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455 Series Regulator

Four-port, electroless nickel-plated forged brass, single stage regulator for highly corrosive gas applications
4552332-01-330 shown

The 455 Series regulator provides primary pressure control of highly corrosive gases such as chlorides, sulfides, and other acid-forming gases. CONCOA strongly recommends using a deep purge assembly with the 455 Series regulator to prevent introducing moisture into the process gas stream, which could form acids and eventually lead to corrosion. The 455 Series regulator features a Dursan® capsule and diaphragm. This proprietary amorphous silicon oxide finish offers significantly more corrosion resistance than 316L stainless steel and exotic metals such as Hastelloy®. For fluorine service, CONCOA passivates the regulator with a stainless steel CAPSULE® and diaphragm as a complete assembly with all peripherals.

  • Dursan internals provide superior corrosion resistance
  • CAPSULE seat design features integral 360° filtration
  • Captured vent prevents exposure in the unlikely event of diaphragm failure
  • Spectometric helium leak check verifies leak integrity
  • Max inlet pressure (bare body): 3000 PSIG (210 BAR)
  • Body: Electroless nickel-plated forged brass
  • Bonnet: Electroless nickel-plated forged brass
  • Gauges: 2 1/2 in (68 mm) diameter Monel®
  • Seat: PTFE
  • Nozzle: 316L stainless steel (passivated); Dursan (non-passivated)
  • Filter: Patented 10-micron 316 stainless steel mesh (passivated); 10-micron Dursan mesh (non-passivated)
  • Temperature range: -40°F to 140°F (-40°C to 60°C)
  • Diaphragm: 316L stainless steel (passivated) or Dursan (non-passivated)
  • Cv: 0.1
  • Helium leak integrity: 1 x 10⁻⁸ scc/sec
  • Diaphragm seal: PTFE
  • Ports (bare body): 1/4 in FNPT
  • Conformances: Cleanliness meets or exceeds CGA G-4.1; ANSI/ASME B40.1; PED 2014/68/EU; CRN OH5216
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ID Number
455 Series Regulators Catalog Page
Regulators Installation and Operation
English, Spanish, French
CRN File OH5216

WARNING: This product can expose you to chemicals including Lead, Chromium, Nickel, and 1-3 Butadiene, which are known to the state of California to cause cancer, birth defects, or other reproductive harm. And, this product can expose you to chemicals including Bisphenol A (BPA) which is known to the State of California to cause female reproductive harm. For more information go to www.

Dursan® is a registered trademark of SilcoTek Corporation; Monel® is a registered trademark of Huntington Alloys Corporation; CAPSULE® is a registered trademark of Controls Corporation of America; Hastelloy is a registered trademark of Haynes Int., Inc.