Simple structure and reliable sealing It adopts hermetic head faces with high degree pottery and corrosion resistance for opening and closing. It combines with Service, Backwash, Brine & Slow Rinse, Brine Refill and Fast Rinse. Two ways for installation Use side-mounted connector to change the valve from top-mounted to side-mounted. Screen is moveable. No water pass the valve during regeneration in single tank type Brine refill controlled by electronic ball valve. During service, electronic ball valve will control to start the brine refill. In order to short the regeneration cycle time. For filtration system Drain outlet is the same size as water outlet. Block the brine line connector change the valve to N77B filter valve. Manual function Realize regeneration immediately by pushing “Manual/Return” at any time. Long outage indicator If outage overrides 3 days, the time of day indicator “‡” will flash to remind people to reset new time of day. The other set parameters do not need to reset. The process will continue to work after power on. LED dynamic screen display The stripe on dynamic screen flash, it indicates the control valve is in service, otherwise, it is in regeneration cycle. Buttons lock No operations to buttons on the controller within 1 minute, button lock indicator light on which represent buttons are locked. Before operation press and hold the “Up”and“Down” buttons for 5 seconds to unlock. This function can avoid incorrect operation. It can choose time clock type or meter type by program selection Through the switch in control board ((Application refer to Page16) to realize time clock type by day or by hour and meter type. (Attention: after adjust the switch, the valve should be cut off the power then connect again. Meter type valve have one more flow meter and cable then time clock type valve.)