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1511 Safety Valve

Offering proven, high-performance design for low-pressure, steam heating boilers and steam generators, as well as air service applications.

  • Handles a broad range of operating conditions
  • Easy assembly and maintenance
  • Designed for low-pressure steam, steam heating boilers, and steam generators
  • Approved for use by the U.S. Coast Guard and other marine applications


  • ASME Sections I and VIII
  • ANSI Class 250
  • Inlet sizes from 1.5″ to 6″
  • Orifice sizes from H to Q
  • Pressures up to 250 psig
  • Temperatures from -20°F to 406°F
  • Blowdown 4%
  • Back pressure limit 20% of set pressure
  • Cast iron body with brass trim; stainless steel trim available