Eccentric butterfly valve

 An eccentric butterfly valve is one in which the stem does not pass through the centerline of the valve plate, but is behind it (opposite to the direction of flow). When the stem is directly behind the centerline of the valve plate, it is called a single eccentric valve. This design was developed to reduce contact between the flap and the seal before the valve is fully closed, with the goal of increasing the valve's service life. Today, single eccentric valves have given way to double and triple eccentric butterfly valves. In a double eccentric or double eccentric butterfly valve, the stem is located behind the valve plate and is additionally offset on one side. This double eccentricity of the stem allows the rotating disc to rub only about 1 to 3 degrees on the valve seat.

Triple eccentric butterfly valves are typically used in critical applications and are similar in design to double eccentric butterfly valves. The third offset is the disc seat contact axis. The seat surface is tapered and combined with the same shape of the valve spine to create minimal contact before the valve is fully closed. Triple eccentric butterfly valves are more efficient and have less wear. Triple eccentric valves are typically made with metal seats to create an airtight shutoff. Metal seats allow butterfly valves to be used in higher temperature ranges.

 

High performance butterfly valve designs use pressure in the pipeline to increase interference between the seat and the edge of the valve plate. These butterfly valves have a higher pressure rating and are easy to wear.

 

Double eccentric butterfly valve

  

 

Valve sizes: DN40 - DN2800.

Pressure rating: PN10 - PN25.

Materials: WCB,LCB,WC1,WC6,WC9,C5,CF3,CF3M,CF8,CF8M and other alloys.

Operators: handle, gearbox, electric actuator, pneumatic actuator

Design and manufacture.

API609, DIN3840 Face-to-face dimensions: API 609, EN558

Flange end dimensions: EN1092, ANSI B16.5

Test and inspection: EN12266, API598

End face: RF ,RTJ,BW

Drive device: hand wheel, gear box; electro-pneumatic actuator

 

Triple eccentric butterfly valve

 

Triple eccentric butterfly valve

Valve size: DN40 - DN2000.

Pressure class: PN16-PN160, Class 150~Class900

Material: WCB,LCB,WC1,WC6,WC9,C5,CF3,CF3M,CF8,CF8M and other alloys.

Operators: handle, gearbox, electric actuator, pneumatic actuator

Design and manufacture.

API609, DIN3840 Face-to-face dimensions: API 609, EN558

Flange end dimensions: EN1092, ANSI B16.5

Test and inspection: EN12266, API598

End face: RF ,RTJ,BW

Drive device: hand wheel, gear box; electro-pneumatic actuator

 

 

FAQ:

1. Can I get a sample?

A: Yes, we can provide samples for you

 

2. Can I ask to change the packing and shipping method?

A: Yes, we can change the packing and shipping method according to your request, but you have to bear the cost and price difference in the meantime.

 

3. Can I ask for early delivery?

A: This should depend on whether we have enough stock in our warehouse.

 

4. Can I have my own logo on the product?

A: Yes, you can send us your drawings and we can make your logo, but you must bear the cost yourself.

 

5. Can you produce products according to my own drawings?

A: Yes, we can produce products according to your drawings to your best satisfaction.

 

6. What are your payment terms?

A: T/T, L/C for full protection of your order.

 

7. Do you accept custom design in size?

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