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) |
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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) -
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) -
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) -
Molded in nitrile with steel case, this seal is double cased and used to exclude contaminants from cylinder link pins.
SEAL INFORMATION MATERIAL NITRILE SEAL
STEEL CASETEMPERATURE RANGE -40° to +220° F PART NUMBER (Prefix) - (ID) x (OD) X (H) -
This capped piston seal consists of a filled PTFE cap, a T-shaped NBR energizer, and two split nylon backup rings. It exhibits low friction, high sealability, and excellent resistance to extrusion and wear.SEAL INFORMATION MATERIAL PTFE PISTON SEAL NYLON BACK-UP NITRILE ENERGIZER TEMPERATURE RANGE -40° to +220° F PRESSURE RANGE 0 to 6,000 PSI SPEED 4.5 FT/SEC SUFFIX BR= BRONZE FILLED PTFE CAP PART NUMBER (Prefix) - (OD) x (ID) x (W) -
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) -
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 -
Style RU seals are molded from high quality urethane and designed specifically for rod applications. P = HIGH PERFORMANCE MATERIAL UP TO +275° F -
SEAL RETAINER CROSS REFERENCE Hercules Sealing Prefix Ramsey Spirolox Prefix VH- UR- WH- RR- WHM- RRN- WHT- RRT- -
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) -
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) -
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) -
This medium duty wiper is molded in nitrile rubber.
SEAL INFORMATION MATERIAL NITRILE TEMPERATURE RANGE -22° to +212° F SPEED 3 FT/SEC PART NUMBER (Prefix) - (ID) x (OD) X (H) -
Molded in nitrile, this double lipped wiper is found in Toyota lift trucks.
SEAL INFORMATION MATERIAL NITRILE TEMPERATURE RANGE -49° to +212° F SPEED 3 FT/SEC PART NUMBER (Prefix) - (ID) x (OD) X (H) -
Suffix:
EI = Top adapter has an internal anti-extrusion ring.
DR = Dry-rod application. Pre-loaded male adapterSEAL INFORMATION MATERIAL FABRIC / RUBBER VEE RINGS
FABRIC / RUBBER OR ACETAL ADAPTORSTEMPERATURE RANGE -35° to +220° F PRESSURE RANGE 0 to 5,000 PSI SPEED 1.5 FT/SEC PART NUMBER (Prefix) - (ID) x (OD) x (H)