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    STARFLO 0.75 Liters Marine RV Water Pump And Accumulator Tank System

    STARFLO 0.75L Solar Pressurized Accumulator Tank For RV Marine  FEATURES & BENEFITS •  Smoother flow, quieter water systems •  Internal rubber membrane eliminates maintenance and allows universal mounting. •  Better control of hot water temperatures •  Simply fitted to new or existing systems •  Longer pump life, lower battery drain •  Snap-in port fittings •  Port Size:1/2” MNPT inlet and outlet ports • Application: RV, Boat,Marine SPECIFICATION OF WATER ACCUMULATOR TANK: Model Internal VoluInme Pre-charge Pressure Max Operating Pressure Air Fill Valve SFAT-125-075 0.75 L 23.5 OZ 10 PSI 0.7 BAR 125 PSI 8.6 BAR standard automotive style tire valve Read More +
  •  Accumulator Tank

    STARFLO 0.75L Solar Pressurized Accumulator Tank For RV Marine

    STARFLO 0.75L Solar Pressurized Accumulator Tank For RV Marine Read More +
News & Events
What is Diaphragm Pump

2017-03-14

A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm (check valve, butterfly valves, flap valves, or any other form of shut-off valves) to pump a fluid.


There are three main types of diaphragm pumps:


Those in which the diaphragm is sealed with one side in the fluid to be pumped, and the other in air or hydraulic fluid. The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease. A pair of non-return check valves prevent reverse flow of the fluid.

Those employing volumetric positive displacement where the prime mover of the diaphragm is electro-mechanical, working through a crank or geared motor drive, or purely mechanical, such as with a lever or handle. This method flexes the diaphragm through simple mechanical action, and one side of the diaphragm is open to air.

Those employing one or more unsealed diaphragms with the fluid to be pumped on both sides. The diaphragm(s) again are flexed, causing the volume to change.

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. When the chamber pressure later increases from decreased volume (the diaphragm moving down), the fluid previously drawn in is forced out. Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. This action is similar to that of the cylinder in an internal combustion engine. 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.


An elastomeric diaphragm can be used as a versatile dynamic seal that removes many of the limitations found with other sealing methods. They do not leak, offer little friction, and can be constructed for low pressure sensitivity. With the right material consideration, diaphragms can seal over a wide range of pressures and temperatures without needing lubrication or maintenance.

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