Gate Valve Wedge Types

A gate valve can be defined as a type of valve that used a gate or wedge type disk and the disk moves perpendicular to flow to start or stop the fluid flow in piping.

Gate valve wedge types.

Pressure binding sometimes in high temperature applications the flow medium such as water or steam is trapped in the valve bonnet area when the valve is closed for system shutdown. The purpose of the wedge shape is to introduce a high supplementary seating load. Split wedge gate valve. Scv valve manufactures superior cast body bolted bonnet os y gate valves in a variety of materials trims packing types sizes 2 thru 48 and pressure classes 150 thru 2500.

Split wedge or flexible wedge type gate valves are expected to perform better than solid wedge gate valves when thermal binding is a concern. The mechanical characteristics make the scv wedge gate valve are ideal for bi directional total flow system open shut off applications with minimal. Gate valves are usually divided into two types. Wedge type gate valves have a disc that is in the shape of a wedge that seats against two inclined seats.

Split wedge discs are more flexible and may be used where pipeline strains may distort the valve seats. Solid wedges are used in high flow or turbulent applications such as steam service. In such a design a wedge slides cross a general passageway in order to control fluid flow like a sliding gate hence the name. Solid wedge gate valve can be installed in any position suitable for almost all fluids and practical for turbulent flow services.

A gate valve is the most common type of valve used in any process plant. The disc is free to adjust itself to the seating surface if one half of the disc is slightly out of alignment due to some foreign matter lodged between the disc and the seat ring. In general the two wedge gate valve sealing surface and the angle of the vertical center line of 2 52 3 30 5 8 and so on. Shut off is obtained by the free floating seat or disk gate allow the upstream pressure to seal the seat and disk against any unwanted seat leakage.

Description of wedge gate valve. Split wedge gate valves are self adjusting and self aligning gate valves. A gate valve is a valve that opens by lifting a barrier gate out of the path of the fluid gate valves require very little space along the pipe axis and hardly restrict the flow of fluid when the gate is fully opened. Gate globe check valves gate valves gate valves serve as efficient on off valves with flow in either direction.

The parallel gate valve uses a flat disc gate between two parallel seats upstream and downstream. The gate faces can be parallel but are most commonly wedge shaped in order to be able to apply pressure on the sealing surface. Wedge gate valves are named because the two sealing surfaces resemble wedges in the body. One of the most significant characteristics of this type of valves is its.

Solid design also minimized the vibration and chatter. The solid or single wedge gate valve is the most widely used and the lowest cost used type in the process industry.