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Hersteller: Curtis Dateigröße: 2.36 mb Dateiname: Unterrichtssprache:

Take care to prevent dust from entering the crankcase Instruction Manual Oil-Less Compressors 3. INTERMEDIATE AND FINAL SEPARATOR 3.1. FUNCTIONAL DESCRIPTION OF INTERMEDIATE SEPARATOR (2-STAGE MODELS ONLY) The intermediate separator (Fig. 9) is mounted after the two first stages of the 2-stage oil-less compressor. The separator is designed to remove excess water which results from the cooling down after the compressing process and thus to provide the next stage with a cleaned medium. Separation is achieved by means of a baffle (4). A sintered metal filter (2) is provided additionally to remove dirt contamination. 3.1.1. CONDENSATE DRAIN The condensate has to be drained manually as soon as "max." mark is reached, or after each operation. Therefore open knurled nut mounted on the lower part of separator housing. After draining the condensate, firmly tighten knurled nut. Compressors which are equipped with a condensate drain valve are drained automatically. Ensure that the separators are drained every 15 minutes. At increased humidity, intervals for draining may be shorter. 3.1.2. INTERMEDIATE SEPARATOR MAINTENANCE Proper operation of individual stages will rely on the intermediate filter being properly serviced. The sintered filter element of the intermediate separator is to be cleaned approx. every 4,000 operating hours. - Remove condensate drain piping from filter. Unscrew union nut and remove filter cartridge. - Remove center screw (1), and separate sintered filter element (2). - To clean filter element, the best method is to use hot soapy water and to blow dry with compressed air. - On reinstallation of filter elements take care to observe correct order. Fig. 11: Intermediate -/final separator Instruction Manual Oil-Less Compressors 3.2. FUNCTIONAL DESCRIPTION OF FINAL SEPARATOR A final separator is mounted after the three first stages of the single-stage oil-less compressor and after the second stage of the 2-stage oil-less compressor. Separation is achieved by means of centrifugal action provided by a baffle (4). A sintered metal filter (2) is provided additionally to remove dirt contamination. 3.2.1. CONDENSATE DRAIN 1-stage compressor (option) The condensate has to be drained manually every 15 minutes during operation and after each operation. At increased humidity, intervals for draining may be shorter. Therefore open knurled nut mounted on lower part of separator housing. After draining the condensate, firmly tighten knurled nut. Compressors equipped with a condensate drain valve are drained automatically. Ensure that the filters are drained every 15 minutes. At increased humidity, intervals for draining may be shorter. 2-stage compressor (std.) The condensate has to be drained manually every 15 minutes during operation and after each operation. At increased humidity, intervals for draining may be shorter. Therefore open knurled nut mounted at the lower part of separator housing. After draining the condensate, firmly tighten knurled nut. Compressors which are equipped with a condensate drain valve are drained automatically. Ensure that the filters are drained every 15 minutes. At increased humidity, intervals for draining may be shorter. 3.2.2. FINAL SEPARATOR MAINTENANCE Maintenance process is the same as for intermediate separator, see chapter 3.1.2. Instruction Manual Oil-Less Compressors 4. VALVES 4.1. FUNCTIONAL DESCRIPTION OF 1st STAGE The valve head of the first stage forms the top part of the cylinder. The intake valve is fitted on the top of the piston. The pressure valve is mounted between valve head and cylinder. Note that the valves are operated by the flow of the air. On the suction stroke, the intake valves open and the air flows into the cylinders. At the start of the compression stroke the intake valve closes and the air opens the pressure valve, see Fig. 10. Fig. 12: Valve operation 1st stage 4.2. FUNCTIONAL DESCRIPTION OF 2nd STAGE The intake valve is fitted between valve head and cylinder. On the suction stroke, the intake valves open and the air flows into the cylinders. At the start of the compression stroke the intake valve closes and the air opens the pressure valve, see Fig. 11. Figure 13: Valve operation 2nd stage Instruction Manual Oil-Less Compressors 4.3. INITIAL OPERATIONAL CHECK OF VALVES If the intake pipe to the valve head of the second stage heats up excessively, and the first stage safety valve relieves, either the intake valve of the second stage or the pressure valve of the first stage is malfunctioning. It is therefore necessary to remove the valve head and to check and clean these valves, or to replace them as necessary. 4.4. GENERAL INSTRUCTIONS FOR CHANGING THE VALVES - Carefully clean dirty valves. Never use a sharp tool for this purpose. Soak the valves in hot soap suds and clean with soft brush. - Check individual components for excessive wear. If the valve seat and valve disks are dented, replace the valves. - Valve head screws must be tightened with a tor...

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