MACKVALVES
Automatic Control Valves for Water Management
Mack is one of Australia’s and Asia Pacific’s leading manufacturers of Automatic Control Valves (ACV) for the management of water and fluids that are non-injurious to construction.
> PRESSURE REDUCING
Keep downstream pressure constant with a pilot control valve. Sensing the downstream pressure, it activates the ACV to allow flow when the downstream pressure is lower than the spring pressure, setting on the pilot valve.
> PRESSURE REDUCING & CHECK
Prevent back-flow when the downstream pressure exceeds the upstream pressure. The valve closes slowly to prevent water hammer and to protect the system from damage.
> PRESSURE SUSTAINING & PRESSURE RELIEF
Eliminate problems with sustaining back pressure, pressure relief and uploading functions in bypass systems. Its rapid opening capability helps to maintain steady line pressure, while its slow closing prevents surges and makes it easy to set a maximum flow rate.
> PRESSURE SUSTAINING & CHECK
Maintain constant upstream pressure to close system tolerances by relieving the excess pressure downstream. The valve closes and positively prevents return flow, over-pumping and pump cavitation caused by excessive downstream demands.
> RATE OF FLOW
Maintain maximum allowable flow rate to prevent the lowering of supply pressure and limit the primary water supply to a pre-set flow, which is actuated by differential pressure.
> ALTITUDE
Control high water levels in reservoirs. The non-throttling valve allows the reservoir to fill and close when it reaches its setpoint at top water level. Add on features include back pressure sustaining, rate of flow, solenoid shut-off, pressure reducing, closing/opening speed control, position indicator and delayed opening.
> PUMP CONTROL
Prevent reverse flow regardless of the solenoid or diaphragm assembly position using the line pressure for its operation. The pump starts against a closed valve and regulates both the opening and closing rates which can be adjusted and controlled separately.
> FLOAT LEVEL CONTROL
On/Off Float Valves are non-modulating valves that accurately control the liquid level in tanks. These valves are designed to open fully when the liquid level falls and close drip-tight at top water level. Valves can be supplied with a simple cistern cock pilot or a bi-level control that allows adjustment of the opening-closing level.
> MODULATING FLOAT CONTROL
Equalise variations in supply and demand to maintain a constant level in a reservoir. Can be balanced to either the in-flow or the out-flow rates. The addition of a pressure sustaining valve means a minimum pressure can be sustained.
> PUMP CONTROL AND CHECK VALVE
Control surges in a pipeline on the discharge side of a booster pump. By starting and stopping against a closed valve, it’s possible to prevent reverse flow, regardless of solenoid or diaphragm assembly position and to regulate both the opening and closing rates to protect the system.
> DUAL-STAGE PRESSURE REDUCING
Get automatic control dual pressure with the application of a pilot system with two independent reducing pilots, with a calibrated orifice plate or a three-way solenoid. As the flow increases, so does the flow across the orifice plate until it reaches the set point of the second pilot, causing the valve to switch over and control at higher pressure.
> SOLENOID ON/OFF
Solenoid-controlled Automatic Control Valves are available with a range of three-way or two-way solenoid pilot valves of various voltages, and open or closed when energised.
