Double Flange Double Eccentric Butterfly Valve

Double Flange Double Eccentric Butterfly Valve

●  Brief

This butterfly valves can be used to control all kinds of fluid flow, such as water, seawater, sewage, hot water, gases. Mainly used in water treatment factory, cold water circulation system, chemical plant, hydraulic pump station, etc.

●  Features

1,  Based on EN593, we cite the AWWA C504 standard to prolong the safety and service life of the products.

2,  The streamlined inner cavity efficiently lowers the resistance of the medium.

3,  For the shaft, the sealing shaft design can well protect the shaft from medium and increase the coaxiality to reduce the torque, together extending the service life of the shaft.

4,  The shaft doesn’t pass through the sealing rings, so the sealing rings can be replaced while the valve is open.

5,  Using the shaft bushings to support the disc can effectively ensure the position, so the valves can be installed horizontally or vertically.

6,  The optimized double-eccentric design realizes the minimal torque to close/open the valve while keeping sealing. And the optimized interference prolongs the service life of the valves.

7,  The stainless steel seat is integral forming, embedded into the body to fit closely, forming a corrosion-proof and

wear resistance seal surface that can efficiently prolong the service life of the valves.

8,  The sealing of the seat is achieved by T-type resilience sealing ring which is inlaid between disc and disc gland ring. When the disc is closed, sealing ring will be extruded by disc gland ring to form two-way sealing. Sealing ring can be replaced without disassembling the disc. Self-reinforce seal function can be achieved when valve is closed and the pressure of fluid from different directions can enhance this effect.

9,  Use Akzo Nobel epoxy resin powder coating to ensure excellent adhesion strength and anti-corrosion ability

10,  There are adjusting screws on the top and the bottom to make sure the position of the disc can be fine-tuned to keep sealing.

●Standards and Specifications

1. Nominal Path: PN10 DN100-3000, PN16 DN100-2600, PN25 DN80-2000, PN40 DN80-1200

2. Test pressure: shell: 1.5 times rated pressure

Sealing: 1.1 times rated pressure.

3. Working temperature: 22 C ~ + 22O.

4. Driving device: gearbox, electric or pneumatic actuator

5. Design Standards Compliance: EN 593

6. Connection flange conformance: en 1092-2, ISO 7005-2

7. Upper flange conforms to ISO 5211

8. Side flange conformity: EN 558 series 13/14

9. The test standard conforms to: en12266-1

10. Rated working pressure: PN10/PN16/PN25/PN40