CONVENTIONAL CHECK VALVES

UNITED Conventional Reverse-Flow Check Valves are velocity check valves used with conventional gas lift valves that do not have integral reverse –flow check valves. These check valves protect the casing from backflow through valves that are below the working valves  and allow the application of pressure to the tubing for circulation. Reverse –flow check valves require flow to close. As the differential pressure across the check dart of the valve increases, the dart contacts the soft seat  and then the hard seat to form a seal and close the check valve. Features: Made of corrosion resistant material. Dual seats, one metal to metal and one metal to Buna-N. Inconel spring loaded drop providing a normally closed check. Heat treated stainless steel drop with a large flow bypass.

Licence No.API 5CT-0565
Licence No.API 5L-0424
Licnece No.API 11V1-0014
Licence No. API-7-0393
Licence No.API-7-1-0393

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