Parallel Slide Gate Valve Vs Wedge Gate Valve

Two discs and just one wedge design gate valve.

Parallel slide gate valve vs wedge gate valve.

Gate valves use a gate or a wedge whilst butterfly valves use a rotating disc to allow or prevent fluid flow. Velan pressure seal parallel slide gate valves are ideal for clean service and steam. Consequently these components must be made of metals which do not gall or tear when in sliding contact with each other. 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. Velan s proven pressure seal design. This design of gate valve is commonly used for clean fluids and steam applications. 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. You can see the same in images. The closing is only made over one of the seats. Bolted bonnet gate valve screwed bonnet gate valve pressure seal bonnet and.

Unique parallel slide forged cage unit design comprises all operating parts of the slide discs. 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. Split wedge or parallel disks gate valve.

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. 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. Weir valves controls usa inc. 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.

Gate valve body bonnet designs. System pressure is used to provide isolation. 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 valves double disk.