible

Flange


Options:

  • Lap Joint Flanges
  • O-ring seating options (see charts)
  • Packed lift lever
  • Open lift lever
  • BSPT piping
  • Tri-Clamp inlets
  • Full array of metal options
  • O2 Cleaning
  • API 527 Seating

 





 

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