Expect easy maintenance and long durability with AVK Control Valves!
Why use control valves and how do they work?
Water security is a must. We must preserve the limited supply of water for the sake of future generations and growing populations. Control valves can regulate pressure, flow, and level regardless of changes in the supply network which can assist to reduce water losses and contribute to effective water supply management.
How can control valves help?
AVK offers wide range of Automatic control valves to obtain efficient pressure and flow management that ensure pressure management resulting in:
- Reduced water loss through leakages
- Reduced risk of water hammer and pipe bursts
- Reduced energy consumption as less water needs to be pumped through the system.
- Reduced disruption to consumers
- Reduced maintenance costs and depreciation due to longer lifespan of the network.
CONSTANT FLOW CONTROL VALVE
A CONSTANT FLOW CONTROL VALVE automatically monitors the flow and regulates if required, to secure that the flow does not exceed the maximum allowed flow regardless of changes in the supply pressure.
The constant flow pilot detects the pressure drop across an orifice plate. The constant flow pilot and the main valve will both be fully open when the flow is low and the pressure drop is less than the pilot setpoint. The valve begins to regulate the maximum flow according to the setpoint if the flow is high and the pressure drop rises over the setpoint, ensuring that the flow does not exceed the maximum allowable flow.
PRESSURE CONTROL VALVE – REDUCE OR SUSTAIN
A PRESSURE REDUCING CONTROL VALVE has an independent variations in flow rate or inlet pressure, automatically reduces a greater inlet pressure to a lower output pressure.
Through the connection on the valve output port, the pressure-reducing pilot measures the outlet pressure. Under flowing conditions, the pressure lowering pilot responds to minute variations in the outlet pressure by regulating the pressure in the control chamber, which controls the valve position. The pilot modulates to maintain pressure control when the outlet pressure varies in accordance with the set-value of the pilot.
A PRESSURE SUSTAINING CONTROL VALVE automatically maintains a minimum specified inlet pressure by relieving excess regardless of changes in flow rate pressure.
The valve position is controlled by the pressure sustaining pilot, which responds to slight variations in the incoming pressure. The main valve closes or modulates to maintain a minimal inlet pressure if the inlet pressure drops below the preset point. The sustaining valve typically permits flow while maintaining a minimal back pressure at the inlet. When pressure rises above a certain set-point, the relief valve only opens, remaining closed in its default state.
Control valve variants and configurations
We also offer control valve variants such as:
Surge anticipation valve which automatically opens to relieve overpressure. It protects the pipe system against pressure surges, primarily occurring at pump startup or during breakdowns.
Altitude valve which automatically controls the water levels in tanks or reservoirs using the water column as refence. It has 2 types:
- One-way: As soon as the water level drops below the predetermined level, the altitude pilot detects it and opens to replenish.
- Two-way: Similar to one-way, but moreover, if the intake pressure is lower than the tank/reservoir pressure, the valve opens to allow the flow to return.
Float level valve which automatically controls the water levels in tanks or reservoirs using a remote ball float as pilot. It has 2 types:
- Modulating: The modulating float is fitted remotely and regulates the reservoir or tank level at a certain fixed point. The valve tightly closes at the specified level and opens if more filling is required.
- Non- modulating: The valve remains closed until the tank/reservoir level reaches the lowest permitted set point thanks to the non-modulating float. The control valve then fully opens to refill until it reaches the highest permissible set point, at which time it closes.
Solenoid control valve which automatically closes or opens the main valve
Dual solenoid control valve electrical signals used to automatically control. The control valve provides complete pressure, flow, and level regulation.
Multi-function and solenoid override The range also includes control valves with several functions, such as ones that combine pressure decreasing and pressure sustaining functions. In addition, a lot of the variations come with solenoid override, which uses an electric signal to either open or close the primary valve.
