Three-Way, Bypass or Mixing

The Mark 79 is a pneumatic three-way valve for use in either bypass or mixing service. The Mark 79 utilizes the unique sliding gate trim design to provide excellent control with superior longevity. Each valve contains two sets of sliding gate seats connected to a common valve stem for synchronized movement, whether in by-pass or mixing mode.

Features & Benefits
  • Totally enclosed multi-spring actuator minimizes deadband
  • Multi-spring actuator can be configured to accept a 3-15 psi signal or other control ranges on request
  • Available with a top-mounted or side mounted positioner

Sizes: 1-1/2″ & 2″ (DN40 & DN50)

Body Material: Carbon Steel, Stainless Steel

End Connection: Flanged, Threaded

Cv (Kv): up to 30 (up to 26)

Trim Material: Carbon Steel, Stainless Steel

Control Ranges: 3-15 psi (0,2-1 bar); others upon request


Benefits of the Sliding Gate

Read on to learn the benefits of owning sliding gate regulators and control valves.

Sliding Gate Valve Overview

Watch this video for an overview of Sliding Gate Pressure Regulators and Control Valves

Sliding Gate Videos

Learn more about the sliding gate seat design by watching these videos.


CRN Number
Mark 79/79MX: 1-1/2″, 2″, 3″

ATEX Certified

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