Gate valves are widely used materials. They can be adapted to overhead networks, but also to underground networks. The price for replacing a gate valve can be high, it is crucial to choose the most suitable valve to avoid this. They are designed in two ways: either it is closed or it is open. The role of the gate valve is to regulate the pressure of fluid and gas. They are placed in a special place which is called valve chambers.
How does a gate valve works?
It works like a faucet when it comes to a gate valve. It is possible to make a rotational movement through an operating rod. Opening (FAH) and closing (FSH) are clockwise. We notice a displacement (up or down) of the threaded part of the stem when the valve is operated. Full passage or minimal pressure loss requires the use of gate valves. The flow obstruction limits pressure drops and the use of a line scraper can be done if a conventional valve is fully opened. These are valves that make multi-turns, a slow maneuver prevents the phenomena of water hammer.
What are the appropriate conditions when using a gate valve ?
The gate valve is a through valve. There is a wide variety of fluids that may require gate valves. They can be used in the transport of neutral liquids, drinking water and waste water. The temperature must be between -20 ° C to +70 ° C. A differential pressure of 16 bar is required. The flow speed should be 5m / s maximum. They can also be used for gas transport. The temperature must be between -20 ° C and + 60 ° C. The gas flow speed should be 20m / s maximum and the differential pressure is also 16 bar. It is important to follow the directions to avoid unpleasant surprises.
What is the special feature in the gate valve?
Apart from being a gate valve, it also has a through valve. It is different from the parallel valve, its peculiarity is that it has a shovel which is slightly inclined and it has two seats. There are two main materials that make up the gate valve, the metal gate valve and the rubber gate valve. Those which are made with metal require a bottom depression for the watertight seal. Those that are made with rubber will serve as a filter that absorbs impurities.