Parallel Slide Gate Valve Vs Wedge Gate Valve

Parallel slide gate valves double disk.

Parallel slide gate valve vs wedge gate valve.

Split wedge disk consists of two solid pieces and holds together with the help of a special mechanism. Split wedge or parallel disks gate valve. Gate valves use a gate or a wedge whilst butterfly valves use a rotating disc to allow or prevent fluid flow. 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 closing is only made over one of the seats. 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. In case one half of the disk is out of alignment. Gate valve body bonnet designs.

Velan s proven pressure seal design. Bolted bonnet gate valve screwed bonnet gate valve pressure seal bonnet and. You can see the same in images. 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.

Parallel slide gate valve provides a smooth flow path between seats. This design of gate valve is commonly used for clean fluids and steam applications. Moreover gate valves and butterfly valves have different body and disc designs as stated below. System pressure is used to provide isolation.

Velan pressure seal parallel slide gate valves are ideal for clean service and steam. The split disk can be in a wedge shape or a parallel disk type. The disk is free to adjust itself to the seating surface. Consequently these components must be made of metals which do not gall or tear when in sliding contact with each other.

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. By comparison a double disc wedge gate valve relies upon torque force to wedge the disc into the valve body to provide shut off. Unique parallel slide forged cage unit design comprises all operating parts of the slide discs. Weir valves controls usa inc.