Hydraulic vane pumps are employed across numerous industries, from automotive and aerospace to food processing. These pumps feature a sealed cavity with a rotor and attached vanes, and they excel in handling low-viscosity fluids. For instance, the beverage carbonators at fast-food restaurants are powered by hydraulic vane pumps.

Beyond manufacturing and delivery, these pumps are also found in end-user products like automobiles, where they are used for power steering and air conditioning.

A true indicator of the technology’s reliability is its longevity. Patented in 1874, hydraulic vane pumps have been used for almost 150 years, and their popularity continues to grow. MAC Hydraulics is a long-standing expert in these pumps and can address any questions you may have.

### How Do Hydraulic Vane Pumps Create Pressure?

Car Lift Repair Tampa Florida Hydraulic vane pumps generate pressure by compressing hydraulic fluid into a smaller area before releasing it back into the system. This process involves sliding vanes, inlet and discharge holes, and an off-center drive shaft. Fluid enters the pump chamber through inlet holes, driven by atmospheric pressure. Inside the chamber, fluid collects between two vanes attached to the driveshaft. The drive shaft’s off-center rotation causes the vanes to press against the chamber wall, reducing the space between them, which increases the fluid pressure. This pressurized fluid is then expelled from the pump when the pressure peaks.

### Advantages of Hydraulic Vane Pumps

**Versatility**: Vane pumps handle a wide range of low to medium viscosity fluids, making them suitable for various industries. They can move fluids such as:

– Alcohols

– Solvents

– Refrigeration fluids (freons and ammonia)

– Aqueous solutions

– Aerosols

– Fuels and lubricants

– Fuel transfers and de-icing

**Maintenance**: These Car Lift Repair Tampa Florida pumps are well-lubricated internally and have minimal metal-to-metal contact, simplifying maintenance. The vanes, which are the most wear-prone components, are inexpensive and easy to replace.

**Running Volume**: Properly functioning vane pumps operate quietly, which is beneficial for maintaining a low noise level in manufacturing facilities.

**Reliability**: When built and maintained correctly, hydraulic vane pumps are highly reliable and durable, potentially lasting a lifetime with proper care.

### Limitations of Hydraulic Vane Pumps

Like any system, hydraulic vane pumps have their limitations. They are not suitable for very high viscosity fluids, extremely high pressures, or fluids with abrasive contaminants.

**Common Cause of Failure: Dirty Fluid**: Dirty fluid contributes to over 80% of hydraulic vane pump failures. Abrasive contaminants can wear down vanes and other components. Installing and maintaining filtration systems and conducting quality control checks on new fluid can prevent these issues.

**Common Issue: Cavitation Damage**: Cavitation occurs when air bubbles in the fluid implode, generating heat and causing extensive damage. This can degrade the hydraulic fluid and wear down metal components. To prevent cavitation, ensure optimal inlet velocity, check for flow restrictions, maintain recommended rpm levels, and keep filters clear.

### Signs of Failing Hydraulic Vane Pumps

Despite their reliability, hydraulic vane pumps can malfunction:

**Noisy Operation**: Unusual noises, such as knocking or banging, indicate air presence or low pressure. Loud whirring may signify extensive damage.

**Leaking**: External leakage around the pump points to seal failure or a bent rod. Early detection can lead to repairs instead of replacements.

**Poor Performance or Excessive Heat**: Reduced efficiency, frequent pressure drops, and excessive heat signal the need for professional inspection.

### Conclusion

Hydraulic vane pumps are crucial in various applications due to their versatility, reliability, and efficiency. Regular maintenance, proper fluid handling, and monitoring for early signs of issues can ensure their longevity and optimal performance.

A Car Lift Repair Tampa Florida ane pump is a self-priming, positive displacement pump that delivers consistent flow at varying pressures. Typically, it operates via a motor connected to a gearbox, with a maximum speed of 900 rpm. The pump includes a relief valve to prevent excessive pressure buildup that could damage the pump.

The pump head contains a slotted rotor with vanes that create segmented chambers, allowing for self-priming as these chambers function similarly to valves. Vane pumps are made from various materials such as bronze, stainless steel, PVDF, carbon, or aluminum, making them compatible with multiple fluids.

The circular pump head has a flat portion where the vanes move in and out of the rotor as it rotates within the casing. Centrifugal force pushes the vanes outward, keeping them tight against the casing and self-compensating for wear. As the vanes reach the pump outlet, the casing’s shape forces the vanes into the rotor, expelling the fluid.

### Vane Pump Working Principle

Car Lift Repair Tampa Florida Vane pumps are reversible, making them ideal for both stripping and unloading tanks. They can also be operated in reverse to fill tanks or load vehicles. Typically, vane pumps come with either a single mechanical seal, a double mechanical seal with barrier fluid, or gland packing.

These Car Lift Repair Tampa Florida pumps are commonly used for viscous, lubricating fluids such as oils, petroleum, diesel, animal oils/blood, and fuel oil. They can also handle non-lubricating fluids like solvents due to the absence of metal-to-metal contact. Vane pumps self-compensate for wear, maintaining peak performance without loss of flow rate.

### Advantages and Disadvantages


– Can handle viscous fluids up to 10,000 cst.

– ATEX rated for flammable liquids.

– Heating chamber keeps solidifying liquids at low viscosity.

– High suction lift capability and can self-prime up to 8 meters.

– Reversible operation for loading and unloading.

– Flow rate remains stable despite changes in back pressure.

– Self-compensating for wear, maintaining efficiency.

– Multiple sealing options for a wide range of liquids.


– Requires a gearbox, making it larger and heavier than other designs.

– Cannot handle solids or abrasives.

– Limited to handling viscosities up to 10,000 cst.

### Vane Pumps vs. Other Pump Types

**Vane Pumps vs. Gear Pumps:**

– Vane pumps are more efficient and handle higher viscosities.

– Vane pumps lack metal-to-metal contact, allowing for dry priming and handling non-lubricating fluids.

– Car Lift Repair Tampa Florida Gear pumps offer more precise dosing and metering but require more maintenance due to timing gears.

**Vane Pumps vs. Liquid Ring Pumps:**

– Vane pumps have more sealing options.

– Liquid ring pumps typically have fewer sealing options.

**Vane Pumps vs. Centrifugal Pumps:**

– Vane pumps maintain flow with increased viscosity, while centrifugal pumps experience a drop in flow.

– Car Lift Repair Tampa Florida Centrifugal pumps can handle solids and abrasives with the right impeller design.

### FAQs

**Can this pump run dry?**

No, vane pumps should not run dry. The vanes and mechanical seal require lubrication from the pumped fluid. Running dry can cause irreversible damage, overheating, and potential motor burnout. To prevent dry running, use level sensors or a float switch to ensure the pump is turned off if fluid levels drop, or consider fitting a dry running device.