China Butterfly valve manufacturer,factory and supplier-Butterfly valve

contact us


Address: NO.720, Suide Road, Jiading District,Shanghai, China.
Ball valve manufacturer   

China Soft seated butterfly valve factory

  • Port size:2″ to 80″,DN50-DN2000
  • Pressure:PN10-16 bar,150LB,JIS 5K 10K
  • Structure:Concentric,eccentric structure is optional
  • Medium:Water,air,etc.
  • Temperature :-29~120℃
  • Body material:Cast iron,ductile iron,carbon steel,stainless steel,etc.
  • Connection:Flanged,wafer or lugged end
  • Feature:Zero leakage,different operation is optional.
China soft seated butterfly valve manufacturer, factory and supplier. Soft seated butterfly valve can be concentric and eccentric structure, which provide a bi-directional bubble-tight shutoff (zero leakage) by the use of a patented seat. Soft seated butterfly valve is designed for high services with minimal wear and low torque. Seat replacement is a simple operation, requiring no special tools.

Soft seated butterfly valve specification

Sizes available: 2″-80″ (50-2000mm)
Body Connection: Flange, Wafer,Lug type
Body Materail: WCB,304SS, 316 SS (A351-CF8 CF8M)
Disc Materail: WCB, 304SS, 316 SS (A351-CF8 CF8M)
One piece stem: 17-4PH or 316SS
Packing: PTFE or graphite
Seats Design: NBR,EPDM,VITION,PTFE Soft Seat, 
Manual Operator: Lever Handle, Worm Gear Operator
Automatic Operation: Pneumatic Spring Return, Pneumatic Double Acting, Electric Motor
Pressure ratings: ANSI Class 150; DIN ISO PN10, PN16.
Shell/Seat Test: API 598

Soft seated butterfly valve feature
• One-piece stem design with ISO 5211 square drive
• ISO 5211 direct mounting flange on the valve body
• Easy-adjust gland packing accessible with actuator mounted in place
• Belleville washers on the gland nut offer reliable primary sealing between shaft and packing
• Retaining ring for both equably pressing on packing and stem blowout proof
• Multiply rows of RPTFE chevron for soft seat valve and Graphite chevron for fire safe and metallic seat
• Extended neck for pipe insulation
• Self-energized seat resulting in longer life and reduced maintenance Pin-less shaft to disc connection makes the valve convenient for parts replacement and reliable even under corrosion
• Seat retainer supports the seat and allows for easy change out
• Double offset disc reducing the valve torque
• Alloy harden disc surface for metal seat increases the sealing life time
• Integral disc stop prevent disc from over travel
• Soft seat, fire safe seat and metallic seat are replaceable each other
• PTFE lined SS316 bearing support stem and increase service life
• Thrust ring for anti-blowout and anti-static