Gate valves open by lifting a round or rectangular gate (or wedge) out from the path on the fluid. The sealing surfaces relating to the gate and seats are planar, so gate valves at stvvalves will often be used any time a straight-line flow of fluid and minimum restriction should be used. They have a flat gate closure that slides out and in or around between two parallel plates to start or close the valve. Gate valves can be used shut-off, as an alternative to flow regulation given that they only have two settings: on / off.

While a knife gate valve performs the same manner the name implies. These types of valve were originally suitable for the pulp and paper industry. Stringy pulp would impinge between wedge and seat of your normal gate valve which will help prevent flow shut-off. Knife gate valves were designed that has a sharp edge to take through the pulp and seal. With this type of useful attribute, the knife gate valve has grown to be invaluable in applications involving slurry, viscous fluids as well as other systems where impingement is a dilemma.

Butterfly valve disk: The disk is when the valve stops flow – it truly is equivalent to a enter a plug valve, a gate within a gate valve or even a ball inside a ball valve. There are variations in disk design and orientation so as to improve flow, sealing and/or operating torque.

Butterfly valve Stem: The stem on the butterfly valve can be a one-piece shaft or even a two-piece (split-stem) design. The stem in the majority of resilient seated designs is protected from your media, thus allowing a powerful selection of material for cost and mechanical properties.

Butterfly valve Seat: The seat of the resilient-seat butterfly valve utilises an interference fit involving the disk edge along with the seat to produce shutoff. The material on the seat can be done from a variety of elastomers or polymers. The seat could possibly be bonded for the body or it can be pressed or kept in.

Gate valves could be divided into two main types: Parallel and wedge-shaped. The parallel gate valves make use of a flat gate between two parallel seats, plus a popular type may be the knife gate valve designed that has a sharp edge over the bottom from the gate. The wedge-shaped gate valves use two inclined seats along with a slightly mismatched inclined gate.

Most of AVK's gate valves are from the solid wedge-shaped design, but we also offer knife gate valves for wastewater treatment and parallel slide valves for gas supply.