The HG35 gauge valve, with a male inlet and a male outlet, meets the applications requirement for a block and bleed valve without the need for a close nipple when connecting to a female port on a gauge pressure transmitter rated to 6980 psi.

Other manufacturer's generally supply 1/2" NPT female process connections and usually include a block and bleed valve with each instrument. This usually requires a 1/2" stainless steel close nipple with each gauge pressure transmitter to accommodate the typical block and bleed valve's female outlet.

The HG65 configuration provides one less threaded connection by utilizing a male outlet for direction connection into a gauge pressure transmitter.