A pressure tank (or pressure vessel or bladder) is a metal container that can vary in size from 24 litres up to 1000L. Inside the tank there is a rubber diaphragm that divides the tank into 2 halves, the wet half and dry half.
The dry section has a tyre valve attached to it and compressed air is pumped into it until the pressure is at a certain level, which we will talk about later. The wet half has a metal (or sometimes plastic) threaded outlet attached to it and this is connected to the pipework for a pressure pump.
Pressure tanks are generally made out of steel. The modern steel models are cheap and low maintenance and the diaphragm is set into them. The quality brands generally last but they can be prone to poor water quality and being out in the weather, especially near the coast. The heavier duty option is a fibre glass tank. These are generally more expensive and range from a 60L up to a 1000L model. The best part of these is that the bladder is generally replaceable if it bursts and the tank itself lasts for years as it can’t rust.
How Does A Pressure Pump Work?
A pressure pump is a pump with some sort of electrical switch on it which turns the pump off when the system pressure reaches a pre-set point, sometimes this is fixed and sometimes it is adjustable. When your pressure pump is running and a tap on the system is open, the water flows out of the tap.
When the tap shuts, then the water stops flowing and the pressure in the system builds. When the pressure reaches the “off” setting of the switch or controller, then this turns the pump off and the pipes remain pressurised. As water is not very compressible and pipes only store a small amount of water, when you open the tap again the pressure drops very quickly and only a small amount of water comes out. When the pressure drops to the “on” setting of the switch, then the pump turns on again and starts pumping.
For more info contact wates pressure vessel supplier in uae or call us at +971 4 252 2966