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UKP u-seals are designed to act as a positive sealing, low friction replacement for conventional rubber u-seals. Molded from polyurethane, UKP u-seals provide long life and high resistance against extrusion. Low friction allows these seals to run smoothly in lubricated or non-lubricated cylinder. Available for bore sealing, the flexible dynamic lip provides very low breakaway friction and steady motion. -
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.) -
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 -
This light duty wiper is molded in polyurethane and features a double stepped shoulder to fit tightly in the gland throat.
SEAL INFORMATION MATERIAL URETHANE TEMPERATURE RANGE -22° to +212° F SPEED 3 FT/SEC PART NUMBER (Prefix) - (ID) x (OD) X (H) -
SEAL INFORMATION MATERIAL RUBBER SEAL
STEEL CASETEMPERATURE RANGE -40° TO +225° F PRESSURE RANGE 10 PSI @ 1000 FPM PART NUMBER (Prefix) - (ID) X (OD) X (H) -
Metal Clad WiperSEAL INFORMATION MATERIAL BUNA-N TEMPERATURE RANGE -22° to +212° F SPEED 3 FT/SEC PART NUMBER (Prefix) - (Size) -
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. -
These parts are used as companion pieces for Cascade Vee Sets, used primarily as bearings. The bore sizes shown are nominal and are used in oversized bores of = .015 in. to = .030 in.
SEAL INFORMATION MATERIAL 60D POLYESTER TEMPERATURE RANGE -65° to +220° F SPEED FT/SEC PART NUMBER (Prefix) - (Bore Diameter) -
Style PU seals are molded from high quality urethane and designed specifically for piston applications. -
Molded from tough polyurethane material, these seals offer high resistance to wear and abrasion. Energized with a four-lobed ring they have greatly increased low pressure performance.
SEAL INFORMATION MATERIAL URETHANE TEMPERATURE RANGE -40° to +200° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC SUFFIX HT = HIGH TEMPERATURE PART NUMBER (Prefix) - (ID) x (OD) x (H) -
Molded in urethane, this wiper features a lip on the outer diameter to aid in contaminant exclusion.
SEAL INFORMATION MATERIAL URETHANE TEMPERATURE RANGE -30° to +200° F SPEED 3 FT/SEC PART NUMBER (Prefix) - (ID) x (OD) X (H) -
Molded from filled PTFE and machined to close tolerances these seals feature low friction and excellent wear characteristics. Nitrile o-rings are used for energizers.
SEAL INFORMATION MATERIAL PTFE PISTON SEAL
70A NITRILE ENERGIZERTEMPERATURE RANGE -40° TO +230° F PRESSURE RANGE 0 TO 5,000 PSI SPEED 12 FT/SEC PART NUMBER (Prefix) - (ID) x (W) x (CS1) -
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 -
Style UPU Premium U-Seals are molded from ultra tough urethane for severe service conditions. They feature higher tensile strength and modulus for extrusion resistance. These seals are used in high energy services such as rock drills and shock absorbing devices where high internal heat is generated.SEAL INFORMATION MATERIAL 93A URETHANE TEMPERATURE RANGE -65° to +300° F PRESSURE RANGE 0 to 5,000 PSI SPEED 3 FT/SEC PART NUMBER (Prefix)(CS) - (Inside Dia) - (Height) 
Standard - Height and cross section are equal, thus giving a square seal. Utilizes type 'D' lip. Typical Part Number UPU25-2.50 
Deep - Utilizes the same 'D' lip, but the seal height is greater than the cross section, thus giving a rectangular shape. Typical Part Number UPU25-2.50-37D 
Type SQB - Same dimensions as the Standard seal. Beveled lip design provides better film breaking. Utilizes type 'B' lip. Typical Part Number UPU25-2.50-SQB 
Type B - Same dimensions as the Deep seal. Beveled lip design provides better film breaking. Utilizes type 'B' lip. Typical Part Number UPU25-2.50-37B -
SCS Powerbands®
SCS Sealing Products is pleased to introduce our new line of Powerband® tight tolerance premium wear-rings. Manufactured from a highly engineered blend of premium nylon, glass fiber, and PTFE, Powerbands® offer a high strength wear-ring for all cylinder applications, including those with minimal lubrication. And, with a coefficient of friction nearly 50% lower than our standard product, your cylinders will run smoother and more efficiently than ever.All Powerbands® are fully machined with cross-section tolerances of only ±0.001 in, chamfered corners, and scarf or angle-cut end gaps. Compared to standard tolerances of ±0.0025 in., this tightened tolerance improves the alignment and concentric operation of cylinder rods and pistons. The fully machined chamfered corners will better accommodate cylinder housing grooves, further improving piston and rod alignment. Lastly, the scarf-cut end gap reduces the loss of bearing support that may occur during cylinder side-loading. When combined, these features reduce the tolerance stack-up within the components of the cylinder. As a result, your cylinders will operate more consistently and be capable of operating at higher pressures and higher side loads than with standard wear-ring products. Furthermore, with this improved cylinder operation, your seals will last longer and the life of your cylinder will be extended. Powerbands® are currently available in our most popular wear-ring dimensions, as shown here. If you do not see your size or would like more information on this innovative product, please contact SCS.
SEAL INFORMATION TEMPERATURE RANGE -40° to +275° F TENSILE STRENGTH 20,000 PSI FLEXURAL STRENGTH 34,000 PSI COMPRESSIVE STRENGTH 20,000 PSI PART NUMBER (Prefix) - (OD) - (Height)
