Ball Check Valves

operation and characteristics of the ball check valve

A ball check valve is the check valve which allows forward flow in the open position to and blocks reverse flow in the closed position. And it should be mentioned that the ball check valve is exactly different from the ball valve, which is a different type of valve in which a ball acts as a controllable rotor to stop or direct flow. The ball check valve’s featured part is the movable part to block the flow, which is named the spherical ball. In most cases, the ball in the ball check valve is spring-loaded to help keep it shut. For those designs without a spring, reverse flow is required to move the ball toward the seat and create a seal. The materials available to manufacture the ball of the ball check valve would be metal, as well as other resources such as the artificial ruby.

Ball check valve is often very small, simple and cheap. Similarly to other types of the check valve, the ball check valve is commonly used in liquid or gel minipump dispenser spigots, spray devices, some rubber bulbs for pumping air, etc., manual air pumps and some other pumps, and refillable dispensing syringes. Besides, small inlet and outlet ball check valve is commonly applied to the high pressure pumps and similar applications with both balls and seats made of artificial ruby, for both hardness and chemical resistance. And they are all replaceable under the consideration of the prolong use. Therefore, they are sometimes placed in a small plastic body tightly-fitted inside a metal fitting which can withstand high pressure and which is screwed into the pump head.