Advantages of the gate valve

 As far as we are concerned that the gate valves have many advantages. Do you know what about the specific andvantages? The following i will share to you.
1, the flow resistance is small. Valve body media channel is through, the media into a straight flow, the flow resistance is small.
2, opening and closing more effort. Compared with the cut-off valve, because whether open or closed, the direction of movement of the gate are perpendicular to the direction of flow of the media.
3, height, long opening and closing time. The opening and closing stroke of the gate is large, and the lift is carried out by screw.
4, water hammer phenomenon is not easy to produce. The reason is that the closure time is long.

We also supply globe valve and check valve, if you need, welcome to contact us.

Self-sealing of the Gate Valves

 Gate valve opening and closing parts is the gate, the direction of movement of the gate and the fluid direction perpendicular to the gate valve can only be fully open and fully closed, can not be adjusted and throttling. The gate has two sealing surfaces, the two most commonly used mode gate valve sealing surface of the wedge, wedge angle with the valve parameters vary, usually 5 .
Wedge gate valve can be made into a whole, called the rigid gate; can also be made to produce a trace of the deformation of the gate to improve its craft, to make up the sealing surface angle in the processing of the deviation, Plate is called elastic gate. When the gate valve is closed, the sealing surface can only be sealed by the medium pressure, that is, by means of the medium pressure to press the sealing surface of the gate to the other side of the valve seat to ensure that the sealing surface of the seal, which is self-sealing. Most of the gate valve is forced to seal, that is, when the valve is closed, to rely on external force forced to the gate pressure to the valve seat to ensure that the sealing surface of the seal.
We supply gate valve and globe valve,If you need, welcome to contact us.

The type of Gate Valves

Gate Valve is the closing part along the vertical direction of the center line of the valve.It mainly composed by the valve body, bonnet,stem.gate, sealing filler and drive device and other components, both ends of the valve body with a flange or thread connected to the formation of media channels. Gate valve in the pipeline for the main cut off. Gate valve is a very wide use of a valve, the general diameter DN ≥ 50mm cutting device are used it, sometimes small diameter cut device also use the gate valve.Gate valve has parallel gate valve and wedge gate valve.

We also globe valve and check valve, if you need, welcome to contact us.

Provisions for the Use of Cast Iron Valves

  The application of cast iron valves is as follows:

 

(1) When the nominal pressure PN is less than or equal to 1.0MPa, the working temperature is 10 to 200 DEG C, the working medium is water, water, steam, air, gas, oil etc., usually choose brand HT200, HT250, HT300, gray cast iron valve HT350.

(2) As for the nominal pressure PN is less than or equal to 2.5MPa, the working temperature is 30 to 300 DEG C, the working medium is water, water, steam, air, gas, oil etc., usually choose brand KTH300-06, KTH330-08, malleable iron valve KTH350-10.

(3) As for the nominal pressure PN is less than or equal to 4.0MPa, the working temperature is 30 to 350 DEG C, the working medium is water, water, steam, air, gas, oil etc., usually choose brand QT400-15, QT450-10, ductile iron valve QT500-7.

We are China Cast Iron Gate Valve Manufacturer with good quality.