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568, 90 Duro Buna-N O-Ring Boss Gaskets For Straight Thread Fittings
SEAL INFORMATION MATERIAL 90 DUROMETER, BUNA-N RUBBER TEMPERATURE RANGE -40° TO +240°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (prefix) (Dash No.) (90 Duro Fluorocarbon) SEAL INFORMATION MATERIAL FLUOROCARBON TEMPERATURE RANGE -20° TO +400° F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (Prefix) - (Dash No.) - (90 Duro Fluorocarbon) -
SCS offers material advantages of with our family of urethanes in standard o-ring sizes. The high extrusion resistance and related compounds eliminates the need for a back-up in many hydraulic applications, thereby simplifying installation and reducing groove width. Our unmatched temperature rating makes it suitable in applications where other urethanes fail. In addition, Our O-rings provides superior water resistance and compression set resistance in water-based fluids. Premium urethane o-rings are much less prone to spiral failure and installation damage compared with rubber o-rings. Dimensions and tolerances of our o-rings match up with AS568B specifications for diameter and cross-section and are used in the same grooves. 90D = 90 Durometer B = Bulk (Min Quantities) V = Viton (Fluorocarbon) T = 55-58 Shore D PTFE U = 90A Urethane V-BLACK = Black Viton (Fluorocarbon) EP = Ethylene Propylene S = Silicone
SEAL INFORMATION MATERIAL BUNA-N RUBBER TEMPERATURE RANGE -40° TO +240°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (prefix) - (Dash No.) -
SCS offers material advantages of with our family of urethanes in standard o-ring sizes. The high extrusion resistance and related compounds eliminates the need for a back-up in many hydraulic applications, thereby simplifying installation and reducing groove width. Our unmatched temperature rating makes it suitable in applications where other urethanes fail. In addition, Our O-rings provides superior water resistance and compression set resistance in water-based fluids. Premium urethane o-rings are much less prone to spiral failure and installation damage compared with rubber o-rings. Dimensions and tolerances of our o-rings match up with AS568B specifications for diameter and cross-section and are used in the same grooves. 90D = 90 Durometer B = Bulk (Min Quantities) V = Viton (Fluorocarbon) T = 55-58 Shore D PTFE U = 90A Urethane V-BLACK = Black Viton (Fluorocarbon) EP = Ethylene Propylene S = Silicone
SEAL INFORMATION MATERIAL BUNA-N RUBBER TEMPERATURE RANGE -40° TO +240°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (prefix) - (Dash No.) -
SEAL INFORMATION MATERIAL BUNA-N RUBBER TEMPERATURE RANGE -40° TO +240°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (prefix) (Cord) - (Nom. Size) (Fluorocarbon) 568, 75 DURO FLUOROCARBON O-RING CORD
Cord is Black fluorocarbon. See O-Ring Kit section for Splicing Information.SEAL INFORMATION MATERIAL BLACK FLUOROCARBON TEMPERATURE RANGE -20° TO +400°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (Prefix) (Cord) - (Nom. Size.) (Fluorocarbon) -
Molded of 55D Durometer Hytrel, these back-up rings provide excellent extrusion resistance and tolerance to fluids such as phosphate esters, hydraulic oil and water. Stretched for installation, they return quickly to their original size for easy installation.
NOTE: Sizes (Dash No.) corresponds to standard O-ring numbersSEAL INFORMATION MATERIAL 55D HYTREL TEMPERATURE RANGE -65° TO +275°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (Prefix) - (Dash No.) -
Molded of 90A Durometer Buna-N Rubber, these 'Parback®' Style Dished Cross Section back-up rings provide excellent extrusion resistance. Stretched for installation, they return quickly to their original size for easy installation.
NOTE: Sizes (Dash No.) corresponds to standard O-ring numbers.SEAL INFORMATION MATERIAL 90A BUNA-N RUBBER TEMPERATURE RANGE -40° TO +240°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (Prefix) - (Dash No.) -
Letter suffix:
T = Solid, ST = Split, TS = Spiral Cut, TW = .085 WideSEAL INFORMATION MATERIAL PTFE TEMPERATURE RANGE -325 ° TO +500°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (Prefix) - (Dash No.)(Config)
CROSS SECTIONS 000 Series 1/16" C/S 100 Series 3/32" C/S 200 Series 1/8" C/S 300 Series 3/16" C/S 400 Series 1/4" C/S -
Molded of 95A Durometer Urethane these back-up rings provide excellent extrusion resistance. Stretched for installation, they return quickly to their original size for easy installation.
NOTE: Sizes (Dash No.) corresponds to standard o-ring numbers.SEAL INFORMATION MATERIAL 95A DUROMETER URETHANE TEMPERATURE RANGE -65 ° TO +220°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (Prefix) - (Dash No.) -
Used primarily as an anti-extusion device for u-seals, these back-up rings combine high performance with very low friction. 'ST' suffix designates a split ring.
SEAL INFORMATION MATERIAL PTFE TEMPERATURE RANGE -100° TO +500°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (prefix) - (Dash No.) (config.) -
Note: "SC" suffix designates a Scarf Cut wear ring.
SEAL INFORMATION TEMPERATURE RANGE -40° to +275° F TENSILE STRENGTH 27,000 PSI COMPRESSIVE STRENGTH 26,000 PSI PART NUMBER (PREFIX) - (OD) - (HT) CROSS-SECTIONS 606 Prefix 1/16" C/S 608 Prefix 5/64" C/S 609 Prefix 3/32" C/S 610 Prefix .1" C/S 612 Prefix 1/8" C/S 616 Prefix 3/16" C/S 625 Prefix 1/4" C/S -
Flexible Guide Bearings are strips of filled PTFE. The material can be cut to any length to fit any rod or bore size without losing its concentricity. The filler material is shown below. NOTE: Glass filled material has a thickness tolerance of ±_.010 in. Bronze filled tolerance is ± .0025 in.
SEAL INFORMATION MATERIAL GLASS FILLED 60% BRONZE FILLED PTFE TEMPERATURE RANGE -50° to +400° F TENSILE STRENGTH 2,100 PSI COMPRESSIVE STRENGTH 1,500 PSI SPEED 12 FT/SEC PART NUMBER (Prefix) - (Width) B = Bronze Filled PTFE -
Our 612F style flexible guide bearings, with a 1/8" radial thickness, offered in a boxed quantity. The strip can be cut to any length using anvil type pruning shears. Product length is 32' per box.
SEAL INFORMATION MATERIAL FABRICATED REINFORCED POLYESTER TEMPERATURE RANGE -40° to +250° F TENSILE STRENGTH 8,000 PSI COMPRESSIVE STRENGTH 24,000 PSI SPEED 3 FT/SEC PART NUMBER (Prefix) - (W) x (TH) -
Manufactured using woven fabric-reinforced polyester resin, this material produces a dimensionally accurate rectangular strip which can be cut to any length. Low coefficient of friction and high compressive strength makes it an ideal bearing material. A common radial thickness of 1/8 in. allows the stacking of various widths. Size reference is marked every 6 in. on the strip. Available by the foot or rolls of 16 feet. Cutting is made easy by using Anvil type pruning shears. Wall tolerance ± .002 in., radial wall thickness = 0.124 to 0.121 in. Standard part numbers are gray in color.
TQ = Turquoise in color.SEAL INFORMATION TEMPERATURE RANGE -40° to +250° F TENSILE STRENGTH 8,000 PSI COMPRESSIVE STRENGTH 24,000 PSI SPEED 3 FT/SEC PART NUMBER (Prefix) - (Width) -
Style 614 rod bearings are available in nylon material. These products are used extensively in hydraulic cylinders due to their low rate of wear and non-scoring properties. Excellent for those heavy duty applications that require a sturdy bearing. Most of these bearings are solid, although some may be split.
SEAL INFORMATION TEMPERATURE RANGE -40° to +275° F TENSILE STRENGTH 25,000 PSI COMPRESSIVE STRENGTH 26,000 PSI PART NUMBER (Prefix) - (ID) - (Width) -
To obtain best results from any style of piston cup, it is recommended that the piston properly support the heel of the cup. Recommended diametral clearance between the piston and cylinder wall are as follows:
1" to 2-1/4" .005"
2-1/2" to 4-3/4" .008"
5" to 10" .010"
The height of the machined shoulder most frequently used to control squeeze on the heel of the cup is as follows:
Cups 1/8" thick .116/.119"
Cups 5/32" thick .146/.149"
Cups 3/16" thick .178/.181"
The follower plate should be approximately .110" smaller than the ID of the cup. To reduce any tendency of the cup to extrude under pressure a phonograph finish may be machined on the surface of the follower plate.
NOTE: The 8000 piston cups are center punched.
SEAL INFORMATION MATERIAL 90A URETHANE TEMPERATURE RANGE -65° to +220° F PRESSURE RANGE 0 to 1,200 PSI SPEED 3 FT/SEC PART NUMBER (Piston Cup Type)(Bore) - (Hole Size) -
If your design is of medium to high pressure it is recommended that you utilize fabric reinforced rings. The following is a guide to pressure rating of multiple rings, including flat bottom rings.
SEAL INFORMATION MATERIAL FABRIC REINFORCED RUBBER
AND BUNA-NTEMPERATURE RANGE -40° TO +250° F PRESSURE RANGE SEE CHART BELOW SPEED 1.5 FT/SEC PART NUMBER (Prefix) - (ID) - (OD) A homogeneous ring may be also used for sealing at low pressure. Do not include the homogeneous ring in calculating pressure rating. Due to the different material, it is difficult to rate this type of ring. If you wish to use all homogeneous rings, tests should be conducted to verify design stability.
PRESSURE RATING OF MULTIPLE RINGS PRESSURE P.S.I. NUMBER OF RINGS 250 - 500 3 500 - 2,000 4 2,000 - 5,000 5 5,000 - 8,000 6 -
If your design is of medium to high pressure it is recommended that you utilize fabric reinforced rings. The following is a guide to pressure rating of multiple rings, including flat bottom rings.
SEAL INFORMATION MATERIAL FABRIC REINFORCED RUBBER
AND BUNA-NTEMPERATURE RANGE -40° TO +250° F PRESSURE RANGE SEE CHART BELOW SPEED 1.5 FT/SEC PART NUMBER (Prefix) - (ID) - (OD) A homogeneous ring may be also used for sealing at low pressure. Do not include the homogeneous ring in calculating pressure rating. Due to the different material, it is difficult to rate this type of ring. If you wish to use all homogeneous rings, tests should be conducted to verify design stability.
PRESSURE RATING OF MULTIPLE RINGS PRESSURE P.S.I. NUMBER OF RINGS 250 - 500 3 500 - 2,000 4 2,000 - 5,000 5 5,000 - 8,000 6 -
If your design is of medium to high pressure it is recommended that you utilize fabric reinforced rings. The following is a guide to pressure rating of multiple rings, including flat bottom rings.
SEAL INFORMATION MATERIAL FABRIC REINFORCED RUBBER
AND BUNA-NTEMPERATURE RANGE -40° TO +250° F PRESSURE RANGE SEE CHART BELOW SPEED 1.5 FT/SEC PART NUMBER (Prefix) - (ID) - (OD) A homogeneous ring may be also used for sealing at low pressure. Do not include the homogeneous ring in calculating pressure rating. Due to the different material, it is difficult to rate this type of ring. If you wish to use all homogeneous rings, tests should be conducted to verify design stability.
PRESSURE RATING OF MULTIPLE RINGS PRESSURE P.S.I. NUMBER OF RINGS 250 - 500 3 500 - 2,000 4 2,000 - 5,000 5 5,000 - 8,000 6 -
If your design is of medium to high pressure it is recommended that you utilize fabric reinforced rings. The following is a guide to pressure rating of multiple rings, including flat bottom rings.
SEAL INFORMATION MATERIAL FABRIC REINFORCED RUBBER
AND BUNA-NTEMPERATURE RANGE -40° TO +250° F PRESSURE RANGE SEE CHART BELOW SPEED 1.5 FT/SEC PART NUMBER (Prefix) - (ID) - (OD) A homogeneous ring may be also used for sealing at low pressure. Do not include the homogeneous ring in calculating pressure rating. Due to the different material, it is difficult to rate this type of ring. If you wish to use all homogeneous rings, tests should be conducted to verify design stability.
PRESSURE RATING OF MULTIPLE RINGS PRESSURE P.S.I. NUMBER OF RINGS 250 - 500 3 500 - 2,000 4 2,000 - 5,000 5 5,000 - 8,000 6 -
C = CARBOXILATED NITRILE
SEAL INFORMATION MATERIAL FABRIC REINFORCED RUBBER
AND BUNA-NTEMPERATURE RANGE -40° TO +250° F PRESSURE RANGE SEE CHART BELOW SPEED 1.5 FT/SEC PART NUMBER (Prefix) - (ID) - (OD) If your design is of medium to high pressure it is recommended that you utilize fabric reinforced rings. The following is a guide to pressure rating of multiple rings, including flat bottom rings.
PRESSURE RATING OF MULTIPLE RINGS PRESSURE P.S.I. NUMBER OF RINGS 250 - 500 3 500 - 2,000 4 2,000 - 5,000 5 5,000 - 8,000 6 A homogeneous ring may be also used for sealing at low pressure. Do not include the homogeneous ring in calculating pressure rating. Due to the different material, it is difficult to rate this type of ring. If you wish to use all homogeneous rings, tests should be conducted to verify design stability.
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Piston cups are constructed of rubberized fabric. Cups with no hole are center punched.
NOTE: If Product number ends in 'ED' the piston cups are specially sized for use in EDBRO Cylinders.SEAL INFORMATION MATERIAL COTTON FABRIC & RUBBER TEMPERATURE RANGE -35° to +220° F PRESSURE RANGE 0 to 2,500 PSI SPEED 1.5 FT/SEC PART NUMBER (Piston Cup Type)(Bore) - (Hole Size) -
Employed mainly in cylinders made by Cascade Corp., these vee sets are often over-sized or are different from standard vee sets. They are often used with Follower bearings.
SEAL INFORMATION MATERIAL FABRIC REINFORCED RUBBER AND URETHANE RINGS/NYLON ADAPTORS TEMPERATURE RANGE -35° to +220° F PRESSURE RANGE 0 to 10,000 PSI SPEED 1.5 FT/SEC PART NUMBER (Prefix) (ID) (CS) X (Height) -
INSTALLATION OF PTFE PISTON SEALS
Installing PTFE piston seals is not always an easy task. The use of installation tools (Designated by a 'CTC-' product code prefix) is recommended but often not convenient when working with a wide variety of sizes and applications. Finger installations are practical with rings of smaller cross-sections. Using fingers or a rounded plastic stick, knead the ring over the piston into the groove. With rings of larger cross-sections it may be necessary to heat the ring. Warming the ring in water or oil at 130° F or 140° F for about 5 minutes will soften the material for easier installation. Always avoid inconsistent stretching or overstretching of the PTFE seal.To prevent the PTFE ring from snapping into the wrong groove, cover wear ring grooves with plastic tape.
After seal installation, assembly of the cylinder may be difficult if the piston seal is loose on the piston or the cylinder has an inadequate leading edge chamfer. In such cases, compress the piston seal with belting or a suitable hose clamp. If the piston seal must pass threads or any other sharp edges during the cylinder assembly, cover the edges with plastic tape or wrap. Note: Caterpillar part number are used as a refernce only. We do not imply that these part are original equipment parts.
SEAL INFORMATION MATERIAL BUNA-N RUBBER SEAL
- HARD PLASTIC BACK-UPSTEMPERATURE RANGE -40° to +220° F PRESSURE RANGE 0 to 6,000 PSI -
A heavy duty double-acting assembly, the capped piston T-seal exhibits excellent sealability, extrusion resistance and wearability. T-seals with 'BR' suffix utilize a Bronze Filled PTFE cap instead of the standard Glass Filled PTFE cap.
INSTALLATION OF PTFE PISTON SEALS
Installing PTFE piston seals is not always an easy task. The use of installation tools (Designated by a 'CTC-' product code prefix) is recommended but often not convenient when working with a wide variety of sizes and applications. Finger installations are practical with rings of smaller cross-sections. Using fingers or a rounded plastic stick, knead the ring over the piston into the groove. With rings of larger cross-sections it may be necessary to heat the ring. Warming the ring in water or oil at 130° F or 140° F for about 5 minutes will soften the material for easier installation. Always avoid inconsistent stretching or overstretching of the PTFE seal.To prevent the PTFE ring from snapping into the wrong groove, cover wear ring grooves with plastic tape.
After seal installation, assembly of the cylinder may be difficult if the piston seal is loose on the piston or the cylinder has an inadequate leading edge chamfer. In such cases, compress the piston seal with belting or a suitable hose clamp. If the piston seal must pass threads or any other sharp edges during the cylinder assembly, cover the edges with plastic tape or wrap.
SEAL INFORMATION MATERIAL PTFE CAP
NYLON BACK-UP
RUBBER ENERGIZERTEMPERATURE RANGE -40° to +220° F PRESSURE RANGE 0 to 6,000 PSI SPEED 4.5 FT/SPEED> PART NUMBER (Prefix) - (Bore Size) -
Out of stockThese lip-type buffer seals are designed for replacement in Caterpillar® cylinders. The hinged-lip design reduces friction, heat, and wear under low-pressure conditions and acts as a check valve allowing back-pressure relief. Seals for rod sizes 2-1/8" and under do not have a back-up ring. Caterpillar Specific Buffer Seals - DYR Style
CATERPILLAR DYR SEAL INFORMATION MATERIAL URETHANE TEMPERATURE RANGE -22° TO +230° F PRESSURE RANGE 0 to 6,000 PSI SPEED 3 FT/SEC 12 FT/SEC -
One Piece Double Acting Piston Cups
This complete piston cup with a simple, one-piece construction serves the same purpose as a multi-assembly unit and is more economical with easy maintenance, dependability and long life. The unique piston cup consists of homogeneous rubber bonded to a zinc coated steel plate. The center hole may be enlarged to accommodate larger piston rods. Recommended for pneumatic and low-pressure hydraulic applications.SEAL INFORMATION MATERIAL RUBBER LIP, ZINC COATED STEEL PLATE TEMPERATURE RANGE -40° to +220° F PRESSURE RANGE 0 to 800 PSI SPEED 3 FT/SEC PART NUMBER (Prefix) - (Bore Size) -
Specifically designed as piston seals, these u-seals are engineered to seal on their outside diameter. They offer extended service life and maximum reliability in piston sealing.MAXIMUM EXTRUSION GAP PRESSURE / MAX. DIAM. GAP: | 1,000 PSI/.032 | | 3,000 PSI/.015 | | 5,000 PSI/.012 | | 6,000 PSI/.009 |