High Quality/Customized Service /Motorised/ Factory Direct Sale /Gas/Oil/Steam/Electric Actuator/in Stock/DN500-DN800/Soft Seal Butterfly Valve

Product Description

The butterfly valve soft seal means that one side of the seal pair is made of metal material, and the other side is made of elastic non-metal material. The sealing performance of this kind of seal is better, but it is not resistant to high temperature, easy to wear, and has poor mechanical properties. Such as: steel + rubber; steel + tetrafluoropolyethylene.




1. The valve body is small and light, easy to install, disassemble and repair, and can be installed at any position in the pipeline.

2. The whole valve has a simple structure and is very compact, with small operating torque, and can be opened and closed by rotating 90 degrees.

3. It has good flow regulation performance.

4. The seal can be replaced, the sealing performance is good, and the two-way sealing can be achieved.

5. The butterfly plate can be sprayed with a coating layer, such as nylon rubber or polytetrafluoroethylene, according to the needs of users.

6. Flange connection and wafer connection can be designed according to requirements.

7. According to the requirements of the working conditions, the soft-sealed butterfly valve can be driven manually, electrically or pneumatically.

A resilient seated butterfly valve is characterized by a stem that is bored into the disk and attached to the bottom of the valve.  Most of the time, the seats of this kind of valve is made of rubber, hence, the term resilient. 

As such, the disc relies on the high contact capability of the seat and the seat for tight shut-off. With this kind of design, the seat-to-seal contact begins at about 85-degree turn.

Resilient seated butterfly valves are made of a one-piece. This increases the strength of the valve as well as reduce its weight. The rubber-back seat makes it easy to install even when the butterfly valve is outdoors. Because of the nature of the material, it has a reliable sealing capacity.

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.