Hot Products Ductile Iron/Cast Iron Carbon Steel Body EPDM Soft Seal Wafer Manual Butterfly Valve for Water Oil Gas

Product Description

 

A soft seal butterfly valve, also known as a resilient seat butterfly valve, is a type of butterfly valve that uses a soft, elastomeric seat to create a tight seal between the disc and the valve body. This type of valve is commonly used in applications where a bubble-tight shut-off is required, such as in water treatment, HVAC, and industrial processes.

Soft seal butterfly valves are versatile flow control devices used in various industries for their reliable sealing performance, bubble-tight shut-off, and suitability for a wide range of applications. Their resilient seat material ensures tight sealing integrity, making them a preferred choice for critical flow control applications.

Tight Shut-Off: Soft seal butterfly valves provide a bubble-tight shut-off, ensuring no leakage of fluid when the valve is closed.

Low Maintenance: Soft seal butterfly valves have few moving parts and require minimal maintenance compared to other types of valves.

Cost-Effective: The simple design and construction of soft seal butterfly valves make them a cost-effective solution for many applications.

Easy Installation: Soft seal butterfly valves are easy to install and require less space than other types of valves, making them suitable for use in space-constrained areas.

The butterfly valve body is a sturdy, rigid piece of metal that covers the internal parts. The seat covers the inner edge of the valve's walls and is the primary sealing agent. When the butterfly valve is closed, the disc lodges against the seat and the butterfly valve closes.

Wafer valves are a great choice for many applications because they are lightweight, compact, and are easy to install. They don't need expensive exotic materials, and they are also much more cost-efficient than other butterfly valves. However, the body and valve linings are often prone to wear and tear, which makes maintenance much more difficult. In order to properly maintain a wafer butterfly valve, you must shut down the entire pipeline.

When the butterfly valve is closed, the wafer aligns with the direction of flow. When the wrench is rotated back to its original position, the valve opens. As the commodity passes through the valve, the wafer is pushed into position. This prevents the commodity from getting stuck in the valve. The valve can be used in many different ways.

Butterfly Valves by Connection Type

This classification is based on how the valve is connected to the pipes.

Wafer Type

This is the most economical and lightweight. This design aims to prevent bi-directional differential pressures and backflows. There are two pipe flanges that sandwich the valve. They seal and connect the valve to the pipe system through bolts. For stronger sealing, there are O-rings and gaskets placed on both sides of the valve.

Lug Type

The lug type butterfly valve has lugs placed outside and around the valve body. These are often used in dead-end services or in applications that only require low pressure. The lugs are threaded. Bolts, which match that of the pipes, connect the valve to the pipe.

Butt-Welded

The butt-welded butterfly valve has the connections welded directly to the pipe. This type of valve is primarily used for high-pressure applications. 

Flanged

This type is characterized by having a flange face on both sides. This is where the valves connect. This design is typical among large-sized valves.

 

 Material of Metal Seated Butterfly Valves
 

No	Part	Material
1	Body	ASTM A351 CF8
2	Seal Ring	Graphite + SS304
3	Retainer Flange	ASTM A182 F304
4	Pin	ASTM A276 304
5	Disc	ASTM A351 CF8
6	Stem	ASTM A276 304
7	Stem Packing	Graphite
8	Stem Beating	SS304 + PTFE
9	Bolt	ASTM A193 B8
10	Nut	ASTM A194 8
11	Yoke	ASTM A216 WCB