Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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FOR MODELS: JGZ AND JGU SECTION 4 LUBRICATION Contact <strong>Ariel</strong> Technical Services for assistance. 3. Cooling water quality and treatment is to be maintained to prevent corrosion and mineral or other deposits. Cooling water must be treated with an appropriate anti-freeze, such as glycol, if subject to freezing. Coolant System Requirements The coolant flow is to be number of packing cases x 1 US gallon per minute, minimum for each inch of piston rod diameter (No. cases x 0.149 L/min for each mm of piston rod diameter). Based on using a treated 50/50% water/ glycol solution. Example: JGJ/2 with 1.5 inches (38.1 mm) diameter piston rod. 2 x 1 x 1.5 = 3 gallons per minute (2 x 0.149 x 38.1 = 11.3 L per minute). Packing Case The cooler should be sized for number of cases x 70 BTU/minute/inch of rod diameter (No. cases x 0.05 kW/mm of rod diameter). The pressure drop across the system is to be greater than 30 psi (2.1 bar). The coolant into the packing is not to exceed 130°F maximum (54°C max.). A lower coolant temperature will increase the amount of heat that can be transferred to the coolant. A lower coolant temperature is better in high pressure applications. Force Feed Lubrication System - Description The force feed lubrication system provides oil to the compressor cylinders and the piston rod packings. Oil is supplied to the 150 micron sintered bronze filter on the suction side of the force feed lubricator pump directly from the pressure side of the frame lube oil system, or from an overhead tank. Oil from the filter is supplied to a header and to the lubricator pumps on the lubricator box. The lubricator box has its own oil reservoir to lubricate the worm gear and cam. The reservoir is self-contained and is not fed by the lube oil system. A sight glass on the lubricator box will show the oil level in the lubicator reservoir. There are 1/4 inch tube fitting connections in the discharge lines near the force feed lubricator pumps through which the force feed lubrication system may be primed. Next in the discharge lines are blow-out fittings with rupture disks. If there is a blockage in the system, the pressure build-up will rupture the disks. Venting the system through the rupture disk causes the no-flow shutdown switch to close. The oil then travels to the distribution blocks. It is here that the lubricating oil is apportioned to provide the exact amounts to the cylinders and packings. The pistons in the intermediate sec- 7/09 PAGE 4 - 29 P1 F1 P1 Throttling/ Isolation Valves Cooler T1 P1 F1 P1 Coolant Circulating Pump FIGURE 4-10 PACKING COOLING SYSTEM - TYPICAL Packing Case P1 = Pressure Indicator T1 = Temperature Indicator F1 = Flow Indicator
FOR MODELS: JGZ AND JGU SECTION 4 LUBRICATION tions of the distribution block move back and forth in a continuous cycle, forcing lubricant successively through the several outlets as long as lubricant is supplied under pressure at the inlet. Each outlet has a check valve to prevent oil from backing up in the block. An indicator on the block shows the rate at which the block is cycling. From the distribution blocks, oil travels to the cylinders and packings. The system provides 1 inch min. (25 mm) of head at the guide and cylinder inlets to help ensure long check valve life. Some of the oil to the packing travels through to the cylinders, but the bulk of it is drained out through the pressure vent/drain fitting on the bottom of the crosshead guide and through the atmospheric drain also in the bottom of the guide. An oil level control valve, supplied by the packager and mounted on the skid, maintains proper level in the crankcase sump to replace oil used in cylinder lubrication. Force Feed Lubricator Adjustment See instructions under “Force Feed Lubricator Adjustment” in Technical Manual Section 3. NOTE: THE FORCE FEED SYSTEM MUST HAVE A BLOW-OUT FITTING WITH A PROP- ERLY RATED RUPTURE DISK, INSTALLED IN THE TUBING LINE BETWEEN THE FORCE FEED LUBRICATOR PUMP AND THE NO-FLOW SHUTDOWN. THE DISK COLOR SHOULD SHOW AT THE FITTING BLOW-OUT HOLE. THE FORCE FEED SYSTEM MUST HAVE A WORKING NO-FLOW SHUTDOWN SET TO ACTUATE WITHIN THREE TO FIVE MINUTES AFTER INTERRUPTION OF THE LUBRICATOR OIL FLOW. CAUTION!: USE A MIRROR TO VISUALLY INSPECT FOR PROPER RUPTURE DISK COLOR, IF THE FORCE FEED SYSTEM IS PRESSURIZED. A RUPTURING DISK OR HIGH PRESSURE OIL CAN POTENTIALLY CAUSE PERSONAL INJURY. PAGE 4 - 30 7/09
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Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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