DUNGS FRG - Ratio Regulator & Zero Governor (US/CA)

The DUNGS FRG is a spring-loaded gas pressure regulator used in industrial and commercial heating applications. As a ratio regulator, it maintains a constant gas/air ratio during burner turndown. As a zero governor, it reduces incoming gas pressure to zero or slightly above/below atmospheric pressure. It is suitable for dry natural gas, propane, butane, air, and inert gases.

The DUNGS FRG/6 series is available in pipe thread sizes from 1/2 in. NPT to 3 in. NPT. Maximum operating pressure is 7 PSI (500 mbar) factory rating, 5 PSI (350 mbar) CSA certified. Optimal inlet pressure range for ratio regulator is 3 to 82 in. W.C. (7 to 200 mbar). Output pressure range is 0 to 60 in. W.C. (0 to 150 mbar). CSA certified to ANSI Z21.18 / CSA 6.3.

3G Electric supplies the DUNGS FRG ratio regulator and zero governor to customers in Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact our team for a quotation and lead time on your required model and pipe size. We source genuine DUNGS components for industrial gas train applications.

Install the DUNGS FRG in accordance with NFPA 86, ANSI Z83.4, and local codes. Connect the air impulse line to maintain proper gas/air ratio control. Use the 1/4 in. NPT test ports on each side for pressure measurement. The factory-installed vent limiter is standard; review applicable codes for vent line requirements. Ensure the regulator is oriented correctly for spring-loaded operation.