Gate valve is a fairly common type of valves used in the hydraulic system. True to its name, such as a gate valve (the gate) open for the flow to pass through and closed when you want to stop the flow. Gate Valves are widely used in fluid-handing systems for flow control. Gate valves are designed to be fully opened or closed. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss.

Anatomy of valves:
 
The link type of valve:

- Links with flange: This is the most common form of link by including a flange formed at the 2 ends of the valve. We could use more steel outer flange to connect pipes with valves in the bolts, using washers inserted between to ensure the fit, avoid water leakage.
 
In addition, we have some other method such as assembling threaded joints, joined by key, overlapping welding ...
Gate valves:

We have all kinds of valves made from stainless steel, cast iron, copper, divided into 3 main types:
- Valve gates stand firm
- Valve door sink company
- Knife gate valves
 
* Note :
During the operation, the control valves, valve motion generates friction, plus the force of the flow would cause abrasion of the contacts, in the long run will no longer ensure tight snugly when the valve is closed. Besides, in the valve structure is paired with many different components often get stuck or deposited impurities cause problems, so we should use the gate valve in the piping system with high purity or Y filter fitted to minimize debris and impurities.