Heavy Duty Balanced Opposed Compressors - Ariel Corporation
Heavy Duty Balanced Opposed Compressors - Ariel Corporation Heavy Duty Balanced Opposed Compressors - Ariel Corporation
Section 3 - Maintenance For Models: JGH:E:K:T • Electric motor driven compressors. • Unattended-start compressors, regardless of driver type. • All large frame compressor models (JGC:D:B:V:Z:U, KBB:V:Z:U). Automated compressor pre-lube systems must provide a minimum 10 psig (0.7 barg ) at the oil gallery inlet (after the filter) for a minimum of 30 seconds prior to starting, with minimum start-up oil viscosity and maximum allowable filter differential pressure. Ariel suggests a pre-lube pump sized at about 25% of frame oil pump capacity, (see Appendix C for frame oil pump flow rates or in the Ariel Performance Program). The purpose is to help ensure oil flow to all bearings, bushings, and oil-filled clearances prior to start-up. A start permissive is desirable to sense minimum required pressure/time at the oil gallery inlet. Automated systems shutdown the compressor if it fails to achieve 45 psig (3.1 barg ) oil pressure within 10 seconds after initial start-up (from when crankshaft starts to turn). If a compressor fails to start or shuts down at start-up due to low oil pressure, DO NOT re-start until the cause is corrected. Engine driven compressors with manual pre-lube pumps require adequate pre-lube prior to starting. If the compressor fails to achieve 45 psig (3.1 barg ) oil pressure within 10 seconds after reaching engine idle speed, shut it down and correct the cause. Repeat manual pre-lube prior to each cranking for start-up. When oil pressure exceeds 45 psig (3.1 barg ) at start-up, a low oil pressure shutdown set at 45 psig (3.1 barg ) activates. Oil Heaters The compressor may need a frame oil heater if it must start in cold weather. Method 1 maintains the compressor frame at a minimum temperature so the compressor can start immediately, if needed. Method 2 heats oil from ambient to a minimum temperature prior to starting (see Table 3-1). Application requirements determine heating method. Ariel recommends circulation heaters; do not use dipstick heaters. All Ariel compressors have at least one heater connection. Maximum allowable wattage per unit area for an immersion heater is 15 W/in2 (2.3 W/cm2 ). This limit prevents oil coking on the heater element, which reduces heater efficiency and contaminates oil. TABLE 3-1 Heat Needed to Maintain Minimum JGH:E:K:T Frame Temp. Method 1: Multiply by difference between oil and ambient temp. kW/°F (kW/°C) 0.0086 (0.0155) Method 2: Multiply by temperature rise divided by time (h) 0.0275 (0.0495) PAGE 3-10 3/11
For Models: JGH:E:K:T Section 3 - Maintenance Thermostatic control valve (3) configuration may vary from this schematic, depending on valve size. In mixing mode, B connection is lube oil from main oil pump with tee connection to lube oil cooler inlet, C is from lube oil cooler outlet, and A is to main oil filter. Valve connections A-B-C are marked on the valve. 1 2 A7 A9 A1 A3 A4 A8 Oil Connections (See Ariel outline drawing for details) A1 Packager connection from Oil Pump A2 Packager connection to Oil Filter A3 Oil connection from Compressor Crankcase (Oil Sump) A4 Lube Oil Compressor Inlet connection to Gallery Tube. Oil flows to the crankshaft main bearings, connecting rod bearings, crosshead pins, and crosshead bushings. A5 Pressure Regulating Valve return connection to Oil Sump (when applicable) A6 Filter Vent return connection to Oil Sump (when applicable on some models) A7 Oil tubing connections from Frame Gallery Tube to top and bottom of Crosshead Guides to lubricate Crossheads A8 Compressor Crankcase Oil Drain (Oil Sump Drain) A9 Pre-Lube/Recirculation/Heater connections (location and quantity depend on model) 10 Optional Heater Circuit A5 A6 4 9 8 FIGURE 3-3 Standard Wet Sump Frame Lube Oil Schematic 3/11 PAGE 3-11 7 A9 B A C 3 6 A2 8 F 5 Piping and components by Ariel Piping and components by Packager System Components 1. Y - Strainer 2. Compressor Driven Oil Pump (w/Safety Relief Valve for pressure regulation, or in models with a separate regulating valve (6), for relief) 3. Thermostatic Control Valve, 170°F (77°C) nominal rating - Required (purchase separately from Ariel) 4. Pre-Lube Oil Pump - Required (shown with oil heating circuit, when applicable) 5. Oil Filter 6. Pressure Regulating Valve with Overflow Return to Oil Sump (when applicable) 7. Oil Cooler - Required 8. Check Valve 9. 3-Way Valve, when applicable for heater circuit 10. Heater (when applicable)
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For Models: JGH:E:K:T Section 3 - Maintenance<br />
Thermostatic control<br />
valve (3) configuration<br />
may vary<br />
from this schematic,<br />
depending on<br />
valve size. In mixing<br />
mode, B connection<br />
is lube oil from<br />
main oil pump with<br />
tee connection to<br />
lube oil cooler inlet,<br />
C is from lube oil<br />
cooler outlet, and A<br />
is to main oil filter.<br />
Valve connections<br />
A-B-C are marked<br />
on the valve.<br />
1 2<br />
A7<br />
A9<br />
A1<br />
A3 A4 A8<br />
Oil Connections (See <strong>Ariel</strong> outline drawing for details)<br />
A1 Packager connection from Oil Pump<br />
A2 Packager connection to Oil Filter<br />
A3 Oil connection from Compressor Crankcase (Oil Sump)<br />
A4 Lube Oil Compressor Inlet connection to Gallery Tube. Oil<br />
flows to the crankshaft main bearings, connecting rod bearings,<br />
crosshead pins, and crosshead bushings.<br />
A5 Pressure Regulating Valve return connection to Oil Sump<br />
(when applicable)<br />
A6 Filter Vent return connection to Oil Sump (when applicable<br />
on some models)<br />
A7 Oil tubing connections from Frame Gallery Tube to top and<br />
bottom of Crosshead Guides to lubricate Crossheads<br />
A8 Compressor Crankcase Oil Drain (Oil Sump Drain)<br />
A9 Pre-Lube/Recirculation/Heater connections (location and<br />
quantity depend on model)<br />
10<br />
Optional<br />
Heater Circuit<br />
A5 A6<br />
4 9 8<br />
FIGURE 3-3 Standard Wet Sump Frame Lube Oil Schematic<br />
3/11 PAGE 3-11<br />
7<br />
A9<br />
B<br />
A<br />
C<br />
3<br />
6<br />
A2<br />
8<br />
F<br />
5<br />
Piping and<br />
components<br />
by <strong>Ariel</strong><br />
Piping and<br />
components<br />
by Packager<br />
System Components<br />
1. Y - Strainer<br />
2. Compressor Driven Oil Pump (w/Safety Relief Valve<br />
for pressure regulation, or in models with a separate<br />
regulating valve (6), for relief)<br />
3. Thermostatic Control Valve, 170°F (77°C) nominal<br />
rating - Required (purchase separately from <strong>Ariel</strong>)<br />
4. Pre-Lube Oil Pump - Required (shown with oil heating<br />
circuit, when applicable)<br />
5. Oil Filter<br />
6. Pressure Regulating Valve with Overflow Return to<br />
Oil Sump (when applicable)<br />
7. Oil Cooler - Required<br />
8. Check Valve<br />
9. 3-Way Valve, when applicable for heater circuit<br />
10. Heater (when applicable)
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