This article mainly introduces:

Dominica hydraulic cylinder,pressure retaining cylinder manufacturer,pressure retaining cylinder

(Dominica pressure retaining cylinder,produced by Hengyu Hydraulic Cylinder Factory）

pressure retaining cylinder are widely used in Dominica，because of no need for deceleration device，long service life，smooth movement.So our company has designed pressure retaining cylinder for customers from Dominica.

Introduction to pressure retaining cylinder:

When the pressure retaining cylinder thrust is insufficient, check the hydraulic circuit for leaks. Including leakage of valves and hydraulic lines. The inspection method is to check and eliminate the leakage of the hydraulic connection line by manipulating the reversing valve. Also consider the relief valve. If the relief valve enters the dirt and jams the spool, so that the relief valve is normally open, the hydraulic oil will flow directly back to the tank through the relief valve bypass, resulting in no oil in the pressure retaining cylinder. If the load is too large, although the regulating pressure of the relief valve has reached the maximum rating, the pressure retaining cylinder still cannot get the thrust required for continuous action without action. If the regulating pressure is low, the pressure is insufficient to achieve the required vertebra force, which is manifested as insufficient thrust. Check and adjust the relief valve at this time.

The "O" ring can be used as an auxiliary seal inside the pressure retaining cylinder, and the elastic force of the "O" ring makes the sealing slip ring close to the sealing surface, generating sealing pressure to achieve sealing. When the internal hydraulic pressure increases, the "O" ring will further deform and squeeze the slip ring, thereby increasing the sealing pressure and improving the sealing performance. The structure has the characteristics of low friction coefficient, good wear resistance, automatic compensation for wear and absorption of hard particles in the pressure retaining cylinder, and can be completely sealed.

The definition of the minimum stable speed refers to the minimum movement speed of the pressure retaining cylinder without crawling phenomenon when the full load is moving, it has no uniform indicator, and the pressure retaining cylinder that undertakes different work has different requirements for the minimum stable speed.

pressure retaining cylinder hydraulic oil selection: The recommended working oil viscosity of the pressure retaining cylinder is 10 ~ 110cSt (1.8 ~ 15E), ISO VG46 hydraulic oil. The normal working oil temperature is 10 ~ 70℃, and the ambient temperature is in the range of -20 ~ 80℃. When the ambient temperature and service temperature are low, the hydraulic oil with lower viscosity can be selected.

Answers to some questions about pressure retaining cylinder:

How big is the motor and oil pump for the 80 cylinder?
Pump motor selection is not only related to cylinder diameter but also speed system, it is recommended to provide system diagram and speed requirements, generally speaking, most of the 80 cylinder on the market is equipped with 3-4KW motor, 10-20 oil pump.

Why is the hydraulic cylinder of the larger excavator arm upside down?
The weight of the excavating arm of a large excavator will be very heavy, and an oil cylinder has two cavities, one is a rod cavity, and the other is a rodless cavity. The lifting force of the excavator is the product of the ortho-projection area of the piston rod cavity by the oil pressure, so the strength of the rodless cavity is much greater than that of the rod cavity. And the parallel bars with the piston rod facing down are also conducive to assembly and future maintenance. So a large excavator has to keep the cylinder facing down.