- 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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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. -
INSTALLATION OF PTFE PISTON SEALS
Installing PTFE piston seals is not always an easy task. The use of installation tools 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 15% 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) -
Totally interchangeable with Style PS1400 PTFE piston seals, Style PS1500 piston seals are molded from tough 60 shore D durometer polyurethane. During the molding process, a .002 in. thick band of molybdenum is molded into the outside diameter of the seal ring for reduced friction. PS1500 piston seals are easily stretched over the piston and recover rapidly with the elimination of the 'cold flow' characteristics found in PTFE seals. Piston diameter 'F' dimensions are given for pistons without wear rings.
SEAL INFORMATION MATERIAL POLYURETHANE SEAL RUBBER ENERGIZER TEMPERATURE RANGE -40° to +200° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC PART NUMBER (Piston Seal)(Type of Seal) - (Size) -
The PS1800 provides low friction, high strength piston sealing. The PS1800 also provides double-acting piston sealing in a compact design that meets the requirements of ANSI/B93-32-1973. NOTE: Piston diameter 'I' dimensions are given for pistons without wear rings.
SEAL INFORMATION MATERIAL 15% 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) -
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) -
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) -
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) -
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) -
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) -
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) -
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) -
Style PSA-58 piston seals combine a heavy duty, fabric reinforced seal with two polyacetal 'L' bearings. This construction allows the seal to withstand pressures up to 5,000 PSI. 'L' bearings also react to pressure to prevent extrusion and support the piston. For 2-piece pistons.
SEAL INFORMATION MATERIAL FABRIC REINFORCED NITRILE SEAL POLYACETAL ANTI-EXTRUSION RING TEMPERATURE RANGE -22° to +212° F PRESSURE RANGE 0 to 5,000 PSI MAXIMUM SPEED 1.5 ft / second PART NUMBER (Prefix)(Type of Seal) - (Size) -
This style is designed for 2 piece piston. The seal is a molded Nitrile rubber element with bonded rubberized fabric reinforcement and two anti-extrusion polyacetal bearings.
SEAL INFORMATION MATERIAL FABRIC REINFORCED NITRILE SEAL POLYACETAL ANTI-EXTRUSION RING TEMPERATURE RANGE -22° to +212° F PRESSURE RANGE 0 to 5,000 PSI MAXIMUM SPEED 1.5 ft / second PART NUMBER (Prefix)(Type of Seal) - (Size) -
Compact and easy to install, the Style PSA-65 piston seal is a simple and economical design for pressures up to 3,000 PSI. The assembly consists of a nitrile rubber seal and two polyacetal bearings to support the piston. For 1-piece pistons.
SEAL INFORMATION MATERIAL NITRILE SEAL POLYACETAL ANTI-EXTRUSION RING TEMPERATURE RANGE -22° to +212° F PRESSURE RANGE 0 to 3,000 PSI MAXIMUM SPEED 1.5 Ft/Sec. PART NUMBER (Prefix)(Type of Seal) - (Size) -
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) -
Designed to fit on one or two piece pistons, this seal employs a nitrile seal element, PTFE split back-up rings and polyacetal split bearing rings.
SEAL INFORMATION MATERIAL NITRILE SEAL POLYACETAL ANTI-EXTRUSION RING TEMPERATURE RANGE -22° to +212° F PRESSURE RANGE 0 to 3,000 PSI SPEED 3 FT/SEC PART NUMBER (Prefix) - (O-Ring Size) -
Molded from 93 Shore A polyurethane with a 70 Shore A energizer, this seal utilizes the same groove dimensions as a standard o-ring to T-seal. One or two Style 575 back-up rings may be used for wider grooves. Extrusion resistant by design, this seal also is resistant to rolling and twisting. Installation is an easy two step snap-in procedure with no need to re-size before insertion into the bore. NOTE: Piston diameter 'I' dimensions are given for pistons without wear rings.
F= Fluorotrel, WB= Wide BaseSEAL INFORMATION MATERIAL 93A URETHANE SEAL
70A NITRILE ENERGIZERTEMPERATURE RANGE -65° to +220° F PRESSURE RANGE 0 to 5,000 PSI PART NUMBER (Prefix) - (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. NOTE: Piston diameter 'I' dimensions are given for pistons without wear rings.
SEAL INFORMATION MATERIAL 40% BRONZE FILLED PTFE SEAL, RUBBER ENERGIZER AND QUAD® RING TEMPERATURE RANGE -40° to +250° F PRESSURE RANGE 0 to 5,000 PSI SPEED 6 FT/SEC PART NUMBER (Piston Seal) - (Size) MAXIMUM EXTRUSION GAP PRESSURE 1000 PSI 3000 PSI 5000 PSI MAX DIAM. GAP
BORE 1-1/2" - 5"0.024" 0.008" 0.005" MAX DIAM. GAP
BORE 6" - 10"0.030" 0.010" 0.006" -
Our Style PSU piston seal, or uniring, is a laminated one piece double acting seal made of cast polyurethane. The tough outer layer is highly resistant to abrasion and is impregnated with molybdenum disulfide to reduce friction. The softer inner layer acts as a static seal and also energizes the OD to make full contact with the bore. This seal may be used to replace an existing Uniring or other seals of the same dimensions - O-rings, O-rings with back-ups, T-seals, U-seals, etc. NOTE: Piston diameter 'I' dimensions are given for pistons without wear rings.
SEAL INFORMATION MATERIAL 60D & 57A
URETHANE COMPOSITETEMPERATURE RANGE -65° to +220° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC PART NUMBER (Prefix) - (OD) x (ID) x (Groove Width) -
Style PU seals are molded from high quality urethane and designed specifically for piston applications. -
QR, BUNA-N QUAD RINGS
The four-lobed design of these seals provides twice the sealing surface of ordinary o-rings. They can be used in a variety of static and dynamic sealing applications including rotary, reciprocating or oscillating motion.
NOTE: Last three digits of part number corresponds to standard o-ring dash numbers (568-218 = QR-4218)
V = FLUOROCARBONSEAL INFORMATION MATERIAL BUNA-N RUBBER TEMPERATURE RANGE -40° TO +240°F PRESSURE RANGE VARIES ACCORDING TO DIAMETRAL CLEARANCE PART NUMBER (Prefix) - (Dash No.) -
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) -
The twin lip design helps solve difficult rod sealing problems by providing lower friction, increased stability, and high dynamic lip force, while preventing air penetration from outside the cylinder. -
Featuring high pressure and high shock load capability, this seal utilizes the same twin lip design found in Hercules Sealing Products' RTU style. With the main body of the seal molded from high performance polyurethane, this seal incorporates a dynamically designed nitrile energizer and a tough polyacetal anti-extrusion ring. RTUB is capable of pressures up to 10,000 psi in approved applications. Please consult Hercules Engineering for pressures above 6,000 psi. MAXIMUM EXTRUSION GAP PRESSURE/MAX. DIAM. GAP: |2,400 PSI/.040| |3,750 PSI/.032| |6,000 PSI/.024| | 7,500 PSI/.016| |10,000 PSI/.010| -
Molded from high performance polyurethane, Style RTUL Rod U-Seals feature an expander for good low pressure sealing. The twin lip feature reduces friction and promotes stability. NOTE: RTUSL has a canted coil energizer. -
Style RU seals are molded from high quality urethane and designed specifically for rod applications. P = HIGH PERFORMANCE MATERIAL UP TO +275° F -
Style RU9 seals are molded from MDI based Zurcon® Z25 urethane. This seal offers good elasticity with low compression set while maintaining a high level of tribological characteristics. The dynamic seal lip incorporates slide segments that will increase back-pumping capabilities while reducing friction. The RU9 style rod seal is ideal for hydraulic applications where high temperature and high pressure performance is required.SEAL INFORMATION MATERIAL 95A URETHANE TEMPERATURE RANGE -31° to +270° F PRESSURE RANGE 0 to 5,800 PSI SPEED 1.65 FT/SEC PART NUMBER (Prefix)(CS) - (ID) - (Height) MAXIMUM EXTRUSION GAP PRESSURE 1000 PSI 3000 PSI 5000 PSI 6000 PSI MAX DIAM. GAP 0.032" 0.015" 0.012" 0.009" -
SFS SPLIT FLANGE SEALS
FOR 4-BOLT SPLIT FLANGE CONNECTORS
Flange seals are a one piece dual durometer urethane static seal. The black outer part is a tough, extrusion resistant 95 Durometer and the yellow inner layer is 57 Durometer that has low compression set and excellent sealing properties. These seals are a direct replacement for o-rings and do not require modification to any split flange groove.SEAL INFORMATION MATERIAL URETHANE TEMPERATURE RANGE -40° TO +200°F PRESSURE RANGE 0 TO 3000 PSI SPEED STATIC PART NUMBER (Prefix) - (Dash No.) -
SG - 'Seal Guard' Metallic Rod
Each Seal Guard Wiper consists of two flexible bronze rings which are held in place by a nitrile cushion ring. The cushion ring absorbs side loads and energizes the wiper to maintain close contact with the rod. Particularly suited for hostile environments, seal guard wipers shave off sand, grift, slag, flux, paint, moisture, chips and slivers. Seal Guard Wipers are long-lasting, self-adjusting, and offer low friction. Seal Guard Wipers can be installed in standard Hercules® Sealing Products “ST” or “D” Style grooves by increasing the “F” gland dimension to the “F” Throat Diameter shown.SEAL INFORMATION MATERIAL 660 BRONZE
70A NITRILETEMPERATURE RANGE -40° to +240° F PART NUMBER (Prefix) - (Size) -
IRON PISTON RINGS
When using iron piston rings, it is crucial to use the correct groove design for proper performance of the cylinder. Please use the following guidelines when cutting an iron piston ring groove- GROOVE WIDTH:
- To permit the ring to slide freely into the groove, the groove must be at least 0.001 in. wider than the maximum piston ring width with a tolerance of +0.003 in./-0.000 in.
- GROOVE DEPTH:
- Grooves must be at least 0.015 in. deeper than the maximum radial wall thickness of the piston ring with a tolerance of +0.003 in./-0.000 in. This is to avoid any possibility of the ring bottoming in the groove when the ring is compressed to its working diameter.
- RADIAL CLEARANCE:
- The radial clearance between the cylinder bore and piston should be less than 1/3 of the radial wall thickness of the piston ring to ensure sealing effectiveness.
SEAL INFORMATION MATERIAL IRON PART NUMBER (Prefix) - (OD) BC = Butt Cut H = Hook Joint END CLEARANCE
End clearance on piston rings depends on ring design, material and application. The following end clearances are provided as a standard for hydraulic cylinder applications.DIAMETER BUTT & ANGLE CUT END CLEARANCE OVERLAPPING JOINT & STEP CUT CLEARANCE .500 - 4.561 .003/.010 .005/.015 4.562 - 19.97 .005/.015 .010/.020 19.971 - 30.5 .010/.025 .015/.030 -
U-Seal Retainer Ring
These rings are split for ease of installation and are retained in a groove. Their use is primarily to retain a single acting piston seals. Commonly used with UFN style piston seals.SEAL INFORMATION MATERIAL ACETAL TEMPERATURE RANGE -22 ° TO +212°F
