Applications SEVEN

SIPOS actuators with UPS
SIPOS Aktorik can provide single phase actuators (with 3-phase asynchronous motors) for standard and modulating duty. Low power consumption and proven reliability in the SIPOS
actuator, combined with a single phase power supply, allows low cost UPS systems to be used in 230 V single phase systems: this ensures emergency operation in the event of a pipe break.
Additionally, mains water systems are protected against potentially damaging pressure surges (water hammer).

Surge prevention in ultrafiltration plant
SIPOS actuator in use at the Carrum Ultrafiltration Plant, a part of the Melbourne Metropolitan Water Purification System, where the actuator’s variable speed closure capability avoids problems associated with water hammer generated during valve shut-off.

Water pumping from bore holes
water is pumped from a number of bore holes into a collection tank and then onto a holding tank. Three pumps are each equipped with 12” butterfly valves to control the water flow.

In order to protect the valve seats from damage caused by water cavitation, or the pumps from running dry in the event of water loss, the butterfly valves must be capable of rapid closure. Such operation creates huge hydraulic forces, known as water hammer. These forces are sufficient to cause significant pipework damage and must be avoided.

Avoiding water hammer
The ECCV Southern Booster Pump Station in Colorado is fitted with high volume pumps and uses pump check valves for flow control.

To avoid water hammer and potentially serious system damage the application requires a linear flow characteristic.

The design challenge is obtaining linear flow from a ball valve which typically exhibits non-linear flow characteristics as it is closed/opened.

Sewage pumping
Wyong ’s sewerage system consists of sewers, pumping stations and pump mains to transfer predominately liquid waste to the treatment works. Within the pumping stations, in addition to the dual pump system, sluice valves are used to control the flow of effluent.
Rapid closure of the pump discharge valve during normal operation will cause water hammer to occur. The hydraulic forces generated during rapid closure are sufficient to cause damage to pipework and therefore must be prevented. In addition, the installation of pump, pipework and valves underground means that access is limited.

Linear flow control with smooth pumping operation
Kiva Pumping Station, located in Albuquerque, New Mexico, is connected to an existing part of the water supply system, but has experienced growing demand and must significantly increase capacity.
The valve/actuator system must manage water surges during pump start-up and shut-down and provide linear water flow control during normal operation.
In addition, the use of advanced electrical design incorporating inverter technology allows the use of simple single phase UPS supplies to control the valve in event of power failure.

Non-potable water pumping
The non-potable water pumping station located in Erie, Colorado distributes treated water from a storage reservoir to the town’s irrigation system and to Boulder Creek in the Rocky Mountains.
The valve / actuator system must manage water surges during pump start-up and shut-down, provide linear water flow control during normal operation and protect the pump in the event of power failure.
In addition, the use of advanced electrical design incorporating inverter technology allows the use of simple single phase UPS supplies to control the valve in event of power failure.

Lower Molonglo waste water treatment plant
The Lower Molonglo treatment plant is situated close to Canberra in Eastern Australia and treats water from a wide catchment area.

An actuator on one of the remote network supply lines, located a 20 minute drive south of the treatment works, required replacing with a more sophisticated valve control.