Gate Valves
Knife gate valves PA 520 |
Knife gate valves PA 540 |
Gate valve is a kind of shut-off industrial valve, the locking element which moves perpendicular to the axis of flow of the working medium. Their application area is very wide and includes oil, gas, chemical, power and many other industries, as well as the system of communal sector. Gate valves are installed almost at all technological and transportation pipelines with diameters from 15 to 2000 mm, with pressure up to 25 MPa and temperature of working medium up to +565°C.
There are several types of valves that differ in their design:
Wedge gate valve is the most common. The surfaces of this valves shutters form an acute angle - wedge.
Parallel gate valve – surfaces of the locking element are parallel to each other.
Knife gate valve manufactured by "Promarm" – in such gate valves shutter's function performs a metal knife which can cut through mechanical fractions in the working medium.
Knife gate valves for magistral pipelines – designed for use as locking devices on magistral oil and oil product pipelines. The diameter of the pipe from 300 to 1200 mm.
Knife gate valves for Christmas tree assembly is differ full leakproofness of the closure due to the constant preload saddles and having charge and discharge valves.
Gate valves with rubber wedge is a wedge valve, the wedge of which is covered with soft polymer seal that provides a high tightness and reduced torque when opening and closing.
Pinch valve. In such valve impact on the flow of the working medium is carried out by compression of the elastic hose (pipe).
Gate valve with rising stem. In the opening spindle (stem) valve moves forward, and comes out of the body.
Gate valve with non rising stem. At the time of opening spindle (stem) rotates inside the body, not comes out.
According to the method of manufacture gate valves could be:
Cast – the main parts (body, cover, wedge) gate valve made by casting. The most part of gate valves is manufactured in this way.
Forged is made by machining workpiece – forging. This way made gate valves with small diameters and large pressure.
Stamped – the details of such valves are stamped and then welded together. In comparison with cast and Forged gate valves this type have smaller dimensions and weight. Disadvantages are a small working pressure and poor tightness.
Operating of the valves is a manual (handwheel or gearbox) or with the electric actuator, refer to the "Electric operated gate valves". Rarely used hydraulic and pneumatic actuators.
Underground installation of gate valves management is possible with floor stand extension.
To view the specifications of interested products you can click on one of these links: 30с941нж, 30с41нж-хл, 30с15нж, 30с64нж, 30с76нж, 30нж41нж, 30с964нж, 30с541нж, 30с15нж-хл, 30с564нж, 30с941нж-хл, 30с927нж, 30с76нж-хл, 31лс77нж, 30с42нж, 30с515нж, 30с947нж or use the filter in the catalog.
Gate valves supplied on objects AK Transneft must satisfy all special requirements: ОТТ-23.060.30-КТН-246-08 – knife gate valves; ОТТ-75.180.00-КТН-164-10 (ОТТ-75.180.00-КТН-272-06) – Gate valves.
