AVK Control Valves

Water is a scarce resource that we need to protect. We need to secure water for the next generations and a growing population. Control valves are regulating valves. They maintain certain pressure, flow or level regardless of changes in the supply network, and therefore help reduce water losses and contribute to efficient water supply. AVK supplies a complete range of control valve solutions for water utilities. Control valve solutions can reduce energy consumption for pumping by allowing for a lower pressure in general and especially during off-peak hours

Consequences of water loss

For water utilities, ‘non-revenue water’ is water that has been produced but “lost” before it reaches the customer because of leaks, theft or metering inaccuracies and is a source of unwanted cost. From an environmental perspective, the significant amounts of precious water that are lost, and the energy used to treat and distribute the water lost is also wasted. 

So how can control valves help?

Automatic control valves are used to obtain efficient  flow management and pressure resulting in reduced: 

– water loss through leakages

– risk of water hammer and pipe bursts

– disruption to consumer

– Minimized risk of contamination

increased savings for water companies

Main Features – AVK control valves
The safe choice, offering accurate regulation, easy maintenance as well as long durability:

– All non-coated metal parts of stainless steel AISI 316 as standard.
– Fusion bonded epoxy coating (300 micron) – GSK approved.
– AVK’s own, drinking water approved, rubber compounds
– Modular pilot system to enable easy fitting to other applications without replacing the valve.
– Independent adjustment of the opening and closing speed for full control.
– Parabolic plug design to provide precise regulation and stability at low flow.
– Large diaphragm to secure fast reaction to minor changes in pressure.
– Lifted seat to prevent damage caused by cavitation inside the valve body.
– AVK design, manufacture and 100% pressure test

Pressure Control – reduce or sustain:-

1- Pressure reducing control valves.

A pressure reducing control valve will automatically reduce a higher inlet pressure to a lower outlet pressure – regardless of changes in flow rate or inlet pressure.

The pressure reducing pilot senses the outlet pressure through the connection on the valve outlet port. Under flowing conditions the pressure reducing pilot reacts to small changes in the outlet pressure and controls the valve position by modulating the pressure in the control chamber. When the outlet pressure changes according to the set-value of the pilot, the pilot modulates and ensures pressure control.

Example: The pressure is 7-8 bar, appropriate to supply the consumers in area A but too high for the consumers in area B. Solution – a pressure reducing control valve is installed to reduce the pressure to 3 bar in area B.