The Mark 128 PQC Control Valves are single port valves with an unbalanced stem-guided valve plug and push down to close valve plug action. Operated by a Mark 128 spring and diaphragm actuator, the assembly can be operated in a normally open or normally closed application.
Design and Manufacturing Standards
- Sizes : 1″
- Pressure Classes : 3600 psi @ 100oF
- End Connections : NPT
- Body Materials : WCB
- Flow Characteristics : Quick Opening with a 45o taper plug
- Shutoff : Class IV