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Constructed of a rubber seal lip with a rubberized fabric heel, these seals feature a poly-acetal bearing ring or a poly-acetal anti-extrusion ring. These seals offer excellent sealing ability and high pressure capability. Commonly are used with the SR retention rings. -
Style HSU u-seals are precision molded from 90 Dureometer Buna-N rubber or 90 A Fluorocarbon (suffix 'V') - 90 Duro Rubber for abrasion resistance and Fluorocarbon for heat resistance. These seals are commonly found in industrial cylinders, as piston, rod and cushion seals. -
Caterpillar - 1 Piece Rod Buffer SealSEAL INFORMATION MATERIAL 92A URETHANE TEMPERATURE RANGE -40° TO +200° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC 12FT/SEC -
BRONZE FILLED PTFE ROD BUFFER SEALSEAL INFORMATION MATERIAL BRONZE FILLED PTFE SEAL
RUBBER ENERGIZERTEMPERATURE RANGE -40° TO +220° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC 12FT/SEC -
Out of stock
These 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 StyleCATERPILLAR 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 -
U-cup style buffer ring offers an asymmetric sealing lip profile, chamfered sealing edges, and pressure relieving capabilities to prevent inner pressure entrapment when employed in a tandem sealing system. This rod buffer seal is designed to absorb impact pressure fluctuations under high-load conditions thus increasing the life of the primary seal.SEAL INFORMATION MATERIAL URETHANE U-STYLE, POLYACETAL BACK-UP TEMPERATURE RANGE -40° to +230° F PRESSURE RANGE 0 to 8,000 PSI SPEED 3 FT/SEC PART NUMBER (Prefix)(CS) - (Inside Dia) - (O-Ring CS) / (Prefix)(CS) - (Inside Dia) - (Nom. Seal Height) -
PTFE Vee RingsSEAL INFORMATION MATERIAL PTFE TEMPERATURE RANGE -100° to +400° F PRESSURE RANGE 0 to 5,000 PSI SPEED 12 FT/SEC PART NUMBER (Prefix) - (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 -
C = CARBOXILATED NITRILESEAL 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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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 -
The PA Unitized Pistons are designed to handle a broad range of application parameters. The piston body is machined to exact dimensions and is constructed using four components: A high strength steel body, a non-metallic bearing, a rubber loading ring and a filled PTFE seal ring. The non-metallic bearing is molded to the piston using a special proprietary process.
SEAL INFORMATION TEMPERATURE RANGE -40° to +275° F MAX PRESSURE 5,000 PSI MAX VELOCITY 3 ft / second MATERIAL STEEL, NYLON, NBR, PTFE PART NUMBER (PREFIX) - (OD) X (ID) X (HT) -
These specifically sized seals are for certain OEM cylinders (primarily Heil & Timberjack). Their use is intended for existing housings where the old seals are dimensionally comparable to the table below. Please call your sales representative if you need additional assistance.
SEAL INFORMATION MATERIAL GLASS FILLED PTFE SEAL RUBBER ENERGIZER TEMPERATURE RANGE -40° to +220° F PRESSURE RANGE 0 to 5,000 PSI SPEED 12 FT/SEC PART NUMBER (Piston Seal)(Type of Seal) - (Size) -
These piston seals provide bi-directional, low friction sealing with increased stability and superior leakage control. The square cut energizer provides low pressure sealing and eliminates backside leakage. This seal also effectively seals between different fluids on each side of the piston seal, making gas/liquid sealing combinations possible.
SEAL INFORMATION MATERIAL 40% BRONZE FILLED PTFE SEAL, RUBBER ENERGIZER TEMPERATURE RANGE -40° to +220° F PRESSURE RANGE 0 to 5,000 PSI SPEED 12 FT/SEC SPEED 12 FT/SEC PART NUMBER (Piston Seal)(Type of Seal) - (Size) -
Designed to fit on one or two piece pistons, this piston seal employs a nitrile seal for high sealability, nylon split back-ups for extrusion resistance, and two split bearing rings. No further support bearings required.
SEAL INFORMATION MATERIAL 90A NITRILE SEAL
NYLON BACK-UP
NYLON BEARINGTEMPERATURE RANGE -22° to +212° F PRESSURE RANGE 0 to 6,000 PSI MAXIMUM SPEED 1.5 Ft/Sec. PART NUMBER (Prefix) - (Size)
