Atlas Copco PZB09-L-AR500-21 | PZB09 Piston Air Motor — Reversible, Aluminum, NEMA Flange

Built on a NEMA flange, the Atlas Copco PZB09-L-AR500-21 is a 0.09 kW (0.12 hp) centrifugal piston air motor turning 2.5 Nm (1.85 ft-lb) at 350 RPM with 5 Nm (3.7 ft-lb) of stall torque. Fully reversible, 1.70 kg (3.1 lb), and 25 to 40 percent easier on air than a vane alternative.

Performance at a Glance

This piston motor delivers 2.5 Nm (1.85 ft-lb) at 350 RPM peak output, with 5 Nm (3.7 ft-lb) minimum starting torque and 5 Nm (3.7 ft-lb) stall torque. Centrifugal piston technology enables reliable high-torque starting at extremely low speeds — a performance envelope no vane motor can match below 100 RPM. Consumes 25–40% less compressed air than equivalent vane motors.

Technical Specifications

Key Features

• Max Output Power: 0.09 kW (0.12 hp) at 6.3 bar (91 psi) — rated for continuous-duty operation in fixed-plant and automation environments
• Rotation: Fully Reversible—switchable by reversing air connections, no disassembly required
• Lubrication-Free Piston Design: Lubrication-free construction eliminates in-line air oilers and prevents lubricant contamination of your process or product — ideal for food, pharma, and clean manufacturing environments.
• ATEX Certified — Ex II 2 G Ex h IIC T6 Gb (gas) and Ex II 2 D Ex h IIIC T85°C Db (dust), to EU Directive 2014/34/EU, for ambient temperatures up to +40°C (104°F). Safe for use in classified areas where electric motors are prohibited.
• Output Shaft — Keyed (loading code a): Keyed output shaft for direct integration into existing drive trains, couplings, sprockets, and IEC/NEMA machine interfaces
• Overload Safe: Stalls harmlessly under overload; self-starts when load is removed — no thermal protection, burnout risk, or electronic fault recovery needed
• Infinitely Variable Speed: Regulate output speed and torque via inlet pressure or flow control valve — no electronic drives or VFDs required
• IP65 Rated: Sealed against dust ingress and low-pressure water jets for washdown and dusty installations
• Atlas Copco Quality: Designed and manufactured to ISO 9001 standards; global spare parts and service network with application engineering support

Ideal Applications

• Drop-in replacement for electric gearmotors in ATEX zones
• Precise low-speed actuation in cleanroom and automation
• White room and food-grade automation lines
• Stop-start high-cycle actuation applications
• Hazardous area installations requiring ATEX certified pneumatic drives
• Environments where electric motors present ignition, EMI, or water ingress risks

The PZB piston motor's centrifugal piston design achieves high starting torque at extremely low speeds — a performance profile no vane motor can match below 100 RPM. The fully reversible pneumatic circuit enables bidirectional operation without external flow-switching valves, simplifying installation and reducing component count.

The aluminium housing mates directly to standard IEC and NEMA motor flanges, making drop-in replacement of electric gearmotors straightforward — with all the inherent safety advantages of pneumatic drive in ATEX and explosion-risk zones. A built-in inductive sensor port (M5) enables easy closed-loop speed monitoring.

Air consumption at maximum output is 3 l/s (6.4 cfm). External parts are hardened steel and aluminium. Inlet and outlet hose size 0.25 in.

Part Number: PZB09-L-AR500-21 | EDP: 8411409026 | Performance data at 6.3 bar (91 psi). For full performance curves and dimensional drawings, see the Atlas Copco Industrial Air Motor Catalogue.