Control Valve Suitable for On-Off Dump Valve Service

The Mark 128PQC Series Control Valve body assembly is suitable for on-off dump valve service in oil and gas production applications, in either sweet or sour gas conditions. This valve is also useful for on-off high-pressure control of numerous gasses and liquids, and can be used with materials that are viscous or erosive.

Features & Benefits
  • 1″ screwed end connections
  • Quick opening flow characteristic
  • Can be converted from straight through flow to angle flow
  • Field reversible multi-spring actuator
  • Stem guided valve plug
  • Sour service capability: optional NACE MRO 175/ISO 15156-2009
  • Tight shutoff
Specifications
  • Sizes: 1″
  • End Connections: NPT
  • Body Materials: WCB
  • Trim Materials: 316
  • Seats: Metal, Soft-seat, Cageless-soft seat
  • Shutoff: Class IV
  • Maximum Inlet Pressures and Temperatures: 3600 psi @ 100°F; 3520 psi @ 180°F
  • Flow Characteristics: Quick opening with a 45° taper plug
  • Flow Direction: Either direction

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