GGG50 DIN 3352 F4 Cast Iron Sluice Gate Valve , Industrial Control Valves

Cast Iron Gate Valve Pn10 Pn16 Dn 400 Gate Valve 500mm Metal industrial valve
 
Product Description
 

 
Cangzhou Junxi International Trade Co., Ltd.
Our company produce and export all kinds of carbon steel pipe fittings,Seamless Pipe Fittings, Our city Cang Zhou city is the hometown of carbon steel pipe fittings. We have exported to many countries, such as, Russia, Egypt Malaysia, India, Turkey, Indonesia, Jordan etc.
About the pipe fitting machine, we have different type for every machine.We have hot forming elbow machine, cold forming elbow machine, cold forming tee machine, beveling machine, shot blasting machine, etc.. Machine guarantee is one year. If our clients machine has problem, our after sale service person will come and help the clients solve the problem as quickly as possible.
 
About the pipe fitting machine, we have different type for every machine.We have hot forming elbow machine, cold forming elbow machine, cold forming tee machine, beveling machine, shot blasting machine, etc.. Machine guarantee is one year. If our clients machine has problem, our after sale service person will come and help the clients solve the problem as quickly as possible.
 
Use of valves
 
When gate valve is closed
The sealing surface can only rely on the medium pressure to seal, that is, rely on the medium pressure to press the sealing surface of the gate to the other side of the valve seat to ensure the sealing surface, this is self-sealing.Most gate valves are forced to seal, that is, when the valve is closed, it is necessary to rely on external force to force the gate to the valve seat to ensure the sealing surface of the sealing.
 
Open the door
When the gate height is equal to 1:1 of the valve diameter, the flow path is completely clear, but this position cannot be monitored during operation.In practice, the vertex of the valve stem is used as a sign, that is, the position of the open, as its full open position.In order to consider the temperature changes appear lock phenomenon, usually open to the apex position, and then back to the 12-1 turn, as the position of the full open valve.Therefore, the fully open position of the valve is determined by the position of the gate (i.e. the stroke).
 
Advantages of valves
 
1. Small flow resistance.The medium channel inside the valve body is straight through, the medium flows in a straight line, and the flow resistance is small.
2. Less effort when opening and closing.Compared with the globe valve, because whether it is open or closed, the direction of movement of the gate is perpendicular to the direction of flow of the medium.
3, high height, long opening and closing time.The opening and closing stroke of the gate is large, and the lowering is carried out through the screw.
4, water hammer phenomenon is not easy to produce.The reason is the long shutdown time.
5, the medium can flow in any direction to both sides, easy to install.Gate valve channels are symmetrical on both sides.
6, the length of the structure (the distance between the two connecting ends of the shell) is small.
7, the shape is simple, the structure length is short, the manufacturing technology is good, the application scope is wide.
8, Compact structure, good valve rigidity, smooth channel, small flow resistance, sealing surface made of stainless steel and hard alloy, long service life, PTFE packing.Reliable seal.The operation is light and flexible.

Working principle of gate valve

Opening and closing part of the gate valve is the gate plate, the movement direction of the gate plate is perpendicular to the direction of the fluid, the gate valve can only be fully open and fully closed, and can not be adjusted and throttled.The gate has two sealing faces. The two sealing faces of the most commonly used mode gate valve form a wedge. The wedge Angle varies with the valve parameters, usually 50, and 2°52' when the medium temperature is not high.The gate of the wedge gate valve can be made into a whole, called the rigid gate;It can also be made into a gate that can produce trace deformation to improve its technology and make up for the deviation of the sealing surface Angle in the process of processing. This gate is called elastic gate.When the gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, rely on the medium pressure to press the sealing surface of the gate to the other side of the valve seat to ensure the sealing surface, this is self-sealing.Most gate valves are forced to seal, that is, when the valve is closed, it is necessary to rely on external force to force the gate to the valve seat to ensure the sealing surface of the sealing.The gate of the gate valve moves in a straight line with the stem, called the lifting stem gate valve, also called the rising stem gate valve.Usually there are trapezoidal threads on the lifting lever, which convert the rotary motion into linear motion through the nut at the top of the valve and the guide grooves in the valve body, i.e. the operating torque into the operating thrust.When the valve is opened, the fluid passage is completely clear when the gate is lifted at a height equal to 1:1 times the valve diameter, but this position cannot be monitored during operation.In practice, the vertex of the valve stem is used as a sign, that is, the position of the open, as its full open position.In order to consider the temperature changes appear lock phenomenon, usually open to the apex position, and then back to 1/2-1 turn, as the position of the full open valve.Therefore, the fully open position of the valve is determined by the position of the gate, that is, the stroke.Some gate valves, stem nut is located on the gate plate, the hand wheel rotates to drive the stem to rotate, and the gate plate is lifted, this valve is called rotary stem gate valve or dark stem gate valve.
 

 
picture of shipment