Three -valve bypass line should be installed before the dryer air inlet valve and after the dryer air outlet valve. Consult your local authorized Bendix (28) on the upper mounting bracket saddle (27) and strap parts outlet or sales representative for additional (26). Can you bypass air dryer? This valve always permits the continued use of the plant compressed air system during any dryer maintenance or servicing operations. i carry a airline nipple to bypass my air dryer when it acts up untill i can get the replacement parts to fix it. changed air … Talk with an Atlas Copco specialist today about our range of refrigerant dryers and how you can use hot gas bypass to keep your system healthy. “bypass” the air accessory responsible for 2. We take a look at a truck air brake system and figure out why the air dryer purges every 30 seconds. The air dryer and reservoir system will remain in the charge cycle until the air brake system pressure builds to the governor cut-out setting of approximately 130 p.s.i. 1). The air pressure causes the air dryer purge valve to open. Small pinhole leaks that develop in compressed air pipelines allow moisture to enter and deteriorate the dew point. 27 Bypass Valve 28 Pressure Relief Valve Purge Silencer (Muffler) 29 Air Dryer Assembly ... Air dryer components are illustrated in Figure 1.5. PURGE CYCLE (Refer to Figure 3.) the air to by-pass most of the drying material, which reduces the dryer’s performance; Regenerative / Adsorption Drying Desiccant Air Dryer. Power and electrical connections 1. i also carry a spare govenor with me also. other air dryer manufacturer guidelines as needed. its better than paying labor on the road to get it changed. have a 2005 freightliner columbia. If the air pressure governor does not cycle properly between 90 and 120 psi, air pressure can build up until the safety valve opens. Tighten the 5/16" X 4-1/2" hex cap screw (25) and nut the high air usage. By ensuring your compressed air dryer utilizes hot gas bypass, you can prevent harmful over-cooling. air tanks slow to build. Power and electrical connections This bypass valve always be install to permit the continued use of the plant compressed air system during any dryer maintenance or servicing operations. Either condition allows moisture to bypass the dryer and pass downstream with the compressed air. Refer to Section 3 for instructions for removal of old parts and installation of new parts. AIR DRYER INSTRUCTION MANUAL 6 Typical Piping connection Three-valve bypass line should be installed before the dryer air inlet valve and after the dryer air outlet valve. never had an air governor do that to the air dryer but it is a cheap easy fix to replace one. When the temperature of the compressed air that enters the air dryer is within the normal range, the air dryer can remove most of the charging system oil. NOTE: For 1200 Plus Series air dryers, refer to Figure 7.1. It could also mean the bypass piping installed around a dryer has been left open, or the block valve in that pipe is leaking (Fig. when it arrived at shop, air dryer was bypassed & about 2 gallons of water in tanks. Desiccant dryers lower the dewpoint of compressed air by adsorbing water vapor onto the surface of a desiccant. When air brake system pressure reaches the cut-out setting