Heavy Duty Balanced Opposed Compressors - Ariel Corporation

13.11.2012 Views
FOR MODELS: JGZ AND JGU SECTION 4 LUBRICATION Oil Head at Lube Points The force feed system provides a minimum of 1-inch (25 mm) of oil head at lube points to extend check valve life. Where the 1-inch (25 mm) of head is not inherent, an oil trap fitting is provided, see the Figure. NOTE: PRESSURE IN FORCE FEED LUBE LINES IS, AS A MINIMUM, 110% OF THE CYLINDER SUCTION GAS PRESSURE. Force Feed Lubrication System and Running Conditions Force Feed Lubrication System 1 in. (25 mm) Head 1. Check sight glass on lubricator reservoir to make sure it is properly filled with oil. The oil in the reservoir is used to lubricate the worm gear and cam; it does not flow through the system. The reservoir also catches lube pump overflow. Oil is added only if it becomes necessary to raise the reservoir oil level. TABLE 4-3: FORCE FEED LUBRICATOR RESERVOIR OIL CAPACITY LUBRICATOR TYPE - ARIEL DESIGNS US GALLONS LITERS Single Pump 0.25 1 Dual Pump 0.5 1.75 Four Pump 0.8 3 To Check Valve To Lube Point FIGURE 4-11: OIL HEAD TRAP FITTING 2. The force feed system has been filled with mineral oil at the factory. If piping has been removed, or if the system has been drained, it can be filled and primed through a 1/8 inch plug on the discharge end of the lubricator pump. 3. Prime the force feed lubrication system just prior to starting the compressor using a proper priming pump; refer to “Ariel Tools - Purchased Separately” in Technical Manual Section 7. Use clean force feed lubricating oil of same type and grade as being used in service. Do not use any other type or grade of fluid for priming. 4. If the unit has just been overhauled, adjust the lubricator for maximum delivery. Reference Technical Manual Sections 3 and 5. Loosen the adjusting screw locknut. Turn the plunger stroke adjustment screw to the full up position. Tighten the adjusting screw locknut. Proper feed rate may be set after the machine is started. 5. When there are two or more pumps manifolded and feeding one distribution block, the best way to adjust them is equally. Start with pumps wide open, and adjust them together so that when the break-in cycle time is set, the pumps are stroking about the same. After break-in period, adjust the pumps in the same manner, provided that the final pump stroke is not too short. Try and keep the stroke greater than 20% of maximum; if set for less, the pump is not very reliable. If need be, one pump can be closed to stop its flow and the other pump(s) opened 7/09 PAGE 4 - 49

FOR MODELS: JGZ AND JGU SECTION 4 LUBRICATION to make the “normal” cycle time, to maintain a stroke greater than 20% in the functioning pump(s). Running Conditions When the machine is running, make sure that the oil level in the lubricator reservoir is at least one-half way up the sight level, but does not exceed two-thirds. See your packager's specific data to determine the normal operating conditions, the cylinder working pressures, and the rated speed. System Design Considerations and Operating Parameters To optimize force-feed lubrication system operation, Ariel uses the following general guidelines: 1. Maintain lube ratios within prescribed limits and cycle times as low as possible (normally 10 sec minimum) to provide each point with lubrication as frequently as possible. 2. Multiple pumps with manifolding are used to ensure that 150% of the normal lubrication rate can be provided during break-in. 3. Pumps are not allowed to operate below 20% of full stroke, the point at which they become unreliable. 4. In some applications, to optimize operation of the lubrication system, a single divider section is used to deliver lubrication to both a packing and a cylinder. 5. In some applications, cross-porting of divider valves is used to deliver the proper proportion of lubricant to a given point. Force Feed Balance Valves Balance Valves may be used in high differential-pressure distribution-block applications to reduce system problems such as bypassing, no-flow switch errors or blown rupture discs. The force feed balance valve is shown in the Figure. Setting and Maintaining Balance Valves Balance valves cannot be set prior to operating the unit. Ensure that all fittings are tight and any known leaks have been fixed. Purge the force feed lube system with a high-pressure hand pump, using the same injection oil that is used in service, to re- FIGURE 4-12: FORCE FEED BALANCE VALVE move any trapped air or gas in the system. See Technical Manual Section 7 for pump illustration and part number. DO NOT USE ANY OTHER FLUIDS FOR PURGING! Start up the compressor and bring up to normal operating pressure. After the operating pressures have stabilized, adjust the cap on the top of the balance valve if necessary. Loosen the PAGE 4 - 50 7/09

Page 1 and 2: ARIEL Heavy Duty Balanced Opposed C

Page 3 and 4: FOR MODELS: JGZ AND JGU TABLE OF CO



Page 9 and 10: FOR MODELS: JGZ AND JGU SECTION 1 -





























Page 67 and 68: FOR MODELS: JGZ AND JGU SECTION 4 L























Page 113: FOR MODELS: JGZ AND JGU SECTION 4 L
















































Page 211: FOR MODELS: JGZ AND JGU SECTION 7 -

with

page

section

compressor

piston

pressure

ariel

that

from

valve

heavy

duty

balanced

opposed

compressors

corporation

es.arielcorp.com

Heavy Duty Balanced Opposed Compressors - Ariel Corporation

Heavy Duty Balanced Opposed Compressors - Ariel Corporation ... View more Heavy Duty Balanced Opposed Compressors - Ariel Corporation

Delete template?

Save as template ?

Heavy Duty Balanced Opposed Compressors - Ariel Corporation Heavy Duty Balanced Opposed Compressors - Ariel Corporation