NOTE: Caterpillar part numbers are used as a reference only. We do not imply that these parts are original equipment parts.
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Nylon Step Cut
NOTE: Piston diameter 'I' dimensions are given for pistons without wear rings.SEAL INFORMATION MATERIAL GLASS FILLED NYLON SEAL RUBBER ENERGIZER TEMPERATURE RANGE -40° to +220° F PRESSURE RANGE 0 to 6,000 PSI SPEED 3 FT/SEC PART NUMBER (Piston Seal)(Type of Seal) - (Size) - (Groove Width) -
835 Homogeneous Rubber Vee RingsSEAL INFORMATION MATERIAL 70 DURO BUNA-N TEMPERATURE RANGE -40° to +220° F PRESSURE RANGE 0 to 1,250 PSI SPEED 3 FT/SEC PART NUMBER (Prefix) - (Size) -
Used as a companion to our 'B' lip configured, Style 850 U-Seal. Style 855 PRC rings convert a uni-directional u-seal into a bi-directional seal. NOTE: Height dimension is the increase in groove width required.- MATERIAL 95A URETHANE
- TEMPERATURE RANGE -40° to +200° F
- PRESSURE RANGE 0 to 5,000 PSI
- SPEED 3 FT/SEC
- PART NUMBER (Prefix)(CS) - (Inside Diameter)
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Molded in polyurethane, these rotary pressure seals are specifically designed for use sin hydraulic swivel joints.
SEAL INFORMATION MATERIAL 92A URETHANE TEMPERATURE RANGE -50° to +220° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC PART NUMBER (Prefix) - (ID) x (OD) x (H) -
Our premium single-acting polyurethane rod seal incorporates an NBR energizer to seal at low pressures. The twin lip design provides stability and friction-reducing lube retention for dry rod sealing, and the included hard acetal backup ring resists extrusion. MRTUB is capable of pressures up to 10,000 psi in approved applications. Please consult Hercules Engineering for pressures above 6,000 psi.
SEAL INFORMATION MATERIAL 94 A URETHANE SEAL
RUBBER ENERGIZER
POLYACETAL ANTI-EXTRUSION RINGMAXIMUM OPERATING CONDITIONS MAXIMUM SPEED
3FT./SECPRESSURE RANGE
0 - 6,000 PSITEMPERATURE RANGE
-50° TO +230° FMAXIMUM EXTRUSION GAP PRESSURE 2,400 PSI 3,750 PSI 6,000 PSI 7,500 PSI 10,000 PSI MAX. RADIAL GAP (INCH) .040 .032 .024 .016 .010 PART NUMBER (Prefix)(CS) - (ID) - (Height) -
With nitrile seal bonded on each side by fabric material it also incorporates 2 full depth 'L' bearings to form a very strong assembly. This seal requires a two piece piston.
SEAL INFORMATION MATERIAL 70A NBR / FABRIC SEAL
ACETAL BEARING / BACK-UPTEMPERATURE RANGE -22° TO +212° F PRESSURE RANGE 0 TO 5,000 PSI SPEED 1.5 FT/SEC -
The MHMU style multi-lip rod u-seal combines the pressure-compensating, uni-directional characteristics of a u-seal with the multi-lip sealing effectiveness of compression-type stacked-packings. Made from premium materials, the MHMU utilizes several sealing lip edges for dry rod performance while minimizing friction. The multi-lip design maintains a critical sealing edge even though increasing pressure moves the line of contact down towards the heel.
SEAL INFORMATION MATERIAL URETHANE TEMPERATURE RANGE -50° to +230° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC PART NUMBER (Prefix) - (ID) x (OD) x (H) -
Manufactured to a large variety of widths and thicknesses, this material affords low friction capabilities but with low compressive strength. The material also has the capability of ingesting metal particles and keeping them from the seal area.
NOTE: List Price = 1 Foot (12")SEAL INFORMATION MATERIAL 60% BRONZE FILLED PTFE TEMPERATURE RANGE -50° to +390° F SPEED 12 FT/SEC COMPRESSIVE STRENGTH 1,700 PSI PART NUMBER (Prefix) - (W) x (TH) -
Utilizing a double lip of nitrile bonded to a carbon steel case, this wiper prevents contaminant ingression at the wiping lip and around the outer case.
SEAL INFORMATION MATERIAL URETHANE TEMPERATURE RANGE -30° to +200° F SPEED 3 FT/SEC -
SEAL RETAINER CROSS REFERENCE Hercules Sealing Prefix Ramsey Spirolox Prefix VS- US- WS- RS- WST- RSN- WSM- RST- -
The Style PSC is a double acting piston seal designed to replace o-rings, quad-rings, and T-seals with the same groove dimensions (O-ring dash number). Style 575 urethane back-up rings may be added to either or both sides of the 'PSC' to accommodate wider groove widths. The PSC is made of 95A Durometer polyurethane, giving it high extrusion and abrasion resistance. The crowned sealing surface produces a positive seal from vacuum to high pressure.
NOTE: Piston diameter 'I' dimensions are given for pistons without wear rings.SEAL INFORMATION MATERIAL 95A POLYURETHANE SEAL
70 A NITRILE ENERGIZERTEMPERATURE RANGE -40° to +200° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC PART NUMBER (Prefix) - (O-Ring Size) - (Wide Base) These Style PSC are molded from Fluorotrel which is a tough, wear-resistant material able to run at temperatures up to 275° F. Fluorotrel is also resistant to fluids that are incompatible with polyurethane such as water, glycol, water in oil, mineral oil and petroleum. Consult our Engineering Department for other fluids compatible with Fluorotrel
NOTE: Piston diameter "I" dimensions are given for pistons without wear rings.SEAL INFORMATION MATERIAL 55D FLUOROTREL SEAL
70A NITRILE ENERGIZERTEMPERATURE RANGE -40° to +235° F PRESSURE RANGE 0 to 5,000 PSI PART NUMBER (Prefix) - (O-Ring Size) - (Fluorotrel) -
Nylon Step Cut
Some PS2000 piston seals utilize a round instead of a square energizer. Also, piston diameter "I" dimensions are given for pistons without wear rings. Many sizes shown are completely interchangeable with style PS914 piston seals.SEAL INFORMATION MATERIAL GLASS FILLED NYLON SEAL RUBBER ENERGIZER TEMPERATURE RANGE -40° to +220° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC PART NUMBER (Piston Seal)(Type of Seal) - (Size) - (Groove Width) -
This seal, molded from high grade polyester with 5% glass fiber and 5% PTFE, may retrofit the PS1800 seals, considering all dimensions are comparable. This seal material, with a high degree of 'memory', stretches over the piston and snaps in the groove for immediate assembly. These seals also feature low friction and high abrasion and extrusion resistance which helps to eliminate assembly damage. Piston diameter 'F' dimensions are given for pistons without wear rings.
SEAL INFORMATION MATERIAL GLASS/PTFE FILLED POLYESTER SEAL, RUBBER ENERGIZER TEMPERATURE RANGE -40° to +220° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC PART NUMBER (Piston Seal)(Type of Seal) - (Size) -
The PS1850 piston seal can be used interchangeably with the PS1800 style piston seal. This seal provides improved heat resistance for demanding applications. NOTE: Piston diameter 'I' dimensions are given for pistons without wear rings.
SEAL INFORMATION MATERIAL BRONZE 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) -
The RBS style rod buffer seals are a rectangular urethane buffer ring designed to absorb pressure fluctuations thereby protecting the primary rod seal. Some sizes include a radial and axial slot, which faces the pressure, to relieve back pressure between the primary and buffer seal. This simple design is commonly found on older construction equipment.SL=SLOTTED
SEAL INFORMATION MATERIAL 92A URETHANE TEMPERATURE RANGE -40° to +200° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC PART NUMBER (Prefix) - (ID) X (OD)