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R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
HERCULES® Stuffing Boxes The Hercules® Difference
Hercules stuffing boxes are recognized for superior quality and design unsurpassed in the industry. Hercules originated cone-style packing and it quickly became the industry standard. Now with the advent of DOME® packing, Hercules has introduced anew concept destined to become an even greater standard. Both cone and DOME® packing provide a tight seal without the excessive tightening
required for compression-type packing. Certain Hercules stuffing boxes have a unique misaligning feature that reduces the need for exact alignment with the pumping unit. The newer inverted cone and DOME® style packing automatically compensate for flow line pressures.
Today, Hercules continues to set standards for quality and dependability in the oil field with new packing designs, materials and the most extensive line of stuffing box models. No wonder production personnel think of Hercules first.
• Extensive Product Line.
• Patented Designs.
• Years of Proven Experience.
• NACE Options.
• Temperature Options to 540˚ F.
• Broad Selection of Packing Designs & Materials.
Unsurpassed Quality Features
• Full Selection of Accessories.
• Corrosion Resistant Materials & Coatings.
• Fail Safe Environmental Systems.
• Parts Interchangeability Between Many Models.
• Working Pressures to 3000 PSI.
• Superior Field Service & Training.
HERCULES® Classic Stuffing Boxes SB™, SBT™ & DPSB™
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
Regular Stuffing Box (SB™)• Original design.• Superior & dependable
performance.• Lub Upper Gland with grease zerk.• Optional Oil Reservoir Gland
(ORG™) and Anti-Pollution Adapter (APA™).
• Unique misaligning feature reduces need for exact alignment with the pumping unit.
Double Packed Stuffing Box (DPSB™)• Most widely-used stuffing
box in the industry.• Primary packing can be
changed under pressure by tightening compression bolts.
• Unique misaligning feature reduces need for exact alignment with the pumping unit.
• Adaptable to many accessories.• Lub Upper Gland with grease zerk.• Optional Oil Reservoir Gland (ORG™)
and Anti-Pollution Adapter (APA™).
Tee Base Stuffing Box (SBT™)• Combines SB™ and cross tee
with 1" bleeder.• Eliminates one threaded connection.• Results in a shorter hook-up.• Side outlets:
2" LP with 2" bottom connection.3" LP with 2-1/2" or 3" bottom connection.
• Lub Upper Gland with grease zerk.• Optional Oil Reservoir Gland (ORG™)
and Anti-Pollution Adapter (APA™).
SPECIFICATIONS SB™ SBT™ DPSB™
Working Pressure 1500 PSI 1500 PSI 1500 PSI
Bottom Thread 2", 2-1/2", 2", 2-1/2", 2", 2-1/2",(API Tubing or LP) 3", 4" 3" 3", 4"
Bottom Connection Male Female Male
Weight 2" 24 lbs. 33 lbs. 50 lbs.2-1/2" 25 lbs. 37 lbs. 51 lbs.3" 26 lbs. 42 lbs. 52 lbs. 4" 29 lbs. N/A 56 lbs.
Height 13-1/2" 16" 17"
Material Ductile Iron*
Split Cone PackingRod Sizes
Pieces Required:Top Cones 4 4 6Bottom Cones 1 1 1
* Corrosion-resistant coatings available, contact customer service.
Lub gland cap bolt
Lub gland cap
Split cone packing ring
Lub gland body with zerk
Upper gland bolts
Lower gland
Lower gland bolts
Split cone packing rings
Body
Compression bolt packingnut
Compression bolt packingring
Flange bolts
Compressionbolt
Compressionring
Split cone packing rings
O-ring
Base
DPSB™ Double Packed Stuffing Box
All Hercules® Classic Stuffing Boxes are available with eitherCone or DOME® packing. See pages 12-14.
1", 1-1/8", 1-1/4", 1-5/16",1-3/8", 1-7/16", 1-1/2", 1-3/4"
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
HERCULES® Inverted Cone Stuffing Boxes IVSB™, IVSBT™ & IVDPSB™
Regular Inverted Stuffing Box (IVSB™)• Lowest profile design.• Ideal for smaller pumping units.• Optional Oil Reservoir Gland (IV-ORG™) and
Anti-Pollution Adapter (APA™).
Double-Packed Inverted Stuffing Box (IVDPSB™)
• Exceptionally rugged, built for performance under tough conditions.
• Primary packing can be changed under pressure by tightening compression bolts.
• Lower profile than Classic model.• Optional Oil Reservoir Gland (IV-ORG™) and
Anti-Pollution Adapter (APA™).
Tee Base Inverted Stuffing Box (IVSBT™)• Combines IVSB and cross tee with 1" bleeder.• Eliminates one threaded connection.• Lower profile than Classic models.• Side outlets:
2" LP with 2" bottom connection.3" LP with 2-1/2" or 3" bottom connection.
• Optional Oil Reservoir Gland (IV-ORG™) and Anti- Pollution Adapter (APA™).
* Corrosion-resistant coatings available, contact customer service.
Hercules inverted cone stuffing boxes feature unique inverted cone packing that is pressure activated by well fluids, providing a superior seal without excessive tightening. The packing is very easy to adjust and results in a
more uniform and longer lasting seal.
All Hercules® Inverted Cone Stuffing Boxes are available witheither Cone or DOME® packing. See pages 12-14.
Patented Patented
Patented
SPECIFICATIONS IVSB™ IVSBT™ IVDPSB™
Working Pressure 1500 PSI 1500 PSI 1500 PSI
Bottom Thread 2", 2-1/2", 2", 2-1/2", 2", 2-1/2",(API Tubing or LP) 3", 4" 3" 3", 4"
Bottom Connection Male Female Male
Weight 2" 19 lbs. 28 lbs. 45 lbs.2-1/2" 20 lbs. 32 lbs. 46 lbs.3" 21 lbs. 38 lbs. 47 lbs. 4" 24 lbs. N/A 51 lbs.
Height 10" 12" 14"
Material Ductile Iron*Split Cone Packing
Rod Sizes
Pieces Required:Top Cones 3 3 5Bottom Cones 1 1 1
1", 1-1/8", 1-1/4", 1-5/16",1-3/8", 1-7/16", 1-1/2", 1-3/4"
HERCULES® High-Performance Stuffing Boxes Big Stuff™ & Big Stuff DPSB™
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
SPECIFICATIONS BIG STUFF™ BIG STUFF DPSB™
Working Pressure 1500 PSI 1500 PSI
NOTE: 1500 PSI cap is not interchangeable with 2500 PSI models
Bottom Thread (API Tubing or LP) 2", 2-1/2", 3", 4" 2", 2-1/2", 3", 4"
Bottom Connection Male Male
Weight2" 20 lbs. 45 lbs.2-1/2" 21 lbs. 45 lbs.3" 21 lbs. 46 lbs.4" 27 lbs. 49 lbs.
Height 9-3/4" 15"
Body & Cap Material Ductile Iron*
Split Cone PackingRod Sizes
Pieces Required:Top Cones 3 5Bottom Cones 1 1
* Corrosion-resistant coatings available, contact customer service.
Big Stuff DPSB™
• Easy to adjust threaded cap - no bolts to tighten.• Exceptionally rugged, built for performance under tough
conditions.• Primary packing can be changed under pressure by tightening
compression bolts.• Lower profile compared to Classic model.• Two 1/4" NPT ports (180˚ apart) for grease zerk &
pressure gauge.• Convenient protection of packing from weight of rod string.
Big Stuff™
• Easy to adjust threaded cap - no bolts to tighten.• Reduces costly packing maintenance time.• Packing compression forces are distributed evenly.• Low profile design.• Ideal for short stroke pumping units.• Convenient protection of packing from weight of rod string.
All Hercules® High Performance Stuffing Boxes are available with eitherCone or DOME® packing. See pages 12-14.
Patented
Polished Rod Cap
Body
Top Follower
Cone Packing
PackingAlignment
RingPatented
Polished Rod Cap
Body
Top Follower
Cone Packing
PackingAlignment
Ring
1", 1-1/8", 1-1/4", 1-5/16",1-3/8", 1-7/16", 1-1/2", 1-3/4"
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
HERCULES® High-Performance Stuffing Boxes NACE Big Stuff™ & Big Stuff DPSB™
* Corrosion-resistant coatings available, contact customer service.
NACE Big Stuff™
• Meets NACE MR-01-75.• High pressure service.• Easy to adjust threaded cap - no bolts to tighten.• Reduces costly packing maintenance time.• Packing compression forces are distributed evenly.• Low profile design.• Ideal for short stroke pumping units.• Convenient protection of packing from weight of rod string.
NACE Big Stuff DPSB™
• Meets NACE MR-01-75.• High pressure service.• Easy to adjust threaded cap - no bolts to tighten.• Exceptionally rugged, built for performance under tough conditions.• Primary packing can be changed under pressure by tightening
compression bolts.• Lower profile compared to Classic model.• Two 1/4" NPT ports (180˚ apart) for grease zerk & pressure gauge.• Convenient protection of packing from weight of rod string.
All Hercules® High Performance Stuffing Boxes are available with eitherCone or DOME® packing. See pages 12-14.
Patented Patented
SPECIFICATIONS BIG STUFF™ BIG STUFF DPSB™
Working Pressure 2500 PSI 2500 PSI
NOTE: 2500 PSI cap is not interchangeable with 1500 PSI models
Bottom Thread (API Tubing or LP) 2", 2-1/2", 3", 4" 2", 2-1/2", 3", 4"
Bottom Connection Male Male
Weight2" 23 lbs. 48 lbs.2-1/2" 24 lbs. 48 lbs.3" 24 lbs. 49 lbs.4" 30 lbs. 52 lbs.
Height 9-3/4" 15"
Body & Cap Material Ductile Iron*
Split Cone PackingRod Sizes
Pieces Required:Top Cones 3 5Bottom Cones 1 1
1", 1-1/8", 1-1/4", 1-5/16",1-3/8", 1-7/16", 1-1/2", 1-3/4"
HERCULES® Critical Service Stuffing Boxes PCSB™
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
Pollution Control Stuffing Box (PCSB™)• If polished rod breaks, flapper closes
automatically.• Two independently adjustable packing
chambers.• Pollution Control Adapter acceptable to -50˚ F.• Meets NACE MR-01-75.• Base has 1/2" NPT test port.• Adaptable to Anti-Pollution Adapter (APA™).• Packing can be changed under pressure.• Unique misaligning feature reduces need for
exact alignment with the pumping unit.• Flanged bottom connection available.
CHEVRON PACKING FOR PCSB IS NOT INTERCHANGEABLE WITH HTD CHEVRON PACKING.
SPECIFICATIONS PCSB™
Working Pressure 1500 PSI
Bottom Thread(API Tubing or LP) 2", 2-1/2", 3"
Bottom Connection Male or Flanged
Weight2" 102 lbs.2-1/2" 107 lbs.3" 112 lbs.
Height 24-1/2"
MaterialBase & Adapter Spool Low Temperature Steel
Flapper Stainless SteelBody & Packing Glands Ductile Iron*
Split Cone Packing Rod Sizes
Pieces Required:Top Cones 5Bottom Cones 1
Chevron Packing Rings:Packing O.D. 2-1/2"Stack Height 3"
* Corrosion-resistant coatings available, contact customer service.
Packing Gland Cap
PackingSupport
ChevronPacking
Upper PackingGland Body
Hex Bolts W/LockWashers
Pollution ControlAdapter Spool
FlapperWear Pad
Flapper Valve
Base
NPT Port
PackingSupport
Upper GlandBolts
Lower Gland
Lower GlandBolts
Primary Split Cone Packingor optional DOME® Packing
CompressionBolt
CompressionRing
Split Cone Packing
Hex Bolts W/Lock Washers
1", 1-1/8", 1-1/4", 1-5/16", 1-3/8", 1-7/16", 1-1/2", 1-3/4"
All Hercules® High Performance Stuffing Boxes are availablewith either Cone or DOME® packing. See pages 12-14.
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
HERCULES® Critical Service Stuffing Boxes HTD™
High Temperature Double-Packed Stuffing Box (HTD™)• Designed for high pressure & high temperature wells.• Meets NACE MR-01-75.• Dual packing chamber.• Primary packing can be changed under pressure.• Versatile chamber design accepts different types of packing,
including Chevron, standard crown ring compression, and Kevlar®/PTFE square braid rope packing.
SPECIFICATIONS HTD™
Working Pressure 3000 PSI
Bottom Thread (API Tubing or LP) 2", 2-1/2", 3", 4"
Bottom Connection Male
Weight2" 31 lbs. 2-1/2" 32 lbs. 3" 33 lbs.4" 35 lbs.
Height 14"
MaterialBody & Base Alloy Steel*Cap Ductile Iron*
Rod Sizes
Packing O.D. 2-1/4"Stack Height 2-1/2"
Packing Type Max. Temp.
Chevron NBR 250˚ F/121˚ CChevron HSN 325˚ F/163˚ CChevron FKM 400˚ F/204˚ CKevlar®/PTFE 540˚ F/282˚ C
Base
* Corrosion-resistant coatings available, contact customer service.
Cap
HTD Upper Split Bushing
Primary Packing
HTD Lower Split Bushing
Upper Body
Lock Nut
Packing
HTD Upper Split Bushing
O-Ring
HTD Upper Split Bushing
® Kevlar is a registered trademark of E.I. DuPont Corp.
HTD Chevron packing is not interchangeable with PCSBChevron packing. HTD uses 3 Upper Split Bushings and 1 Lower Split Bushing.
1", 1-1/8", 1-1/4", 1-5/16", 1-3/8", 1-7/16", 1-1/2", 1-3/4"
HERCULES® Stuffing Box Accessories Upper Glands
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
Lubricating Upper Gland (LUG™)• Standard on Classic models.• Zerk fitting for periodic greasing.• Top split cone wiper controls oil film on polished rod.• Extends packing life & reduces maintenance costs.• Rod sizes: 1", 1-1/8", 1-1/4", 1-5/16", 1-3/8", 1-7/16",
1-1/2", 1-3/4".• Material: ductile iron.
Standard Oil Reservoir Gland (ORG™)• Designed for use on “problem” wells that pump or flow off. • One quart reservoir capacity. • Adaptable to Anti-Pollution Adapter (APA™).• Top split cone wiper controls oil film on polished rod.• Modified version available for Hercules IVSB™, IVSBT™ &
IVDPSB™ models.• Optional for all Hercules Classic models.• Rod sizes: 1", 1-1/8", 1-1/4", 1-5/16", 1-3/8", 1-7/16",
1-1/2", 1-3/4".• Material: ductile iron.
High Performance Oil Reservoir Gland (HPORG™) • Provides polished rod lubrication and extends packing life.• Wicks reduce oil consumption.• Adaptable to Anti-Pollution Adapter (APA™).• Top split cone wiper controls oil film on polished rod.• Optional for all Hercules Classic models.• Modified version available for Hercules IVSB™, IVSBT™ &
IVDPSB™ models (IV-ORG™).• Rod sizes: 1", 1-1/8", 1-1/4", 1-5/16", 1-3/8", 1-7/16",
1-1/2", 1-3/4".• Material: ductile iron.
High Performance Lubricating Upper Gland (HPLUG™)• Provides a secondary seal for stuffing boxes.• Adaptable to Anti-Pollution Adapter (APA™).• Fits any Hercules Classic model.• Modified version available for Hercules IVSB™, IVSBT™ &
IVDPSB™ models.• Zerk fitting for periodic greasing.• Uses Chevron packing.• Rod sizes: 1", 1-1/8", 1-1/4", 1-5/16", 1-3/8", 1-7/16",
1-1/2", 1-3/4".• Body & cap: ductile iron.• Upper/Lower Packing Rings: MDS Nylon (Bronze-optional).
Standard top wiper cone
Felt wicks
Wick housing retaining ring
Wick housing (steel)
O-ring
Gland cap
Cap
Packing Support(MDS Nylon)
Chevron NBR PackingPacking Support(MDS Nylon)
Body
Bolts With Nuts & Washers
Patented
APA™ Port
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
HERCULES® Stuffing Boxes Accessories Pollution Control
Anti-Pollution Stuffing Box Adapter (APA™)• Leak detection system to prevent costly stuffing box spills.• Fits all ORG™, HPORG™, and HPLUG™ models.• Durable stainless steel container.• Meets NEC Class 1, Div. 1 (with explosion-proof switch).• Switch options:
- Standard- Explosion Proof (NEC Class 1, Div. 1)- Dual (first turns on warning beacon with partially full container,
second shuts unit down when container is full).
Pollution Control Adapter • Compatible with any Hercules DPSB™.• Can be retrofitted in the field.• Comprehensive spill protection from polished rod breaks.• Suitable for cold weather service (-50˚ F.)• Meets NACE MR-01-75.• 1/2" NPT test port.• Base options:
- 2" EUE Male- 2-1/2" EUE Male- 3" 8V LP Male- 3" EUE Male- 2-1/16" 2000 PSI API Flange- 2-9/16" 2000 PSI API Flange- 3-1/8" 2000 PSI API Flange- 2-9/16" 5000 PSI API Flange- Contact Customer Service for additional base options.
Suggested APA Switch Wiring Connections
Pumping Units With Pumping Units Electric Motors With Gas Engines
“NO” Contact “NO” Contact (Not Used) (To Magneto)
“Common” “Common” (To Starter Coil) (To Spark Plug)
“NC” Contact “NC” Contact (Connect Hot Lead) (Not Used)
Connect Common & “NC” (normally closed) contacts in series with starter coil of motor starter.If packing leaks, container will lower, open the“NC” contact & disconnect motor starter.
Connect Common & “NO” (normally open)contacts in parallel with magneto & spark plug.If packing leaks, container will lower, close the“NO” contact & ground the spark plug.
IMPORTANT NOTE: The potential for the presence of flammable materials in the atmosphere may create a hazardous location asdefined by the national electrical code (NFPA-70). Hazardous (classified) locations require the use of explosion proof equipment suitablefor the hazardous class, division and group.NOTE: On the explosion-proof switch, the red wire is the “NC” contact, blue is the “NO” contact, black is common and green is ground.
Hex Bolts W/Lock Washers
Pollution Control Adapter Spool
Flapper Valve Wear Pad
Flapper Valve
Base
Hex Bolts W/Lock Washers
HERCULES® Stuffing Box Packing DOME® Packing
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
DOME® Packing • Rod sizes: 1-1/8", 1-1/4", 1-5/16", 1-3/8", 1-1/2", 1-3/4".• Dramatically reduces stuffing box failures & maintenance costs.• Rubber packing with unique PTFE seal ring. • PTFE seal ring minimizes contact between rubber & polished rod.• Low coefficient of friction. • Less heat build-up. • Lower drag on polished rod. • Unique bowl shape converts vertical compression forces into radial
forces for a tight seal around polished rod.• Automatically compensates for changes in flow line pressure.• One-time conversion kit to retrofit most cone packed stuffing boxes.
Split bronze rings with retainer rings requiredwith DOME ® packing and Lub Upper Gland.
See Page 13 for ORG Conversion.
Note: Other materials available. Contact Customer Service.
A set of DOME ® packing consists of three pieces ofrubber packing, each of which has a split PTFE seal
ring sandwiched inside.
Material Max % H2S Max CO2 Max. Temperature
NBR 2% Not Recommended 250° F (121° C)
HSN 10% 20% 325° F (163° C)
TFEP (Aflas®) 35% 15% 450° F (232° C)
Ultra-Flex 152™ 10% 35% 325° F (163° C)
Conversion kit for DOME ® Packing and Lub Upper Gland. Also used for Big Stuff™
Stuffing Boxes.
® Aflas is a registered trademark of Aashi Glass Co. Ltd.
H2S & CO2 Conversion Chart
1,000 PPM 0.1%
2,000 PPM 0.2%
10,000 PPM 1.0%
20,000 PPM 2.0%
50,000 PPM 5.0%
100,000 PPM 10.0%
150,000 PPM 15.0%
200,000 PPM 20.0%
350,000 PPM 35.0%
PPM = Parts Per Million
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
HERCULES® Stuffing Box Packing DOME® Packing
NR - Not RecommendedSBR - Styrene Butadiene Rubber NBR - Nitrile Rubber XNBR - Carboxilated Nitrile RubberHSN - Highly Saturated Nitrile or Hydrogenated Nitrile EPDM - Ethylene Propylene® Aflas is a registered trademark of Aashi Glass Co. Ltd. ® Viton is a registered trademark of E.I. DuPont Co.
Name ASTM °F °C °F °CType
SBR 110 43 110 43 2% NR Poor Poor Good
Compound C™ NBR 300 149 250 121 2% 25% Good Good ExcellentCompound D™
Compound G™ XNBR 250 121 150 65 5% 20% Good Fair ExcellentCompound H™ EPDM 450 232 350 177 5% NR Poor Good FairCompound S™ SBR 160 71 160 71 2% 2% Poor Poor GoodCompound ST™
Nitrile NBR 250 121 150 65 2% 5% Fair Poor Good
HSN HNBR 325 163 300 149 10% 20% Good to Very ExcellentExcellent Good
Ultra-Flex 152™ HNBR 325 163 300 149 10% 35% Good to Very ExcellentExcellent Good
Viton® FKM 400 204 325 163 20% 5% Poor Fair PoorAflas® TFEP 450 232 350 177 35% 15% Fair Excellent Fair
Rubber Compound
Maximum Tolerances
for H2S
Maximum Tolerances
for CO2
Performance inSteam
Environments
Mechanical, Tear and Abrasive
Resistance
Maximum ServiceTemperature withConcentrations of
H2S & CO2Below 1%
Resistance toExplosive
Decompression in CO2
Concentrations up to 20%
Maximum ServiceTemperature withConcentrations of
H2S & CO2at Maximum
Tolerance Levels
SELECTION CRITERIA FOR RUBBER COMPOUNDS IN R&M ENERGY SYSTEMS STUFFING BOXES AND BOPS
Double Packed Stuffing Box(DPSB™) with Oil Reservoir Gland(ORG™) & DOME® Packing• Includes port for Anti Pollution
Adapter (APA™).• Includes DOME® packing, nitrile
gasket, small DOME® top split ring, and ORG adapter ring.
• Small split ring available in bronze or MDS nylon.
• “Hi-temp” gasket optional.• Can also be used with High
Performance Oil Reservoir Glands (HPORG™).
Oil Reservoir Gland (ORG™)Adapter with DOME® Packing
Hercules® DPSB™ with Oil ReservoirGland (ORG™) & DOME® Packing
Nitrile Gasket
ORG™ Adapter Ring
Small Split Ring
DOME® Packing
Large Split Ring
Soft™, Hard™, Special Lubricated™,
Heavy Duty™, PTFE Filled™
R&M Energy SystemsP.O. Box 2871
Borger, Texas, U.S.A. 79008-2871(800) 858-4158
(806) 274-5293 • Fax: (806) 274-3418
R&M Energy Systems Canada3703 - 98th Street
Edmonton, Alberta, Canada T6E 5N2(800) 661-5659
(780) 437-6316 • Fax: (780) 435-3074
HERCULES® Stuffing Box Packing Cone & Chevron Packing
The most important feature of stuffing box packing is long-lasting performance. R&M Energy Systems continually tests new andbetter materials to meet the demands for ever-changing well conditions. Extensive field tests make certain new packing
stands up to stringent durability and performance standards. Cone packing is available in sizes for all polished rods 1" through 1-3/4" in sets of 4 (3 top cone and 1 bottom cone) and 5 (4 top cone and 1 bottom cone).
Split Cone Packing
Soft Cone Packing™
For sweet crudes with high oil-to-water ratios and low sand content.
Hard Cone Packing™
For sweet crudes with low oil-to-water ratios.
Slick Pack® (Compound S™)For reducing polished rod noise (“squeaking”) in noise-sensitive locations on crudes with high oil-to-water ratios and low sand content.
Special Lubricated™
For sweet crudes and wells without constant flow.
Heavy-Duty™
For prolonged service on sweet crudes and wells without constant flow.
PTFE Filled™
For sweet crudes and wells with long stroke and fast pumping cycles.
Slick Pack® with Teflon® Flakes (Compound ST™)For reducing polished rod noise (“squeaking”)in noise-sensitive locations on sweet crudes that pump off or have long stroke and fast pumping cycles.
Compound C™
For steam injection wells producing sweet crudes.
Compound D™
For steam injection wells where polished rod scoring is a concern.
Compound H™
For steam injection wells.
Compound G™*For H2S and CO2 wells.
IMPORTANT NOTE: The guidelines on this page are for general reference purposes only andshould not be used as the sole determining factor for packing material selection.
Each downhole condition is different and must be addressed on a case-by-case basis to determine the best material solution for your particular well.
Chevron NBR PCSB™ & HTD™ 2% 250˚ F (121˚ C)
Chevron HSN PCSB™ & HTD™ 10% 325˚ F (163˚ C)
Chevron FKM PCSB™ & HTD™ 20% 400˚ F (204˚ C)
Kevlar®/PTFE HTD™ 20% 540˚ F (282˚ C)
Material Product Max Max % H2S Temperature
OTHER PACKING
Soft™ 2% 110˚ F (43˚ C)
Hard™ 2% 110˚ F (43˚ C)
Compound S™ 2% 160˚ F (71˚ C)
Special Lubricated™ 2% 110˚ F (43˚ C)
Heavy Duty™ 2% 110˚ F (43˚ C)
PTFE Filled™ 2% 110˚ F (43˚ C)
Compound ST™ 2% 160˚ F (71˚ C)
Compound C™ 2% 300˚ F (149˚ C)
Compound D™ 2% 300˚ F (149˚ C)
Compound H™ 5% 350˚ F (177˚ C)
Compound G™* 5% 250˚ F (120˚ C)
Material Max % H2S Max. Temperature
* Recommended for CO2 in concentrations up to 20%.
CONE PACKING
HTD™ Packing O.D. is 2-1/4" , PCSB™ HPLUG™ packing O.D. is 2-1/2"® Kevlar and Teflon are registered trademarks of E.I. DuPont Corp.
Chevron Packing
Rod sizes: 1", 1-1/8", 1-1/4", 1-5/16", 1-3/8",1-7/16", 1-1/2", 1-3/4"
PCSB AND HTD CHEVRON PACKING ARE NOT INTERCHANGEABLE.
Rod sizes: 1", 1-1/8", 1-1/4", 1-5/16", 1-3/8",1-7/16", 1-1/2", 1-3/4"