Core Application Description
This guide covers hydraulic and pneumatic components specifically compatible with industrial machinery such as medium-sized hydraulic presses, reciprocating air compressors, precision injection molding machines, and conveyor systems (including models matching Y160L-8 series motors and 3051TG4A series transmitters). Targeted at mechanical maintenance engineers, procurement managers in manufacturing plants, and technical directors of industrial automation enterprises, it addresses the core needs of accurate component replacement, prolonged equipment operational life, reduced downtime, and improved production efficiency—providing reliable component selection and technical support for daily maintenance and equipment upgrading.
Product Classification & Technical Specifications
1. Hydraulic Directional Control Valves
Critical for precise fluid flow direction control in hydraulic systems, these valves prevent equipment misoperation and pressure buildup. Ideal for injection molding machines, hydraulic presses, and conveyor drive systems, they solve issues of unstable flow control and frequent valve sticking, ensuring smooth equipment actuation and reduced maintenance costs.
No. | Product Model | Material Description | Main Wear Causes | Damage Prevention Notes |
1 | 4WE10-D/OF-EW240-20-HT | Valve body: High-strength ductile iron (GGG40); Spool: Alloy steel (40Cr) with nitriding treatment; Sealing ring: Fluororubber (FKM) | 1. Contaminated hydraulic oil causing spool abrasion; 2. Long-term high-pressure operation leading to valve body deformation; 3. Improper voltage supply damaging solenoid coil | 1. Install a high-precision oil filter (filtration accuracy ≤10μm) in the oil circuit; 2. Regularly check and maintain stable system pressure within 20MPa; 3. Ensure the power supply voltage fluctuation range does not exceed ±5% of EW240 |
2 | 4WE-6G/E-W240-20-HT | Valve body: Carbon steel (ST37-2); Spool: Stainless steel (304); Sealing ring: Nitrile rubber (NBR) with heat-resistant coating | 1. Frequent switching operations causing sealing ring fatigue; 2. High-temperature working environment accelerating coil aging; 3. Hydraulic oil oxidation leading to sludge accumulation in valve ports | 1. Control switching frequency within 10 times/min to reduce sealing wear; 2. Install a cooling system if working temperature exceeds 60℃; 3. Replace hydraulic oil every 2000 working hours and clean valve ports |
2. Hydraulic Pressure Control Valves
Essential for stabilizing system pressure, these valves avoid overpressure damage to hydraulic components. Suitable for pressure-regulating scenarios in hydraulic presses, plastic extruders, and heavy-duty conveyors, they address pressure fluctuation issues, protect expensive core components, and enhance system operational safety and stability.
No. | Product Model | Material Description | Main Wear Causes | Damage Prevention Notes |
1 | AGMZO-TER-10/210/I-HT | Valve body: Forged alloy steel (42CrMo); Pressure regulating spool: Tungsten carbide coating; Spring: High-carbon alloy spring steel | 1. High-pressure impact causing spool surface coating peeling; 2. Spring fatigue due to frequent pressure adjustment; 3. Contaminants in oil blocking pressure relief channels | 1. Avoid sudden pressure spikes by installing a pressure buffer; 2. Limit pressure adjustment frequency and maintain stable working pressure; 3. Use hydraulic oil with viscosity grade 32-46 and ensure oil cleanliness NAS 8 class |
2 | MRV-03-B-3-B-HT | Valve body: Gray cast iron (HT250); Adjusting screw: Alloy steel (40CrNiMoA); Sealing element: Silicon rubber | 1. Loosening of adjusting screw due to vibration; 2. Sealing failure caused by oil impurities; 3. Corrosion of valve body inner cavity in humid environments | 1. Lock the adjusting screw with a locknut after setting pressure; 2. Install a pre-filter in the oil inlet pipeline; 3. Apply anti-corrosion coating to the valve body surface in humid workshops |
3 | MRV-03-P-3-B-HT | Valve body: Gray cast iron (HT250); Adjusting screw: Alloy steel (40CrNiMoA); Sealing element: Silicon rubber | 1. Over-tightening of adjusting screw leading to thread damage; 2. Fatigue of pressure-regulating spring under long-term high-load operation; 3. Oil leakage due to sealing ring aging in high-temperature environments | 1. Tighten the adjusting screw with a torque wrench according to the specified torque; 2. Regularly inspect the spring elasticity every 1500 working hours; 3. Ensure the working environment temperature does not exceed 80℃ |
4 | MRV-02-P-3-B-HT | Valve body: Gray cast iron (HT200); Adjusting screw: Alloy steel (40Cr); Sealing element: Silicon rubber | 1. Small flow rate causing cavitation in the valve port; 2. Vibration leading to misalignment of the valve core; 3. Contaminated oil causing jamming of the valve core | 1. Ensure the minimum flow rate meets the product specification requirements; 2. Install shock-absorbing pads at the valve installation position; 3. Regularly clean the oil filter and replace hydraulic oil |
5 | WCV-02-P-05-HT | Valve body: Stainless steel (304); Valve core: Stainless steel (316L); Sealing ring: PTFE | 1. Chemical corrosion of valve body in corrosive oil environments; 2. Wear of valve core due to solid particles in oil; 3. Sealing ring damage caused by excessive temperature | 1. Use compatible hydraulic oil with no corrosive components; 2. Install a high-precision oil filter (filtration accuracy ≤5μm); 3. Control the working temperature within -20℃ to 100℃ |
6 | MCV-03-P-05-HT | Valve body: Alloy steel (40Cr); Valve core: Tungsten carbide; Sealing element: Fluororubber | 1. High-pressure wear of the valve core; 2. Fatigue failure of the return spring; 3. Oil leakage due to sealing ring damage caused by oil impurities | 1. Operate within the specified maximum pressure (≤5MPa); 2. Replace the return spring every 2000 working hours; 3. Regularly check the oil cleanliness and replace the oil filter element |
3. Hydraulic Flow Control Valves
Designed to precisely adjust fluid flow rate in hydraulic systems, these valves ensure stable equipment movement speed. Applied in automatic production lines, packaging machinery, and precision machining equipment, they solve flow instability issues, improve processing accuracy, and reduce product defect rates.
No. | Product Model | Material Description | Main Wear Causes | Damage Prevention Notes |
1 | QV-06/16-HT | Valve body: Aluminum alloy (6061); Flow control spool: Brass with chrome plating; Sealing ring: Nitrile rubber | 1. Abrasion of the spool surface due to long-term flow adjustment; 2. Sealing ring damage caused by high-speed fluid scouring; 3. Blockage of flow channels by oil impurities | 1. Avoid frequent and large-range flow adjustments; 2. Ensure the fluid flow rate does not exceed the maximum specified value; 3. Regularly clean the flow channels and replace hydraulic oil |
2 | GLC3-4/1.0-HT | Valve body: Gray cast iron (HT200); Throttle valve core: Alloy steel; Sealing element: Fluororubber | 1. Cavitation at the throttle port due to excessive pressure difference; 2. Wear of the valve core due to solid particles in oil; 3. Sealing failure caused by temperature rise | 1. Control the pressure difference across the valve within the specified range; 2. Install a fine filter in the oil circuit; 3. Ensure good heat dissipation of the hydraulic system |
4. Hydraulic Accumulators
Key components for energy storage, pressure stabilization, and shock absorption in hydraulic systems. Suitable for intermittent working equipment such as hydraulic cranes, injection molding machines, and stamping machines, they solve problems of system pressure fluctuation and energy waste, improving energy utilization and reducing equipment impact damage.
No. | Product Model | Material Description | Main Wear Causes | Damage Prevention Notes |
1 | NXQ1-L1.6/20-H-HT | Shell: Carbon steel (Q235B); Bladder: Nitrile rubber; Piston: Aluminum alloy | 1. Bladder damage due to excessive pre-charging pressure; 2. Corrosion of the shell inner wall by moisture in hydraulic oil; 3. Bladder aging caused by high-temperature oil | 1. Strictly control the pre-charging pressure according to the product manual; 2. Regularly check the water content of hydraulic oil and dehydrate if necessary; 3. Maintain the oil temperature below 70℃ |
2 | NXQ1-F10/20-H-HT | Shell: Carbon steel (Q235B); Bladder: Nitrile rubber; Piston: Aluminum alloy | 1. Bladder rupture due to impact pressure; 2. Oil leakage caused by sealing ring damage; 3. Shell deformation due to external collision | 1. Install a pressure relief valve to prevent impact pressure; 2. Replace the sealing ring every 1800 working hours; 3. Install a protective cover around the accumulator to avoid collision |
5. Hydraulic Cylinders & Accessories
Core executive components for converting hydraulic energy into mechanical energy, widely used in lifting machinery, transportation equipment, and production line actuators. They address issues of insufficient output force and unstable movement, ensuring reliable equipment operation and improving production efficiency.
No. | Product Model | Material Description | Main Wear Causes | Damage Prevention Notes |
1 | SFL-F190X10LS-HT | Cylinder barrel: Seamless steel pipe (20#); Piston rod: Chrome-plated alloy steel (40Cr); Piston seal: Fluororubber | 1. Scratches on the piston rod surface caused by external impurities; 2. Sealing ring wear due to long-term reciprocating movement; 3. Cylinder barrel inner wall wear due to oil contamination | 1. Install a dust cover at the cylinder rod end; 2. Control the reciprocating speed within the specified range; 3. Use hydraulic oil with good lubricity and regularly replace the oil filter |
2 | SRFL-A110X5GS-HT | Cylinder barrel: Seamless steel pipe (20#); Piston rod: Chrome-plated alloy steel (40Cr); Piston seal: Fluororubber | 1. Piston rod bending due to eccentric load; 2. Sealing failure caused by high-temperature oil; 3. Corrosion of the cylinder barrel in humid environments | 1. Ensure the load is applied along the cylinder axis; 2. Maintain the oil temperature below 80℃; 3. Apply anti-corrosion coating to the cylinder surface |
3 | YWZ-250-HT | Cylinder body: Gray cast iron (HT250); Piston: Cast iron; Spring: High-carbon steel | 1. Spring fatigue due to frequent braking; 2. Piston wear caused by oil impurities; 3. Sealing ring aging in high-temperature environments | 1. Avoid frequent emergency braking; 2. Regularly clean the oil circuit and replace hydraulic oil; 3. Check the sealing ring regularly and replace if aging is found |
6. Hydraulic Pumps & Motors
Power sources of hydraulic systems, providing stable hydraulic energy for equipment. Suitable for various industrial machinery such as excavators, injection molding machines, and rolling mills, they solve problems of insufficient power output and unstable operation, ensuring continuous and efficient equipment operation.
No. | Product Model | Material Description | Main Wear Causes | Damage Prevention Notes |
1 | Y160L-8-HT | Stator and rotor: Alloy steel (42CrMo); Shaft: Alloy steel (40CrNiMoA); Housing: Gray cast iron (HT250) | 1. Wear of stator and rotor due to insufficient lubrication; 2. Shaft wear caused by misalignment during installation; 3. Overheating of the motor due to overload operation | 1. Ensure sufficient lubrication before startup and during operation; 2. Adjust the coaxiality during installation to meet the requirements (≤0.05mm); 3. Monitor the load status and avoid overload operation |
2 | PFG-327/D-HT | Pump body: Forged alloy steel; Gear: Alloy steel (20CrMnTi) with carburizing treatment; Shaft: Alloy steel (40Cr) | 1. Gear wear due to contaminated oil; 2. Bearing damage caused by high-speed operation; 3. Oil leakage due to sealing ring aging | 1. Use clean hydraulic oil and replace the oil filter regularly; 2. Check the bearing temperature regularly and replace the bearing if overheating occurs; 3. Replace the sealing ring every 2500 working hours |
7. Sensors & Transmitters
Critical for real-time monitoring of hydraulic system parameters (pressure, temperature, etc.), providing accurate data for system control. Applied in intelligent industrial equipment, precision machining, and automated production lines, they solve problems of inaccurate parameter monitoring and delayed fault diagnosis, improving system intelligence and reliability.
No. | Product Model | Material Description | Main Wear Causes | Damage Prevention Notes |
1 | 3051TG4A-HT | Sensor housing: Stainless steel (316L); Sensing element: Silicon chip; Connector: Engineering plastic | 1. Damage to the sensing element due to excessive pressure impact; 2. Connector corrosion in humid and corrosive environments; 3. Signal interference caused by electromagnetic radiation | 1. Install a pressure buffer to avoid impact pressure; 2. Use a protective cover for the connector in humid and corrosive environments; 3. Keep the sensor away from strong electromagnetic sources |
2 | WZP2-231-HT | Temperature sensing element: Platinum resistance (Pt100); Sheath: Stainless steel (316); Lead wire: High-temperature resistant cable | 1. Sheath damage due to mechanical collision; 2. Drift of the sensing element due to high-temperature aging; 3. Lead wire damage caused by excessive bending | 1. Install the sensor in a position free from collision; 2. Calibrate the sensor regularly (every 12 months); 3. Avoid excessive bending of the lead wire and fix it properly |
8. Pneumatic Components
Used for gas transmission and control in pneumatic systems, suitable for light-load, high-speed actuation scenarios such as automatic assembly lines, packaging machinery, and textile equipment. They solve problems of slow actuation and high energy consumption, improving equipment response speed and energy efficiency.
No. | Product Model | Material Description | Main Wear Causes | Damage Prevention Notes |
1 | BK3-G3/4-8123-L-HT | Valve body: Brass; Sealing ring: Nitrile rubber; Connector: Brass | 1. Sealing ring wear due to dry friction (lack of lubrication); 2. Corrosion of the valve body in humid environments; 3. Blockage of air channels by air impurities | 1. Add a lubricator to the pneumatic system for proper lubrication; 2. Apply anti-corrosion coating to the valve body surface; 3. Install an air filter at the inlet |
2 | KHNVN-G11/2-2233-HT | Valve body: Aluminum alloy; Sealing ring: Fluororubber; Adjusting knob: Engineering plastic | 1. Wear of the adjusting knob due to frequent adjustment; 2. Sealing failure caused by high-temperature air; 3. Valve body deformation due to excessive pressure | 1. Avoid frequent adjustment of the knob; 2. Ensure the air temperature does not exceed 80℃; 3. Operate within the specified maximum pressure range |
3 | QUQ2-20X2.5-HT | Filter element: Stainless steel mesh; Housing: Aluminum alloy; Sealing ring: Nitrile rubber | 1. Clogging of the filter element due to excessive impurities in the air; 2. Sealing ring damage caused by pressure fluctuation; 3. Corrosion of the housing in acidic air environments | 1. Clean or replace the filter element regularly; 2. Install a pressure stabilizer to avoid pressure fluctuation; 3. Use in non-acidic air environments or apply anti-corrosion treatment |
9. Other Hydraulic & Pneumatic Accessories
Including connectors, filters, and pressure gauges, these accessories are essential for ensuring the normal operation of hydraulic and pneumatic systems. They solve problems of system leakage, contamination, and inaccurate pressure monitoring, improving system integrity and operational stability.
No. | Product Model | Material Description | Main Wear Causes | Damage Prevention Notes |
1 | CRG-03-05-20-HT | Connector body: Brass; Sealing ring: Nitrile rubber; Lock nut: Steel | 1. Thread damage due to over-tightening during installation; 2. Sealing ring wear due to vibration; 3. Corrosion of the connector body in humid environments | 1. Tighten with a torque wrench according to the specified torque; 2. Install a shock absorber if the working environment has strong vibration; 3. Apply anti-rust oil to the thread |
2 | GCT-04-HT | Filter body: Aluminum alloy; Filter element: Stainless steel; Sealing ring: Fluororubber | 1. Clogging of the filter element due to excessive oil impurities; 2. Sealing ring damage caused by high-temperature oil; 3. Filter body deformation due to external impact | 1. Clean or replace the filter element regularly; 2. Ensure the oil temperature does not exceed 80℃; 3. Install a protective cover |
3 | 3051TG4A-HT | Housing: Stainless steel (316L); Sensing element: Silicon chip; Connector: Engineering plastic | 1. Damage to the sensing element due to pressure impact; 2. Connector corrosion in humid environments; 3. Signal interference from electromagnetic fields | 1. Install a pressure relief valve to prevent impact; 2. Protect the connector from moisture; 3. Keep away from electromagnetic sources |
4 | 30MG30.11.14 | Body: Alloy steel; Internal components: Stainless steel; Sealing element: Fluororubber | 1. Wear of internal components due to contaminated oil; 2. Sealing failure caused by temperature rise; 3. Body corrosion in corrosive environments | 1. Use clean oil and replace the filter regularly; 2. Maintain good system heat dissipation; 3. Apply anti-corrosion coating if used in corrosive environments |
5 | MG00.11.19.01 | Body: Alloy steel; Internal components: Stainless steel; Sealing element: Fluororubber | 1. Internal component wear due to long-term high-load operation; 2. Sealing ring aging in high-temperature environments; 3. Oil leakage caused by loose fasteners | 1. Avoid long-term high-load operation; 2. Replace the sealing ring regularly; 3. Check and tighten fasteners regularly |
On-Site Fault Maintenance Cases
Case 1: Hydraulic Directional Control Valve Sticking Fault
A plastic processing plant reported that the injection molding machine's hydraulic system frequently experienced misoperation. After on-site inspection, it was found that the 4WE10-D/OF-EW240-20-HT directional control valve was stuck. The root cause was that the hydraulic oil had not been replaced for a long time, resulting in sludge accumulation in the valve port, which blocked the valve core movement. The solution was to replace the hydraulic oil, clean the valve port and valve core, and install a high-precision oil filter. After maintenance, the equipment operated normally, and the fault did not recur within 6 months.
Case 2: Hydraulic Accumulator Bladder Rupture Fault
A construction machinery company's hydraulic crane had a sudden drop in system pressure during operation. Inspection showed that the bladder of the NXQ1-F10/20-H-HT accumulator was ruptured. The cause was that the pre-charging pressure exceeded the specified value during maintenance. The solution was to replace the bladder, re-charge the pressure according to the product manual, and install a pressure gauge for real-time monitoring. After improvement, the accumulator operated stably, and the system pressure fluctuation range was controlled within the allowable range.
FAQ (Frequently Asked Questions)
Question | Answer |
What factors should be considered when selecting hydraulic valves? | Key factors include system working pressure (must not exceed the valve's maximum allowable pressure), flow rate (matching the system's flow demand), working medium (ensuring compatibility with the valve's sealing material), working temperature (within the valve's operating temperature range), and control method (consistent with the system's control requirements). Additionally, consider the valve's material and corrosion resistance based on the working environment. |
How to judge if the hydraulic accumulator is working normally? | First, check the pre-charging pressure with a pressure gauge; it should be within the range specified in the manual. Second, monitor the system pressure fluctuation; if the fluctuation range exceeds the allowable value, the accumulator may be faulty. Third, check for oil leakage at the accumulator connection; leakage indicates sealing failure. Finally, observe the equipment's actuation stability; unstable actuation may be caused by accumulator failure. |
What are the key points for daily maintenance of hydraulic and pneumatic components? | 1. Regularly check the cleanliness and quality of hydraulic oil/pneumatic air, and replace or filter them in a timely manner. 2. Inspect sealing components for aging, damage, or leakage, and replace them promptly. 3. Check the fastening status of connectors and fasteners to avoid loosening due to vibration. 4. Regularly calibrate sensors and transmitters to ensure accurate measurement. 5. Keep components clean and free from external impurities and collision damage. |
Procurement and Technical Reference Standards
Procurement Reference Standards
1. Model Matching: Strictly match the component model with the equipment's original configuration to ensure dimensional, pressure, and flow compatibility. 2. Quality Certification: Prioritize components that meet international standards (such as ISO 4406 for hydraulic oil cleanliness and ISO 6403 for pneumatic components). 3. Material Requirements: Select materials based on the working environment (e.g., stainless steel for corrosive environments, high-temperature resistant materials for high-temperature environments). 4. Supplier Qualification: Choose suppliers with professional production qualifications, technical support capabilities, and a good after-sales service system.
Technical Problem Reference Standards
1. Fault Diagnosis: Refer to the component's technical manual and on-site fault phenomena for systematic diagnosis, focusing on pressure, flow, and temperature parameters. 2. Maintenance Specifications: Follow the maintenance procedures specified in the product manual, such as torque requirements for fasteners and calibration standards for sensors. 3. Replacement Criteria: Replace components if they have obvious wear (e.g., piston rod scratches exceeding 0.2mm), sealing failure, or performance degradation (e.g., valve pressure regulation inaccuracy exceeding ±5%). 4. Safety Standards: Comply with industrial safety standards (such as GB/T 3766 for hydraulic systems and GB/T 7932 for pneumatic systems) during maintenance and replacement to ensure operational safety.
Procurement Guidance
The hydraulic and pneumatic components listed in this guide are carefully selected to meet the operational needs of various industrial equipment, with reliable quality and excellent performance. Whether you are engaged in equipment maintenance, upgrading, or new machine assembly, these components can provide effective solutions for your needs. We invite you to contact our professional sales team to learn more about product details, obtain personalized quotation information, and enjoy professional technical support services. Our team will wholeheartedly help you select the most suitable components to ensure the stable and efficient operation of your equipment.
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