customized stainless steel and Duplex stainless steel? Air release valve with welded air vent

Designed to protect pipelines and vertical turbine pump applications from air lock and vacuum collapse,
the High-Performance Combination Air Vent Valve eliminates air and prevents vacuum formations in waterworks piping systems.
A large float clearances freely exhaust or admit air during pipeline filling or draining.A venting flange Effectively prevent the emission of toxic gases into the air.