1. Introduction
We specialize in supplying high-quality bladder accumulators, covering the full range of NXQ series models to meet the diverse needs of industrial hydraulic systems. Our product lineup includes two main categories: NXQ-AB (double bladder structure) and NXQ-A (single bladder structure), with multiple specifications differentiated by pressure rating (10MPa, 20MPa, 31.5MPa), volume (0.4L to 200L), and connection type (L-type, F-type) as well as accessory configurations (A, BH, EH). The complete model list includes but is not limited to NXQ-AB-0.4/31.5-L-A, NXQ-A-10/20-F-BH, NXQ-AB-100/10-L-EH, and all other models listed in the original specification. These accumulators are widely used in hydraulic systems across various industries, serving as core components to stabilize system pressure, absorb hydraulic shock, compensate for leakage, and store energy—effectively improving system efficiency and extending the service life of hydraulic equipment.
Targeted at different user segments, we provide tailored solutions: for heavy machinery (such as excavators, cranes) users, we offer high-pressure, large-volume models (e.g., NXQ-AB-200/31.5-L-EH) with strong shock absorption and stable energy storage; for precision hydraulic equipment (such as CNC machine tools, hydraulic presses) users, we supply small-volume, high-precision models (e.g., NXQ-A-0.4/10-F-A) to ensure pressure stability and reduce system fluctuation; for harsh working environment users (such as outdoor engineering, marine equipment), we provide corrosion-resistant, sealed models (e.g., NXQ-AB-50/20-F-BH) to adapt to extreme temperature and humidity conditions. Our core goal is to solve the pain points of users in hydraulic system operation, such as unstable pressure, frequent equipment failure, and high energy consumption, through professional product configuration and technical support.
2. Product Overview
2.1 Core Purpose
The NXQ series bladder accumulator is a key component in hydraulic systems, designed to achieve five core functions: pressure stabilization, shock absorption, energy storage, leakage compensation, and thermal expansion absorption. Specifically, it can store excess hydraulic energy when the system pressure is higher than the set value, and release the stored energy when the system pressure drops to supplement the pressure loss; it can absorb pressure pulses and hydraulic shocks generated by the start-stop of hydraulic pumps, valve switching, and load changes, avoiding damage to pipelines, valves, and other components; it can compensate for the volume leakage of the hydraulic system during long-term pressure holding, reducing the frequency of pump start-up and saving energy; at the same time, it can absorb the volume expansion of hydraulic oil caused by temperature rise, preventing excessive system pressure and ensuring safe operation. These functions are indispensable for improving the reliability, stability, and energy efficiency of hydraulic systems in various industrial fields.
2.2 Function Description
1. Pressure Stabilization: Maintain the system pressure within a set range, reduce pressure fluctuation caused by load changes or pump operation, ensure the stable operation of hydraulic actuators (such as cylinders, motors), and improve the precision of equipment operation. For example, in CNC machine tool hydraulic systems, the NXQ series accumulator can stabilize the pressure of the feed system, reducing tool wear and improving machining accuracy.
2. Shock Absorption and Pulse Damping: Absorb hydraulic shocks generated by sudden load changes, valve rapid switching, or hydraulic pump cavitation, and weaken pressure pulses in the system. This function can effectively protect hydraulic components such as relief valves, check valves, and pipelines from fatigue damage, extending the service life of the entire hydraulic system.
3. Energy Storage: Store the excess hydraulic energy when the system is in the peak pressure period (such as when the hydraulic cylinder is in the holding stage), and release the stored energy when the system is in the low pressure period (such as when the hydraulic cylinder is in the lifting stage), reducing the load of the hydraulic pump, saving energy, and reducing the operating noise of the system.
4. Leakage Compensation: In the long-term pressure holding process of the hydraulic system (such as when the equipment is in the standby state), the accumulator can continuously supplement the volume leakage of the system, avoiding frequent start-up of the hydraulic pump, reducing energy consumption, and extending the service life of the pump.
5. Thermal Expansion Absorption: When the hydraulic oil in the system expands due to temperature rise (such as during long-term operation of the equipment), the accumulator can absorb the expanded volume of the oil, prevent the system pressure from exceeding the safe limit, and avoid safety accidents such as pipeline burst or valve damage.
2.3 Structural Features
The NXQ series bladder accumulator adopts a modular structural design, composed of four core parts: shell (high-strength carbon steel or stainless steel), bladder (nitrile rubber, fluororubber, or ethylene-propylene-diene monomer rubber), valve group (inflation valve, safety valve, check valve), and connection port. Its structural features are as follows:
1. High-Strength Shell: The shell is made of high-quality carbon steel (ST52-3) or stainless steel (304/316L) through hot forging and heat treatment processes, with a tensile strength of not less than 520MPa and a yield strength of not less than 355MPa. It can withstand high pressure up to 31.5MPa, ensuring safe operation under extreme working conditions. The inner surface of the shell is subjected to precision polishing and anti-corrosion treatment, reducing friction with the bladder and preventing rust and corrosion.
2. Wear-Resistant and Sealed Bladder: The bladder is made of high-performance rubber materials according to different working conditions: nitrile rubber (NBR) is used for general hydraulic oil (mineral oil) systems, with good oil resistance and wear resistance; fluororubber (FKM) is used for high-temperature, corrosive hydraulic oil systems (such as phosphate ester oil), with a temperature resistance range of -20℃ to 120℃; ethylene-propylene-diene monomer rubber (EPDM) is used for water-glycol hydraulic oil systems, with good water resistance and low-temperature performance. The bladder adopts an integrated molding process, with no seams, good air tightness, and a service life of more than 8,000 working hours.
3. Integrated Valve Group: The valve group is integrated on the top of the accumulator, including an inflation valve (for filling nitrogen, the pre-charging pressure is 0.6-0.9 times the minimum working pressure of the system), a safety valve (for overpressure protection, the opening pressure is 1.1 times the maximum working pressure), and a check valve (to prevent hydraulic oil from flowing back into the accumulator). The valve group adopts a modular design, which is easy to disassemble, assemble, and maintain, and the sealing performance is reliable, avoiding oil leakage and gas leakage.
4. Diversified Connection Ports: The connection ports are available in L-type (flange connection) and F-type (threaded connection) to adapt to different installation environments and pipeline connection requirements. The flange connection (L-type) is suitable for large-volume, high-pressure models, with strong bearing capacity and stable connection; the threaded connection (F-type) is suitable for small-volume, light-load models, with simple installation and convenient disassembly. The connection port is processed by precision thread rolling, with high precision and good sealing performance.
3. Applicable Working Conditions
The NXQ series bladder accumulator is widely applicable to hydraulic systems in various industrial fields, with strict adaptation to working conditions to ensure optimal performance. The specific applicable conditions are as follows:
1. Pressure Range: Working pressure 10MPa-31.5MPa, pre-charging pressure 0.6-0.9 times the minimum working pressure, suitable for high-pressure, medium-pressure, and low-pressure hydraulic systems.
2. Temperature Range: -40℃ to 120℃ (depending on the bladder material), applicable to both low-temperature environments (such as outdoor engineering in northern China, cold storage equipment) and high-temperature environments (such as metallurgical equipment, industrial furnaces).
3. Hydraulic Oil Type: Compatible with mineral oil, water-glycol, phosphate ester, and other common hydraulic oils, suitable for different industrial fields such as machinery manufacturing, metallurgy, mining, and aerospace.
4. Installation Environment: Suitable for indoor and outdoor installation, can adapt to harsh environments such as dust, humidity, vibration, and corrosion (after special anti-corrosion treatment). It should be installed vertically (bladder upward) to ensure the normal expansion and contraction of the bladder; when installed horizontally, a support frame should be added to avoid deformation of the shell.
5. Typical Application Fields:
- Construction Machinery: Hydraulic systems of excavators, cranes, loaders, bulldozers, etc., used to absorb shock, stabilize pressure, and store energy.
- Machine Tool Industry: Hydraulic systems of CNC machine tools, hydraulic presses, shearing machines, etc., used to stabilize pressure and improve machining precision.
- Metallurgical Industry: Hydraulic systems of rolling mills, continuous casting machines, blast furnaces, etc., used to absorb shock and compensate for leakage.
- Marine Industry: Hydraulic systems of ships, offshore platforms, etc., used to adapt to harsh marine environments and ensure stable system operation.
- Aerospace Industry: Hydraulic systems of aircraft, rockets, etc., used for energy storage and pressure stabilization (high-precision models).
4. Maintenance and Care Suggestions
Scientific maintenance and care can effectively extend the service life of the NXQ series bladder accumulator, reduce failure rate, and ensure the stable operation of the hydraulic system. The following are detailed maintenance suggestions:
1. Regular Inspection of Pre-Charging Pressure: Check the pre-charging pressure of the accumulator every 3 months (for continuous operation systems) or 6 months (for intermittent operation systems). Use a nitrogen pressure gauge to measure the pressure; if the pressure is lower than the set value by more than 10%, supplement nitrogen in time (only nitrogen can be used, and other gases such as air or oxygen are strictly prohibited to avoid explosion risks). When supplementing nitrogen, the system pressure should be released first to ensure safe operation.
2. Bladder Inspection and Replacement: Check the bladder every 12 months. If there are signs such as aging, cracking, wear, or air leakage (judged by rapid pressure drop of the system or oil leakage from the inflation valve), replace the bladder in time. When replacing the bladder, select the same model and material as the original one, and ensure that the inner surface of the shell is clean and free of impurities to avoid scratching the bladder. After replacement, re-charge nitrogen and test the sealing performance.
3. Valve Group Maintenance: Clean the valve group every 6 months, remove impurities and dirt on the valve core and valve seat, and check the sealing performance of the valve. If the valve is worn, stuck, or leaking, disassemble and repair it in time, or replace the valve core and seal ring. The inflation valve should be protected from collision and damage, and a dust cover should be installed when not in use to prevent dust from entering.
4. Shell Maintenance: Regularly clean the outer surface of the shell to remove dust, oil stains, and corrosion. For outdoor or corrosive environments, apply anti-corrosion paint every 12 months to prevent rust and corrosion. Check the shell for cracks, deformation, or oil leakage; if any abnormality is found, stop using it immediately and replace the accumulator to avoid safety accidents.
5. System Matching Maintenance: Ensure that the accumulator is matched with the hydraulic system (pressure, volume, flow rate, etc.). Do not use the accumulator beyond the rated pressure and temperature range. When the hydraulic system is maintained (such as oil change, pipeline cleaning), the pressure of the accumulator should be released first to avoid accidental injury. Regularly replace the hydraulic oil and filter element of the system to ensure the cleanliness of the hydraulic oil (NAS 8-10 grade), which can effectively reduce the wear of the bladder and valve group.
6. Storage and Transportation: When the accumulator is not in use for a long time, release the pre-charging pressure, clean the surface, and store it in a dry, ventilated, and cool place, avoiding direct sunlight, high temperature, and humidity. During transportation, avoid collision, falling, and extrusion, and fix the accumulator with a bracket to prevent deformation and damage.
We supply All models bladder accumulator：
NXQ-AB-0.4/31.5-L-A NXQ-AB-0.4/10-L-A NXQ-AB-0.4/20-L-A
NXQ-AB-0.63/31.5-L-A NXQ-AB-0.63/10-L-A NXQ-AB-0.63/20-L-A
NXQ-AB-1/31.5-L-A NXQ-AB-1/10-L-A NXQ-AB-1/20-L-A
NXQ-AB-1.6/31.5-L-A NXQ-AB-1.6/10-L-A NXQ-AB-1.6/20-L-A
NXQ-AB-2.5/31.5-L-A NXQ-AB-2.5/10-L-A NXQ-AB-2.5/20-L-A
NXQ-AB-4.0/31.5-L-A NXQ-AB-4.0/10-L-A NXQ-AB-4.0/20-L-A
NXQ-AB-6.3/31.5-L-A NXQ-AB-6.3/10-L-A NXQ-AB-6.3/20-L-A
NXQ-AB-10/31.5-L-A NXQ-AB-10/10-L-A NXQ-AB-10/20-L-A
NXQ-AB-16/31.5-L-A NXQ-AB-16/10-L-A NXQ-AB-16/20-L-A
NXQ-AB-20/31.5-L-A NXQ-AB-20/10-L-A NXQ-AB-20/20-L-A
NXQ-AB-25/31.5-L-A NXQ-AB-25/10-L-A NXQ-AB-25/20-L-A
NXQ-AB-32/31.5-L-A NXQ-AB-32/10-L-A NXQ-AB-32/20-L-A
NXQ-AB-40/31.5-L-A NXQ-AB-40/10-L-A NXQ-AB-40/20-L-A
NXQ-AB-50/31.5-L-A NXQ-AB-50/10-L-A NXQ-AB-50/20-L-A
NXQ-AB-63/31.5-L-A NXQ-AB-63/10-L-A NXQ-AB-63/20-L-A
NXQ-AB-80/31.5-L-A NXQ-AB-80/10-L-A NXQ-AB-80/20-L-A
NXQ-AB-100/31.5-L-A NXQ-AB-100/10-L-A NXQ-AB-100/20-L-A
NXQ-AB-125/31.5-L-A NXQ-AB-125/10-L-A NXQ-AB-125/20-L-A
NXQ-AB-150/31.5-L-A NXQ-AB-150/10-L-A NXQ-AB-150/20-L-A
NXQ-AB-160/31.5-L-A NXQ-AB-160/10-L-A NXQ-AB-160/20-L-A
NXQ-AB-180/31.5-L-A NXQ-AB-180/10-L-A NXQ-AB-180/20-L-A
NXQ-AB-200/31.5-L-A NXQ-AB-200/10-L-A NXQ-AB-200/20-L-A
NXQ-AB-0.4/31.5-L-A NXQ-AB-0.4/10-L-A NXQ-AB-0.4/20-L-A
NXQ-AB-0.63/31.5-L-A NXQ-AB-0.63/10-L-A NXQ-AB-0.63/20-L-A
NXQ-AB-1/31.5-L-A NXQ-AB-1/10-L-A NXQ-AB-1/20-L-A
NXQ-AB-1.6/31.5-L-A NXQ-AB-1.6/10-L-A NXQ-AB-1.6/20-L-A
NXQ-AB-2.5/31.5-L-A NXQ-AB-2.5/10-L-A NXQ-AB-2.5/20-L-A
NXQ-AB-4.0/31.5-L-A NXQ-AB-4.0/10-L-A NXQ-AB-4.0/20-L-A
NXQ-AB-6.3/31.5-L-A NXQ-AB-6.3/10-L-A NXQ-AB-6.3/20-L-A
NXQ-AB-10/31.5-L-A NXQ-AB-10/10-L-A NXQ-AB-10/20-L-A
NXQ-AB-16/31.5-L-A NXQ-AB-16/10-L-A NXQ-AB-16/20-L-A
NXQ-AB-20/31.5-L-A NXQ-AB-20/10-L-A NXQ-AB-20/20-L-A
NXQ-AB-25/31.5-L-A NXQ-AB-25/10-L-A NXQ-AB-25/20-L-A
NXQ-AB-32/31.5-L-A NXQ-AB-32/10-L-A NXQ-AB-32/20-L-A
NXQ-AB-40/31.5-L-A NXQ-AB-40/10-L-A NXQ-AB-40/20-L-A
NXQ-AB-50/31.5-L-A NXQ-AB-50/10-L-A NXQ-AB-50/20-L-A
NXQ-AB-63/31.5-L-A NXQ-AB-63/10-L-A NXQ-AB-63/20-L-A
NXQ-AB-80/31.5-L-A NXQ-AB-80/10-L-A NXQ-AB-80/20-L-A
NXQ-AB-100/31.5-L-A NXQ-AB-100/10-L-A NXQ-AB-100/20-L-A
NXQ-AB-125/31.5-L-A NXQ-AB-125/10-L-A NXQ-AB-125/20-L-A
NXQ-AB-150/31.5-L-A NXQ-AB-150/10-L-A NXQ-AB-150/20-L-A
NXQ-AB-160/31.5-L-A NXQ-AB-160/10-L-A NXQ-AB-160/20-L-A
NXQ-AB-180/31.5-L-A NXQ-AB-180/10-L-A NXQ-AB-180/20-L-A
NXQ-AB-200/31.5-L-A NXQ-AB-200/10-L-A NXQ-AB-200/20-L-A
NXQ-A-0.4/31.5-L-A NXQ-A-0.4/10-L-A NXQ-A-0.4/20-L-A
NXQ-A-0.63/31.5-L-A NXQ-A-0.63/10-L-A NXQ-A-0.63/20-L-A
NXQ-A-1/31.5-L-A NXQ-A-1/10-L-A NXQ-A-1/20-L-A
NXQ-A-1.6/31.5-L-A NXQ-A-1.6/10-L-A NXQ-A-1.6/20-L-A
NXQ-A-2.5/31.5-L-A NXQ-A-2.5/10-L-A NXQ-A-2.5/20-L-A
NXQ-A-4.0/31.5-L-A NXQ-A-4.0/10-L-A NXQ-A-4.0/20-L-A
NXQ-A-6.3/31.5-L-A NXQ-A-6.3/10-L-A NXQ-A-6.3/20-L-A
NXQ-A-10/31.5-L-A NXQ-A-10/10-L-A NXQ-A-10/20-L-A
NXQ-A-16/31.5-L-A NXQ-A-16/10-L-A NXQ-A-16/20-L-A
NXQ-A-20/31.5-L-A NXQ-A-20/10-L-A NXQ-A-20/20-L-A
NXQ-A-25/31.5-L-A NXQ-A-25/10-L-A NXQ-A-25/20-L-A
NXQ-A-32/31.5-L-A NXQ-A-32/10-L-A NXQ-A-32/20-L-A
NXQ-A-40/31.5-L-A NXQ-A-40/10-L-A NXQ-A-40/20-L-A
NXQ-A-50/31.5-L-A NXQ-A-50/10-L-A NXQ-A-50/20-L-A
NXQ-A-63/31.5-L-A NXQ-A-63/10-L-A NXQ-A-63/20-L-A
NXQ-A-80/31.5-L-A NXQ-A-80/10-L-A NXQ-A-80/20-L-A
NXQ-A-100/31.5-L-A NXQ-A-100/10-L-A NXQ-A-100/20-L-A
NXQ-A-125/31.5-L-A NXQ-A-125/10-L-A NXQ-A-125/20-L-A
NXQ-A-150/31.5-L-A NXQ-A-150/10-L-A NXQ-A-150/20-L-A
NXQ-A-160/31.5-L-A NXQ-A-160/10-L-A NXQ-A-160/20-L-A
NXQ-A-180/31.5-L-A NXQ-A-180/10-L-A NXQ-A-180/20-L-A
NXQ-A-200/31.5-L-A NXQ-A-200/10-L-A NXQ-A-200/20-L-A
NXQ-A-0.4/31.5-L-A NXQ-A-0.4/10-L-A NXQ-A-0.4/20-L-A
NXQ-A-0.63/31.5-L-A NXQ-A-0.63/10-L-A NXQ-A-0.63/20-L-A
NXQ-A-1/31.5-L-A NXQ-A-1/10-L-A NXQ-A-1/20-L-A
NXQ-A-1.6/31.5-L-A NXQ-A-1.6/10-L-A NXQ-A-1.6/20-L-A
NXQ-A-2.5/31.5-L-A NXQ-A-2.5/10-L-A NXQ-A-2.5/20-L-A
NXQ-A-4.0/31.5-L-A NXQ-A-4.0/10-L-A NXQ-A-4.0/20-L-A
NXQ-A-6.3/31.5-L-A NXQ-A-6.3/10-L-A NXQ-A-6.3/20-L-A
NXQ-A-10/31.5-L-A NXQ-A-10/10-L-A NXQ-A-10/20-L-A
NXQ-A-16/31.5-L-A NXQ-A-16/10-L-A NXQ-A-16/20-L-A
NXQ-A-20/31.5-L-A NXQ-A-20/10-L-A NXQ-A-20/20-L-A
NXQ-A-25/31.5-L-A NXQ-A-25/10-L-A NXQ-A-25/20-L-A
NXQ-A-32/31.5-L-A NXQ-A-32/10-L-A NXQ-A-32/20-L-A
NXQ-A-40/31.5-L-A NXQ-A-40/10-L-A NXQ-A-40/20-L-A
NXQ-A-50/31.5-L-A NXQ-A-50/10-L-A NXQ-A-50/20-L-A
NXQ-A-63/31.5-L-A NXQ-A-63/10-L-A NXQ-A-63/20-L-A
NXQ-A-80/31.5-L-A NXQ-A-80/10-L-A NXQ-A-80/20-L-A
NXQ-A-100/31.5-L-A NXQ-A-100/10-L-A NXQ-A-100/20-L-A
NXQ-A-125/31.5-L-A NXQ-A-125/10-L-A NXQ-A-125/20-L-A
NXQ-A-150/31.5-L-A NXQ-A-150/10-L-A NXQ-A-150/20-L-A
NXQ-A-160/31.5-L-A NXQ-A-160/10-L-A NXQ-A-160/20-L-A
NXQ-A-180/31.5-L-A NXQ-A-180/10-L-A NXQ-A-180/20-L-A
NXQ-A-200/31.5-L-A NXQ-A-200/10-L-A NXQ-A-200/20-L-A
NXQ-AB-0.4/31.5-F-A NXQ-AB-0.4/10-F-A NXQ-AB-0.4/20-F-A
NXQ-AB-0.63/31.5-F-A NXQ-AB-0.63/10-F-A NXQ-AB-0.63/20-F-A
NXQ-AB-1/31.5-F-A NXQ-AB-1/10-F-A NXQ-AB-1/20-F-A
NXQ-AB-1.6/31.5-F-A NXQ-AB-1.6/10-F-A NXQ-AB-1.6/20-F-A
NXQ-AB-2.5/31.5-F-A NXQ-AB-2.5/10-F-A NXQ-AB-2.5/20-F-A
NXQ-AB-4.0/31.5-F-A NXQ-AB-4.0/10-F-A NXQ-AB-4.0/20-F-A
NXQ-AB-6.3/31.5-F-A NXQ-AB-6.3/10-F-A NXQ-AB-6.3/20-F-A
NXQ-AB-10/31.5-F-A NXQ-AB-10/10-F-A NXQ-AB-10/20-F-A
NXQ-AB-16/31.5-F-A NXQ-AB-16/10-F-A NXQ-AB-16/20-F-A
NXQ-AB-20/31.5-F-A NXQ-AB-20/10-F-A NXQ-AB-20/20-F-A
NXQ-AB-25/31.5-F-A NXQ-AB-25/10-F-A NXQ-AB-25/20-F-A
NXQ-AB-32/31.5-F-A NXQ-AB-32/10-F-A NXQ-AB-32/20-F-A
NXQ-AB-40/31.5-F-A NXQ-AB-40/10-F-A NXQ-AB-40/20-F-A
NXQ-AB-50/31.5-F-A NXQ-AB-50/10-F-A NXQ-AB-50/20-F-A
NXQ-AB-63/31.5-F-A NXQ-AB-63/10-F-A NXQ-AB-63/20-F-A
NXQ-AB-80/31.5-F-A NXQ-AB-80/10-F-A NXQ-AB-80/20-F-A
NXQ-AB-100/31.5-F-A NXQ-AB-100/10-F-A NXQ-AB-100/20-F-A
NXQ-AB-125/31.5-F-A NXQ-AB-125/10-F-A NXQ-AB-125/20-F-A
NXQ-AB-150/31.5-F-A NXQ-AB-150/10-F-A NXQ-AB-150/20-F-A
NXQ-AB-160/31.5-F-A NXQ-AB-160/10-F-A NXQ-AB-160/20-F-A
NXQ-AB-180/31.5-F-A NXQ-AB-180/10-F-A NXQ-AB-180/20-F-A
NXQ-AB-200/31.5-F-A NXQ-AB-200/10-F-A NXQ-AB-200/20-F-A
NXQ-AB-0.4/31.5-F-A NXQ-AB-0.4/10-F-A NXQ-AB-0.4/20-F-A
NXQ-AB-0.63/31.5-F-A NXQ-AB-0.63/10-F-A NXQ-AB-0.63/20-F-A
NXQ-AB-1/31.5-F-A NXQ-AB-1/10-F-A NXQ-AB-1/20-F-A
NXQ-AB-1.6/31.5-F-A NXQ-AB-1.6/10-F-A NXQ-AB-1.6/20-F-A
NXQ-AB-2.5/31.5-F-A NXQ-AB-2.5/10-F-A NXQ-AB-2.5/20-F-A
NXQ-AB-4.0/31.5-F-A NXQ-AB-4.0/10-F-A NXQ-AB-4.0/20-F-A
NXQ-AB-6.3/31.5-F-A NXQ-AB-6.3/10-F-A NXQ-AB-6.3/20-F-A
NXQ-AB-10/31.5-F-A NXQ-AB-10/10-F-A NXQ-AB-10/20-F-A
NXQ-AB-16/31.5-F-A NXQ-AB-16/10-F-A NXQ-AB-16/20-F-A
NXQ-AB-20/31.5-F-A NXQ-AB-20/10-F-A NXQ-AB-20/20-F-A
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NXQ-AB-150/31.5-F-EH NXQ-AB-150/10-F-EH NXQ-AB-150/20-F-EH
NXQ-AB-160/31.5-F-EH NXQ-AB-160/10-F-EH NXQ-AB-160/20-F-EH
NXQ-AB-180/31.5-F-EH NXQ-AB-180/10-F-EH NXQ-AB-180/20-F-EH
NXQ-AB-200/31.5-F-EH NXQ-AB-200/10-F-EH NXQ-AB-200/20-F-EH
NXQ-A-0.4/31.5-F-EH NXQ-A-0.4/10-F-EH NXQ-A-0.4/20-F-EH
NXQ-A-0.63/31.5-F-EH NXQ-A-0.63/10-F-EH NXQ-A-0.63/20-F-EH
NXQ-A-1/31.5-F-EH NXQ-A-1/10-F-EH NXQ-A-1/20-F-EH
NXQ-A-1.6/31.5-F-EH NXQ-A-1.6/10-F-EH NXQ-A-1.6/20-F-EH
NXQ-A-2.5/31.5-F-EH NXQ-A-2.5/10-F-EH NXQ-A-2.5/20-F-EH
NXQ-A-4.0/31.5-F-EH NXQ-A-4.0/10-F-EH NXQ-A-4.0/20-F-EH
NXQ-A-6.3/31.5-F-EH NXQ-A-6.3/10-F-EH NXQ-A-6.3/20-F-EH
NXQ-A-10/31.5-F-EH NXQ-A-10/10-F-EH NXQ-A-10/20-F-EH
NXQ-A-16/31.5-F-EH NXQ-A-16/10-F-EH NXQ-A-16/20-F-EH
NXQ-A-20/31.5-F-EH NXQ-A-20/10-F-EH NXQ-A-20/20-F-EH
NXQ-A-25/31.5-F-EH NXQ-A-25/10-F-EH NXQ-A-25/20-F-EH
NXQ-A-32/31.5-F-EH NXQ-A-32/10-F-EH NXQ-A-32/20-F-EH
NXQ-A-40/31.5-F-EH NXQ-A-40/10-F-EH NXQ-A-40/20-F-EH
NXQ-A-50/31.5-F-EH NXQ-A-50/10-F-EH NXQ-A-50/20-F-EH
NXQ-A-63/31.5-F-EH NXQ-A-63/10-F-EH NXQ-A-63/20-F-EH
NXQ-A-80/31.5-F-EH NXQ-A-80/10-F-EH NXQ-A-80/20-F-EH
NXQ-A-100/31.5-F-EH NXQ-A-100/10-F-EH NXQ-A-100/20-F-EH
NXQ-A-125/31.5-F-EH NXQ-A-125/10-F-EH NXQ-A-125/20-F-EH
NXQ-A-150/31.5-F-EH NXQ-A-150/10-F-EH NXQ-A-150/20-F-EH
NXQ-A-160/31.5-F-EH NXQ-A-160/10-F-EH NXQ-A-160/20-F-EH
NXQ-A-180/31.5-F-EH NXQ-A-180/10-F-EH NXQ-A-180/20-F-EH
NXQ-A-200/31.5-F-EH NXQ-A-200/10-F-EH NXQ-A-200/20-F-EH
NXQ-A-0.4/31.5-F-EH NXQ-A-0.4/10-F-EH NXQ-A-0.4/20-F-EH
NXQ-A-0.63/31.5-F-EH NXQ-A-0.63/10-F-EH NXQ-A-0.63/20-F-EH
NXQ-A-1/31.5-F-EH NXQ-A-1/10-F-EH NXQ-A-1/20-F-EH
NXQ-A-1.6/31.5-F-EH NXQ-A-1.6/10-F-EH NXQ-A-1.6/20-F-EH
NXQ-A-2.5/31.5-F-EH NXQ-A-2.5/10-F-EH NXQ-A-2.5/20-F-EH
NXQ-A-4.0/31.5-F-EH NXQ-A-4.0/10-F-EH NXQ-A-4.0/20-F-EH
NXQ-A-6.3/31.5-F-EH NXQ-A-6.3/10-F-EH NXQ-A-6.3/20-F-EH
NXQ-A-10/31.5-F-EH NXQ-A-10/10-F-EH NXQ-A-10/20-F-EH
NXQ-A-16/31.5-F-EH NXQ-A-16/10-F-EH NXQ-A-16/20-F-EH
NXQ-A-20/31.5-F-EH NXQ-A-20/10-F-EH NXQ-A-20/20-F-EH
NXQ-A-25/31.5-F-EH NXQ-A-25/10-F-EH NXQ-A-25/20-F-EH
NXQ-A-32/31.5-F-EH NXQ-A-32/10-F-EH NXQ-A-32/20-F-EH
NXQ-A-40/31.5-F-EH NXQ-A-40/10-F-EH NXQ-A-40/20-F-EH
NXQ-A-50/31.5-F-EH NXQ-A-50/10-F-EH NXQ-A-50/20-F-EH
NXQ-A-63/31.5-F-EH NXQ-A-63/10-F-EH NXQ-A-63/20-F-EH
NXQ-A-80/31.5-F-EH NXQ-A-80/10-F-EH NXQ-A-80/20-F-EH
NXQ-A-100/31.5-F-EH NXQ-A-100/10-F-EH NXQ-A-100/20-F-EH
NXQ-A-125/31.5-F-EH NXQ-A-125/10-F-EH NXQ-A-125/20-F-EH
NXQ-A-150/31.5-F-EH NXQ-A-150/10-F-EH NXQ-A-150/20-F-EH
NXQ-A-160/31.5-F-EH NXQ-A-160/10-F-EH NXQ-A-160/20-F-EH
NXQ-A-180/31.5-F-EH NXQ-A-180/10-F-EH NXQ-A-180/20-F-EH
NXQ-A-200/31.5-F-EH NXQ-A-200/10-F-EH NXQ-A-200/20-F-EH
5. On-Site Fault Maintenance Cases
The following are 4 real on-site fault maintenance cases of NXQ series bladder accumulators, which can provide reference for users to solve similar technical problems:
Case 1: System Pressure Drops Rapidly During Pressure Holding
Fault Phenomenon: A user's hydraulic press (equipped with NXQ-AB-16/31.5-L-A accumulator) had a problem that the system pressure dropped rapidly from 31.5MPa to 20MPa within 10 minutes during pressure holding, resulting in unqualified product forming.
Fault Diagnosis: First, check the hydraulic pump and pipeline for oil leakage, and no leakage was found; then measure the pre-charging pressure of the accumulator, which was 5MPa (the set pre-charging pressure was 9MPa), indicating that the bladder was leaking. Disassemble the accumulator and find that the bladder had a small crack at the connection with the valve group, which was caused by long-term use and aging of the bladder.
Maintenance Solution: Replace the bladder with a new nitrile rubber bladder of the same model, re-charge nitrogen to 9MPa, and test the system. After maintenance, the system pressure can be maintained at 31.5MPa for more than 1 hour without obvious pressure drop, and the fault is solved.
Preventive Measures: Shorten the bladder inspection cycle to 8 months, and replace the bladder regularly if the system operates continuously.
Case 2: Abnormal Noise in the Hydraulic System
Fault Phenomenon: A user's excavator (equipped with NXQ-A-10/20-F-BH accumulator) had abnormal noise (impact noise) in the hydraulic system when lifting the boom, and the boom jittered slightly.
Fault Diagnosis: Check the hydraulic valve and actuator, no abnormality was found; then check the accumulator, and find that the safety valve of the valve group was stuck, resulting in failure to absorb the hydraulic shock generated by the boom lifting. Disassemble the safety valve, and find that there was impurity blocking the valve core, which was caused by insufficient cleanliness of the hydraulic oil.
Maintenance Solution: Clean the safety valve core and valve seat, replace the hydraulic oil and filter element of the system, and flush the pipeline. After maintenance, the abnormal noise disappears, the boom lifts stably, and the fault is solved.
Preventive Measures: Replace the hydraulic oil and filter element every 6 months, and install a high-precision filter at the oil suction port of the hydraulic pump.
Case 3: Accumulator Shell Corrosion Leakage
Fault Phenomenon: A user's marine hydraulic system (equipped with NXQ-AB-50/20-F-EH accumulator) had oil leakage from the shell after 1 year of use, and the shell surface had obvious corrosion spots.
Fault Diagnosis: The accumulator was installed on the deck of the ship, which was eroded by sea water for a long time, and the anti-corrosion paint on the shell surface fell off, resulting in corrosion of the shell. Check the shell thickness, which was lower than the standard value, indicating that the shell was severely corroded.
Maintenance Solution: Replace the accumulator with a 316L stainless steel shell accumulator of the same model, apply marine anti-corrosion paint on the surface, and install a protective cover to prevent sea water erosion. After maintenance, no corrosion or oil leakage occurred within 2 years.
Preventive Measures: Apply anti-corrosion paint every 6 months, and regularly clean the shell surface to remove sea water and salt deposits.
Case 4: Pre-Charging Pressure Cannot Be Maintained
Fault Phenomenon: A user's CNC machine tool (equipped with NXQ-A-0.63/10-L-A accumulator) could not maintain the pre-charging pressure after supplementing nitrogen, and the pressure dropped to 0MPa within 2 hours.
Fault Diagnosis: Disassemble the accumulator and check the bladder, no leakage was found; then check the inflation valve, and find that the seal ring of the inflation valve was worn, resulting in nitrogen leakage. The wear of the seal ring was caused by frequent inflation and deflation.
Maintenance Solution: Replace the seal ring of the inflation valve with a new one, re-charge nitrogen to the set pressure (3MPa), and test. After maintenance, the pre-charging pressure can be maintained for more than 72 hours, and the fault is solved.
Preventive Measures: Reduce unnecessary inflation and deflation operations, and check the seal ring of the inflation valve every 3 months.
6. FAQ (Frequently Asked Questions)
Question | Answer |
What is the difference between NXQ-AB and NXQ-A series accumulators? Which one should I choose? | The core difference lies in the bladder structure: NXQ-AB adopts a double bladder structure, which has better shock absorption and pressure stabilization performance, and is suitable for high-pressure, large-shock hydraulic systems (such as construction machinery, metallurgical equipment); NXQ-A adopts a single bladder structure, which is lightweight, compact, and cost-effective, suitable for low-pressure, small-shock hydraulic systems (such as CNC machine tools, precision equipment). You can choose according to your system's pressure level, shock intensity, and installation space. |
Can I use air or oxygen instead of nitrogen to charge the accumulator? | No, it is strictly prohibited. Air contains oxygen and water vapor, which will react with hydraulic oil at high pressure to generate oxides and cause corrosion of the shell and bladder; oxygen is flammable and explosive, and mixing with hydraulic oil may cause explosion risks. Only dry nitrogen (purity ≥99.9%) can be used for charging, which is inert and will not react with hydraulic oil or components, ensuring safe operation. |
How to determine the appropriate volume and pressure of the accumulator for my hydraulic system? | The volume selection is based on the system's energy storage demand, leakage compensation amount, and shock absorption requirement: calculate the required volume according to the formula V = (ΔP × Vt) / (P1 - P2) (ΔP is the pressure fluctuation range, Vt is the system volume, P1 is the maximum working pressure, P2 is the minimum working pressure). The pressure selection should match the system's working pressure: the maximum working pressure of the accumulator should be 1.2-1.5 times the system's maximum working pressure, and the pre-charging pressure should be 0.6-0.9 times the system's minimum working pressure. If you are not sure, you can provide your system parameters, and we will provide professional selection suggestions. |
What is the service life of the NXQ series bladder accumulator? How to extend it? | The service life of the accumulator is usually 3-5 years (depending on the working conditions and maintenance level). The bladder's service life is 1-2 years under continuous operation. To extend the service life, you can do the following: 1. Regularly check and maintain the accumulator (pre-charging pressure, bladder, valve group); 2. Ensure the cleanliness of the hydraulic oil and replace it regularly; 3. Avoid overpressure, over-temperature, and excessive vibration of the system; 4. Select the appropriate model and material according to the working conditions; 5. Store and transport the accumulator correctly when not in use. |
What should I do if the accumulator fails suddenly during operation? Will it affect the normal operation of the system? | If the accumulator fails suddenly (such as oil leakage, air leakage, or valve stuck) during operation, you should stop the system immediately to avoid further damage to hydraulic components. For systems with a single accumulator, the system will lose pressure stabilization, shock absorption, and energy storage functions, resulting in unstable operation, equipment jitter, or even failure to work; for systems with multiple accumulators, the remaining accumulators can temporarily maintain basic system operation, but you should replace or repair the faulty accumulator in time. When a fault occurs, you can refer to the on-site maintenance cases provided in this guide for preliminary diagnosis, or contact our technical support team for professional guidance. |
7. Purchase Guide and Technical Support
Our NXQ series bladder accumulators are designed and manufactured in strict accordance with national and international standards (GB/T 14039-2002, ISO 10542-2001), with complete quality inspection procedures and authoritative quality certificates. All products have passed pressure test, air tightness test, and fatigue test before leaving the factory, ensuring high quality and reliability. We provide the full range of models listed in the original specification, including all NXQ-AB and NXQ-A series models with different pressures, volumes, connection types, and accessory configurations, and can also provide customized solutions according to your special needs (such as special material bladder, non-standard volume, and special installation method).
When purchasing, you only need to provide the model number (such as NXQ-AB-10/31.5-F-BH) or the key parameters of your hydraulic system (working pressure, volume demand, hydraulic oil type, installation environment), and our professional sales team will provide you with the most suitable product configuration and competitive price. We have a perfect after-sales service system, providing 24-hour technical support, on-site installation guidance, and maintenance services to solve your worries in use.
If you are looking for high-quality, reliable bladder accumulators to improve the performance of your hydraulic system, solve technical problems such as unstable pressure and frequent failures, please contact us. We are committed to providing you with professional products and services, helping you reduce operating costs and improve production efficiency. Choose us, and you will get a trusted partner in hydraulic system components.
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