 |
2520VQ is a double balanced vane pump combining 25VQ large pump and 20VQ small pump in one housing. This tandem integrated pump provides two independent oil outputs with different flow rates from a single drive shaft. It features modular replaceable cartridges, rotatable SAE ports and sturdy cast iron body. With stable pressure performance, low vibration and high efficiency, it works for dual-circuit hydraulic systems. Continuous working pressure reaches 172 bar, fitting compact industrial and light mobile equipment with limited installation space.
Tandem dual pump design supplies two separate hydraulic circuits with one power source.
Interchangeable pump cartridges enable fast on-site maintenance.
Rotatable inlet and outlet ports simplify pipeline layout.
Balanced vane structure lowers noise, pressure fluctuation and wear.
High volumetric efficiency reduces power loss during long operation.
Multiple shaft and seal selections adapt to different hydraulic media.
Injection molding machines, die-casting machines, hydraulic machine tools, small loaders, agricultural machinery, packaging equipment, light engineering machinery
FAQ of 2520VQ Double Pumps
Q: What is the performance parameter of 2520VQ double vane pump?
A: It is a compound pump combining 25VQ + 20VQ. Continuous working pressure 17.5 MPa, peak pressure 21 MPa, with two independent oil outlets for dual-circuit hydraulic systems.
Q: What equipment is 2520VQ commonly used for? A: Injection molding machines, small hydraulic presses, die casting machines, metal cutting machine tools and light construction machinery that require high-low flow dual loops. Q: Which hydraulic fluid is suitable for this pump? A: ISO VG32 / VG46 anti-wear mineral hydraulic oil. Working temperature range 38–82°C, oil cleanliness requirement NAS 8–12. Q: The pump makes harsh whistling noise during operation, what’s the reason? A: Air intake from loose suction pipeline, clogged suction filter, excessively cold hydraulic oil or worn internal vanes and cam rings. Q: The system cannot reach the set working pressure, how to troubleshoot? A: Internal leakage caused by worn side plates and pump cartridges, stuck relief valve, or hydraulic oil with insufficient viscosity. Q: Slow action of hydraulic cylinders with insufficient output flow? A: Replace worn cartridge assemblies, clean stuck vanes, exhaust air in pipelines, and check for air leakage at suction ports. Q: Rapid overheating of hydraulic oil exceeding 85°C? A: Long-term overpressure operation, serious internal leakage inside the pump, or insufficient heat dissipation of the cooling system. Replace cartridges or clean the cooler accordingly.
Q: Oil leakage on the pump shaft seal or pump body surface?
A: Aging and damaged shaft oil seal, uneven tightening of housing bolts, broken sealing O-rings, or scratches on the drive shaft surface. Q: Can I replace the pump cartridge separately instead of the whole double pump? A: Yes. The front 25VQ cartridge and rear 20VQ cartridge are independent and replaceable separately without removing the entire pump housing. Q: What hazards will dry running and reverse rotation cause? A: Dry running will permanently damage the pump core in a short time. Reverse rotation results in no oil output, cracked vanes and irreversible abrasion of cam rings.
2520VQ Double Pumps are typically packaged securely to prevent damage during transit. The packaging includes:
Protective Wrapping: To safeguard the high-precision pump body and shaft from moisture and environmental damage.
Custom Cartons or Crates: Individual reinforced packaging with shock-absorbent inserts for single pumps, and sturdy wooden crates for bulk or tandem pump orders to ensure safe handling.
Documentation: Includes technical data sheets, installation guides, and quality inspection certificates.
Delivery time depends on the specific model, port configurations, and destination but typically ranges from 1 to 4 weeks from the order date.
Pumps are manufactured in compliance with international standards, ensuring high performance and reliability:
ISO 9001: Certified for quality management systems.
CE Certification: Ensures compliance with European safety, health, and environmental protection standards.
RoHS Compliance: Ensures the pump does not contain hazardous materials.
Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.
