Control valves - Import export

The electrical fine control valve makes it possible to adjust volume flows precisely via an input signal (4-20 mA) and to approach an exact spindle position. The valve can also be controlled by a 24V continuous voltage. Position feedback is implemented by a 4-20 mA output signal. With an additional adapter, the valve can also be connected via an RS-232 interface to a computer. The valves are available in 1/4" (10-200 l/h of water) and 1/2" (50-500 l/h of water).

The fine control valve regulates even the smallest flow rates with great precision and with linear flow rate characteristics. Different spindle types are exactly matched to the media and the flow range. Additional safety and reliability are achieved by the spindle thread outside the media flow.

When operating pneumatic valves (diaphragm valves, etc.) special attention is placed on the protection of the control air system. The 5A compact safety valve reliably protects the control air system against media flowing back in case of leaks. The valve is automatic and therefore provides safety in the application.

Characteristics, Function The retrofittable optimized grinding gap adjustment for Pallmann Refiner Systems, type PR is software controlled. The grinding gap adjustment is installed operator-friendly at the rear of the main bearing of the refiner. This retrofit unit consists primarily of the control valve and a measuring device. Advantages Less components therefore less spare parts requirements Low operating- and maintenance costs Can be controlled to one hundredth of a millimeter Unsusceptible to malfunction