At AC Valve Alliance, we pride ourselves on our ability to establish strong relationships with local and global suppliers. This enables us to source a wide range of products to meet the specific requirements of our customers. The customer for a large-scale project supply in the UK requested the inclusion of a 3″ KDV Flow A351 CF8M class #150 stainless steel Diaphragm valve, which would be utilised for fire water application. This manual operated weir valve includes an EPDM diaphragm, which makes it ideal for water applications.
Benefits Of Diaphragm Valves
Diaphragm valves, in general, offer numerous benefits over other types of valves, including:
Good Flow Control
An excellent solution for controlling the flow of a wide range of fluids, including corrosive and abrasive liquids, slurries, and gases. This is due to the unique design of diaphragm valves, which utilizes a flexible diaphragm to control the flow of the fluid.
Excellent Sealing Properties
The diaphragm of a diaphragm valve is an essential component that provides a tight seal against the valve body, preventing any leakage. The diaphragm is typically made of a flexible material such as rubber or plastic, and it is designed to be highly resistant to wear and tear. When the valve is closed, the diaphragm is pressed tightly against the valve body, creating a complete seal that prevents any fluid from leaking through the valve.
One of the significant advantages of diaphragm valves is their simple design, which translates to minimal maintenance requirements. Unlike other valve types that have complex designs, diaphragm valves have a straightforward construction, which makes them easy to maintain and service. They do not have any packing glands or stem seals that can wear out over time.
Resistance To Corrosion
Diaphragm valves are typically made from materials that are highly resistant to corrosion, such as stainless steel or plastic materials like PVDF or PTFE. This is due to them being commonly used in harsh and corrosive environments where other valve types might fail. They can also be fully lined, which means that a low-cost material can be used for the body while still being durable and reliable for use in corrosive environments.
Easy To Operate
Diaphragm valves can be operated manually or automatically, providing flexibility in their use across various applications. Manual operation is typically done through the use of a handwheel or lever, making it easy for operators to adjust the valve’s position and flow rate. Automated operation, on the other hand, involves the use of an actuator, which can be electric, pneumatic, or hydraulic. The actuator is connected to the valve stem and operates the valve by moving the stem up or down, controlling the position of the diaphragm and the flow of the fluid.
How Can Diaphragm Valves Be Used?
Diaphragm valves are versatile and can be used in a variety of applications across several industries. Some of the most common applications of diaphragm valves include:
Ideal for use in the pharmaceutical industry because they can handle a wide range of fluids, including corrosive and abrasive liquids, and are easy to clean. They are commonly used in processes such as fermentation, sterilisation, and filtration.
Food & Beverage
The food and beverage industry requires valves that are hygienic and easy to clean. Diaphragm valves are a popular choice because they are made of materials that are resistant to corrosion and can handle a range of fluids, including food products. They are commonly used in processes such as brewing, dairy processing, and bottling.
Diaphragm valves are commonly used in water treatment applications because they can handle corrosive and abrasive liquids and can provide a tight seal to prevent leakage. They are used in processes such as filtering, reverse osmosis, and disinfection.
Chemical processing requires valves that can handle corrosive and abrasive fluids. Diaphragm valves are a popular choice because they can handle a wide range of chemicals, including acids and alkalis. They are commonly used in processes such as mixing, blending, and transferring.
Oil & Gas
The oil and gas industry requires valves that can handle harsh environments, high pressures, and temperatures. Diaphragm valves are a popular choice because they are resistant to corrosion and can handle a wide range of fluids. They are used in processes such as refining, drilling, and transmission.
Overall, diaphragm valves are an excellent choice for applications that require control over the flow of fluids, a tight seal, and low maintenance. KDV offers a range of bidirectional weir type diaphragm valves that are highly durable and reliable. These valves have several specific brand benefits, including:
- Bubble-tight shutoff
- Easy/low maintenance
- Readily available spare parts
- In-line serviceable (top entry)
- Cavity free design
- Position indicator
- Excellent control characteristics
- Low fugitive emissions
- No stem seal leakage
- Line media isolated from valve mechanical