VAN MỘT CHIỀU BƯỚM DK VALVE - Butterfly check valve

Butterfly check valve

A butterfly check valve with counter weight and hydraulic cylinder is very reliable as it can regulate the closing time of the valve itself.
This valve is applied in pipelines as a non-return device, with flow allowed in one direction only.
The butterfly check valve with counter weight is double-eccentric type with a tilting disc, the counter weight lever will faciliate the anti-hammer device and
the oil cylinder will slow down the closure movement, to reduce any slam with noise. With the damping system, the water hammer effect can be prevented
effectively by reducing the damping time.
The flow opens the valve in the desired direction, while back flow forces the valve to close.
Full tightness is ensured by an elastomer-to-metal seat design and it can be easily replaced without dismantling the valve from the pipeline.

Standard Specifications

• 

  DESIGN

  ▪ In reference with
  ▪ AWWA C 504
  ▪ BS 5155
  ▪ JIS B 2064

  FACE-TO-FACE

  ▪ BS 5155 Short Type
  ▪ AWWA C 504 Short Type
  ▪ Others on request

  FLANGE STANDARD

  ▪ ASME B 16.5/16.47
  ▪ BS 4504 / EN 1092-1
  ▪ JIS B2220
  ▪ Others on request

  PRESSURE RATING

  ▪ AWWA C 504
  ▪ Class 25 / 75 / 150

• 

  NOMINAL DIAMETER

  ▪ 8” to 120”
  ▪ DN 200 to 3000

  INSTALLATION OPTIONS

  ▪ Horizontal
  ▪ Vertical

  LINING OPTIONS

  ▪ Full rubber lined
  ▪ Rubber lined body only

  TESTING

  ▪ AWWA C 504

Applicable Materials