OVERVIEW The pressure reducing valves are based on a series of exclusive pilots, which have been developed by the C Valves' R&D team. 1. Pressure Reducing valve (PR) Maintains stable pre-set downstream pressure regardless of upstream pressure or flow fluctuations. Basic hydraulic double-chambered valve with multi-directional ball valve supplied as standard with a 3-way pilot. (Can also be supplied with a 2-way pilot.) Normally closed (N.C) or normally open (N.O). A normally closed valve is recommended in pressure reducing applications which gives a quicker response to closing (protecting the downstream from upstream hammering) and closes in the event of control system failure. Gives stable regulation also at low flow rates, including zero flow, without need for a by-pass. Precise regulation (maximum deviation of 0.7 psi / 0.5 meter). High regulation ratios (see table in the Technical Data). Wide range of flow rates (see table in the Technical Data). It is recommended to install an external control filter, in addition to the existing flushing in-line filter, an integral component of M1 valves. Can be remotely controlled (hydraulic or electric). A 2" pressure relief valve must be installed after the pressure- reducing valve in case of line failures (e.g. stones). An air relief valve must be installed after the pressure reducing valve and care taken to vent air from the line so as to ensure stable functioning of the system. An orifice can be assembled in the groove coupling for extreme regulation conditions. If necessary, consult with the Company's Applications Dept. Pressure reducing valve available for three pressure ranges equipped with a low tension spring for pressures of 0-20 psi/0-1.5 bar; a moderate tension spring (standard) for pressures of 7 - 220 psi / 0.5-16 bar, and high tension spring for pressures of 20 - 250 psi / 1.5-24 bar. 2. Fix Ratio Pressure Reducing valve (RR) Maintains downstream pressure in relation to upstream pressure regardless of the flow rate. Basic hydraulic double-chambered valve normally open (N.O) with multi-directional ball valve. Reduction ratio is 0.62 of the upstream pressure. If the ratio is lower - the valve closes. Serves also as a check valve. 3. Pressure Reducing valve - Two Regulation Levels (or more) - (R2) Maintains pre-set, stable downstream pressure regardless of the upstream pressure or flow rate. An electric, hydraulic or manual control selects according to the pressure levels. Integrates all the properties of the pressure-reducing valve. Additional pilot enable additional pressure level to be maintained downstream of the valve according to electric, hydraulic or manual control. >

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