What is a membrane pump?

The

membrane pump is a positive pressure pump that uses a flexible membrane to pump fluids. The pump uses a number of control valves to ensure that the liquid can only travel in one direction through the chamber. The diaphragm itself can be extended and repaired by means of pressure air or fluids or engines. In the first part, the membrane is towed from the input/output valves to increase the volume of the chamber. This increase in volume results in a reduction in the pressure in the chamber due to the input and output, creating a vacuum effect that attracts the fluid inward. Check the valves on the input and output connections to ensure that the liquid can only enter the chamber via the input connection. The volume in the chamber then decreases and pressure increases. The chamber fluid is pushed through the output connection. As with the input cycle, the connected control valves allow the fluid to leave the chamber only through the correct connection.

In most cases, the membrane itself is sealed on the sides of the pump, which completely separates the chamber from the control mechanism. Because the mechanism does not actually move the membrane, but rather stretches and contrasts, there is little friction in the pump itself. This feature of the diaphragm pump distinguishes it from other types in that it allows the pump to dry for a longer period of time without damage. This, along with their flexible patterns, allows the use of membrane pumps in anything from heavy industrial applications to artificial hearts.

There are two primary types of drivers for membrane pumps. The first uses pressure air or fluid to expand or close the membrane. Increasing the pressure on the pump drive side is pushing the membrane into the chamber, increasing the pressure on the fluid in the chamber and promoting it through the output. Similarly, lowering the pressure on the drive side causes the diaphragm to bend from the chamber.

The second type of driver uses mechanical device connectedto the membrane to push and pull into and out of the chamber. The effect in the chamber is the same regardless of the type of driver used. Only the mechanism used to control the pulsation of the membrane is different.