Festo releases fieldbus-controlled valve regulator
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Festo product story
Edited by the Engineeringtalk editorial team
Nov 24, 2008
Festo has launched a fieldbus-controlled proportional valve regulator that mounts directly on to a valve manifold.
The VPPM-MPA proportional pressure regulator provides design engineers with a means of varying the pressure of air supplied, via the valve manifold, to pneumatic actuators, giving accurate control of speed, force, pressure and torque.
Proportional pressure regulators are used extensively in the process and industrial automation industries.
Typical applications include controlling the contact force in polishing and friction welding, controlling web tension, providing active load cushioning and weight compensation, controlling the speed of pneumatic motors, and regulating the applied torque of pneumatic wrenches.
The regulators are also now beginning to be used in the leisure and medical engineering industries.
Designed specifically for use with Festo's MPA series valve manifolds, the VPPM-MPA proportional pressure regulator features a 1/8in proportional pressure valve and is available with a pressure range of 0-2 bar, 0-6 bar or 0-10 bar.
The 0-10 bar model accommodates a flow rate of up to 1400 l/min.
By employing a cascaded dual-stage regulator design - each with its own pressure sensor - the VPPM-MPA is able to maintain extremely tight regulation under a wide range of operating conditions.
Festo's MPA valve manifolds feature a built-in serial bus system, which accommodates all the fieldbus/Ethernet connections required by the modules that go to make up the system.
These can include digital and analogue I/O modules, pressure sensors and regulators, as well as the valves themselves.
VPPM-MPA proportional pressure regulators can either be commissioned remotely via fieldbus or Ethernet, or locally by using Festo's CPX-MMI hand-held control unit.
Programmable functions include setpoint, upper and lower limits, and a choice of three preset response profiles to facilitate fine tuning of the system without the need to set up complex PID loops.
Both the programmed setpoint and the actual pressure value can be monitored locally or remotely, and users can choose to display pressure units in bar, MPa or psi.
The regulators are capable of returning a range of diagnostic data via fieldbus or Ethernet, and are also equipped with front-panel LEDs to indicate power and operational status.
Festo's VPPM-MPA proportional pressure regulators can be freely mixed with standard and proportional valves on the same manifold.
They can also be used for multiplexing, whereby a single VPPM-MPA module can sequentially switch to several different pressure settings - even across multiple MPA valve manifolds.
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Contact Festo
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