Core Application & Target User Overview
This guide covers hydraulic components compatible with construction machinery (excavators, loaders), industrial hydraulic presses, CNC machine tools, and automated production lines equipped with A10VS/A4VS series pumps, DG4V/DG5V series directional control valves, and DGMFN/DGMPC/DGMX series cartridge 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 pressure, reduced efficiency, and costly downtime. Our pumps feature high-strength alloys and precision machining, ensuring stable output, pressure resistance, and long service life for high-load scenarios like construction machinery and industrial forging.
Field Fault Maintenance Case
A construction site reported an excavator with A4VS0250DR30RPPB13N00 pump experiencing frequent pressure drops during heavy loading. Inspection found valve plate wear due to pump-motor shaft misalignment (radial runout >0.05mm), violating ISO 13709 Clause 5.2. After replacing with our compliant pump and laser alignment, the excavator achieved 5,000+ trouble-free operating hours.
Serial No. | Product Model (Including Part No.) | Material | Main Wear Reasons | Damage Prevention Notes |
1 | A10VS0100DRS32RVPB12N00-S1439 | Pump body: 35CrMo alloy steel (nitriding); Piston: 20CrMnTi (carburizing and quenching, HRC 60-64); Swash plate: 42CrMo with tungsten carbide coating; Valve plate: Copper-lead alloy with graphite self-lubricating layer; Seal: FKM; Bearing: GCr15 | 1. Piston-cylinder wear from hydraulic oil solid particle contamination (≥0.02mm); 2. Swash plate fatigue cracking from long-term 90%+ rated pressure operation | 1. Replace oil filter every 300 operating hours, ensure oil cleanliness meets ISO 4406 Class 13/10; 2. Install pressure monitor, avoid continuous operation above 85% rated pressure, calibrate per ISO 13709 Clause 6.3 every 1,500 hours |
2 | A4VS0250DR30RPPB13N00 | Pump body: 35CrMo alloy steel (nitriding); Piston: 20CrMnTi (carburizing and quenching); Swash plate: 42CrMo; Shaft: 40CrNiMo; Seal: FKM; Bearing: GCr15 | 1. Valve plate wear from pump-motor shaft misalignment (radial runout >0.05mm); 2. Seal leakage accelerated by hydraulic oil temperature exceeding 85°C | 1. Perform quarterly laser alignment per ISO 13709 Clause 5.2; 2. Equip oil cooler to maintain temperature ≤80°C, check oil level weekly |
Directional Control Valves
Directional control valves regulate hydraulic oil flow direction to realize actuator commutation, start, and stop. Slow response, internal leakage, or spool jamming cause uncoordinated movements, reduced precision, and safety hazards. Our valves adopt precision-ground spools and multi-layer seals, ensuring fast response (≤0.1s), low leakage (≤3ml/min), and anti-vibration performance for high-vibration environments like construction and hydraulic presses.
Serial No. | Product Model (Including Part No.) | Material | Main Wear Reasons | Damage Prevention Notes |
1 | DG4V3S2NMUH560 02-109051 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding, HV ≥850); Spring: 60Si2Mn; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation (Class F heat resistance) | 1. Spool jamming from hydraulic oil contamination and sludge accumulation; 2. Solenoid coil burnout from voltage fluctuation (deviation >±10%) | 1. Replace oil filter every 300 hours, flush system every 1,200 hours; 2. Install voltage stabilizer, monitor voltage weekly per DIN 40050-1 |
2 | DG4V3S2AMUH560 02-109030 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Spool wear from frequent commutation; 2. Seal leakage from uneven installation torque | 1. Apply molybdenum disulfide grease to spool every 200 hours; 2. Tighten mounting bolts uniformly with torque wrench per DIN 24342 Clause 6.3 |
3 | DG4V52CMUEK620 459156 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Solenoid coil failure from moisture intrusion; 2. Spool jamming from foreign objects during maintenance | 1. Seal electrical interfaces with silicone sealant, install in moisture-proof cabinet; 2. Thoroughly clean maintenance area before disassembly |
4 | 02-110790 DG5V733CT30EN55 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM; Solenoid coil: Copper wire with heat-resistant encapsulation | 1. Seal aging from high ambient temperature (＞60°C); 2. Spool jamming from hydraulic oil oxidation sludge | 1. Install heat shield near high-temperature components; 2. Replace hydraulic oil annually, add anti-oxidation additives |
5 | DG5V76C2TMUH730 02-145960 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Solenoid coil overheating from long-term energization; 2. Spool wear from high-velocity oil flow | 1. Use time relay for intermittent operation, avoid continuous energization; 2. Install in low-flow turbulence area to reduce oil impact |
6 | DG4V36CMFWH760EN21 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Spool jamming from rust particles in hydraulic oil; 2. Seal leakage from pressure cycling | 1. Add anti-rust additives, inspect for rust particles monthly; 2. Inspect seals quarterly, replace if necessary |
7 | 02-362429 DG17V4012A10 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Solenoid coil damage from electromagnetic interference; 2. Spool wear from frequent commutation | 1. Route control lines with shielded cables, ground properly; 2. Apply molybdenum disulfide grease to spool every 200 hours |
8 | 02-109336 DG5V56CTMUH710 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Seal leakage from vibration; 2. Spool jamming from hydraulic oil contamination | 1. Install vibration damping pad under valve; 2. Replace oil filter every 300 hours, use ISO 4406 Class 13/10 oil |
9 | DG4V52AJVMUH620 638591 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Spool wear from high-velocity oil flow; 2. Solenoid coil failure from moisture intrusion | 1. Install in low-flow velocity area, ensure correct flow direction; 2. Seal electrical interfaces with silicone sealant, inspect moisture monthly |
10 | DG4V36NVMUH760 871143 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Spool jamming from sludge accumulation; 2. Seal aging from long-term use | 1. Flush system every 1,000 hours; 2. Replace seals annually or when aging signs (cracking, hardening) appear |
11 | DG5V72N2TVMUH730 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Solenoid coil burnout from voltage fluctuation; 2. Spool wear from frequent commutation | 1. Install voltage stabilizer in control circuit; 2. Apply molybdenum disulfide grease to spool every 200 hours |
12 | DG5V72AMUH730 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Valve body deformation from uneven installation force; 2. Seal leakage from high-temperature operation | 1. Tighten mounting bolts uniformly with torque wrench per DIN 24342 Clause 6.3; 2. Install heat shield near high-temperature components |
13 | DG4V32C208MUHH760 02-330085 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM; Solenoid coil: Copper wire with epoxy encapsulation | 1. Spool jamming from foreign object intrusion; 2. Solenoid coil failure from moisture intrusion | 1. Clean installation area before mounting to avoid debris; 2. Seal electrical interfaces with silicone sealant |
Pressure Control Valves
Pressure control valves are core safety components that stabilize system pressure, prevent overpressure damage, and adjust pressure for different working conditions. Malfunctions like pressure instability, jamming, or leakage lead to component fatigue and catastrophic breakdowns. Our valves adopt precision pressure-adjusting mechanisms, ensuring ±2% control accuracy (ISO 4401 Clause 7.2 compliant), providing reliable protection for construction, mining, and industrial hydraulic systems.
Serial No. | Product Model (Including Part No.) | Material | Main Wear Reasons | Damage Prevention Notes |
1 | DGMX25PPAWB30 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM; Adjusting screw: 40Cr with lock nut | 1. Spool wear from high-pressure oil erosion; 2. Adjusting screw loosening from long-term vibration | 1. Install in low-flow turbulence area, ensure correct flow direction; 2. Lock screw with lock nut after pressure setting, recheck torque monthly |
2 | DGMX33PPCWB40 02-311887 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM; Adjusting screw: 40Cr | 1. Spring fatigue from long-term compression; 2. Seal leakage from high-temperature oil (＞85°C) | 1. Inspect spring elasticity every 600 hours, replace if deformed; 2. Install oil cooler to maintain temperature ≤80°C |
3 | DGMX23PPFWB40 870038 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM; Pressure sensor: Precision piezoelectric sensor | 1. Pressure sensor failure from electromagnetic interference; 2. Spool wear from frequent pressure adjustment | 1. Route sensor lines with shielded cables, ground properly; 2. Minimize frequent adjustments, calibrate every 800 hours |
4 | DGMX7PPGH20 02-352619 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM; Diaphragm: PTFE | 1. Diaphragm damage from pressure impact; 2. Spool jamming from hydraulic oil contamination | 1. Install pressure buffer upstream to absorb shocks; 2. Replace oil filter every 300 hours, use ISO 4406 Class 13/10 oil |
5 | DGMX25PBBWS30 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM; Adjusting screw: 40Cr | 1. Seal leakage from pressure cycling; 2. Spool jamming from rust particles | 1. Inspect seals quarterly, replace if necessary; 2. Add anti-rust additives to hydraulic oil |
6 | EPRV1165.00000 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM; Diaphragm: PTFE | 1. Diaphragm aging from long-term use; 2. Spool wear from high-velocity oil flow | 1. Replace diaphragm annually; 2. Install in low-flow velocity area |
7 | PCGV8AD10 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM; Adjusting screw: 40Cr with lock nut | 1. Adjusting screw loosening from vibration; 2. Seal leakage from uneven installation force | 1. Apply anti-loosening thread lock compound to screw; 2. Tighten mounting bolts uniformly with torque wrench |
8 | DGMX25PPBWB30 868314 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM | 1. Spool jamming from hydraulic oil contamination; 2. Spring fatigue from long-term compression | 1. Replace oil filter every 300 hours; 2. Inspect spring elasticity every 600 hours |
Hydraulic Cartridge Valves
Hydraulic cartridge valves feature compact structure and strong interchangeability, suitable for integrated hydraulic systems in construction machinery and industrial equipment. Jamming, internal leakage, or seal damage cause pressure loss and reduced efficiency. Our valves adopt precision machining and high-quality seals, ensuring reliable performance and easy maintenance.
Serial No. | Product Model (Including Part No.) | Material | Main Wear Reasons | Damage Prevention Notes |
1 | DGMFN5YB2W30 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM | 1. Spool jamming from hydraulic oil contamination; 2. Seal leakage from high-temperature operation | 1. Replace oil filter every 300 hours; 2. Install heat shield near high-temperature components |
2 | DGMPC5BAK30 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM | 1. Solenoid coil burnout from voltage fluctuation; 2. Spool wear from frequent commutation | 1. Install voltage stabilizer in control circuit; 2. Apply molybdenum disulfide grease to spool every 200 hours |
3 | 02-352689 DGMFN7YA2HB2H20 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM | 1. Seal leakage from vibration; 2. Spool jamming from foreign object intrusion | 1. Install vibration damping pad under valve; 2. Clean installation area before mounting |
4 | 870023 DGMPC3BAK41 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM | 1. Spool wear from high-velocity oil flow; 2. Seal aging from long-term use | 1. Install in low-flow turbulence area; 2. Replace seals annually or when aging signs appear |
5 | DGMC3BTGW41 02-108133 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM | 1. Valve body deformation from uneven installation force; 2. Spool jamming from rust particles | 1. Tighten mounting bolts uniformly with torque wrench; 2. Add anti-rust additives to hydraulic oil |
6 | DGMC7PTGH20 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM | 1. Solenoid coil failure from moisture intrusion; 2. Spool wear from frequent pressure cycling | 1. Seal electrical interfaces with silicone sealant; 2. Minimize frequent pressure cycling, inspect spool every 800 hours |
7 | DGMDC3YAKBK41 02-109849 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM | 1. Seal leakage from pressure impact; 2. Spool jamming from sludge accumulation | 1. Install pressure buffer upstream; 2. Flush system every 1,200 hours |
8 | DGMDC3YANBN41 02-157848 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 55CrSi; Seal: FKM | 1. Spool wear from hydraulic oil contamination; 2. Spring fatigue from long-term compression | 1. Use ISO 4406 Class 13/10 oil; 2. Inspect spring elasticity every 600 hours |
9 | DGMPC3DABK41 | Valve body: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Spring: 60Si2Mn; Seal: FKM | 1. Seal leakage from uneven installation force; 2. Spool jamming from foreign object intrusion | 1. Tighten mounting bolts uniformly with torque wrench; 2. Clean installation area before mounting |
Hydraulic Valves & System Accessories
Hydraulic accessories (solenoid valve bases, connectors, flow control valves) ensure stable system operation, reliable connection, and easy maintenance. Malfunctions cause leakage, poor connection, or valve failure. Our accessories adopt high-quality materials and standard interfaces, ensuring seamless compatibility and reliable performance for various hydraulic systems.
Serial No. | Product Model (Including Part No.) | Material | Main Wear Reasons | Damage Prevention Notes |
1 | MCSCJ024DG000010 | Housing: Aluminum alloy; Connector: Brass; Seal: FKM; Spring: 55CrSi | 1. Connector loosening from long-term vibration; 2. Seal aging from long-term use | 1. Tighten connector monthly, apply anti-loosening thread lock; 2. Replace seal annually |
2 | DGPC06A51 575067 | Housing: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Seal: FKM; Spring: 60Si2Mn | 1. Spool jamming from foreign object intrusion; 2. Seal leakage from bolt loosening | 1. Clean installation area before mounting; 2. Tighten bolts uniformly with torque wrench |
3 | MCSCH230AG000010 | Housing: Aluminum alloy; Solenoid coil: Copper wire with epoxy encapsulation; Core: 1.4021 alloy steel; Seal: FKM | 1. Solenoid coil burnout from voltage fluctuation; 2. Core jamming from rust | 1. Install voltage stabilizer; 2. Add anti-rust additives, inspect core monthly |
4 | SV4100M024DG | Housing: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Seal: FKM; Spring: 55CrSi | 1. Seal leakage from vibration; 2. Spool jamming from hydraulic oil contamination | 1. Install vibration damping pad; 2. Replace oil filter every 300 hours |
5 | 566302 FCV616S0NV | Housing: Aluminum alloy; Connector: Brass; Seal: FKM; Internal components: Glass fiber-reinforced engineering plastic | 1. Seal leakage from high temperature; 2. Internal component damage from vibration | 1. Install heat shield near high-temperature components; 2. Install vibration damping bracket |
6 | CVCS25C3W35020 | Housing: 35CrMo alloy steel; Spool: 42CrMo (nitriding); Seal: FKM; Spring: 60Si2Mn | 1. Spool wear from frequent commutation; 2. Seal leakage from uneven installation force | 1. Apply molybdenum disulfide grease to spool every 200 hours; 2. Tighten bolts uniformly with torque wrench |
7 | CGR-02-C-21UG 到C30 | Housing: Aluminum alloy; Connector: Brass; Seal: FKM; Spring: 55CrSi | 1. Connector corrosion from moisture; 2. Seal leakage from pressure cycling | 1. Seal connector with silicone sealant; 2. Inspect seals quarterly, replace if necessary |
8 | POC1-10-S-0-030 | Housing: 304 stainless steel; Seal: FKM; Connector: Copper alloy; Spring: 55CrSi | 1. Housing corrosion from corrosive media; 2. Seal leakage from uneven installation force | 1. Use corrosion-resistant hydraulic oil, inspect corrosion monthly; 2. Tighten bolts uniformly with torque wrench |
Procurement Guidance
Our hydraulic components are manufactured in strict compliance with ISO 4401, ISO 13709, and DIN 24342 international standards, 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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