Parallel Slide Gate Valve Vs Wedge Gate Valve

By comparison a double disc wedge gate valve relies upon torque force to wedge the disc into the valve body to provide shut off.

Parallel slide gate valve vs wedge gate valve.

Velan pressure seal parallel slide gate valves are ideal for clean service and steam. This design of gate valve is commonly used for clean fluids and steam applications. Wedge gate valve our parallel slide gate valve design offers many advantages over double disc wedge gate valves in providing tight reliable shut off in water and steam service. Parallel slide gate valves double disk.

In case one half of the disk is out of alignment. Moreover gate valves and butterfly valves have different body and disc designs as stated below. Bolted bonnet gate valve screwed bonnet gate valve pressure seal bonnet and. Unlike the wedge in a wedge gate valve which only comes into contact nearly closed each disc in the parallel seat valve slides against its seat while the valve is being opened or closed.

Consequently these components must be made of metals which do not gall or tear when in sliding contact with each other. System pressure is used to provide isolation. Gate valve body bonnet designs. Our parallel slide gate valve uses position seating allowing the line force in the system to assist in the sealing of the valve seat by holding the downstream disc firmly against the downstream seat.

The parallel slide gate valves are mainly used in the field chemical petroleum natural gas designed to provide isolation and transmission of flow in a piping system or a component when closed sometimes can be installed in the pump outlet for regulating or control of flow. The split disk can be in a wedge shape or a parallel disk type. Two discs and just one wedge design gate valve. Split wedge disk consists of two solid pieces and holds together with the help of a special mechanism.

The closing is only made over one of the seats. Velan s proven pressure seal design. Unique parallel slide forged cage unit design comprises all operating parts of the slide discs. Gate valves use a gate or a wedge whilst butterfly valves use a rotating disc to allow or prevent fluid flow.

Split wedge or parallel disks gate valve. Providing tight shutoff under the most severe conditions this exclusive disk and wedge design resists effects of extreme temperatures gross thermal transients high and low differential pressures and dual phase fluids. 29 old right road ipswich ma 01938 usa t 1 978 744 5690 f 1 978 741 3626 www global weir comparison parallel slide gate valve vs. The disk is free to adjust itself to the seating surface.