High Pressure First Stage Regulator LV4403SR and TR Series  



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  • Incorporate integral relief valves for added system protection.
  • Large vent helps prevent blockage and has 3/4" FNPT thread for vent piping.
  • Bonnet vent positioned over outlet to avoid icing and contamination by foreign material.
  • Unique bonnet vent profile designed to minimize vent freeze over when properly installed.
  • Replaceable valve orifice and valve seat disc.
  • Straight-line valve closure reduces wear on seat disc.
  • Large molded diaphragm is extra sensitive to pressure changes.
  • Built in pressure tap has plugged 1/8" F.NPT outlet.
    Plug can be removed with a 3/16" hex allen wrench.
  • Extra long lever arm provides uniform delivery pressure.
  • Brilliant red finish.


Provides accurate first stage regulation in two-stage bulk tank systems. Reduce tank pressure to an intermediate pressure of 5 to 10 PSIG. Also used to supply high pressure burners for applications like industrial furnaces or boilers. Also incorporated in multiple cylinder installations.
  RegO LV4403SR & TR Series  
  DMC Gas Equipment Limited  
  Unit 11, 11/F, Tower One,
Ever Gain Plaza,
88 Container Port Road,
Kwai Chung, NT, Hong Kong
  TEL: +852 2851-2121
FAX: +852 2851-2129

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