Diaphragm valves are pressure responsive elements that transmit force leading to opening, closing or controlling a valve. They are extremely clean with an easy maintenance and offer tight shutoff feature along with a leak-proof seal.
How do they control the flow?
A flexible diaphragm is connected to a compressor by a stud that is molded into a diaphragm. The diaphragm is pushed into contact with the bottom of the valve body to provide shut off instead of pinching the line closer. Starting or stopping applications is done by turning the hand wheel until the compressor lifts the bottom or pushes the diaphragm against the bottom of the valve body to stop flow.
How does it function?
Connect the diaphragm to a compressor by a stud molded into the diaphragm. When the compressor is moved up, the flow starts and can be increased. While to stop or slow down the process, the compressor is lowered. These diaphragm valves are best suited for controlling the flow of fluids containing suspended solids and offer flexibility of installation in any position. Throttling is better with weir-type diaphragm valves than with straight valves due to the design’s large shutoff area along the seat. The diaphragm performs the role of a gasket of the valve to seal against leaks between the bod and bonnet cap.
Where is the diaphragm valve used?
These valves are best suited for handling fibrous slurries, corrosive fluids, radioactive fluids and other fluids that are not contaminated. The best thing about diaphragms is that they are not exposed to the media and can be used with viscous or sticky fluids.
What are its components?
The construction of a diaphragm valve consists of a body and an actuator.
- Diaphragm body is made of a stem, bonnet and a compressor. The stem can be indicating or non-indicating and does not rotate. The diaphragm valve bonnets are lever-operated and quick opening and can be interchanged with standard bonnets on the conventional weir-type bodies. You can open or close the diaphragm with a 90° turn of the lever. Operations of the diaphragms are performed by a compressor that is located above the diaphragm and below the handwheel stem.
- The valve actuator performs an operation of the stem and disc to open or close the valve. There are several types of actuators like manually operated, electric motor, pneumatic, hydraulic and thermal actuators. You can select an actuator which gives you the expected output power to ensure high degree sealing and valve opening.
What are diaphragms made of?
The bodies of diaphragms can be made of materials such as solid plastic, plastic lined, glass lined, rubber lined solid metals and alloys.
You can use the diaphragm valves to connect into a variety of piping systems. But be sure of the pre-existing system requirements and the type of seal desired.
JTC Valve Sales offers to you master valves manufactured by trusted brands – Sherwood & Rego in the USA. You will be amazed to get these industrial products at such an economical price on our website.
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