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4200 Series

4200 Series - Steam Safety Valves
General Specifications:
Size 1” x 1/4” x 1-1/2” to 6” x 8”
Orifice Areas F (0.316 sq2) to Q Orifice (11.39 sq2)
Set Pressure Ranges 15 to 1000 psig (1.0 to 68.9 barg)
Temperature Ranges -20 to 1000°F (538°C)
Flange Classes 150# – 600#
Materials of Construction Carbon Steel
Stainless Steel
Low/High Temperature Alloy Steels
Chrome-Moly
  • Flanged Spring Loaded Boiler Safety Valve
  • Full nozzle design
  • Open bonnet design
  • One piece guide
  • Low stem bearing point
  • Temperature equalizing disc
  • Heavy stainless steel lock screw studs
  • Test Gag Optional
  • ASME/NB Section I and VIII for Steam
  • CSA B51 (Canada CRN)
  • ISO 9001- 2008
  • PED 97/23/EC (European Pressure Equipment Directive)
  • ATEX 94/9/EC (European Potentially Explosive Atmospheres)
  • CSQL (China)
  • GOST-R (Russian)
  • US Coast Guard
  • Nuclear – 10 CRF 50 Appendix B, NCA-4000, NQA-1 N285.0
  • First Point Assessment Limited
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