Are there two hydraulic fluid inlets in the double-acting cylinder?

Release Time :

2025-01-24

Double-acting hydraulic cylinders have dual inlet connections for the hydraulic fluid. As with single-acting hydraulic cylinders, one inlet will allow fluid to flow into the cylinder, causing the piston rod to extend outward, thus completing the designed work.

Double acting cylinder

However, instead of relying on springs or gravity to retract the piston, double-acting hydraulic cylinders use hydraulic fluid. So first, the fluid flow to the piston extension inlet is stopped. Then, hydraulic fluid is pumped into the second inlet at the other end of the cylinder, causing the piston rod to retract. At the same time, the hydraulic fluid behind it is pushed back into the inlet.

Double-acting hydraulic cylinders offer more flexibility when controlling the extension and retraction of the piston. It is easy to move the piston back and forth and ensure that the plunger can be fully retracted to its original position.

In addition, you can complete the work faster with a double-acting hydraulic cylinder because you don't have to wait for gravity or a spring to retract the piston.

When the push rod of a double-acting hydraulic pump is pushed forward, it compresses the fluid inside the pump. This causes the hydraulic fluid to be pushed through a check valve into one port of the cylinder, which pushes the piston forward, completing the machine.

Double acting cylinder

When the push rod returns to its initial position, the hydraulic pump generates negative pressure, causing the hydraulic oil to be sucked into another oil port of the hydraulic cylinder through another one-way valve. At this time, the piston of the hydraulic cylinder is pushed backward.


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