Compact Twin Stage Regulators
LV404B4 and LV404B9 Series


This compact two-stage regulator is designed to reduce container pressure down to 11” w.c. delivery pressure. It is ideal for “on-site” cylinder applications, mobile homes and average domestic service including small ASME and 100 to 420 pound DOT cylinders.


  • Incorporates integral relief valve.
  • With 15 PSIG inlet pressure, regulator is designed to not pass more than 2 PSIG with the seat disc removed.
  • Large vent helps prevent blockage and has ¾” F. NPT for vent piping.
  • Compact size allows for easy installation — especially under container hoods and within collars.
  • Vent on the first stage is consistently in the down position.
  • Built in pressure taps on both first and second stage regulators have plugged ⅛” F.NPT outlets. Plugs can be removed with a 3⁄16” hex allen wrench.
  • Select brown finish.


Body (First Stage) Zinc or Brass
Body (Second Stage) Die Cast Zinc
Nozzle Orifice Brass
Spring Steel
Valve Seat Disc Resilient Rubber
Diaphragm Integrated Fabric and Synthetic Rubber