1. Introduction
The CFM56 Compressor Washing Package consists of two stainless steel pressure vessels, each having a capacity of 34 litres (7.5 gal). Each vessel is equipped with a sight glass indicating the level of fluid, a filler cap, gauze strainer, pressure relief valve, nitrogen inlet valve, fluid outlet valve, pressure gauge and drain plug.

The maximum working pressure of each vessel is 5.44bar (80psi). The vessels are mounted in tandem within a welded, tubular steel frame which forms a transportation trolley. Two pneumatic tyred wheels run on a solid axle which is welded to the frame. Two rubber feet support the front of the trolley and these act as a brake when the rig is stationary. The fluid in the pressure vessels is pressurised by a nitrogen cylinder, which is mounted in the upright position in front of the pressure vessels. The nitrogen supply to the pressure vessels is controlled by a regulator. The reduced pressure is distributed to the top of each vessel via a ‘Y’ piece connector. A non-return valve, fitted prior to the nitrogen inlet valve on each vessel, prevents fluid entering the nitrogen supply lines should the rig be tilted rearwards during operation. When the vessels are pressurised, fluid is forced up an outlet stack pipe to an outlet ball valve. During pressurization and during the washing process, the nitrogen bubbles through the fluid creating agitation. This is particularly useful if the solution being used requires extra mixing. The washing solution is
contained in one pressure vessel, and the other vessel is intended for the rinsing fluid. A 15 ft long, 1⁄2” nominal bore fluid delivery hose terminates in a 1⁄2” BSP union nut. The washing solution is delivered to the engine via two stainless
steel probes which are stowed in holsters attached to the handles of the rig. Each probe has been calibrated to give a flow of 4 L/min when the operating pressure is set at 3.5bar (50psi), i.e. over two minutes the two probes will deliver 16 litres.

2. Rig preparation for wash
Ensure nitrogen cylinder is fully charged to maximum of 172.4bar (2500psi) and high pressure regulator valve is
turned fully anti-clockwise. Ensure inlet and outlet ball valves are in the closed position (across the direction of flow).
Fill respective vessels with recommended fluids (eg: vessel No.2 with demineralised water, vessel No.1 with demineralized water and Turboclean 2 detergent at a ratio of 4:1). Close and tighten filler caps.

3. Rig operation
Rotate the nitrogen cylinder valve hand wheel anti-clockwise to turn on the nitrogen supply.
Open relevant vessel nitrogen inlet ball valve (in line of direction of flow).
Rotate high pressure regulator valve clockwise until desired pressure is reached.
Open relevant vessel outlet ball valve for desired wash period. On completion of wash period, close relevant vessel outlet ball valve and nitrogen inlet ball valve. Repeat operations 2 to 5 for rinsing cycle using relevant vessel
and valves.  

Leading particulars