the HDD series

ProControl Valve Actuation & Control - specialized in Scotch Yoke Actuators - canted and symmetric scotch yoke mechanism
ProControl Valve Actuation & Control - specialized in Scotch Yoke Actuators - canted and symmetric scotch yoke mechanism

HYDRAULIC DAMPERS

ProControl has created the HDD hydraulic damper series bearing in mind the users interests and engineering requirements in order to reduce surge pressure hammer blow, resulting from rapid valve closure typical of non-return valves.
The working principle consists in the dissipation in oil of the energy generated by the valve disc during its closing / opening movement.

KEY FEATURES

  • Special design of the hydraulic chamber cavities allowing easy and efficient drainage of hydraulic fluid from one chamber to the other through an interconnecting manifold which has an incorporated flow regulator allowing for fine throttling and different speed settings across the valves stroke.
  • Several models available to cover all swing check valves and eccentric butterfly valves without dimensions or torques limitations.

Following available options:

  • Speed control device which allow the adjustment of the operating time in two sequential steps, faster for the first part of the stroke and slower for the last segment.
  • For butterfly valves it is possible to fit the damper with an eccentric counterweight allowing to reach the complete closure of the terminal part.
  • Compact solution consisting of a fully enclosed cylindrical rotational device, consequently ideally suited for heavy duty operation which allows our clients long maintenance free periods due to non-exposed rotating components.

TECHNICAL SPECIFICATIONS

  • Dampening torque up to 500.000 Nm.
  • Standard operating temperature range -30°C / +100°C.
  • Special low temperature application up to -60°C.

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