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The Hoffman Specialty 401434 is a 75 main steam vent air valve designed for low pressure systems. This valve helps release air and non-condensable gases in steam heating applications. It features a float-type thermostatic vent designed with a one-half inch NPT female connection and a three-quarter inch NPT male straight shank. The maximum steam pressure for this valve is fifteen psi while the maximum operating pressure is three psi.
The main steam vent valve helps maintain proper system pressure and prevent water hammer.
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