Heavy Duty Balanced Opposed Compressors

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FOR MODELS: JG AND JGA SECTION 4 - LUBRICATION AND VENTING Divider Valves FIGURE 4-4: DIVIDER VALVE; DISTRIBUTION BLOCK - TYPICAL NOTE: REFER TO THE PARTS BOOK FOR THE FRAME BEING SERVICED FOR ASSEMBLY DRAWINGS, PARTS LIST AND REPAIR KITS THAT ARE AVAIL- ABLE FOR DIVIDER VALVES. DIVIDER VALVES AND THEIR PISTONS ARE MATCHED SETS AND CAN NOT BE INTERCHANGED. IF A DIVIDER VALVE FAILS, REPLACE IT. DO NOT ATTEMPT REPAIR, EXCEPT FOR REPLACING O-RINGS. PAGE 4 - 14 11/01
FOR MODELS: JG AND JGA SECTION 4 - LUBRICATION AND VENTING Description Divider valves are comprised of three to eight valve blocks fastened to a segmented baseplate. O-rings are used to seal between the valve blocks and the baseplate and between the baseplate segments. These divider valves are used in a single line, progressive lubrication system and can be used for dispensing oil or grease. Valves and baseplate segments are normally supplied with Buna-N O-rings. Check valves are installed at the inlets of all lube points. Valve blocks containing metering pistons discharge a predetermined amount of lubricant with each cycle. Valve blocks can be single or twin and can be externally singled or crossported. Outlets not to be used when singling or crossporting must be plugged. A by-pass block can be used in any position on the baseplate. The use of a by-pass block allows the addition or deletion of lubrication points without disturbing existing tubing. Both outlets under a by-pass block must be plugged. The valve blocks and by-pass blocks are fastened to a baseplate mounted on the machine to be lubricated. The baseplate contains the divider valve's inlet and outlet connections, interrelated passageways and built-in check valves. All piping of lubricant to and from the divider valve is connected to the baseplate. The baseplate consists of one inlet block, three to eight intermediate blocks, one end block and three tie rods. Gasket plate seals are included with the baseplate segments. The valve block capacity of each baseplate is dependent upon the number of intermediate blocks in the baseplate. There must be a minimum of three working valves on each valve and baseplate assembly. Standard Electronic-Lubricator Digital No-Flow Timer Switch - DNFT The DNFT is a microprocessor-based switch used to sense no-flow or slow-flow conditions in the compressor cylinder lubrication system to facilitate alarm and/or shutdown. The DNFT also contains an amber light-emitting diode (LED) cycle indicator to provide a positive visual indication of system operation. The Ariel DNFT includes a proximity switch. The standard DNFT is factory set for (3) three minutes from no-flow to alarm/shutdown signal and is not adjustable. Optional programmable models are available. Introduced in September of 1996, the DNFT replaced the traditional mechanical no-flow switch and is standard on all new units. Since its introduction, the DNFT has undergone a series of design enhancements and several versions are in service. The current DNFT is shown in Figure 4-5: The DNFT works thru a magnetic pin which cycles back and forth as the divider valve piston moves, flashing the amber LED and indicating a complete cycle of the divider valve. The DNFT operates on a field-replaceable lithium battery. If battery voltage drops below normal operating levels, the DNFT goes into shutdown mode and compressor can not be re-started until battery is replaced. Replacing the (field-replaceable) battery in the DNFT: 1. Shut down the compressor 11/01 PAGE 4 - 15
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Heavy Duty Balanced Opposed Compressors

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