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Unique RV-P

Regulating Valves > Unique RV-PConcept

Unique RV-P is a hygienic electro-pneumatic regulating valve for use in applications which require precision control of pressure, flow, temperature, level in tanks etc.

Working principle

It is remotely-controlled by an electrical signal and compressed air. The IP-converter, which is an integrated part of the actuator, converts the electrical signal to a pneumatic signal. This signal conversion is based on a highly accurate and reliable contactless AMR sensor making it insensitive to vibrations and pressure shocks. The pneumatic signal is transmitted to the integrated positioner which operates by means of the force-balance principle, ensuring that the position of the actuator piston is directly proportional to the input signal. Signal range and zero point can be adjusted individually. The actuator can be used for split-range operation by using a different measuring spring.

Standard design

The valve is built on the Unique SSV platform and consists of valve body, valve plug, lip seal, bonnet and an external actuator. The actuator with the bonnet is fitted to the valve body by means of a clamp. The Kv value is flexible as lower element can be exchanged.

Documentation

Construction

The Unique RV-P valve consists of a valve body without seal, cone-shaped regulating plug, lip seal, bonnet and an actuator. The actuator with the bonnet is fitted to the valve body by means of a clamp ring.

The standard valve is supplied with a standard normally open (NO) actuator. Upon request, it may also be supplied with a normally closed (NC) actuator.

Operating principle

Alfa Laval Unique RV-P valves feature an electro-pneumatic actuator with an integrated IP converter, which provide accurate and reliable conversion of electrical signals from a controller directly to pneumatic signals. With the contactless magentic sensor technology the actuator and positioner is insensitive to vibrations and pressure shocks.

The pneumatic signals are relayed to an integrated positioner, which operates by means of the force balance principle. This ensures that the position of the actuator piston is directly proportional to the input signal. Signal range and zero point can be adjusted individually.

By changing the standard measuring spring, the actuator may also be used for split-range operation.

The Unique RV-P valve

Options

  • Fittings in accordance with required standard
  • Aseptic version based on Unique SSV Aseptic diaphragm system
  • External surface finish of Ra 0.8μm
  • Explosion protection (EEX ia IIc T6) on request
  • 3A (Sanitary Standard) labelling on request
  • Lip seal of NBR or FPM

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