Rexroth PVQ mobile version fixed displacement vane hydraulic pump

The PVQ is a fixed-displacement vane pump manufactured by Bosch Rexroth, a Bosch Group company and one of the world's leading suppliers of hydraulic components. Unlike axial piston pumps that vary output through a swash plate, the PVQ delivers a constant flow rate per shaft revolution — hence "fixed displacement."

Inside the pump, a rotor fitted with sliding vanes turns inside a cam-profiled stator ring. Centrifugal force (and in some designs, spring assistance) pushes the vanes outward against the ring, trapping fluid in the pockets formed between adjacent vanes. As the rotor turns, these pockets carry fluid from the inlet to the outlet port, generating steady, pulsation-free flow.

Core Design Features

Hydraulically unloaded shaft and vanes — reduces bearing wear and extends component life

Exchangeable pump cartridge — allows the wear-prone core to be serviced without replacing the entire housing

Clockwise or counterclockwise rotation options — improve flexibility during system design

Cylindrical or splined drive shaft options

Selectable pressure port position — simplifies plumbing in tight installations

Double-pump configuration capability — two cartridges on one shaft for higher combined flow in a compact footprint

The Mobile Version: What Makes It Different

While the PVQ platform originated largely in industrial stationary hydraulics, its mobile-duty variant is engineered to withstand the harsher operating environment of off-highway and mobile machinery, including constant vibration, wide temperature swings, dust ingress, variable duty cycles, and less forgiving maintenance schedules.

Key Adaptations for Mobile Use

Reinforced sealing and mounting to resist vibration fatigue common in tractors, aerial platforms, and construction equipment

Broader thermal tolerance for engine-bay or PTO-driven mounting locations

SAE-style mounting flanges and shaft options to match mobile-standard gearboxes and power take-offs, rather than industrial coupling conventions

Compatibility with mineral oil, and in some configurations, biodegradable or fire-resistant fluids, which matters for forestry, agriculture, and marine applications

Simplified cartridge-level service is valuable when the equipment operates far from a service depot

In practice, this means a mobile PVQ pump can be bolted directly to a tractor's PTO gearbox or an excavator's auxiliary drive and expected to run reliably through dusty, hot, or wet field conditions — something a purely industrial-spec pump isn't necessarily built to guarantee.

Where the PVQ Mobile Pump Is Used

Example 1: Agricultural Machinery

A tractor's front loader or three-point hitch needs steady, predictable hydraulic power regardless of engine RPM fluctuations during fieldwork. A fixed displacement PVQ pump mounted to the PTO delivers that consistency without the added complexity — and cost — of a variable displacement pump, which is often overkill for these duty cycles.

Example 2: Aerial Work Platforms and Lifts

Scissor lifts and boom lifts rely on smooth, low-noise hydraulic actuation, particularly in environments like warehouses or indoor construction, where operator comfort and low vibration matter. The PVQ's low operating noise and pulsation-free output make it a natural fit for lift and platform hydraulics.

Example 3: Construction and Material Handling Equipment

Auxiliary circuits on skid steers, compact loaders, and material handlers — such as tilt, auxiliary hydraulics for attachments, or cooling fan drives — often use fixed displacement vane pumps because the flow demand is predictable and doesn't justify a variable pump's added cost and control complexity.

Example 4: Marine and Forestry Equipment

Where biodegradable hydraulic fluids are mandated by environmental regulation, the PVQ's fluid compatibility options make it a practical choice for winches, cranes, and steering systems on vessels and forestry machinery.

For more information on the PVQ vane pump, please visit https://www.baolilaihydraulic.com/product/.

Specifications

Selection Table

Q1: How long does a PVQ vane pump typically last?

A1: Service life depends heavily on fluid cleanliness, operating pressure relative to the pump's rating, and inlet conditions. Rexroth's hydraulically unloaded shaft and vane design is specifically intended to extend bearing and vane life compared to unbalanced vane pump designs, but real-world life varies by application and duty cycle.

Q2: Can a PVQ pump be repaired, or does it need full replacement?

A2: In most cases, the pump cartridge can be replaced independently of the housing, which is significantly more economical than replacing the entire unit — provided the housing, shaft, and seals haven't sustained separate damage.

Q3: How to purchase a PVQ vane pump?

A3: You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.

Q4: What is the price and delivery time of the PVQ vane pump?

A4: The specific price and delivery time will be provided based on the specific model you provide.