The
gate valves provided by Weldon mainly include bolted bonnet wedge gate valves and pressure seal bonnet gate valves, which are widely used in gas, petrochemical, oil, offshore, power station and refining industries. The opening and closing of the
gate valve depend on the movement of the disk perpendicular to the direction of the fluid, which is usually used to cut off the medium and cannot be used to regulate the flow.
Gate valve is usually divided into rising stem gate valves and nor-rising stem gate valves. The rising stem gate valves is widely used due to easy lubricate and observe, the nor-rising stem gate valves remains at the same height during the opening and closing process, it is suitable for installation where the space is limited.
Gate Valve Design Features:
Disc: flexible wedge by default, solid wedge can be provided upon request.
Seat: Renewable seat and non-renewable seat are both available.
Body - Bonnet Connection: Bolted bonnet (BB) is normally applied on CL150 - CL1500, body bonnet seal is defaulted by gasket and RTJ ring. Pressure seal bonnet is applied on CL1500 - CL2500 with pressure seal ring for connection between body and bonnet.
Packing: graphite packing by default, PTFE packing on corrosive media. API 622 fugitive emission packing can be available upon request.
Back seat: Renewable back seat is applied on carbon steel and low alloy steel valve, integral back seat is applied for stainless steel valve.
Actuation: Hand wheel and gear box are normally designed for cast gate valve based on different size and pressure rating; Electric, pneumatic or Chain wheel operation can be provided upon request.
Product Range:
Size: 2" - 60" (DN50 - DN1500)
Pressure Rating: Class 150 LB - 2500 LB (PN16 - PN420).
Material: Carbon steel, Stainless steel, Alloy steel, including WCB、GS-C25、LCB、LCC、LC1、LC3、CF8、CF8M、CF3、CF3M、WC6、C5、C9、C12、4A、5A、MONEL、ALLOY20、C95800.
Connection End: BW, RTJ, Flanged.
Operation: Handwheel, Gearbox, Electric, Pneumatic.
Design & Manufacture Standard: API 600, ASME B16.34, DIN 3352, EN 1984, Bolted bonnet, pressure bonnet, bellow seal bonnet, high / low temperature extended bonnet and ISO 15848 fugitive emission designed valves are available upon different request of services.
Test Standard: API 598, EN 12266.