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MVX Manual Air Shut Off Valve


The Chalwyn MVX range of mechanically actuated diesel engine air intake shutoff valves are based on standard Chalwyn slimfit 3”, 5” and 8” butterfly valves. Suitable for both hazardous and non-hazardous area applications where valve mounted manual trip and reset controls are required. Available in basic flange mounted form or fitted with hose adaptors or an integral flame trap housing. Body and disc manufactured in corrosion resistant hard anodised aluminum with PTFE coating. Spindle and mechanism made from 316 stainless steel.  Suitable for US BOEM offshore attended installations.

Features and Benefits

  • Simple operation - instant engine shut down
  • Push or pull shut down options
  • Flange or hose mounted


  • Drilling rigs (onshore & offshore)

  • Drilling support equipment

  • Well servicing equipment

  • Refinery support equipment

  • Mining equipment

  • Generator sets

  • Work boats

  • Barges

Configure this part:


More Information


Size (in) 2.5"
Size(mm) 65
End Connection Hose Barb
Actuation Manual Push Button
Position Indication Available No
Connectors TBD
Position Indication Logic Valve Open - Switch Open
Side Left
Elbow Kit Valve Only (No Elbow)
Style Butterfly
Max Air Intake Temp (F) 257
Min Air Intake Temp (F) -40
Max Pressure (psi) TBD
IP Protection No
Hazardous Location Certification No
Power To Close or Energize To Run (Fail Safe) Power-to-Close
Reset Auto Reset