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45VQ Vane Pumps - Rotary Vane Pump

Model:
45VQ Vane Pumps
Brand:
Green Hydraulic

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Product Description

45VQ Vane Pumps

Overview

The 45VQ is a heavy-duty fixed displacement balanced vane pump derived from Vickers VQ series. Designed for high-flow, high-pressure hydraulic systems, it runs steadily with low noise and high volumetric efficiency. Adopting modular cartridge construction, it allows quick pump core replacement without full pump disassembly. Ports are rotatable by 90° for flexible piping layout. Single pump and tandem through-drive versions are available to meet multi-circuit demands. Its robust cast housing suits both industrial and mobile machinery with a continuous working pressure up to 172 bar.

Features and Benefits

Balanced intra-vane structure reduces pressure pulsation and extends service life.
Interchangeable cartridge cuts maintenance downtime and repair costs.
Rotatable inlet/outlet ports for easy installation and pipeline arrangement.
High volumetric efficiency delivers stable output and lower energy consumption.
Optional tandem design supports dual independent hydraulic circuits.
Multiple shafts and seal options fit various hydraulic fluids and equipment.

Specification

series	Flow code (USgpm)	Geometric displacement mL/r	Max.operating pressure Mpa	Max.speed r/min	Min. speed r/min
45VQ	42	134(8.17)	17.5	2400	600
45VQ	45	143(8.72)	17.5	2400	600
45VQ	50	159(9.70)	17.5	2200	600
45VQ	57	181(11.05)	17.5	2200	600
45VQ	60	189(11.53)	17.5	2200	600
45VQ	66	210(12.81)	17.5	2200	600
45VQ	75	237(14.46)	14	2200	600

Applications

Industrial: Injection molding machines, hydraulic presses, metallurgical stations
Mobile: Loaders, rollers, cranes, agricultural machinery
Others: Marine hydraulic systems, mining auxiliary equipment

FAQ of 45VQ Vane Pumps

Q: What are the rated pressure and applicable working conditions of 45VQ pumps?
A: Continuous pressure 17.5 MPa, peak pressure 21 MPa. Suitable for heavy-duty equipment with large flow such as injection molding machines, hydraulic presses and construction machinery.
Q: What hydraulic oil is recommended?
A: Standard AW hydraulic oil ISO VG32/VG46. Operating oil temperature: 38–82°C; fluid cleanliness standard: NAS 8–12.
Q: Why does the pump produce loud whistling noise during operation?
A: Mostly caused by air suction, blocked suction filter, overly cold oil or worn cam ring and vanes inside the pump.
Q: How to fix low system pressure that cannot reach the target value?
A: Internal leakage from worn side plates and vanes, stuck relief valve or hydraulic oil with too low viscosity.
Q: What solutions for insufficient flow and slow cylinder movement?
A: Replace the worn cartridge kit, clean stuck vanes, bleed air from pipelines and repair air leakage on suction lines.
Q: What causes oil temperature to rise rapidly above 85°C?
A: Long-term overpressure operation, severe internal pump leakage or insufficient heat dissipation of the cooler; replace the cartridge or clean the radiator as needed.
Q: How to solve oil leakage at the shaft end or pump housing?
A: Worn shaft oil seal, uneven tightening of cover bolts, damaged O-rings or scratched drive shaft surface.
Q: What key pre-start steps for new pumps?
A: Fill the pump housing fully with hydraulic oil, confirm correct rotation direction, turn the shaft manually without jamming, and run under no load for 5–10 minutes before boosting pressure.
Q: Can we replace only the cartridge instead of the whole pump?
A: Yes. The 45VQ pump adopts a separate cartridge design; the cam ring, rotor and vane kit can be replaced individually.
Q: What damage will dry running or reverse rotation bring?
A: Dry running will damage the cartridge irreparably within seconds. Reverse rotation leads to zero flow, broken vanes and permanent deformation of the cam ring.

Packaging & Delivery

45VQ Vane 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.