Double Eccentric butterfly valve

1. PROFUCT PROFILE

Flanged double butterfly valve is one type of long pattern butterfly valve. It is one type of high performance butterfly valve, which is with eccentric action reduces torque and seat contact during operation, extending valve service life. Its seat can be repaired on site, no needing dis-assembly. The double flanged eccentric butterfly valve is suitable for 90° on-off operation and regulation service. The double eccentric butterfly valve long time face to face is according to EN558-1 series 14. Prosper Flow manufacture the EN558-1 double flanged butterfly valve according to the standard of EN593-2004 with sizes of 4”~48” (DN100~1200mm).

2. FEATURES

· Pressure loss is at minimum level by double shaft design.

· With the o-rings on the bearing bushings, disc pin holes are protected against corrosion (Dry shaft)

· Retaining ring is assembled to the disc with imbus bolts, the disc is protected against corrosion by placing o-rings under the bolts.

· Through the gearbox assembled on top flange, it maintains openning/closing the valve with very low torques.

· Lifting lugs and feet ease the weight balance during transport and installation.

· With the stainless steel welding, in the valve will have higher sealing resistance.

3. TECHNICAL SPECIFICATION

· PN6/PN10/PN16/PN25

· Size: 4”~160” (DN100~4000mm)

· Materials: cast iron A126 B (GG25), ductile iron A536 65-45-12 (GGG40/50)

· Coating: fusion bonded epoxy coating min. thickness ≥250micron

· Working temperature: 0℃~+80℃

4. STANDARD

· Design & manufacturing: EN593-2004

· Face to face: EN558-1 series 14, DIN3202-F4

· Flanged ends: ISO7005-2, EN1092-2, DIN2501

· Top flange: ISO 5211

· Inspection & testing: EN12266

5. APPLICATION

· Water works, water projects

· Environment protection

· Public facilities

· Power plant

· Real estate

· Petroleum, chemical industry

· Steel work, metallurgy

· Paper plant

· Food & beverage