Description
RAF 68 & RAF 683 are piloted hydraulic valves activated by line pressure. Both pilots have spring- loaded membranes. One pilot is sensitive to upstream pressure & the other to downstream pressure. The combined operation of the two pilot valves sustains a constant pressure upstream of the RAF valve, & at the same time, reduce the downstream pressure to a preset pressure. The RAF valve opens or closes gradually to maintain both required pressures simultaneously.

Applications
Use the pressure reducing/ sustaining valve to define two pressure zones along a supply line, typically, along a downhill flow. Use RAF 68 for general water supply systems with medium pressure rating. The elaborated 2-way command with Raphael's patented diaphragm enables smooth & precise pressure control. RAF 683 with plastic pilot valve is best for low pressure networks. Use RAF 683 for agricultural, domestic & rural water supply. The plastic materials provide high resistance to corrosion & cost- effective prices applicable in water treatment circulation & filtration manifolds.

RAF 68 - Two-way pilots

RAF 683 - Three-way pilots