Aerial work platforms (e.g., scissor lifts, boom lifts, cherry pickers) rely on hydraulic systems for safe and precise lifting, extending, stabilizing, and positioning. Below is a detailed breakdown of key hydraulic components, along with high-market-share products and models:

1. Hydraulic Pumps

Role: Generate fluid flow to power cylinders and motors for lifting, extending, and steering.
Common Types:

• Gear pumps (fixed displacement, cost-effective for basic lifts).

• Piston pumps (variable displacement for energy-efficient, high-pressure applications).
  Top Models:

• Bosch Rexroth AZPF Series (e.g., AZPF-11): Compact gear pumps for scissor lifts.

• Parker Hannifin PGP Series (e.g., PGP505): Low-noise gear pumps for indoor platforms.

• Eaton 7031 Piston Pump: High-pressure, variable displacement for boom lifts.

• Danfoss 90 Series: Closed-circuit pumps for energy-efficient mobile platforms.

2. Hydraulic Cylinders

Role: Lift/lower platforms, extend booms, and stabilize the machine.
Common Types:

• Telescopic cylinders (multi-stage for long reach in boom lifts).

• Double-acting cylinders (precision control in scissor lifts).
  Top Models:

• Parker Hannifin DP Series: Robust cylinders for scissor lift mechanisms.

• Eaton CMA Series: Corrosion-resistant telescopic cylinders for outdoor use.

• Bosch Rexroth CDL1 Series: Compact cylinders for confined spaces in cherry pickers.

• Hydac HSK Series: Customizable stroke lengths for stabilizers.

3. Hydraulic Motors

Role: Drive wheels, rotate booms, or power hydraulic cooling fans.
Common Types:

• Orbital motors (high torque for rotation).

• Gear motors (simple, durable for wheel drives).
  Top Models:

• Parker F11/F12 Series: Orbital motors for smooth boom rotation.

• Eaton Char-Lynn SAA25: High-torque motors for drivetrains.

• Danfoss OMM/OMV Series: Gear motors for wheel drives in mobile AWPs.

4. Directional Control Valves

Role: Regulate fluid flow to control lifting, extending, and stabilization.
Common Types:

• Proportional valves (precise, smooth motion control).

• Solenoid valves (automated functions).
  Top Models:

• Bosch Rexroth 4WRPEH: Proportional valves for precise boom positioning.

• Parker D1VW Series: Manual spool valves for scissor lifts.

• Danfoss PVG Series: Proportional valves with integrated electronics.

5. Hydraulic Hoses & Fittings

Role: Transport fluid while accommodating movement and high pressure.
Key Features: Flexibility, abrasion resistance, and high burst pressure.
Top Models:

• Parker 79SC Series: Thermoplastic hoses for tight bends.

• Gates Global Spiral: High-pressure hoses for boom extensions.

• Eaton Aeroquip FC332: Lightweight, durable hoses for mobile platforms.

6. Hydraulic Power Units (HPUs)

Role: Compact systems integrating pumps, motors, and reservoirs for electric AWPs.
Top Models:

• Bosch Rexroth CytroPac: Low-noise, modular HPUs.

• Parker Hannifin Custom HPUs: Tailored for scissor lifts.

• Danfoss PLUS+1: Smart HPUs with IoT connectivity.

7. Accumulators

Role: Stabilize pressure, absorb shocks, and enable emergency lowering.
Common Types: Bladder, piston, or diaphragm accumulators.
Top Models:

• HYDAC SB Series: Bladder accumulators for emergency functions.

• Eaton LA Series: Piston accumulators for high-pressure systems.

8. Hydraulic Filters & Reservoirs

Role: Maintain fluid cleanliness and storage.
Top Models:

• Donaldson P Series: High-efficiency return-line filters.

• HYDAC HDU Series: Suction filters with contamination sensors.

• Parker Hannifin Compact Reservoirs: Integrated breathers and baffles.

9. Load-Sensing Systems

Role: Optimize energy use by matching pump output to load demands.
Top Models:

• Danfoss PVED Valves: Integrated load-sensing for efficiency.

• Bosch Rexroth LUDV Systems: Balanced flow distribution in multi-function AWPs.

10. Proportional Pressure Relief Valves

Role: Prevent overloading and enable adjustable force limits.
Top Models:

• Sun Hydraulics RPEC Series: Adjustable relief valves.

• Bosch Rexroth DBET Series: Proportional pressure control.

Application Examples

• Scissor Lifts: Parker DP cylinders lift the platform, driven by Bosch Rexroth AZPF pumps.

• Boom Lifts: Eaton CMA telescopic cylinders extend the boom, controlled by Danfoss PVG valves.

• Stabilizers: HYDAC HSK cylinders deploy outriggers, with Sun Hydraulics RPEC valves ensuring safety.

• Mobile AWPs: Danfoss OMM motors drive wheels, paired with Eaton Char-Lynn motors for steering.

Industry Trends

• Electro-Hydraulic Integration: IoT-enabled systems (e.g., Danfoss PLUS+1) for remote diagnostics.

• Energy Efficiency: Load-sensing pumps and regenerative circuits to cut power use.

• Compact Designs: Lightweight components from Parker and HYDAC for space-constrained AWPs.

Major AWP brands like JLG, Genie, and Haulotte source hydraulic components from these manufacturers to ensure reliability, safety, and compliance with global standards.