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