What are rubber lined valves and their types?

Rubber Lined Valves are full-bore or ported control valves that do not block flow passage. Several types of pinch rubber-lined valves are available, depending on the application.

Rubber lined valves are composed of three distinct parts:

  • Body 
  • Ends (flanges, tri-clamp, threaded spigot, weld-on ends)
  • Sleeve/Liner/Insert made of elastomer
  • Screwed Pinch Valves AKO

Screwed rubber-walled valves are closed by air pressure. They have screwed end connections with internal BSP threads and come in sizes ranging from 10mm to 125mm.

Flanged Pinch Valves from AKO

To close flanged rubber-lined valves, air pressure is used. These valves have flanged end connections and are available in diameters ranging from 25 mm to 300 mm. AKO flanges are BS4504 (New British Standard) and NP (Nominal Pressure) 16 compliant. We do not comply with BS10 (the old British Standard).

Different Industries rubber lined butterfly valves or rubber lined valves used-

There are different industries where rubber-lined valves are used for functions-

  • Food and Beverage 
  • Pharmaceutical
  • Water 
  • Tankers 
  • Chemicals
  • Agricultural – Silos – Sewage

Certain materials act more abrasive than others. Therefore, their requirements vary. It will impact the sleeve, body, and even the type of ends required for a specific job or application. Softer sleeve materials work effectively with abrasive products. Natural Rubber sleeves are widely used because they are appropriate for handling numerous abrasive compounds up to 80 degrees Celsius.

Different Types of Sleeves for Rubber lined valves

  • Natural Rubber: General use.
  • Natural Rubber Food Quality: It is FDA Approved to use in the Food industry.
  • High-Temperature Natural Rubber: When operating levels are between 80-90 degrees C.
  • EPDM: Perfectly suitable for products up to 120 degrees C and is to check food quality versions white/black.
  • Viton
  • Nitrile: Also available in food quality
  • Silicon

Different Types of Rubber-Lined Butterfly valves

Rubber-lined butterfly valves play a key role in applications that demand a tight shut-off. The disc opens and shuts with a 90-degree low-torque spin and is suitable for any compatible application. They are favored over other valves because they are less expensive and lighter in weight. Butterfly valves come in three types: zero, double, and triple offset.

  • Butterfly Valves with Zero Offset

These valves are used to reduce the tightening issues between the butterfly valve’s disc and seat. The stem and disc of the valve are in the middle. When the disc deforms the soft seat, a seal is made. It means that full friction exists throughout the entire operating cycle. This valve is suitable for use with chemicals, coatings, and abrasives. One of the benefits is that media passing through the valve will not contact the body because the seat of the valve covers it.

  • Butterfly Valves with Double Offset

The stem center deviates from the center of the disc and valve in the double-offset configuration. This design allows the valve disc to get out of the valve seat quickly. It reduces the amount of overcompression and scraping between the two parts. This construction also aids in reducing wear and extending the valve’s operational life. Because there is less scraping, the seats of these valves can be made of metal. It means that butterfly valves can be used in places with high temperatures.

  • Butterfly valves with three offsets

The triple offset design prevents flow path rubbing between the seat and seal ring, decreasing seat and seal wear, and extending cycle life. It plays a key role, just like gate valves involved, as per the requirement of a metal seat. This type of valve carries low torque and is suitable for hot and low temperatures.

Conclusion

You can choose the best Rubber-Lined Butterfly valves that will help get the result required for the easy flow of water or chemical.

Vidhi

Hi, I'm Vidhi! I have 2 years of content writing experience. I am running think-how.com, myinvestmentplaybook.com and smallpetanimals.com websites individually. And also I work for many other agencies and websites.

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