A Complete Guide for Equilibrium Ball Valves

Typically, water will only enter a ball valve from one side of the washer. The float lifts the float arm as the water level in the cistern rises, forcing a washer onto the valve seating and sealing it. Therefore, the float’s buoyancy must be adequate to counteract the force of the oncoming water.

In this regard, there is a distinct difference in how Equilibrium Ball Valves operate. Through an equilibrium ball valve, water can flow from the inlet to the outlet of the washer. Doing so maintains the water pressure on both sides at a constant level. With the water pressure on either side of the washer balanced, the float’s upward force need only be sufficient to lift the float arm. The power of the incoming water does not force it to function.

An equilibrium ball valve may be a good investment if you live in a region with high water pressure or your cistern’s inlet line is particularly large. Additionally, they have been utilised to counteract the effects of water hammers.

Functions of an Equilibrium Float Valve

  • A high-quality valve that can be fitted to the tank body
  • A range of high-quality, high-flow Equilibrium Float Valves that are easy to use, durable, and can reliably adjust to changes in the water supply pressure.
  • One size of the seat and one size of ball float will fit any working pressure up to the maximum recommended of 5 bar. Even at these pressures, the center and the hydraulically balanced closing action give a fast, quiet, and smooth shut-off.
  • Equilibrium Float Valves come in sizes from 1/2″ to 4″ and have a BSP male threaded inlet stub.
  • Equilibrium float valve with a fully adjustable drop arm that can be installed into the tank body or raised float valve housing to provide an AB air gap when a screened spillover weir is used. Equilibrium float valves have a wide selection of drop arms to choose from.


  • The range can handle pressures up to 10 bars while closing quickly, quietly, and smoothly.
  • Male British Standard Pipe (BSP) threaded tail for use with a wide variety of pipe threads.
  • The valve’s body is made of Gunmetal, which doesn’t rust so it will work well for many years.
  • High strength for installation and operation and corrosion resistance for long life result from meticulous design and material selection.
  • No need to watch or control. Automated regulation lies at the heart of level control’s operation.
  • Water will stop flowing when the right level is reached, so don’t let it overflow or fill up too much.
  • It is cost-effective because no electricity is needed. Useful for monitoring water storage levels in locations without access to electricity.


Mechanical float valves with a ball-shaped float are called Equilibrium Ball Valves, and they are used to regulate the water level in storage tanks and reservoirs. These valves regulate levels in gravity mains that are a few hundred feet to a few thousand feet in length. As the water level in a tank decreases, the float travels downward, increasing the angle of the valve arm, which opens the valve and allows water to flow through. When the water level in the tank rises, the float moves upward and closes the valve.

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