ST M3770 ENG STA R1 04/17 M3770: SOLENOID CONTROLLED / ELECTRICALLY POSITIONED VALVE - STEP BY STEP VALVE DN300 to DN1000 OPERATING PRINCIPLE The valve is equipped with two solenoids, both configured standard as NC, which means that in absence of power the main valve remains locked in the last position setting. A remote control system reads flow, level, or pressure sensors and emits electric impulses to move a solenoid that reatains a volume of fluid in the main chamber and position the valve as required. The valve can be supplied as NC or NO according to the application. This valve is typically used in networks or water supplies with direct acting remote control on the valve, capable of monitoring and maintaining an adjustable set point. The on-off function is managed by remote control capable of stepped opening and clossing of the valve to prevent excess speed and surge. It offers a very simple solution in all contexts requiring flow, level, or pressure control rather than a motorized control valve. ADDITIONAL FEATURES AVAILABLE: pressure reducing function (in parallel); minimum inlet pressure maintenance (in parallel or in line); flow rate control (flow limiter) in parallel or in series; check function to prevent backflow if the outlet pressure rises higher than the inlet pressure; main valve opens fully to permit reverse flow if the outlet pressure rises higher than inlet; on-off float control function (safety control); on-off altitude control function (safety control); two way flow; IP68 available for the solenoids. 1/3
ST M3770 ENG STA R1 04/17 M3770 CIRCUIT LAYOUT 7a 7b 9a 3 5a 4a 6 4b 5b 2e 9b 8a 2b 2a 2c 2d 8b 1 ITEM DESCRIPTION MATERIALS 1 Main valve GJS400-15 EN1563 2 (a,b,c,d,e) Isolating ball valve Ni-plated Brass 3 Y - Strainer with calibrated orifice 1.4401 EN10088-3 + Brass 4 (a,b) Bidirectional needle valve 1.4401 EN10088-3 + Brass 5 (a,b) Auxiliary two way N.O. valve VA200 1.4301 EN10088-3 + Brass 6 Position indicator with manual venting cock Brass + Hardened glass 7 (a,b) Solenoid valve Brass 8 (a,b) Gauge holder with drain Ni-plated Brass 9 (a,b) Pressure gauge 1.4301 EN10088-3 + Glycerine -- Pipe 1.4401 EN10088-3 -- Fittings 1.4401 EN10088-3 -- Pressure unions 1.4401 EN10088-3 + Brass 2/3
ST M3770 ENG STA R1 04/17 TYPICAL INSTALLATION TYPICAL APPLICATION Critical user 3/3
ST M3771 ENG STA R1 04/17 M3771: SOLENOID CONTROLLED / ELECTRICALLY POSITIONED VALVE - STEP BY STEP VALVE DN50 to DN250 OPERATING PRINCIPLE The valve is equipped with two solenoids, both configured standard as NC, which means that in absence of power the main valve remains locked in the last position setting. A remote control system reads flow, level, or pressure sensors and emits electric impulses to move a solenoid that reatains a volume of fluid in the main chamber and position the valve as required. The valve can be supplied as NC or NO according to the application. This valve is typically used in networks or water supplies with direct acting remote control on the valve, capable of monitoring and maintaining an adjustable set point. The on-off function is managed by remote control capable of stepped opening and clossing of the valve to prevent excess speed and surge. It offers a very simple solution in all contexts requiring flow, level, or pressure control rather than a motorized control valve. ADDITIONAL FEATURES AVAILABLE: pressure reducing function (in parallel); minimum inlet pressure maintenance (in parallel or in line); flow rate control (flow limiter) in parallel or in series; check function to prevent backflow if the outlet pressure rises higher than the inlet pressure; main valve fully open for reverse flow if outlet pressure is higher than inlet pressure; on-off float control function (safety control); on-off altitude control function (safety control); two way flow; IP68 available for the solenoids. 1/3
ST M3771 ENG STA R1 04/17 M3771 CIRCUIT LAYOUT 8a 3 6a 4a 5 4b 6b 2e 8b 7a 2b 2a 2c 2d 7b 1 ITEM DESCRIPTION MATERIALS 1 Main valve GJS400-15 EN1563 2 (a,b,c,d,e) Isolating ball valve Ni-plated Brass 3 Y - Strainer with calibrated orifice 1.4401 EN10088-3 + Brass 4 (a,b) Bidirectional needle valve 1.4401 EN10088-3 + Brass 5 Position indicator with manual venting cock Brass + Hardened glass 6 (a,b) Solenoid valve Brass 7 (a,b) Gauge holder with drain Ni-plated Brass 8 (a,b) Pressure gauge 1.4301 EN10088-3 + Glycerine -- Pipe 1.4401 EN10088-3 -- Fittings 1.4401 EN10088-3 -- Pressure unions 1.4401 EN10088-3 + Brass 2/3
ST M3771 ENG STA R1 04/17 TYPICAL INSTALLATION TYPICAL APPLICATION Critical user 3/3