Stop Valves Contact a Tech (888) 313-5609 OR Request A Quote Ball valve QHStop valve, manually operatedIn-line installationInternal thread at both ends Piloted non return valve HGLValve function: piloted non-return functionPneumatically pilotedScrew-in with external thread Quick exhaust valve SE, SEUValve function: quick exhaustStop valve, pilotedScrew-in Logic Component ZKDual-pressure valveConnects two input signals in the AND functionMounting via through-holesCatalogs & Resources Ball Valves - QH Check Valves - HGL Quick Exhaust - SE - SEU Logic Component - ZK