GU-H series self sealing pressure pipeline filter

The GU-H series self sealing pressure pipeline filter is an online purification device designed specifically for the middle section of hydraulic system pressure pipelines. It adopts a direct connection layout with a self sealing quick opening structure and is installed in series on the pressure pipeline between the hydraulic pump outlet and the control component. It completes high-precision impurity interception of the oil under pressure operation of the system, avoiding faults such as valve core jamming and throttle hole blockage caused by gum, carbon residue, and hard particles in the oil. It is the core protective component in medium and high pressure hydraulic systems to ensure the cleanliness of the pressure oil circuit and maintain the continuous and stable operation of the system. It is suitable for use in various industrial hydraulic systems with a nominal pressure not exceeding 32MPa.

The GU-H series self sealing pressure pipeline filter adopts a high-strength aluminum alloy or carbon steel cylinder body, with a quick opening self sealing end cap on the top, which does not require complete disassembly of the connection thread between the filter and the pipeline. Simply loosen the end cap lock to quickly remove the filter element for maintenance; Internally integrated differential pressure transmitter, when the filter element is blocked and the pressure difference between the inlet and outlet reaches 0.35MPa, it can automatically send a switch signal to remind the operation and maintenance personnel to handle it in a timely manner; Equipped with a combination type bypass check valve, the bypass valve automatically opens when the pressure difference reaches 0.4 MPa to ensure uninterrupted oil flow in the oil circuit. When replacing the filter element, the check valve automatically closes the downstream oil circuit to prevent a large amount of oil from flowing back and overflowing in the pipeline, and to prevent external air and impurities from entering the system in the opposite direction; The filter element adopts a new type of synthetic fiber filtration material, which has strong oil flow capacity, small original pressure loss, and large pollutant holding capacity. The filtration accuracy covers the range of 3 μ m to 40 μ m, and the filtration efficiency meets the ISO cleanliness standard of general industrial hydraulic systems.

The GU-H series self sealing pressure pipeline filter is widely suitable for purifying the middle section of pressure pipelines in various medium and high pressure hydraulic systems. It can be used in hydraulic stations of metallurgical equipment, hydraulic circuits of light industry automation production lines, hydraulic systems of engineering machinery vehicles, lubrication hydraulic units of mining equipment, hydraulic power stations of injection molding machines, hydraulic control systems of machine tools, and other working conditions. It is particularly suitable for continuous operation hydraulic equipment that requires frequent maintenance of filter elements and does not allow long-term shutdown. It can effectively intercept mechanical impurities mixed in the pressure oil circuit and gum and carbon residue generated by oil oxidation, greatly reducing the probability of abnormal wear of hydraulic valves, hydraulic motors and other components.

Compared to conventional non self sealing pressure pipeline filters, the fast opening self sealing structure of the GU-H series self sealing pressure pipeline filter significantly reduces the time required for filter element replacement. Operation and maintenance personnel do not need to disassemble the pipeline interface or completely drain the pipeline oil. A single person can complete the filter element replacement operation in a few minutes, greatly reducing equipment shutdown losses; The dual protection design of the combined bypass check valve can not only ensure uninterrupted oil circuit under extreme conditions of filter blockage, but also prevent downstream clean oil from being contaminated by backflow during maintenance, making the system cleanliness more stable; The entire series adopts standard pipe or flange interfaces, which can directly replace the majority of pressure pipeline filters of the same specifications on the market, without the need to modify the original pressure pipeline, and has strong adaptability; The pollutant carrying capacity of the filter element far exceeds that of ordinary filters with the same precision, and the replacement cycle under normal working conditions is longer, resulting in lower long-term operation and maintenance costs.

The differential pressure transmitter frequently triggers an alarm. First, check whether the system has been operating at an over rated flow rate for a long time. If the flow parameters are stable, it indicates that the filter element has reached its blockage limit. After stopping the machine to release pressure, remove the filter element and replace it with a new one of the same precision to restore normal operation; If there is oil leakage at the position of the end cap, check whether the sealing rubber ring at the end cap has aged and deformed due to long-term oil immersion. Replace the oil resistant seal of the same specification and tighten the end cap fasteners evenly in diagonal order to restore the seal; After replacing the filter element, there was a brief pressure instability in the downstream oil circuit. Check if there were any small impurities attached to the end face of the check valve and if there was slight jamming. Jogging the circulating oil in the system for a short period of time can flush the impurities back into the filter, and the oil circuit pressure can be restored to stability; The oil flow rate is significantly lower than the design value. Check whether there is a large amount of gum sludge deposited on the surface of the filter element. Remove the filter element and thoroughly clean the residual impurities in the pores with a special cleaning agent. The oil flow capacity can be restored to its initial state.