P300 Small Commercial

The BelGAS P300 Series is a line of small commercial manual, direct-acting, self-operating, spring-loaded adjustable gas pressure regulators.

BelGAS gas pressure regulators

This series of regulators are for pressure reduction applications. The P300 reduces the risk of “shock” from abrupt changes of downstream conditions, which may prevent the safety equipment from shutting an operation down.

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Features & Benefits


  • Minimize sudden downstream load change
  • Wide pressure range
  • P302 has an internal relief valve for overpressure protection

Model - P300
Use - Direct Operated | 7" Diaphragm | Commercial, Industrial | Partial Relief
Max Inlet - 125 psi
Outlet Range - 3.0" WC to 8 psi | 8 ranges
Max Outlet Flow - 5,000 SCFH | Cv 8.57
Port Sizes Inches NPT -1 1/4, 1 1/2, 2 | Flanged

Flow Ratings at wide-open flow/methane

Regulator Cross Reference

The BelGAS P300, P301, P302, P303 is similar to the Itron B34S and CL31, Emerson Fisher CS400 Series (S300 obsolete), and Elster American Meter (Honeywell) 1813B2, 1800B2 and 1800CPB2, and Sensus 243-8.



  • Compressors
  • Gas engines
  • Service regulators
  • City gate/district gate/air
  • City gate/district gate/boiler pressure
  • General-purpose/high pressure
  • Steam/air/water pressure regulation