National Standard Wafer Type Multi-Layer Hard Seal Butterfly Valve

Product overview:

Butterfly valve is a kind of valve equipment with simple structure and compact volume, which is widely used in the field of fluid control. Its core component is a disc-shaped butterfly plate, which realizes fluid on-off and flow adjustment by rotating 90 degrees. Butterfly valve has the advantages of light weight, rapid opening and closing, and small flow resistance. It is especially suitable for large flow and low pressure difference occasions. According to the sealing form, butterfly valves can be divided into soft seals (rubber or polymer seals) and metal seals (suitable for high temperature or corrosive media). Common connection methods include clamp type, flange type and welding type to meet different installation needs. Butterfly valves are widely used in water supply and drainage, HVAC, chemical industry, electric power and other industries, especially in situations where rapid opening and closing or frequent operations are required. With the advancement of materials and manufacturing technology, modern butterfly valves have continuously improved in terms of corrosion resistance, sealing performance and intelligence, and can adapt to more stringent working conditions while improving system reliability and operating efficiency.

Product parameters:

Size range: 1/2"-56" (DN15~DN1400)

Pressure rating: ASME 150~1500LB (PN16-PN250)

>Temperature range: -46℃~538℃

Connection methods: flange, welding, threaded, etc.

Main materials: carbon steel, stainless steel, duplex steel, alloy steel, etc.

Sealing surface hardening treatment methods: Stellite alloy and nickel-based alloy overlay welding, WC spraying.

Operating methods: manual, electric, pneumatic, hydraulic, pneumatic-hydraulic, electro-hydraulic, etc.

Product standards:

1. Design Standard: JB/T8527

2. Structural length: GB/T 12221

3. Connecting flange: GB/T9124

4. Testing and Inspection: GB/T 13927

Contact Now

Product Details

Features:

1. This butterfly valve is suitable for pipelines in various working conditions such as petroleum and chemical industries with a nominal pressure of 1.0~25.0MPa (Class150-1500) and a working temperature of ≤538°C. It is used to cut off or connect the pipeline medium.

2. It has a simple structure, small size, short structural length, small volume, and light weight, making it suitable for large-diameter valves.

3. When fully open, the valve seat passage has a large effective flow area and low fluid resistance.

4. It is easy and quick to open and close, and has good adjustment performance.

5. The opening and closing torque is relatively small. Since the butterfly plates on both sides of the rotating shaft are subjected to the medium in an basically equal manner, the torque generated is in the opposite direction, so opening and closing is less strenuous.

6. The sealing surface material of the centerline butterfly valve is generally rubber or plastic, so it has good low-pressure sealing performance. The triple eccentric type uses a multi-layer or hard alloy overlay sealing surface to meet the high pressure and bidirectional pressure requirements.

National Standard Wafer Type Multi-Layer Hard Seal Butterfly Valve.jpg