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Concoa In-Line Regulators Model 304 Series

Catalog D39
Concoa In-Line Regulators Model 304 Series
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Single Stage Chrome-Plated Brass Barstock Body/316L Stainless Steel Diaphragm

The 304 Series pressure controls are designed for use with non-corrosive high purity gases in line or point of use service. The chrome-plated barstock body and 316 L stainless steel diaphragm combine to minimize dead space and eliminate inboard diffusion of unwanted substances.
Concoa’s unique Capsule® combines all the parts of a standard regulator seat into a single assembly protected by a 10 micron inlet filter providing long life and ease of maintenance.


  • Control of span and calibration gases
  • Control of non-corrosive laser gases
  • Control of high purity flushing systems
  • High purity system pressurization
  • High purity inert gas purge


Maximum Inlet Pressure: 3000 psig (20,700 kPa)
5500 psig (20,700 kPa)
Temperature Range: 0 to 120 °F (-18 °C to 48 °C)*
Gauges: 2” diameter chrome plated brass
Ports: 1/4” FNPT
Helium Leak Integrity: 1 x 10-8 scc/sec He
Cv(1000 & 2000): 0.1
Cv(3,4 & 5000): 0.2

Materials of Construction
Body: Chrome-plates brass barstock
Bonnet: Chrome-plated zinc diecast
Diaphragm: 316 L Stainless Steel
Seat: PTFE PTFE (Kel-F optional)
Filter: Sintered Bronze/10 micron size
Internal Seals: PTFE PTFE
Part No. Quantity
In Stock
3042051 INACTIVE------
3043051 DISCONTINUED------
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