Hydraulic Test Equipment > Flushing Test Rig > Flushing Test Rig

The Flushing Test Rigs are designed to pressure test and proof pressure test the wing hydraulic system and hydraulic pipe work upon installation. These rigs are designed to handle the phosphate ester aerospace hydraulic fluids such as Hyjet and Skydrol Airbus specification NSA307110. The requirement is to flush all pipe work to a standard of NAS 1648 Class 7, which is achieved via a particle analyser. A PLC is fitted to facilitate the automatic control of the flushing and pressure testing system. It also records the results. The design and construction is fully compatible with phosphate ester type products such as Skydrol and Hyjet. The flushing rig has three channels so can flush, pressure test or proof pressure test three sections or part sections at the same time. For further information Click Here

The structure of the system consists of a stainless steel framework, which incorporates the 
hydraulic, and electrical systems necessary for carrying out the required flushing, pressure 
testing, fluid sampling and nitrogen purging of the wing flaps hydraulic pipe-work

Fully removable access panels allow for full access to the internals of the structure for 
maintenance purposes, from both sides of unit and above.Lockable-hinged doors also allow for 
ready access to hydraulic power unit, control manifolds and particle analyser for routine checks.
Ventilation panels in both top hinged doors ensure adequate airflow for cooling during normal 

The mobile structure is mounted on durable castors, which allow easeTest_Rif_electric_panels_web_
of movement, steering and locking brakes for safety. Multiple front and
rear handles mounted to the structure allow for ease of mobility using
two operators.

Suitable stowage at the rear of mobile structure is included to ensure
interconnecting hydraulic hoses are safely stored and protected from

A full size, low level, integral bunded drip-tray ensures minimal external
leakage of fluid and has the capacity to hold the full reservoir volume
should the need arise. The front of the mobile structure incorporates the
main electrical control pedestal with a sloped back panel above the 
electrical control pedestal for documentation storage during testing.

The hydraulic power unit consists of a reservoir that is mounted inside
the mobile structure above the integral drip-tray. The hydraulic power
unit can be accessed via either of the lower hinged doors.

The functions of the flushing rig tend to create waste energy in the form
of heat. Therefore it is necessary to remove this heat to prevent the fluid
over heating which would eventually lead to possible degradation of the
fluid and operational failure. The excess heat is removed via an air-blast
cooler that works in conjunction with the cooling pump-motor, the dual
thermostat and pressure filter.

The particle analyser is mounted in the top of the mobile structure in its
own protective stainless enclosure. It can be accessed via a top hinged
door. The unit is used to analyse the cleanliness level of the phosphate
ester aerospace hydraulic fluids such as Skydrol and Hyjet returning from
the wing flap hydraulic pipe work via the return manifold. The system's 20
sensors ensures sufficient back pressure is created to ensure fluid will pass
through the analyser when sampling. The particle analyser is controlled via
the electrical system where a record and printed output of cleanliness level
can be found.

The electrical system is used to fully control and monitor all aspects of the
mobile flushing rig.
Generally the electrical system consists of:

  • An electrical control pedestal mounted in the front of the mobile structure.
  • A HMI touch panel that allows the operator full control of all functions.
  • A printer to give hard copy of fluid cleanliness during testing.
  • All necessary hard wiring to electrical functions within the mobile flushing rig.
  • All electrical components are proofed against phosphate ester aerospace hydraulic fluids such as Skydrol and Hyjet