Type 51 Stainless Steel Regulators and Filters NACE

Type 51 Stainless Steel Regulators and Filters NACE from Marsh Bellofram Corporation.

The Type 51SS regulator is designed for service with a variety of corrosive gases and environments and comply with NACE MR-01-75.  Special construction includes 316 stainless steel housing and filter assemblies, with fluorocarbon elastomers used for the control diaphragm and the supply valve.

These corrosion resistant materials are compatible with sour gas and for use in off-shore environments. Typical applications include petrochemical processing, chemical plants, food processing and paper/pulp mills. This ruggedly built regulator operates in pressure ranges up to 150 psig (10.3 BAR). The Type 51SSFR and Type 51SSAR Regulators and the Type 51SSF and Type 51SSAF filter assemblies have built-in dripwells which trap water, oil and other contaminants. The contaminants are easily flushed out of the dripwell via a convenient manual or automatic drain valve. The 40-48 Micron Filter is constructed of sintered 316 stainless steel, and is easily removed.

The Type 51SS products can be through-panel mounted with the mounting nut supplied (regulators only), bracket-mounted using the optional bracket (regulators only), or pipe mounted by its ports (regulators and filters). The regulators and filter assemblies comply with NACE material requirement #MR-01-75 for sulfide stress cracking resistant metallic material for oil field equipment.



  • Ideal for sour gas and corrosive applications or environments
  • Excellent stability and repeatability
  • Low droop
  • Tapped vent for exhaust gas capture
  • Built-in filter assemblies and dripwells
  • Manual or automatic drain options
  • Filter only assemblies available
  • Panel, bracket or pipe mounting
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