HYDM083 Hydraulic Motor | 0.50 cid Displacement

HYDM083 Low-Displacement Hydraulic Motor

Product Role & System Position

• Low-displacement HYDM083 hydraulic motor engineered for compact, precision-controlled hydraulic drive systems.
• Designed for direct-drive pairing with small Annovi Reverberi (AR) triplex plunger pumps and auxiliary hydraulic accessories.
• Optimized for installations where smooth torque delivery, tight packaging, and predictable alignment are required.
• Commonly integrated on mobile wash skids, service bodies, enclosed vans, plant carts, and compact utility platforms.
• Supports rigid, coaxial motor-to-pump mounting to eliminate belt drives and alignment drift.

Displacement & Speed Characteristics

• Rated displacement HYDM083 of 0.50 cubic inch per revolution (approximately 8.2 cc/rev).
• Low displacement enables precise speed control when driven from variable-flow hydraulic sources.
• Well matched to small-frame AR pumps operating in moderate flow and pressure ranges.
• Supports stable pump RPM without overspeeding when properly sized to available hydraulic flow.
• Ideal for single-gun systems and auxiliary wash functions requiring predictable output.

Hydraulic Sizing Guidance

• Motor displacement HYDM083 selected to match target pump RPM under load using available hydraulic flow.
• Sizing begins at the nozzle: define required flow and pressure, select the AR pump, then confirm motor speed capability.
• Standard sizing references:
  • RPM ≈ 231 × hydraulic GPM ÷ displacement (cid).
  • Torque (lb-in) ≈ displacement (cid) × PSI ÷ 6.283.
  • Hydraulic horsepower ≈ GPM × PSI ÷ 1714 (apply efficiency for real shaft power).
• With 0.50 cid displacement, motor speed is approximately 462 × hydraulic GPM.
• Typical operating examples:
  • 3.0 GPM hydraulic flow yields approximately 1385 RPM.
  • 2.5 GPM hydraulic flow yields approximately 1155 RPM.

Torque Output Range

• Torque output scales directly with system pressure.
• Estimated torque values:
  • Approximately 120 lb-in at 1500 PSI.
  • Approximately 159 lb-in at 2000 PSI.
• Torque levels are suitable for driving small AR triplex pumps without shock loading.
• Smooth torque delivery supports calm trigger cycling and stable nozzle pressure.

Circuit Protection & Cooling Requirements

• Upstream hydraulic relief valves must be set correctly for the intended duty pressure.
• Return-line filtration specified at 10–25 micron with an appropriate beta rating.
• Reservoir volume sized for heat rejection using a practical rule of 2–3× total system flow.
• Oil cooling recommended for hot environments, extended bypass operation, or continuous-duty service.
• Many low-displacement LSHT motors operate without a case drain; confirm requirements from the motor datasheet.
• If a case drain is present, it must be routed back to the reservoir above oil level and never restricted.

Mounting & Alignment Considerations

• Designed for use on rigid mounting bases that hold motor and pump on a shared centerline.
• Coaxial alignment minimizes side loading on pump bearings and seal packs.
• Direct-drive HYDM083 configuration eliminates belt tensioning, belt dust, and guard bulk.
• Rigid alignment supports cooler operation and reduced vibration over long duty cycles.
• Open access around the coupling simplifies inspection and torque verification.

Water-Side System Integration

• Typically paired with small AR pump frames such as RK and RK21xx series.
• Common pump porting includes 1/2″ F-BSPP inlet and 3/8″ F-BSPP outlet.
• Adapters to NPT are readily available where required.
• Suction plumbing should be short, straight, and oversized from a flooded supply.
• Anti-collapse suction hose and coarse inlet strainer recommended to prevent cavitation.
• Adjustable unloader and correctly sized high-pressure relief valve required for system protection.
• Thermal relief valve recommended on bypass loop for extended gun-closed operation.

Applications & Use Cases

• Compact single-gun wash skids and DI rinse carts.
• Parts-cleaning cells and plant maintenance carts.
• Utility platforms with existing hydraulic power.
• Municipal and DOT fleet equipment.
• Rental turn-back units, building services, and contractor rigs.
• Light industrial washdown and equipment rinse stations requiring precise speed control.

HYDM083 Hydraulic Motor | 0.50 cid Displacement

Key Functional Advantages

• Low displacement supports fine control of pump speed and pressure.
• Compact round-body design fits tight installation envelopes.
• Smooth torque delivery improves pressure stability at the nozzle.
• Direct-drive compatibility reduces maintenance and mechanical losses.
• Supports clean, repeatable OEM builds and simplified field service.
• Well suited for professional hydraulic-driven wash systems where reliability and packaging efficiency are critical.