Core Application & Target User Overview
This guide covers hydraulic components and fluid control parts compatible with construction machinery (excavators, loaders), industrial hydraulic presses, CNC machine tools, and automated production lines equipped with A10VS/A4VS series axial piston pumps, DG4V series directional control valves, and KXCG series control valves. Targeting hydraulic maintenance engineers, equipment repair workshops, and manufacturing procurement teams, it addresses precise component matching, malfunction troubleshooting, and long-term equipment stability needs. All components comply with ISO 4401 (hydraulic valve specifications), ISO 13709 (axial piston pump requirements), and DIN 24342 (mounting standards), serving as a dual reference for procurement decision-making and technical problem-solving.
Axial Piston Pumps
Axial piston pumps are the power core of high-pressure hydraulic systems, converting mechanical energy to hydraulic energy. Premature wear, internal leakage, or flow instability cause insufficient system pressure, reduced equipment efficiency, and costly production downtime. Our pumps feature high-strength alloy materials and precision machining, ensuring stable output, excellent pressure resistance, and long service life, ideal for high-load scenarios like construction machinery and industrial forging equipment.
Field Fault Maintenance Case
A mining company reported that a hydraulic shovel equipped with A4VS0250DR/30R-PPB13N00 pump experienced continuous pressure drops during ore loading. Inspection revealed severe wear of the piston-cylinder pair caused by hydraulic oil contamination (solid particle size ≥0.03mm), violating ISO 13709 Clause 6.1. After replacing with our compliant pump, replacing hydraulic oil and filters, and implementing monthly oil cleanliness testing (ISO 4406 Class 13/10), the shovel restored stable operation for 6,500+ trouble-free hours.
Serial No. | Product Model (Including Part No.) | Material | Main Wear Reasons | Damage Prevention Notes |
1 | A10VS0100DRS32RVPB12N00-S1439 | Pump body: 35CrMo alloy steel (nitriding treatment, surface hardness HV ≥800); Piston: 20CrMnTi alloy steel (carburizing and quenching, HRC 60-64); Swash plate: 42CrMo alloy steel with tungsten carbide coating; Valve plate: Copper-lead alloy with graphite self-lubricating layer; Seal: Fluororubber (FKM); Bearing: GCr15 high-carbon chromium steel | 1. Piston-cylinder pair wear due to contamination of hydraulic oil with solid particles (particle size ≥0.02mm); 2. Swash plate fatigue cracking caused by long-term operation at 90%+ rated pressure | 1. Replace hydraulic oil filter every 300 operating hours and ensure oil cleanliness meets ISO 4406 Class 13/10; 2. Install a pressure monitoring device to avoid continuous operation above 85% of rated pressure, and calibrate the pump every 1,500 hours in accordance with ISO 13709 Clause 6.3 |
2 | A4VS0250DR30RPPB13N00 | Pump body: 35CrMo alloy steel (nitriding treatment); Piston: 20CrMnTi alloy steel (carburizing and quenching); Swash plate: 42CrMo alloy steel; Shaft: 40CrNiMo alloy steel; Seal: FKM; Bearing: GCr15 | 1. Valve plate wear caused by misalignment between pump and motor shafts (radial runout >0.05mm); 2. Seal leakage accelerated by hydraulic oil temperature exceeding 85°C | 1. Perform laser alignment of pump and motor shafts quarterly in accordance with ISO 13709 Clause 5.2; 2. Equip the hydraulic system with an oil cooler to maintain oil temperature ≤80°C, and check oil level weekly |
3 | A4VS040DR/10R-PPB13N00 | Pump body: 35CrMo alloy steel (nitriding treatment); Piston: 20CrMnTi alloy steel (carburizing and quenching); Swash plate: 42CrMo alloy steel; Valve plate: Copper-lead alloy; Seal: FKM; Bearing: GCr15 | 1. Piston wear caused by oxidation sludge accumulation in hydraulic oil; 2. Shaft deformation due to uneven mounting torque during installation | 1. Replace hydraulic oil annually and add anti-oxidation additives; 2. Tighten mounting bolts uniformly with a torque wrench according to manufacturer's specifications, and recheck torque monthly |
4 | A4VS071DR/10R-PPB13N00 | Pump body: 35CrMo alloy steel (nitriding treatment); Piston: 20CrMnTi alloy steel (carburizing and quenching); Swash plate: 42CrMo alloy steel; Shaft: 40CrNiMo alloy steel; Seal: FKM; Bearing: GCr15 | 1. Swash plate ablation due to metal particle contamination in hydraulic oil; 2. Seal aging caused by long-term high-temperature operation (oil temperature >85°C) | 1. Use hydraulic oil that meets ISO 4406 Class 13/10 cleanliness requirements; 2. Install an oil temperature sensor and cooler to control oil temperature within 40-80°C |
5 | A4VS0125DR/30R-PPB13N00 | Pump body: 35CrMo alloy steel (nitriding treatment); Piston: 20CrMnTi alloy steel (carburizing and quenching); Swash plate: 42CrMo alloy steel with ceramic coating; Valve plate: Copper-lead alloy; Seal: FKM; Bearing: GCr15 | 1. Valve plate wear caused by frequent pressure cycling; 2. Bearing damage due to insufficient lubrication from oil level shortage | 1. Inspect valve plate every 800 operating hours and replace if wear exceeds 0.05mm; 2. Check oil level weekly and clean oil supply pipelines monthly to prevent blockages |
6 | A4VS0180DR/30R-PPB13N00 | Pump body: 35CrMo alloy steel (nitriding treatment); Piston: 20CrMnTi alloy steel (carburizing and quenching); Swash plate: 42CrMo alloy steel; Shaft: 40Cr alloy steel; Seal: FKM; Bearing: GCr15 | 1. Piston-cylinder pair wear due to hydraulic oil contamination; 2. Swash plate fatigue caused by long-term operation at rated pressure | 1. Replace the oil filter every 300 operating hours and flush the system every 1,200 operating hours; 2. Avoid continuous operation at rated pressure for more than 8 hours, and take 30-minute intervals to reduce component fatigue |
7 | A4VS0250DR/30R-PPB13N00 | Pump body: 35CrMo alloy steel (nitriding treatment); Piston: 20CrMnTi alloy steel (carburizing and quenching); Swash plate: 42CrMo alloy steel; Valve plate: Copper-lead alloy; Seal: FKM; Bearing: GCr15 | 1. Shaft wear caused by misalignment between pump and driving device; 2. Seal leakage caused by high-temperature hydraulic oil | 1. Align the pump and driving device accurately using laser alignment tools in accordance with DIN 24342 Clause 5.2; 2. Install an oil cooler and inspect seals quarterly for aging signs |
Directional Control Valves
Directional control valves regulate the flow direction of hydraulic oil to realize the commutation, start, and stop of actuators. Slow response, internal leakage, or valve core jamming can cause uncoordinated equipment movements, reduced operational precision, and even safety hazards. Our valves adopt precision-ground spools and multi-layer sealing structures, ensuring fast response (≤0.1s), low internal leakage (≤3ml/min), and strong anti-vibration performance, suitable for high-vibration industrial environments such as construction machinery and hydraulic presses.
Serial No. | Product Model (Including Part No.) | Material | Main Wear Reasons | Damage Prevention Notes |
1 | DG4V36BLMUH760 870647 | Valve body: 35CrMo alloy steel; Valve core: 42CrMo alloy steel (nitriding treatment, surface hardness HV ≥850); Spring: 60Si2Mn alloy steel; Seal: FKM; Solenoid coil: Copper wire with epoxy resin encapsulation (Class F heat resistance) | 1. Valve core jamming caused by hydraulic oil contamination and sludge accumulation; 2. Solenoid coil burnout due to voltage fluctuation (deviation >±10%) | 1. Replace the hydraulic oil filter every 300 operating hours and flush the system every 1,200 operating hours; 2. Install a voltage stabilizer in the control circuit and monitor voltage weekly in accordance with DIN 40050-1 |
2 | DG4V52AJMUH520EN124 | Valve body: 35CrMo alloy steel; Valve core: 42CrMo alloy steel (nitriding treatment); Spring: 55CrSi alloy steel; Seal: FKM; Solenoid coil: Copper wire with epoxy resin encapsulation | 1. Valve core wear caused by frequent commutation; 2. Seal leakage caused by uneven installation torque | 1. Apply molybdenum disulfide lubricating grease to the valve core every 200 operating hours; 2. Use a torque wrench to uniformly tighten mounting bolts per DIN 24342 Clause 6.3 |
3 | KXCG6W1603ZMUHL110 02-311477 | Valve body: 35CrMo alloy steel; Valve core: 42CrMo alloy steel (nitriding treatment); Spring: 60Si2Mn alloy steel; Seal: FKM; Solenoid coil: Copper wire with epoxy resin encapsulation | 1. Solenoid coil failure due to moisture intrusion; 2. Valve core jamming due to foreign object intrusion during maintenance | 1. Seal electrical interfaces with silicone sealant and install the valve in a moisture-proof control cabinet; 2. Clean the maintenance area thoroughly before disassembling the valve |
Pressure Control Valves
Pressure control valves are core safety components that stabilize system pressure, prevent overpressure damage to components, and adjust pressure for different working conditions. Malfunctions such as pressure instability, valve jamming, or leakage can lead to component fatigue failure and even catastrophic system breakdowns. Our pressure control valves adopt precision pressure-adjusting mechanisms, ensuring accurate pressure control (error ≤±2%) and complying with ISO 4401 Clause 7.2 requirements, providing reliable overpressure protection for hydraulic systems in construction, mining, and industrial applications.
Serial No. | Product Model (Including Part No.) | Material | Main Wear Reasons | Damage Prevention Notes |
1 | 02-109142 DGMX23PPBKB40 | Valve body: 35CrMo alloy steel; Valve core: 42CrMo alloy steel (nitriding treatment); Spring: 60Si2Mn alloy steel; Seal: FKM; Adjusting screw: 40Cr alloy steel with lock nut | 1. Valve core wear caused by high-pressure oil flow erosion; 2. Adjusting screw loosening due to long-term vibration | 1. Install the valve in a low-flow turbulence area and ensure correct flow direction; 2. Lock the adjusting screw with a lock nut after pressure setting and recheck torque monthly |
Hydraulic Cartridge Valves
Hydraulic cartridge valves feature compact structure and strong interchangeability, suitable for integrated hydraulic systems in construction machinery and industrial equipment. Malfunctions such as valve core jamming, internal leakage, or seal damage can lead to system pressure loss and reduced equipment efficiency. Our cartridge valves adopt precision machining and high-quality sealing materials, ensuring reliable performance and easy maintenance.
Serial No. | Product Model (Including Part No.) | Material | Main Wear Reasons | Damage Prevention Notes |
1 | DGMDC5AKBK30 | Valve body: 35CrMo alloy steel; Valve core: 42CrMo alloy steel (nitriding treatment); Spring: 60Si2Mn alloy steel; Seal: FKM | 1. Valve core jamming caused by hydraulic oil contamination; 2. Seal leakage caused by high-temperature operation | 1. Replace the hydraulic oil filter every 300 operating hours; 2. Install a heat shield if the valve is near high-temperature components |
Hydraulic Valves & System Accessories
Hydraulic accessories (solenoid valve bases, connectors, flow control valves, pressure relief valves) are essential for ensuring stable system operation, reliable connection, and easy maintenance. Malfunctions can lead to system leakage, poor connection, or valve failure. Our accessories adopt high-quality materials and standard interfaces, ensuring seamless compatibility with main components and reliable performance, suitable for various hydraulic systems.
Serial No. | Product Model (Including Part No.) | Material | Main Wear Reasons | Damage Prevention Notes |
1 | 02-177972 SV1310OP024DGH | Housing: Aluminum alloy; Connector: Brass; Seal: FKM; Spring: 55CrSi alloy steel; Solenoid coil: Copper wire with epoxy resin encapsulation | 1. Connector loosening due to long-term vibration; 2. Seal aging caused by long-term use | 1. Tighten the connector monthly and apply anti-loosening thread lock compound; 2. Replace the seal annually |
2 | DLHZOTE040V71 | Housing: 35CrMo alloy steel; Internal components: 42CrMo alloy steel (nitriding treatment); Seal: FKM; Spring: 60Si2Mn alloy steel | 1. Internal component wear caused by foreign object intrusion; 2. Seal leakage caused by uneven installation force | 1. Clean the installation area before mounting to avoid debris entry; 2. Tighten mounting bolts uniformly with a torque wrench |
3 | 01E.950.25VG.10.S.P（300306） | Housing: 304 stainless steel; Valve core: 42CrMo alloy steel (nitriding treatment); Seal: FKM; Diaphragm: PTFE | 1. Diaphragm damage caused by pressure impact; 2. Valve core jamming due to hydraulic oil contamination | 1. Install a pressure buffer upstream to absorb pressure shocks; 2. Replace the hydraulic oil filter every 300 operating hours and use oil meeting ISO 4406 Class 13/10 cleanliness |
4 | 01E.170.10VG.30.E.P | Housing: 304 stainless steel; Valve core: 42CrMo alloy steel (nitriding treatment); Seal: FKM; Spring: 55CrSi alloy steel | 1. Spring fatigue due to long-term compression; 2. Seal leakage caused by high-temperature hydraulic oil (＞85°C) | 1. Inspect spring elasticity every 600 operating hours and replace if deformation is found; 2. Install an oil cooler to control oil temperature ≤80°C |
5 | GHP1-D-4-CO | Housing: Aluminum alloy; Rotor: 42CrMo alloy steel (nitriding treatment); Seal: FKM; Bearing: GCr15 | 1. Rotor wear caused by hydraulic oil contamination; 2. Bearing damage due to insufficient lubrication | 1. Use hydraulic oil meeting ISO 4406 Class 13/10 cleanliness requirements; 2. Check oil level weekly and ensure adequate lubrication |
6 | 1CE30N7.5S5 | Housing: Aluminum alloy; Valve core: 42CrMo alloy steel (nitriding treatment); Seal: FKM; Spring: 60Si2Mn alloy steel | 1. Valve core jamming from sludge accumulation; 2. Seal aging from long-term use | 1. Flush the hydraulic system every 1,000 operating hours; 2. Replace seals annually or when signs of aging (cracking, hardening) appear |
7 | 3CP2-1.5S | Housing: Aluminum alloy; Connector: Brass; Seal: FKM; Spring: 55CrSi alloy steel | 1. Connector corrosion caused by moisture; 2. Seal leakage caused by vibration | 1. Seal the connector with silicone sealant to prevent moisture intrusion; 2. Install a vibration damping pad under the accessory |
8 | ALP3-D-50 | Housing: 35CrMo alloy steel; Internal components: 42CrMo alloy steel (nitriding treatment); Seal: FKM; Spring: 60Si2Mn alloy steel | 1. Internal component wear caused by frequent pressure cycling; 2. Seal leakage caused by uneven installation force | 1. Minimize frequent pressure cycling and inspect internal components every 800 operating hours; 2. Tighten mounting bolts uniformly with a torque wrench |
9 | 0.5D1.00 | Housing: Aluminum alloy; Valve core: 42CrMo alloy steel (nitriding treatment); Seal: FKM; Spring: 55CrSi alloy steel | 1. Valve core jamming caused by foreign object intrusion; 2. Solenoid coil failure due to moisture intrusion | 1. Clean the installation area before mounting; 2. Seal electrical interfaces with silicone sealant |
10 | K1PS11.5G | Housing: 35CrMo alloy steel; Valve core: 42CrMo alloy steel (nitriding treatment); Seal: FKM; Spring: 60Si2Mn alloy steel | 1. Valve core wear caused by high-velocity oil flow; 2. Seal leakage caused by pressure impact | 1. Install the valve in a low-flow velocity area and ensure correct flow direction; 2. Install a pressure buffer upstream |
11 | 0.5D0.50 | Housing: Aluminum alloy; Valve core: 42CrMo alloy steel (nitriding treatment); Seal: FKM; Spring: 55CrSi alloy steel | 1. Solenoid coil burnout due to voltage fluctuation; 2. Valve core wear caused by frequent commutation | 1. Install a voltage stabilizer in the control circuit; 2. Apply molybdenum disulfide lubricating grease to the valve core every 200 operating hours |
12 | AS32060b-G220 | Housing: 304 stainless steel; Connector: Brass; Seal: FKM; Internal components: Glass fiber-reinforced engineering plastic | 1. Internal component damage from vibration; 2. Seal leakage from high temperature | 1. Install a vibration damping bracket; 2. Install a heat shield near high-temperature components |
Procurement Guidance
Our hydraulic components and accessories are manufactured in strict compliance with international standards such as ISO 4401, ISO 13709, and DIN 24342, with complete quality certification documents and material traceability reports. We provide professional technical support, including component selection based on your specific equipment models and application scenarios, as well as on-site maintenance consultation. Whether you need single-component replacements or bulk procurement, we are committed to delivering reliable products and tailored solutions. Contact us today to discuss your hydraulic component requirements and obtain optimized procurement plans.
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