Safety Valves

KNG573 ASME Code Safety Relief Valve

The KNG573 is a high capacity safety valve used for boilers, piping lines and vessel protection. Designed and engineered for heavy-duty industrial use. ASME and National Board Certified for Section XIII as well as CE and CRN Certifications. Same as Series 570 except with Stainless Steel wetted trimming (Nozzle and Disc), Set pressure for air and steam up to 300 PSI (20.7 Bar) Features:
  • Designed for durability
  • 5 orifices – 12 sizes of piping options
  • Top guided seating and discharge
  • Full nozzle, high capacity levels
  • Short, tuned blow-down with dual-ring technology
  • Heavy duty hood and lever mechanism
  • Standard 17-7 stainless steel springs

Captured Exhaust


1/2", 3/4", 1", 1 1/4", 1 1/2", 2", 2 1/2"

Pressure Range

1 – 300 PSI

Temperature Range

-20°F to 425°F


Brass, Stainless Steel


Air, Gas, Steam


Canadian Registration Number (CRN), CE, National Board/ASME Section XIII


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