Through-Conduit Expanding Gate Valve

The Calvary C1-EX expanding gate valve is designed for critical service in the pipeline oil & natural gas wellhead applications along with corrosive or erosive services throughout the energy, oil, and gas industries.

All models of the C1-EX expanding gate valves are manufactured per the latest edition of API 6D requirements. The movement of the parallel expanding gate and segment provides a bubble tight mechanical seal. This movement assures positive shut-off while reducing wear between the sealing surfaces and extending the life of the valve. The mechanical seal provides a superior valve for demanding applications; including those requiring zero-leakage in Double Block and Bleed service. The valves are designed for easy in line service to be performed through the top entry access.

Sizes:  2” thru 36”
Pressure Classes:  
150, 300, 600, 900, 1500
Operating Temperatures:    
-50F to +850F (-46C to +454C)

 Available End Connections:

  • Raised Face Flange
  • Ring Joint Flange
  • Weld End Connection
  • Flange By Weld End Connection

Features Include:

  • Through Conduit
  • Double Block And Bleed Valve Body
  • Cast Steel Construction
  • Low Temp
  • NACE
  • Positive (Bubble Tight) Closure
  • Mechanical Sealing/Operation
  • External Thermal Body Relief
  • Pigable
  • Secondary Seat Sealant Injection Ports
  • Closed Packing System Energized With Injectable Packing
  • Fire Safe Design
  • ISO5211 Mounting Pad For Actuator Or Gear Operator
  • Field Repairable In Line
  • Extensions and Adaption for Actuation Available

Click here to download PDF for technical information.

updated 2021-01-07