Model 31 Nitrogen-Purging Flowmeter


Model 31 50 psig compensated nitrogen purging flowmeter for brazing and back-purging applications. (Vac Pac)


Model 31 flowmeter allows for the low controlled flow of nitrogen gas through the copper tube to prevent oxidation. Nitrogen purging prevents contamination. The flowmeter is compensated to 50 psig. It features a brass body, sensitive needle valve for fingertip control and durable, easy-to-read, flow tube and cover. It has 1/4" SAE flare inlet and outlet connections. Must mount the flowmeter vertically for accurate reading. Conveniently vacuum-packed for point-of-purchase display.


  • Light duty nitrogen flowmeter
  • Brass body construction
  • Easy-to-read flow tube with clear cover
  • 1/4" SAE flare inlet/outlet connections
  • Vertical mounting required
  • Used for brazing and back purging applications


Warning -

Cancer and Reproductive Harm -


What's Included

  • Model 31 Nitrogen-Purging Flowmeter

Warranty Information

  • 1 Year


General Equipment

Body Brass
Compensated PSIG 50
Duty Light
Flow Capacity (SCFH) 0 - 70
Gas / Gas Service Nitrogen (N2)
Inlet Connection 1/4" - SAE Female Flare
Maximum Inlet Pressure (PSIG) 100
Outlet Connection 1/4" - SAE Male Flare


Warranty 1 Year