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312 Series Regulator

Five-port, chrome-plated brass barstock, dual stage cylinder regulator for high purity inert gas applications
3123331-01-580 shown

The 312 Series regulator provides primary pressure control for non-corrosive, high purity (up to grade 5.5), or liquefied gases. Two stages of pressure regulation minimize pressure variation arising from inlet pressure changes, such as the depletion of the supply cylinder, making the 312 Series regulator ideal for applications where constant delivery pressure is critical. Available with a variety of options installed at the factory, the 312 Series regulator may be configured as a single station manifold with or without purge, low-pressure alarm, or multiple inlets.

  • 316L stainless steel diaphragm prevents inboard diffusion
  • CAPSULE® seat design features integral 360° filtration in both stages
  • Spectometric helium leak check verifies leak integrity
  • Max inlet pressure (bare body): 3000 PSIG (210 BAR); 3500 PSIG (240 BAR) optional; or 4500 PSIG (310 BAR) optional
  • Body: Chrome-plated brass barstock
  • Bonnet: Chrome-plated, die-cast zinc
  • Gauges: 2 in (50 mm) diameter plated case
  • Seat: PCTFE (first stage); PTFE (second stage)
  • Filter: 10-micron sintered bronze
  • Temperature range: -40°F to 140°F (-40°C to 60°C)
  • Diaphragm: 316L stainless steel
  • Cv: 0.1
  • Helium leak integrity: 1 x 10⁻⁸ scc/sec
  • Internal seals: 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
312 Series Regulators Catalog Page
Regulators Installation and Operation
English, Spanish, French
CONCOA Scientific Research Apparatus Brochure
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.

CAPSULE® is a registered trademark of Controls Corporation of America