The RAF 70 flow rate control valve is line pressure hydraulically actuated, 2-W pilot. Normally the valve is partly open to allow a constant flow rate.
The head loss across the orifice is proportional to the flow rate.
The RAF 70 maintains a constant preset flow rate, as set on the 2-W flow rate pilot and a calibrated orifice, regardless of pressure changes.
The 2-W pilot configuration together with Raphael’s patented diaphragm enable smooth and precise flow rate control.
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