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Hydraulic Component Test Stand

The Starline Model SL1200-15 is a hydraulic component test stand designed to test aircraft components using hydraulic flow and pressure. The system can exercise an actuator in both directions or simply provide pressure and flow through a separate set of hoses. It has the ability to perform high-pressure static testing of components for leaks and operation using a hand pump. The test stand has a polycarbonate panel test chamber for lighting and viewing, and the cabinet is constructed from 304 stainless steel. The system is controlled and safety monitored using a PLC with an HMI panel and a rotating arm for proper positioning.

The following are the technical specifications of the system:

Fluid system:

  • Adjustable flow rate: 1 – 15gpm (56.8 lpm)
  • Adjustable pump pressure: 400 – 5000psi (344.8 bar)
  • Hand pump: up to 10,000psi (689.6 bar)
  • Pressure safety relief valve: 5300psi (365.4 bar)
  • Filtration (cartridge type replaceable elements): pressure (3-micron), return (10-micron), water removal filter, particle (3-micron), and hand pump (3-micron)
  • Supply/return hoses: 3/4 inch diameter (19mm)
  • Shut-off valve for supply, return, System A and System B outputs
  • System bypass valve PLC controlled
  • Directional valve, closed center, System A / System B, PLC control
  • Hydraulic oil type: MIL-PRF-83282 or equivalent

Fluid reservoir and controls:

  • Capacity: 28 gallons (106 L)
  • Fluid level sight glass
  • Low level and High level sensors, PLC alarms
  • Recirculation pump: 1hp electric motor, independent from main motor operation
  • Includes connection ports for mobile hydraulic fluid purifier unit

Fluid heat exchanger and control:

  • Heat exchanger motor: 1/2 hp motor
  • Independent control to allow cooling without main pump running
  • Thermocouple probe
  • PLC thermostat control with adjustable on/off settings


  • Air-cooled TEFC main motor, 50hp
  • Power requirements: 3 phase, 50/60Hz, 380/460VAC
  • Main circuit breaker electrical disconnect
  • Phase/voltage monitor
  • Illuminated E-Stop push button
  • Soft starter for main motor
  • Overload protection for all motors
  • 24VDC power supply with circuit breaker protection
  • PLC flow and pressure control, safety monitoring, and control
  • Full load amps, voltage, and frequency: Frequency (Hz) Phase Voltage Amps 50 3 380 80A 60 3 460 67A


  • Dimensions:
    • Width: 48 in (122 cm)
    • Length: 65 in (165 cm)
    • Height: 67 in (170 cm)
  • Weight:
  • Casters: 5 x 2 in (127 x 51mm) polyurethane with swivel and locks
  • Cabinet material: 304 stainless steel
  • Clear panels: 3/8 in (9.5 mm) clear polycarbonate

The test stand has external controls, including an HMI panel, circuit breaker disconnect with a “lockout” feature, an illuminated mushroom-style E-Stop, a phase/voltage indicator, and an hour meter for testing and maintenance. The fluid level in the reservoir is easily maintained with the use of a sight gauge, and all external fluid connection points include manual shutoff valves. The operator interface uses a programmable logic controller (PLC) and an HMI panel to provide operator control of the hydraulic test stand.