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A diaphragm valve is a device that helps to control the flow of air in and out of a pipe. It is used in many different applications, but the most common use is to control the flow of air in and out of an exhaust system. of a vehicle. The valve is made of a thin, flexible material called the diaphragm and an attached stem that fits into the inside of the pipe. The diaphragm is designed to allow air to flow in one direction while preventing air from flowing out of the pipe in another direction. When this happens, gas bubbles are formed in the pipe and when the pressure in the pipe drops, these bubbles rise, forcing air out of the pipe. The valve is designed to let the gas out of a pipe when the pressure is high and then allow it to enter when pressure decreases. The diaphragm is made up of several thin layers that are pressed together under tension so they can be more easily compressed and more easily.
Working Of Diaphragm Valve
If the valve’s operator wishes to increase the flow rate, they move the stem up. When the stem is moved up it shifts the compressor upwards direction. This compressor transfers its movement to the diaphragm. As the diaphragm moves upwards, it is also moving upwards.
As the diaphragm rises and down, the flow of fluid rises depending on the needs of the user.
If the operator wishes to shut off or reduce the flow of fluid then he turns the stem and turns it downwards. The stem transmits its motion onto the compressor. It then pressurizes the diaphragm downward direction, and then reduces or shuts off the flow.
Certain valves can also throttle the flow of fluid. In this case, the diaphragm may be closed and then partially open.
Types of Diaphragm Valves
The diaphragm valve comes in the following kinds:
- Weir valve
- Straight-way valve
1) Weir Diaphragm Valve
It is among the most popular kinds of diaphragm valve manufacturer. This model is great for leak-free, small flow control because of the bonnet of the diaphragm and actuator.
The body shape of the inclined design of this valve offers an exclusive self-draining function that can occur in both directions the valve. This valve is ideal for all applications.
They are the best choice for hazardous or corrosive gases and liquids since the valve bonnet regulates the diaphragm’s failure, or any leakage caused by the valve.
Weir valves are used primarily to clean, homogeneous liquids due to the fact that viscous sludge and contaminants can build up on the saddle’s edge. They are commonly used in gas, water, corrosive production, chemicals, as well as food-related applications.
2) Straight-way Diaphragm Valve
Straight-way valve, also known as an in-line valve is the same structure similar to the weir type, but it is a straight path instead of the saddle.
They have diaphragms that are more flexible. They are able to are in contact with the bottom of the valve, which could increase the diaphragm’s travel distance. Due to the flexibility of the diaphragm, these valves generally have a shorter life cycle than the weir structure and require frequent repairs/replacements.
Straight-way or in-line diaphragm valves are utilized for the water-sludge industry, viscous fluids and other situations in which you wish to minimize the possibility of clogging. They are also suitable for flow ranges that are bidirectional since there’s no saddle that can hinder quick transitions from outlets to inlets.
