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Valve Designer , 

Manufacturer and Facilitator

BV12 Concentric Resilent Seat (Replacable) Butterfly Valve
    Publish time 2017-03-03 08:21    
BV12 Concentric Resilent Seat (Replacable) Butterfly Valve
Design standard : 
API 609/EN593
Connection standard:
ISO 7005-2 PN10/16/25; EN 1092-2 PN10/16/25; GOST PN10/16; 
ASME B16.5 CLASS 150; ASME B16.47 CLASS 150; JIS 10K;
Mounting flange: 
ISO 5211
Face to face :
API 609A /EN558 (20 serial)
Testing standard:
API 598/EN12266-1
Working pressure:  PN10/16(DN40-DN3000   1.5"-120")
PN25(DN40-DN600   1.5"-24")

BV12 Wafer(DN40-DN1200 1.5"-48")
BV12 Lug(DN40-DN1200 1.5"-48")
BV12 U-type flange (DN40-DN3000 1.5"-120")
Operation Type
manual, electric, pneumatic, hydraulic, etc.


  • Valve body and valve plate materials can be selected: nodular iron, carbon steel, stainless steel, copper, aluminum and special alloy(nodular iron, carbon steel surface resin spraying).
  • According to the requirements of different working conditions, select different materials of sealing materials (such as:NBR,EPDM,SIL,FKM,PTFE,medical and food grade,special rubber in sea water, etc.)
  • The product is suitable for fresh water, direct drinking water, seawater, sewage treatment and gas systems, and can also be used in acid, alkali, salt and other corrosive media.
  • The product has been ACS, WRAS, NSF certification, can be used in drinking water and medical and food applications.
  • If you have special technical requirements, please consult the company

Product features

  • The disc and shaft are connected without pin to reduce the leak achieve on-site replacement.
  • Ball-type sealing is adopted by the connection of Disc and Seat ensuring better connection of Disc and Seat, better sealing capacity and low torque. The double stem design of the Disc efficiently lowers the pressure loss of the valve and reduce flow resistance.
  • The seat has no skeleton and adopts concave and convex slot design. Seat stability, sealing compensation and effective reduction of torque. According to the requirements of different working conditions can have a variety of different material choice.
  • The shaft and body can be accurately connected to the plate and self-lubricated by adding a bushing design to extend the life of the valve.
  • According to the requirements of different working conditions(body, plate, shaft, seat) can be a variety of different materials to choose.
  • The upper and lower shaft ends of the valve are designed for special sealing to ensure zero leakage of the outer seal of the shaft end.
  • Within the rated pressure range, the product torque is reasonable. It has been verified by practice that the sealing life of the product is long and the opening and closing torque is stable.