Operator's Manual High Pressure Breathing Air Compressors

10.3. FILTER MAINTENANCE
10.3.1. General instructions
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Operator’s Manual
-- Depressurize system before starting any maintenance work. The filter section can be vented manually at venting valve with
gauge. Wait untill the pressure on the gauge has dropped to zero, before opening pressure vessel.
-- Dry inside of filter housing with a clean cloth and check for corrosion before installing new cartridge. Replace any defective parts.
-- Lubricate threads and O--rings as well as threaded part of cartridge with white petrolatum (DAB 9) or Never--Seez White. Apply
sparingly.
-- Observe number of operating hours/no. of bottle fillings to ensure paying exact attention to the maintenace intervals.
-- Leave cartridge in the filter as long as unit is out of service, so that humidity entering the system is absorbed.
-- Change cartridge before reactivating a compressor unit which has been out of service for more than 6 months.
-- Keep all condensate drain valves and shut--off valves closed. Keep a minimum pressure of approx. 50 to 80 bar (700 to 1,100
psig) within the system to prevent moisture entering the compressor piping and filter system.
10.3.2. Oil and water separator maintenance
The sintered filter micro--cartridge requires periodic cleaning. See maintenance intervals.
Removal of sintered filter element (Fig. 29 ):
-- Remove tube connected to non--return valve (2).
-- Screw off filter head (3) and remove.
-- Unscrew micro--cartridge (1) from filter head (3).
-- Remove centre--screw (4) to remove filter elements.
-- Clean sintered filter elements using hot soapy water and blow dry with clean compressed air.
Condensate drain
The condensate produced by the re--cooling after the compression process has to be drained regularly by means of the condensate
drain valve
• before start--up of the compressor unit
• during operation every 15 minutes, at high humidity every
10 minutes.