With the right material consideration, diaphragms can seal over a wide range of pressures and temperatures without needing lubrication or maintenance. They do not leak, offer little friction, and can be constructed for low pressure sensitivity. Diaphragm Pumps deliver a hermetic seal between the drive mechanism and the compression chamber, allowing the pump to transfer, compress, and evacuate the medium without a lubricant.Īn elastomeric diaphragm can be used as a versatile dynamic seal that removes many of the limitations found with other sealing methods. This action is similar to that of the cylinder in an internal combustion engine. Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. When the chamber pressure later increases from decreased volume (the diaphragm moving down), the fluid previously drawn in is forced out. When the volume of a chamber of either type of pump is increased (the diaphragm moving up), the pressure decreases, and fluid is drawn into the chamber. The diaphragm(s) again are flexed, causing the volume to change.
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