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Heavy Duty Balanced Opposed Compressors - Ariel Corporation

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FOR MODELS: JGZ AND JGU SECTION 4 LUBRICATION<br />

TABLE 4-8 EXAMPLE CYLINDER & PACKING DAILY LUBE RATE CALCULATION<br />

Water-Cooled Packing<br />

Water-cooled packing cases<br />

are required for compressor<br />

cylinders based<br />

upon the average piston<br />

speed and average cylinder<br />

pressure. Cooled packing<br />

cases are supplied to<br />

help remove heat generated<br />

as the piston rod/packing<br />

friction increases with<br />

the higher pressures and<br />

piston speed.<br />

Cooled packing cases are<br />

required for cylinders in accordance<br />

with Figure 4-8.<br />

Cylinder Bore<br />

US pints per day; ppd<br />

Packing Subtotal<br />

1 x 13.00 in. x 0.4 ppd/in. = 5.2 2 x 1.5 in. x 0.4 ppd/in. = 1.2 6.4<br />

1 x 9.75 in. x 0.4 ppd/in. = 3.9 2 x 1.5 in. x 0.4 ppd/in. = 1.2 5.1<br />

1.25 x 5.125 in. x 0.4 ppd/in. = 2.6 N/A 2.6<br />

1. All cylinders that have<br />

water-cooled packing as standard<br />

(see <strong>Ariel</strong> Performance Program)<br />

must be connected to a water cooling<br />

system, unless prior approval is obtained<br />

from <strong>Ariel</strong> Technical Services.<br />

2. If a separate lube supply is needed<br />

due to the gas analysis (H 2 S, CO 2 ,<br />

water saturation, air, etc.) an additional<br />

increase in viscosity may be<br />

needed if the cooling connection to a<br />

water cooled packing case is omitted.<br />

Recommended Total, ppd = 14.1<br />

Cylinder Bore<br />

(Liters per day; L/day)<br />

Packing Subtotal<br />

1 x 330 mm x 0.0074 L/day/mm = 2.4 2 x 38.1 mm x 0.0074 L/day/mm = 0.56 (3.0)<br />

1 x 248 mm x 0.0074 L/day/mm = 1.8 2 x 38.1 mm x 0.0074 L/day/mm = 0.56 (2.4)<br />

1.25 x 130 mm x 0.0074 L/day/mm = 1.2 N/A (1.2)<br />

Recommended Total, (L/day) = (6.6)<br />

Piston Speed, FPM<br />

1200<br />

1100<br />

1000<br />

900<br />

800<br />

700<br />

600<br />

REGION<br />

1<br />

Standard<br />

Packing &<br />

Lubrication<br />

Mean Pressure, bar = (Pd + Ps) ÷ 2<br />

69 138 207 276 345<br />

610<br />

REGION<br />

2<br />

REGION<br />

3<br />

Increased<br />

Viscosity<br />

Lubricant<br />

from<br />

Separate<br />

Supply<br />

OR<br />

Water-Cooled<br />

Packing<br />

Increased<br />

Viscosity<br />

Lubricant<br />

from Separate<br />

Supply<br />

AND<br />

Water-Cooled<br />

Packing<br />

500<br />

254<br />

0 1000 2000 3000 4000 5000<br />

Mean Pressure, psi = (Pd + Ps) ÷ 2<br />

FIGURE 4-8 COMPRESSOR PACKING APPLICATION GUIDE-<br />

LINES FOR PIPELINE QUALITY NATURAL GAS<br />

Coolant Flow<br />

REGION 4<br />

Cylinders are Not To Be<br />

Applied In This Region<br />

Without Prior <strong>Ariel</strong><br />

Approval.<br />

Coolant Out<br />

Coolant In<br />

Coolant<br />

Out<br />

PAGE 4 - 28 7/09<br />

559<br />

508<br />

457<br />

406<br />

356<br />

305<br />

FIGURE 4-9 WATER-COOLED PACKING CASE - TYPICAL<br />

Piston Speed, cm/s<br />

Coolant<br />

In

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