Liquid, Gas and Water Regulating ValvesRegulating valve for liquid and gaseous mediumsThe RV gas or water regulating valves are basically a flow volume control unit that is constructed for use as a regulating valve for liquid and gaseous mediums in a filled and closed system. The installation size starts with DN 50 and is able to go up to DN 300.
The cylinder barrel is located inside of the valve housing, and driven by an excentric tappet. This can be stopped in any position and restarted again in the same direction or in reverse. The run time is approximately 90 seconds. The power supply for the electrical drive and electronics of the control valve, are supplied by a intrinsically safe power supply unit. The valve positioning signal is transmitted through a 0/4 to 20 mA signal or a current signal 0 to 5 V. Additionally, a digital signal with a band width of 5 Hz to 15 Hz. Both end position of the control unit “OPEN” and “CLOSE”, are provided as a potential free relay output inside the terminal box. For the drive and fault clearance purposes, the potential free contact at the potential free optocoupler must be used. The regulating valve has an automatic repeating circuit wiring. If the cylinder barrel is blocked, an inversion of the direction will occur. After a preset time has elapsed, the inversion activity will stop and the drive will commence in the foreseen direction. If the blockage is still not cleared, the regulating valve will then go into a “Fault” sequence, and is switched off electrically and locked. A signal at the fault clearance inlet will cancel the electrical locking. Nominal voltage / power is 12V DC / 1,2A, If power failure occurs, the control valve can be opened or closed using the hand wheel provided. To avoid damage during transportation the hand wheel is provided separately. Learn more about our Gas & Water Regulating Valves and other Coal Mining Equipment
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