Model 873 High Flow Reducing Regulator
Model 873 High Flow Reducing Regulator  Model 873 High Flow Reducing Regulator 

Model 873 High Flow Reducing Regulator

  • Price:$594.00

  • 5 or more $534.60
  • 10 or more $475.20
  • 16 or more $457.38

Available Options

*The default selection shown above is generally good in stock, and can ship immediately. Choosing non-standard options may increase lead time 3-5 days.

AE Model Component Operation and Maintenance Sheets -Click to follow


Model 873 High Flow Reducing Regulator General Information

The model 873 is a piston type hand loading regulator. It utilizes a balanced poppet design for high flow and minimum effect of inlet pressure on outlet pressure. The poppet assembly is contained in a cartridge with internal filtration permitting very easy in field servicing. The low cost poppet cartridge (pictured below) is factory preassembled. It contains the more critical valving elements or the regulator thus eliminating in-field servicing problems.

The regulator is self venting but is optionally available without the vent.

This regulator design was developed for gas mixers for commercial diving where high flow, very precise pressure control and high reliability are needed. They have served this application for over forty years. It is available with different size sensing pistons resulting in a complete range of outlet pressures.

Model 873-D, a highly sensitive dome loaded version rated to 6000 PSI is also available.

Regulator Flow Charts


• Maximum inlet pressure 6000 PSI (140 MPa)
• Outlet pressure from O to:
model 873-150 . 150 PSI
model 873-400 400 PSI
model 873-1500 1500 PSI
model 873-5000 5000 PSI
model 873-D 6000 PSI

• Flow coefficient ..... 0.8 (0.23" orifice)
• Rise of outlet pressure with drop of inlet pressure 4 PSI per 1000 PSI for model 873-150
• Materials ................... body and cap - aluminum internals - brass. stainless seals - Buna N, nylon
• Fittings 1/2" NPT outlet port 1/4- NPT inlet & gauge
• Size 3 inch dia. 5 inch long


• Operation of high flow, low pressure equipment such as sirens from high pressure air tanks. Here use of high pressure air eliminates dependency on electrical power in an emergency.
• Component testing
• Air tank fill stations
• Fire fighting air systems
• Instrumentation and calibration panels
• Process industry control
• Shipboard and oft shore air and gas control
• Aircraft service equipment
• Electronic industry rare gas flow
• Vehicle CNG stations
• Precision gas mixing equipment

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