Double Disc Gate Valve Manufacturer in India
A double disc gate valve uses two separate discs to establish seating against the valve body, making the design suitable for demanding isolation duties where reliable sealing from either pipeline direction is required. Speciality Valve manufactures and offers double disc gate valves for hydrocarbon transmission, high-pressure process headers, gas transportation and critical pipeline isolation, with the gate and seating arrangement determined by service requirements.
Double Disc Gate Valve Configuration:
Material Selection:
Body and pressure-containing materials are selected according to operating temperature, pressure, corrosion conditions and mechanical requirements.
Double Disc Gate Valve Grades:
Final grade selection should follow the pressure-temperature envelope and fluid compatibility requirements.
Parallel Disc Seating and Isolation:
The two discs move toward their respective seats during closure. This arrangement can provide sealing on both sides of the valve when correctly designed and installed.
The cavity between the discs also requires consideration. Depending on the valve design and service, body-cavity pressure relief, bleed or pressure-management arrangements may be required as part of the isolation philosophy.
Gate and Trim Arrangements:
Pipeline Connection and Rating Details:
Applications for Double Disc Isolation:
Crude-oil transmission pipelines
Natural-gas transportation
Pipeline compressor stations
Hydrocarbon storage terminals
High-pressure process headers
Gas-processing installations
Transmission-line block valve stations
Bidirectional pipeline isolation
Testing and Project Records:
Inspection can include material verification, dimensional checks, shell testing, seat testing and operational verification. Project documentation may include material certificates, drawings, pressure-test records and inspection documentation according to the approved specification.
For a double disc gate valve requirement, the line size, pressure class, medium, temperature, flow direction and required isolation philosophy should be established before finalising the disc, seat and pressure-management arrangement.
