Bhola Engineers, we manufacture a quality Double Block & Bleed valves meeting demanding customer requirements. Our Double Block & Bleed valves are designed in accordance with ASME B16.34 and where applicable with API 6D or BS EN ISO 17292 and are available in an extensive range of designs, materials, sizes and pressure classes and are in full conformance with ASME, API and NACE specifications.
Double Block & Bleed – Floating Type
All BEPL ball valves is based on the “floating ball “ principle which allows the ball to turn freely between the ball seals. A positive seal is attained by fluid pressure acting on the upstream surface of the ball and producing a constant uniform contact between the downstream ball seal and the ball.
The ball is operated by a sealed spindle with a projecting square end to which the control handle or optional actuator is attached. Ball valves are intended to be used as on / off flow control devices and are not to be used to throttle fluid flow. The valves should always be either fully open or fully closed.
Double block & Bleed - Trunnion Type
Trunnion ball valves have a mechanical means of anchoring the ball at the top and the bottom , this design is the standards design applied on larger and higher pressure valves. Sealing is achieved by spring loaded piston type seats which shut off flow when line pressure acts on the upstream seat. Automatic relief of cavity overpressure is assured due to the Trunnion design in case of self relieving seats (BEPL Standards Design) . The ball is operated by a sealed spindle to which the operator is attached . Ball valves are intended to be used as on/off flow control devices and are not to be used to throttle fluid flow . The valves should always be either fully open or Closed