Ariel JGM User manual

ARIEL
Heavy Duty
Balanced Opposed
Compressors
TECHNICAL MANUAL
For Models:
JGM, JGN, JGP and JGQ;
and JGI Vertical Non-Balanced
ARIEL CORPORATION
35 BLACKJACK ROAD, MOUNT VERNON, OHIO 43050
TELEPHONE: [phone] FAX: [phone]
VISIT OUR WEB SITE: www.arielcorp.com REV: 1/99

THIS PAGE LEFT INTENTIONALLY BLANK

WHEN THIS SYMBOL APPEARS ON THE COMPRESSOR OR CON-
TROL PANEL, THIS TECHNICAL MANUAL IS TO BE CONSULTED
FOR SPECIFIC INFORMATION BEFORE PROCEEDING. IF MORE
INFORMATION IS NEEDED CONTACT YOUR PACKAGER AND/OR
ARIEL CORPORATION.
CAUTION
GAS COMPRESSOR UNITS ARE COMPLICATED AND DANGEROUS PIECES OF
EQUIPMENT, IF YOU ARE NOT FULLY TRAINED AND FAMILIAR WITH THEIR
OPERATION.
BEFORE STARTING THIS UNIT:
FAMILIARIZE YOURSELF WITH THE UNIT.
READ AND STUDY START-UP AND SHUT-DOWN INFORMATION FOR BOTH
PACKAGE AND COMPRESSOR CAREFULLY!
A GAS/AIR MIXTURE UNDER PRESSURE CAN EXPLODE! YOU CAN BE SEVERELY
INJURED OR KILLED. MAKE SURE THE COMPRESSOR IS SUFFICIENTLY PURGED
OF ANY EXPLOSIVE MIXTURE BEFORE LOADING.
AFTER COMPLETING THE ABOVE, BEGIN PROPER STARTING PROCEDURE.
CAUTION
DO NOT ATTEMPT TO START-UP UNIT WITHOUT REFERRING TO THIS
MANUAL SECTION 1 -“START UP”. IT IS ALSO ESSENTIAL TO REFER
TO THE PACKAGER’S OPERATING MANUAL.
CAUTION
THIS MANUAL EDITION IS BASED ON THE CURRENT DESIGN AND
BUILD PRACTICES. THIS MANUAL MAY NOT BE APPLICABLE TO
EQUIPMENT BUILT PRIOR TO THE DATE ON FRONT COVER AND IS
SUBJECT TO CHANGE WITHOUT NOTICE. CONTACT ARIEL WITH ANY
QUESTIONS. REFER TO LAST PAGE OF THIS MANUAL FOR CONTACT
INFORMATION.
!
!
!

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FOR MODELS: JGI, JGM, JGN, JGP AND JGQ TABLE OFCONTENTS
9/08 i
TABLE OFCONTENTS
Design Specifications & Data ........................................................... 1-1
General ...................................................................................................................1-1
Specifications .........................................................................................................1-3
Opposed Throw - Reciprocating Weight Balancing ................................................ 1-5
Product Information and Safety Plates ...................................................................1-6
Important Safety & Data Information ................................................................. 1-7
Clearances ........................................................................................................... 1-10
Piston Ring and Packing Ring Side Clearance, Inches (mm) .........................1-11
Fastener Tightening Torque .................................................................................1-15
Tightening Torque Procedures ........................................................................ 1-19
Ariel Bolting .......................................................................................................... 1-21
Zone 1 Environment ............................................................................................. 1-21
Installation ........................................................................................... 2-1
The Skid or Package .........................................................................................2-1
Lifting the Compressor ......................................................................................2-1
Setting the Compressor ....................................................................................2-2
Leveling Limits for Compressors ....................................................................... 2-3
Aligning Main Bearing Bores .............................................................................2-3
Alignment - to Driver .........................................................................................2-6
Electrical Grounding ........................................................................................2-11
Pneumatically Actuated Unloaders & Clearance Devices ............................... 2-11
Vents and Drains ............................................................................................. 2-11
BICERA Type Crankcase Over-Pressure Relief Valves .................................2-12
Start Up ............................................................................................... 3-1
General ...................................................................................................................3-1
Start Up Check List .................................................................................................3-1
Warranty Notification - Installation List Data and Start Up Check Lists for
JG:A:M:N:P:Q:R:J:H:E:K:T:C:D Reciprocating Compressors ........................... 3-2
Maximum Allowable Working Pressure ................................................................ 3-10
Relief Valve Settings ............................................................................................ 3-11
Filling Sump & Priming a Main Oil Lube Oil System - Before Starting ................. 3-11
Filling The Sump ............................................................................................. 3-11
Priming - Main Lube Oil System ...................................................................... 3-12
Compressor Prelube ............................................................................................. 3-12
Force Feed Lubricator Adjustment ....................................................................... 3-12
Compressor Re-Application .................................................................................. 3-12
Lubrication ......................................................................................... 4-1
General ...................................................................................................................4-1
Lubrication Functions .............................................................................................4-1

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ TABLE OFCONTENTS
ii 9/08
Lubricant Characteristics ........................................................................................4-2
Viscosity ............................................................................................................4-2
Viscosity Index ...................................................................................................4-3
Pour Point ..........................................................................................................4-3
Flash Point .........................................................................................................4-3
Lubricant Base Stock ..............................................................................................4-3
Petroleum-Based Lubricants (also referred to as mineral oils) ..........................4-3
Synthetic Lubricants ..........................................................................................4-4
Lubricant Formulations ...........................................................................................4-5
Compounded Cylinder Oils ................................................................................4-5
R&O Oil .............................................................................................................4-5
Engine Oil ..........................................................................................................4-5
Used Engine Oil .................................................................................................4-6
Gear Oil .............................................................................................................4-6
FRAME OIL SYSTEM .............................................................................................4-7
COMPONENTS .................................................................................................4-7
Oil Strainer .........................................................................................................4-7
Oil Pump ............................................................................................................4-7
Oil Cooler ...........................................................................................................4-7
Oil Temperature Control Valve ..........................................................................4-8
Oil Filtration .......................................................................................................4-8
Compressor Prelube Pump ...............................................................................4-9
Oil Heaters .........................................................................................................4-9
Lube Oil Analysis Sampling Point ....................................................................4-10
Cold Starting ....................................................................................................4-11
Dry Sump .........................................................................................................4-12
FRAME OIL OPERATING CONDITIONS .............................................................4-13
Compressor Frame Lubricant ..........................................................................4-13
Oil Viscosity .....................................................................................................4-14
Oil Pressure .....................................................................................................4-14
Oil Temperature ...............................................................................................4-14
Oil Maintenance ...............................................................................................4-15
Oil Sampling ....................................................................................................4-15
Oil System Cleanliness .........................................................................................4-15
Cylinder and Packing Lubrication .........................................................................4-17
Independent Force Feed Lubricator Systems .................................................4-17
Common Oil Supply .........................................................................................4-17
Independent Oil Supply ...................................................................................4-18
Force Feed Lubrication System Components .......................................................4-18
Gas Inlet Debris Screens to Maintain Lube Performance ...............................4-18
Injection Oil Inlet Filter .....................................................................................4-19
Oil Dilution .......................................................................................................4-19
Cylinder Oil Lubrication Examples ...................................................................4-19
Under/Over Lube .............................................................................................4-19
Inadequate Lubrication Symptoms ..................................................................4-20
Lubrication Quantity - Paper Test Method .......................................................4-20
Lubricator Cycle Time ......................................................................................4-20
Cycle Time Indication ......................................................................................4-21
Force Feed Lubrication System Monitoring: ....................................................4-21

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ TABLE OFCONTENTS
9/08 iii
Minimum Requirements .................................................................................. 4-21
Devices ........................................................................................................... 4-21
Choosing a Lube System Monitor ...................................................................4-22
Break-in Rate .................................................................................................. 4-25
Liquids in Gas ................................................................................................. 4-25
Lube Type & Rate Recommendations ............................................................4-26
RATE CALCULATION NOTES ....................................................................... 4-28
Water-Cooled Packing .......................................................................................... 4-30
Coolant System Requirements ....................................................................... 4-31
Force Feed Lubrication System - Description ...................................................... 4-31
Force Feed Lubricator Adjustment .................................................................. 4-32
Blow-Out Fittings, Rupture Disks and Tubing .................................................4-32
Divider Valves ................................................................................................. 4-34
Description ......................................................................................................4-34
Divider Valve Block Assembly Instructions ...........................................................4-35
Operation - (see Figure 4-13 and Figure 4-14) ............................................... 4-35
Pressure Testing For Divider Valve By-Passing ............................................. 4-38
Electronic Lubricator Fluid-Flow Monitor/No-Flow Timer Switch - Proflo PF1 ...... 4-39
Proflo PF1 Monitor wiring identification and instructions for electronic indication: 4-40
Proflo PF1 Button Operation: .......................................................................... 4-41
Downloading Proflo PF1 Data: ........................................................................ 4-41
Proflo PF1 Setup Alarm Time and Mode: ....................................................... 4-42
Proflo PF1 Battery Replacement: .................................................................... 4-43
Proflo PF1 Display Errors: ............................................................................... 4-44
Proflo PF1 Operation Notes: ........................................................................... 4-45
Proflo Normally Open and Normally Closed Definition: .................................. 4-46
Proflo PF1 - Using Pulse Output and Alarm Circuit at Same Time: ................ 4-47
Proflo PF1 - Using PLC to Calculate Oil Consumption: ..................................4-48
Proflo PF1 Accessories Available: .................................................................. 4-49
Protection of Electronics & the Compressor When Arc Welding .......................... 4-49
Electronic-Lubricator Digital No-Flow Timer Switch (DNFT) ................................4-49
Replacing the (Field-Replaceable) Battery in the DNFT: ................................4-50
Oil Head at Lube Points ........................................................................................4-51
Force Feed Lubrication System and Running Conditions .................................... 4-51
Force Feed Lubrication System ...................................................................... 4-51
Running Conditions ......................................................................................... 4-52
System Design Considerations and Operating Parameters ............................ 4-52
Force Feed Balance Valves .................................................................................4-52
Setting and Maintaining Balance Valves ......................................................... 4-52
Checking/Adjusting Balance Valves on Subsequent Start-up ......................... 4-53
Frame Lubricating System - Description .............................................................. 4-54
Lube Oil Strainer, Filter & Filter Installation Instructions .......................................4-54
Lube Oil Strainer ............................................................................................. 4-54
Lube Oil Filter .................................................................................................. 4-55
Oil Filter Installation for Spin-On Type Filters .................................................4-55
Oil Filter Element Installation for Cartridge Type Filters ..................................4-55
Lube Oil Pump & Lube Oil Pressure ..................................................................... 4-57
Description & Adjustment ................................................................................ 4-57
Lube Oil Pressure Regulating Valve ............................................................... 4-57

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ TABLE OFCONTENTS
iv 9/08
Low Oil Pressure Shutdown ..................................................................................4-58
Maintenance ....................................................................................... 5-1
General Introduction ...............................................................................................5-1
Compressor Components ..................................................................................5-3
Positioning a Throw for Maintenance ......................................................................5-3
Connecting Rod ......................................................................................................5-4
Connecting Rod (Crank Pin) Bearing ................................................................5-4
Connecting Rod - Removal ...............................................................................5-6
Connecting Rod Bushing Replacement .............................................................5-7
Connecting Rod - Installation ............................................................................5-8
Crosshead............................................................................................................. 5-11
Crosshead - Removal ......................................................................................5-11
Crosshead - Installation ...................................................................................5-13
Crankshaft .............................................................................................................5-14
Main Bearings - Checking Clearances ............................................................5-14
Crankshaft - Removal ......................................................................................5-17
Oil Slinger - Removal .......................................................................................5-18
Oil Slinger - Installation ....................................................................................5-18
Chain Sprocket - Removal ...............................................................................5-18
Chain Sprocket - Installation ............................................................................5-19
Fan Shaft Assembly Procedure .......................................................................5-19
Main Bearings - Removal and Installation w/Crankshaft Removed .................5-20
Main Bearings - Removal and Installation w/Crankshaft In Place ...................5-21
Crankshaft - Installation ........................................................................................5-22
Chain Drive System ..............................................................................................5-23
Description .......................................................................................................5-23
Chain Adjustment ............................................................................................5-24
Chain and Sprocket Replacement ...................................................................5-24
Chain Idler Sprocket Replacement - (Eccentric Adjustment Cap) ...................5-25
Lube Oil Pump Chain Sprocket Replacement .................................................5-25
Force Feed Lubricator Chain Sprocket Replacement .....................................5-26
Piston and Rod .....................................................................................................5-27
Piston and Rod - Removal ...............................................................................5-27
Piston and Rod Disassembly ...........................................................................5-28
Piston and Rod Reassembly ...........................................................................5-29
Piston and Rod - Installation ............................................................................5-30
Piston Rod Run Out ..............................................................................................5-31
Piston Rings ..........................................................................................................5-32
Determining Ring Wear: ..................................................................................5-32
Removal: .........................................................................................................5-32
Piston Rings - Installation ................................................................................5-32
Wear Bands ..........................................................................................................5-32
Determining Wear Band Wear: ........................................................................5-33
Wear Band - Installation ..................................................................................5-33
Piston Rod Pressure Packing - Removal ..............................................................5-33
Piston Rod Packing - Reassembly ........................................................................5-34
Types of Piston Rod Packing Rings ......................................................................5-35

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ TABLE OFCONTENTS
9/08 v
Type "P" Pressure Breaker ............................................................................. 5-35
Type "BTR" Single Acting Seal Set ................................................................. 5-36
Type “AL” Double Acting Seal Set .................................................................. 5-36
Type "BD" Double Acting Seal Set .................................................................. 5-36
Type "3RWS" Oil Wiper Set ............................................................................ 5-37
Typical Arrangement of Piston Rod Packing Rings ..............................................5-37
Piston Rod Packing Ring Material ........................................................................ 5-37
Water-Cooled Piston Rod Packing ....................................................................... 5-38
Reassembly .................................................................................................... 5-38
Testing ............................................................................................................ 5-38
Valves ................................................................................................................... 5-39
Valves - Removal ............................................................................................ 5-39
Valves - Maintenance ...................................................................................... 5-40
Valves - Reassembly ...................................................................................... 5-41
Bolt Tightening for Valve Caps ............................................................................. 5-42
VVCP - Head-End Variable Volume Clearance Pocket ........................................ 5-43
VVCP - Removal ............................................................................................. 5-44
VVCP - Disassembly ....................................................................................... 5-44
VVCP - Maintenance ....................................................................................... 5-45
VVCP - Adjustment ......................................................................................... 5-45
Compressor Cylinder Re-Boring & Bore Restoration Guidelines .........................5-46
Ethylene Glycol Contamination ............................................................................ 5-47
Technical Assistance ........................................................................ 6-1
Recommended Maintenance Intervals ...................................................................6-1
Daily ..................................................................................................................6-1
Monthly (in addition to Daily Requirements) .....................................................6-2
Every 6 Months or 4000 Hours (plus Daily/Monthly) .........................................6-3
Yearly or 8000 Hours (plus Daily/Monthly/6 Months) ........................................6-3
Every 2 Years or 16,000 Hours (plus Daily/Monthly/6 Months/Yearly) ............. 6-4
Every 4 Years or 32,000 Hours (plus Daily/Monthly/6 Months/1 & 2 Years) ..... 6-4
Every 6 Years or 48,000 hours (plus Daily/Monthly/6 Months/1, 2 & 4 Years) .6-5
Trouble Shooting .................................................................................................... 6-5
Appendices ......................................................................................... 7-1
Ariel Tools ...............................................................................................................7-1
Ariel Furnished Tools ........................................................................................7-1
Ariel Tools - Purchased Separately From Authorized Dealer ...........................7-3
Minimum Hand & Commercial Tools Required ......................................................7-3
Gas Analysis Common Abbreviations ....................................................................7-7
Technical and Service Schools on Ariel Compressors ........................................... 7-7
Ariel Customer Technical Bulletins .........................................................................7-8
Vendor Literature ....................................................................................................7-8
Ariel Contact Information ........................................................................................ 7-8

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ TABLE OFCONTENTS
vi 9/08

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ
9/08 PAGE 1-1
SECTION 1 - DESIGN SPECIFICATIONS & DATA
General
Ariel compressors are designed for ease of operation and maintenance. Experience has
shown that an Ariel compressor will normally provide years of satisfactory performance with
minimal maintenance.
While Ariel compressors share many similarities, each model has aspects that are unique to
the particular type. If you as an operator are familiar with Ariel compressors, it is still impor-
tant to review this manual to determine the differences. If you are new to Ariel compressors
it is critical that you become very familiar with this manual prior to operating the compressor.
This manual is designed to provide information on installation, start up, operation and main-
tenance of a JGI, JGM, JGN, JGP or JGQ compressor. If you have any questions please
contact your Packager. If they are unable to provide resolution, they will refer your concerns
to Ariel Corporation. If you prefer, you may always contact Ariel directly. Contact your Pack-
ager or the Ariel Response Center for detailed information. Refer to the last page of this
manual for contact information.
This manual provides design specifications for standard current production equipment at
publication date. Do not exceed data plates ratings for a particular compressor.
The location of the throws and the information shown on the Data Plates is very important
when communicating questions concerning an Ariel compressor.
FIGURE 1-1 TYPICAL COMPRESSOR THROW NUMBERING AND FRAME DATA PLATE
LOCATION - JGM:N:N:Q/1 THROW (TOP VIEW)
Auxiliary End
Engine/Motor
Drive End
Throw #1
Frame Data Plate
JGM/1, JGN/1, JGP/1 & JGQ/1
Oil Filter
Breather
Lifting Eye
Bolts

FIGURE 1-2 TYPICAL COMPRESSOR THROW NUMBERING AND FRAME DATA PLATE
LOCATION - JGM:N:P:Q/2 THROW (TOP VIEW)
FIGURE 1-3 COMPRESSOR THROW NUMBERING AND FRAME DATA PLATE
LOCATION JGI/1 THROW - VERTICAL NON-BALANCED COMPRESSOR (SIDE VIEW)
FOR MODELS: JGI, JGM, JGN, JGP AND JGQ SECTION 1 - DESIGN SPECIFICATIONS & DATA
PAGE 1-2 9/08
Engine/Motor
Drive End
Throw #2
Throw #1
Frame Data/
Information Plate
Auxiliary EndJGM/2, JGN/2, JGP/2 & JGQ/2
Oil Filter
Breather
Lifting Eye
Bolts
Engine/Motor Drive
End (Reverse Rotation
from JGM:N:P:Q)
Throw #1
Lift Frame Here using Two
3/4”-10 Forged Steel Eye
Bolts Furnished By Ariel
Frame Data/Information Plate
is Located on Opposite Side
Caution Plates

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ SECTION 1 - DESIGN SPECIFICATIONS & DATA
9/08 PAGE 1-3
Specifications
TABLE 1-1 JGI, JGM & JGP FRAME SPECIFICATIONS
MODELa
a. For more information, refer to the Electronic Data, available in the Ariel Performance Program.
JGI/1 JGM/1 JGM/2 JGP/1 JGP/2
Stroke, in. (mm) 3-1/2 (89) 3-1/2 (89) 3-1/2 (89) 3 (76) 3 (76)
Maximum Allowable Speedb, RPM
b. Maximum allowable speed is the highest (potential) speed at which the compressor frame design
will permit continuous operation. Compressor frame data plate "Frame Rated Speed (RPM)" is
application specific, and may be lower than Maximum Allowable Speed. The lower of the Frame
Rated Speed, lowest cylinder rated (RPM) or driver rated speeds is not to be exceeded. If a JGI is to
be run at higher speeds, the skid must have adequate mass for the vertical forces.
800 1500 1500 1800 1800
Minimum Speedc, RPM
c. Minimum Speed is the minimum frame speed to provide adequate oil flow to the compressor bear-
ings.
400 750 750 900 900
Average Piston Speedd, FPM (m/s)
d. Average piston speed as is based on the maximum allowable speed (RPM) of the frame. The cylin-
der data-plate rated speed (RPM) or frame rated speed may be less, resulting in a lower piston
speed rating.
To 467
(2.37) To 875 (4.45) To 875 (4.45) To 900 (4.57) To 900 (4.57)
NumberofThrows 11212
Horsepower, to hp (kW) 55 (41) 84 (63) 168 (125) 85 (63) 170 (127)
Height - Bottom to Crankshaft Cen-
terline, in. (mm) 10.250 (260.35) 9.250 (234.95) 9.250 (234.95) 9.250 (234.95) 9.250 (234.95)
Connecting Rod Centerline To
Centerline, in. (mm) 8.250 (209.55) 8.250 (209.55) 8.250 (209.55) 8.250 (209.55) 8.250 (209.55)
Maximum Width with
Cylinders, in. (m) 26 (0.66) 62 (1.58) 83 (2.11) 62 (1.58) 83 (2.11)
Maximum Length, in. (m) 31 (0.79) 35 (0.89) 35 (0.89) 35 (0.89) 35 (0.89)
Overall Height, in. (m) 53 (1.35)
w/cylinder 17 (0.43) To Top of Aluminum Cover
Approximate Weight
with Cylinders, lb. (kg) 1300 (590) 1400 (640) 2000 (900) 1400 (640) 2000 (900)
Oil Pump Flow Ratee, GPM (L/s)
e. Flow rate is based on the maximum allowable frame speed rating and 180°F (82°C) oil.
4 (0.25) 4 (0.25) 4 (0.25) 5 (0.32) 5 (0.32)
Oil Heat Rejection, BTU/hr (kW) 5600 (1.6) 8400 (2.5) 8400 (2.5) 16,800 (4.9) 16,800 (4.9)
Sump Capacity, US gallons (L) 4 (15) 2.5 (9) 2.5 (9) 2.5 (9) 2.5 (9)
Piston Rod Diameter, in. (mm) 1.125 (28.58)
Internal Rod Load - Double Acting:
Compression + Tension, lbf(kN) 12,000 (53) 12,000 (53) 12,000 (53) 12,000 (53) 12,000 (53)
Tension, lbf(kN) 6000 (27) 6000 (27) 6000 (27) 6000 (27) 6000 (27)
Compression, lbf(kN) 7000 (31) 7000 (31) 7000 (31) 7000 (31) 7000 (31)
Internal Rod Load - Single Acting:
Tension, lbf(kN) 6000 (27) 6000 (27) 6000 (27) 6000 (27) 6000 (27)

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ SECTION 1 - DESIGN SPECIFICATIONS & DATA
PAGE 1-4 9/08
TABLE 1-2 JGN & JGQ FRAME SPECIFICATIONS
MODELa
a. For more information, refer to the Electronic Data, available in the Ariel Performance Program.
JGN/1 JGN/2 JGQ/1 JGQ/2
Stroke, in. (mm) 3-1/2 (89) 3-1/2 (89) 3 (76) 3 (76)
Maximum Allowable Speedb, RPM
b. Maximum allowable speed is the highest (potential) speed at which the compressor frame design will
permit continuous operation. Compressor frame data plate "Frame Rated Speed (RPM)" is applica-
tion specific, and may be lower than Maximum Allowable Speed. The lower of the Frame Rated
Speed, lowest cylinder rated (RPM) or driver rated speeds is not to be exceeded.
1500 1500 1800 1800
Minimum Speedc, RPM
c. Minimum Speed is the minimum frame speed to provide adequate oil flow to the compressor bear-
ings.
750 750 900 900
Average Piston Speedd, FPM (m/s)
d. Average piston speed as is based on the maximum allowable speed (RPM) of the frame. The cylinder
data-plate rated speed (RPM) or frame rated speed may be less, resulting in a lower piston speed rat-
ing.
To 875 (4.45) To 875 (4.45) To 900 (4.57) To 900 (4.57)
NumberofThrows 1212
Horsepower, to hp (kW) 126 (94) 252 (188) 140 (104) 280 (209)
Height - Bottom to Crankshaft Center-
line, in. (mm) 9.250 (234.95) 9.250 (234.95) 9.250 (234.95) 9.250 (234.95)
Connecting Rod Centerline To Center-
line, in. (mm) 8.250 (209.55) 8.250 (209.55) 8.250 (209.55) 8.250 (209.55)
Maximum Width with Cylinders, in.
(m) 62 (1.58) 83 (2.11) 62 (1.58) 83 (2.11)
Maximum Length, in. (m) 35 (0.89) 35 (0.89) 35 (0.89) 35 (0.89)
Overall Height, in. (m) 17 (0.43) To Top of Aluminum Cover
Approximate Weight with Cylinders, lb.
(kg) 1400 (640) 2000 (900) 1400 (640) 2000 (900)
Oil Pump Flow Ratee, GPM (L/s)
e. Flow rate is based on the maximum allowable frame speed rating and 180°F (82°C) oil.
4 (0.25) 4 (0.25) 5 (0.32) 5 (0.32)
Oil Heat Rejection, BTU/hr (kW) 8400 (2.5) 8400 (2.5) 16,800 (4.9) 16,800 (4.9)
Sump Capacity, US gallons (L) 2.5 (9) 2.5 (9) 2.5 (9) 2.5 (9)
Piston Rod Diameter, in. (mm) 1.125 (28.63)
Internal Rod Load - Double Acting:
Compression + Tension, lbf(kN) 18,000 (80) 18,000 (80) 20,000 (89) 20,000 (89)
Tension, lbf(kN) 9000 (40) 9000 (40) 10,000 (44) 10,000 (44)
Compression, lbf(kN) 10,000 (44) 10,000 (44) 11,000 (49) 11,000 (49)
Internal Rod Load - Single Acting:
Tension, lbf(kN) 9000 (40) 9000 (40) 10,000 (44) 10,000 (44)

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ SECTION 1 - DESIGN SPECIFICATIONS & DATA
9/08 PAGE 1-5
Opposed Throw - Reciprocating Weight Balancing
Ariel recommends that the reciprocating weight differential between opposing throws be
1.0 pound (0.45 kg) or less for JGM:N:P:Q compressors. JGI compressors are not balanced.
If replacing any major reciprocating component, that is; a connecting rod assembly, piston,
piston & rod assembly, crosshead-balance nuts or crosshead, weigh component parts on a
calibrated scale to 0.1 pounds (0.05 kg) and compare to the Compressor Balancing Record
sheet that comes in the parts manual with each compressor. If there are weight changes,
recalculate opposing throw reciprocating weight differentials. If not within the recommended
limit, new balance nuts and/or crossheads are to be selected to provide the least possible
differential.
If it is desirable to exchange opposing throw compressor cylinder locations, all reciprocating
components must be exchanged to the opposite throw, except the connecting rod
assemblies. Check the Balancing Record sheet and recalculate reciprocating weight
differential, with the connecting rod weights included. If not within the recommended limit,
new crosshead-balance nuts are to be selected to provide the least possible differential.
If opposing throws can not be balanced within the recommended reciprocating weight
differential limit, contact your packager and/or Ariel. When applying or re-applying a different
cylinder to a throw, the opposing throw reciprocating weight differential must be re-calculated
and new balance nuts or crossheads may be required. The force feed oil distribution system
may also need to be resized.
Contact your Packager or the Ariel Response Center for detailed information, if reciprocating
weights change and exceed the recommended reciprocating weight differential between
opposing throws, when exchanging opposing throw compressor cylinder locations or when
applying or re-applying a different cylinder to a throw. Refer to the last page of this manual for
contact information

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ SECTION 1 - DESIGN SPECIFICATIONS & DATA
PAGE 1-6 9/08
Product Information and Safety Plates
FIGURE 1-4 TOP COVER - TYPICAL JGM:N:P:Q
SEVERE PERSONAL INJURY AND PROPERTY DAMAGE WILL RESULT IF SUCTION AND DISCHARGE VALVES ARE NOT INSTALLED IN THEIR PROPER LOCATION.
CAUTION
A-0464
SEVERE PERSONAL INJURY AND PROPERTY DAMAGE CAN RESULT IF PRESSURE SYSTEM IS NOT COMPLETELY VENTED BEFORE LOOSENING THE BOLTS ON FLANGES, HEADS, VALVE CAPS, PACKING. CONSULT ARIEL TECHNICAL MANUAL BEFORE PERFORMING ANY MAINTENANCE.
CAUTION
A-0463
www.arielcorp.com
ROTATION
A-719
A-0713
FILTER INSTALLATION INSTRUCTIONS
(1) CHANGE FILTER EVERY 6 MONTHS - 4000 HRS OR 10 PSID (0.7 BARD) AT NORMAL OPERATING TEMPERATURE. (2) CLEAN FILTER BASE SURFACE - BE CERTAIN OLD GASKET IS REMOVED. (3) REPLACE ONLY WITH AN ARIEL OEM FILTER. (4) FILL FILTER WITH CLEAN OIL - SAME AS IN THE UNIT CRANKCASE. (5) APPLY CLEAN LUBE OIL TO FILTER GASKET. (6) TIGHTEN ONE TURN AFTER FILTER GASKET CONTACTS BASE. (7) AFTER STARTING UNIT, CHECK FOR LEAKS - RETIGHTEN IF NECESSARY.
ARIEL CORPORATION
ARIEL FRAME MODEL
FRAME SERIAL NUMBER
STROKE
*FRAME RATED SPEED (RPM)
MINIMUM SPEED (RPM)
MAXIMUM ROD LOAD TENSION
MAXIMUM ROD LOAD COMPRESSION
ARIEL SHIPPING DATE
NORMAL LUBE OIL PRESSURE
MAXIMUM LUBE OIL TEMPERATURE
LUBE OIL PRESSURE
SHUTDOWN SETTING
*MAXIMUM UNIT SPEED IS THE LOWER OF
FRAME OR CYLINDER RATED SPEED
CONSULT ARIEL TECHNICAL MANUAL BEFORE
OPERATING UNIT OR PERFORMING MAINTENANCE.
A-14766
ARIEL LOGO NAME PLATE AND ADDRESS
Aluminum Top
Cover Direction of Rotation Plate, Located
At The Drive End - Standard Rotation
Shown for JGM:N:P:Q
Manual Lifting
Handles
Breather
CAUTION!
Severe Personal Injury and Property Damage
will Result if Suction and Discharge Valves
are not Installed in their Proper Location.
CAUTION!
Severe Personal Injury and Property Damage
can Result if Pressure System is not
Completely Vented Before Loosening Bolts
on Flanges, Heads, Valve Caps. Consult Ariel
Technical Manual Before Performing any
Maintenance.
Filter Installation Instructions:
1. Change Filter every 6 Months - 4000 Hours o
r
10 psid (1.0 bard) at Normal Operating
Temperature.
2. Clean Filter Base Surface - Be Certain Old
Gasket is Removed.
3. Replace Only with an Ariel Original
Equipment Manufacturer Filter.
4. Fill Filter with Clean Oil - Same as in Unit
Crankcase.
5. Apply Clean Lube Oil to Filter Gasket.
6. Tighten One Turn After Filter Gasket
Contacts Base.
7. After Starting Unit, Check for Leaks -
Retighten if necessary.
Ariel Frame Model Number
Stroke of Piston
*Frame Rated Speed (RPM)
Minimum Speed (RPM)
Maximum Rod Load Tension
Maximum Rod Load Compression
Ariel Shipping Date, Month, Year
Normal Lube Oil Pressure
Maximum Lube Oil Temperature
Lube Oil Pressure Shutdown Setting
*Maximum Unit Speed is the Lower of
Frame or Cylinder Rated Speed
Consult Ariel Technical Manual Before
Operating Unit or Performing Maintenance
Frame Serial Number
FRAME DATA/INFORMATION PLATE:

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ SECTION 1 - DESIGN SPECIFICATIONS & DATA
9/08 PAGE 1-7
Important Safety & Data Information
CAUTION
SEVERE PERSONAL INJURY AND PROPERTY DAMAGE CAN
RESULT IF PRESSURE SYSTEM IS NOT COMPLETELY
VENTED BEFORE LOOSENING THE BOLTS ON FLANGES,
HEADS, VALVE CAPS, OR PACKING. CONSULT ARIEL
TECHNICAL MANUAL BEFORE PERFORMING ANY
MAINTENANCE.
CAUTION
SEVERE PERSONAL INJURY AND PROPERTY DAMAGE
WILL RESULT IF SUCTION AND DISCHARGE VALVES ARE
NOT INSTALLED IN THEIR PROPER LOCATION.
CAUTION
NOISE GENERATED BY RECIPROCATING MACHINERY CAN
BE A SOURCE FOR HEARING INJURY. SEE PACKAGER’S
INFORMATION FOR ANY SPECIFIC RECOMMENDATIONS.
WEAR HEARING PROTECTION WHEN UNIT IS RUNNING.
CAUTION
HOT (OR COLD) GAS TEMPERATURES ESPECIALLY THE
CYLINDER DISCHARGE AREAS, 190°F (88°C) OIL AND HIGH
FRICTION AREAS CAN BE A SOURCE FOR BURNS OR
FROST BITE. WEAR PROPER INSULATION WHEN WORKING
AROUND THESE AREAS. SHUT DOWN UNIT AND ALLOW TO
COOL (OR WARM) BEFORE DOING MAINTENANCE IN THESE
AREAS.
!
!
!
!

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ SECTION 1 - DESIGN SPECIFICATIONS & DATA
PAGE 1-8 9/08
The Force Feed Lubricator provides oil to the piston rod packing and the compressor pis-
tons. The Lubricator Data Plate provides cycle time values and directions for adjusting the
pump stroke to control the flow rate of the lube oil and the cycle time. If this plate is missing,
please contact Ariel Corporation, Mount Vernon, Ohio for a replacement and specific direc-
tions.
NOTE: THE FORCE FEED LUBRICATOR BOX CONTAINS APPROXIMATELY
1/3 GALLON (1L) OF LUBRICANT. LUBE BOX OIL IS FOR LUBRICATING THE
INTERNAL PARTS OF THE BOX, AND NOT A SOURCE OF OIL FOR THE
FORCE FEED LUBE SYSTEM.
FIGURE 1-1 HOT & COLD SURFACES - CAUTION SYMBOLS
FIGURE 1-5 FORCE FEED LUBRICATOR DATA PLATE - TYPICAL
“Hot Surfaces” “Cold Surfaces”
Where these CAUTION symbols appear on the compressor, the surfaces are hot or cold when compressor is
operating and can cause injury if touched without proper insulated protective clothing. If servicing the compressor,
allow these surfaces to cool or warm to safe temperatures or wear protective clothing before proceeding. When
applied to compressor cylinders, the temperature CAUTION applies to all connected piping and equipment.
DIST. BLK.
INCREASE
PUMP STROKE
A-3854
INDICATOR
PIN CYCLE TIME
BREAK-IN
NORMAL
SEC
SEC
DIST. BLK.
INCREASE
PUMP STROKE
A-3854
INDICATOR
PIN CYCLE TIME
BREAK-IN
NORMAL
SEC
SEC
Lubricator
Data Plate
Break-In (Cycle Time in) Seconds
Normal (Cycle Time in) Seconds)
Increase Pump Stroke (Turning
Plunger Stroke Adjustment
Screw Counter-Clockwise
Increases Lube Rate and
Reduces Cycle Time; Turning
Clockwise Reduces Lube Rate
and Increases Cycle Time)
Distribution Block (Part Number)
Indicator Pin Cycle Time
Top View
Lubricator Data Plate cycle time values (seconds) are at
maximum rated speed. At reduced speeds, the cycle time
will increase. See Section 4 for calculating increased cycle
times for reduced speeds. If pump stroke/cycle time was
properly adjusted at maximum rated speed, little or no
adjustment should be required at reduced speeds.

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ SECTION 1 - DESIGN SPECIFICATIONS & DATA
9/08 PAGE 1-9
If any plate is missing, please contact Ariel Corporation, Mount Vernon, Ohio for a replace-
ment and specific directions.
FIGURE 1-2 IDENTIFICATION PLATE LOCATIONS - COMPRESSOR DRIVE END VIEW
ARIEL CORPORATION
FULLY CLOSED A =
FULLY OPEN A =
VVCP S.N.
REMOVE ALUMINUM THREAD PROTECTOR WHERE APPLICABLE
A A
A-12927
A-6936
MECHANICAL INSPECTION
JOHN DOE
Variable Volume
Clearance Pocket
Serial Number
Fully Closed
Dimension A,
inches or cm
Fully Open
Dimension A,
inches or cm
Remove aluminum
thread protector
where applicable
VVCP Instruction Plate
VVCP S.N.
BASE VOL.
VVCP MAWP
A-0755
VARIABLE VOL.
TOTAL TRAV. TURNSOR
ARIEL CORPORATION
CYL. BORE
BORE
STROKE
PIST. END CL.
MIN. VOL. CL. (%)
CYLINDER SERIAL NO.
HE
HE
CE
CE
CLASS
RATED RPM
MAX. ALLOWABLE WORKING PRESS.
(MAX. RELIEF VALVE SETTING)
ARIEL CORPORATION
A-0465
Cylinder Identification/Data Plate
“Suction” Valve
Pocket Identification
Plate
“Discharge” Valve
Pocket Identification
Plate
Serial number, MAWP,
part number, work order
number, hydrostatic test
pressure, test date, and
tester’s personal stamp
are stamped on the end of
each cylinder.
Customer work order number and hydrotest pressure stamped near
VVCP plates on top of VVCP body.
Variable Volume
Clearance Pocket
Serial Number
Base Volume in cubic
in. or cubic cm (with
VVCP closed)
Nominal Cylinder
Bore diameter,
in. or mm
Variable Volume,
cubic in. or cubic
cm
Total Travel in. or cm, or
number of turns
VVCP Maximum Allowable
Working Pressure (maximum
relief valve setting), pounds
per square inch gauge or barg
VVCP - Variable Volume Clearance Pocket Data Plate
Nominal Bore
Diameter,
in. or mm
Stroke,
in. or
mm
Piston End
Clearance,
head end,
in. or mm
Cylinder
Serial
Number
Minimum
Volumetric
Clearance,
head end,
percentage
Maximum
Allowable
Working
Pressure
(maximum relie
f
valve setting),
pounds per
square inch
gauge or barg
Class Rated
Revolutions
Per Minute
Piston End
Clearance,
crank end,
in. or mm
Minimum
Volumetric
Clearance,
crank end,
percentage
Cylinder Identification Plates appear on each cylinder.
The serial number is also stamped on the end of each
cylinder.
NOTE: USE CYLINDER AND FRAME
SERIAL NUMBERS IN ALL
CORRESPONDENCE
SUCTION
A-0640-A
DISCHARGE
A-0640-B
Frame serial number is stamped on frame
machined surface (above Mechanical Inspector’s
Plate - this plate is not provided if compressor
was mechanically incomplete at factory testing)
on drive end, throw #2 side.

FOR MODELS: JGI, JGM, JGN, JGP AND JGQ SECTION 1 - DESIGN SPECIFICATIONS & DATA
PAGE 1-10 9/08
Clearances
TABLE 1-3 CLEARANCES
0.008 to 0.010 (0.20 to 0.25)
0.0035 to 0.0110 (0.089 to 0.279)
0.0090 to 0.0250 (0.229 to 0.635)
0.0005 to 0.0035 (0.013 to 0.089)
0.0015 to 0.0040 (0.038 to 0.102)
0.0070 to 0.0160 (0.178 to 0.406)
0.0090 to 0.0150 (0.229 to 0.381)
0.0014 to 0.0031 (0.036 to 0.079)
0.0014 to 0.0036 (0.036 to 0.091)
0.0015 to 0.0025 (0.038 to 0.064)
0.0015 to 0.0025 (0.038 to 0.064)
0.004 to 0.008 (0.10 to 0.20)
0.006 to 0.010 (0.15 to 0.25)
0.006 to 0.010 (0.15 to 0.25)
0.090 to 0.145 (2.29 to 3.68)
0.035 (0.89)
0.055 to 0.110 (1.40 to 2.79)
0.090 to 0.180 (2.29 to 4.57)
0.035 (0.89)
0.055 to 0.145 (1.40 to 3.68)
0.010 (0.25)
NOTE: MEASURED CLEARANCES WILL NOT NECESSARILY AGREE BECAUSE OF
OIL FILMS, ASSEMBLY TOLERANCES, WEAR, ETC. PLASTIGAGES, SOL-
DER, ETC. ARE NOT TO BE USED.
DESCRIPTION CLEARANCE
in. (mm)
Crankshaft Dust Seal (Feeler Gauge - Centered)a
a. Not applicable to JGI.
Crankshaft Thrust (End) JGM:N:P:Q
Crankshaft Thrust (End) JGI
Crankshaft Journal Bearing (Jack)1
Crankshaft Pin to Connecting Rod Bearing (Jack)1
Connecting Rod Thrust (Side) JGM:N:P:Q
Connecting Rod Thrust (Side) JGI
Connecting Rod Bushing to Crosshead Pin
Crosshead Bushing to Crosshead Pin - JGN:Q
Crosshead (Bronze) to Crosshead Pin
Crosshead (Gray Iron) to Crosshead Pin - JGI:M:P
Crosshead (Babbitted Ductile Iron) to Guide b- JGN:Q
b. Crosshead guide to crosshead clearance at the top (at side, top and bottom ends for JGI) is to be
checked by inserting a standard 0.500 inch (13 mm) wide feeler stock from one side edge of the cross-
head across to the opposite side. This is to be done at both ends. The bottom clearance is to be
checked with 0.0015 inch (0.038 mm) feeler stock at the 4 corners. If the feeler can be inserted more
than 0.500 inches (13 mm), the assembly is not acceptable.
Crosshead (Babbitted Bronze) to Guide 2
Crosshead (Gray Iron) to Guide 2- JGI:M:P
Total Piston End Clearance - Double Acting c
c. If total piston end clearance is not within table tolerance, crank end + head end as measured, contact
Packager or Ariel.
Piston End Clearance - Crank End (Double Acting)
Piston End Clearance - Head End (Double Acting)
Total Piston End Clearance - Tandem 3
Piston End Clearance - Crank End (Tandem)
Piston End Clearance - Head End (Tandem)
Fan Shaft Total Indicator reading (TIR) max.