Column Drain Valve

The Y-body and poppet-in-cage design result in a robust valve with a well-supported poppet, which permits throttling at 25 MPa. This allows the valve to be used for pipe filling and flushing. It also provides for slow and gentle opening and closing and thereby eliminates pressure surges (water hammer).
The valve is also available in an angle pattern format.

Purpose

The purpose of the Isolation Valve is to isolate flow in the forward flow direction at pressures up to 25 MPa.
It can be used as a manual isolation valve with a simple hand-wheel. Alternatively, it may be controlled with high-pressure water or an electric actuator and used as a control valve. For example, because the valve is capable of throttling, it can be used as a pump control valve or pressure sustaining valve. Many other applications and control configurations are possible.
Valves over 50NB are fitted with reverse flow protection and therefore will also isolate in the reverse direction.

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Features

  • The main valve poppet and seat is our labyrinth grooved type that has proven to be best in “wire drawing” erosion, cavitation and dirt resistance.
  • The poppet and seat elements are stainless steel.
  • The valves have only one small full pressure working seal.
  • Closing of the valve is by a small hand-wheel that can be turned with one hand to shut off at pressures of 25 MPa.
  • Control can be manual, rotary electric actuator or by servo cylinder.
  • Servo cylinder controlled valves can be manually overridden to close for added safety.
  • The internal parts are all of corrosion resistant materials.
  • The seals are proven to be the best design that stands up to dynamic water cylinder sealing.
  • Maintenance can be done in line requiring access from the hand wheel side only.
  • The valves must always be primed before full performance can be achieved.
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Technical Specifications

  • The valve is designed to ANSI B16.34.
  • The valve body is rated to 25 MPa (ANSI Class 1500), but the valve pressure rating is limited by the flanges fitted.
  • For fatigue life up to 10 million cycles, the valve body pressure rating is reduced to 14 MPa.

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