Molded from tough, wear resistant polyester with additives of 5% glass fiber and 5% PTFE these seals are totally interchangeable with style MPS seals of the same dimensions. Nitrile o-rings are used as energizers.
| SEAL INFORMATION | |
|---|---|
| MATERIAL | GLASS / PTFE FILLED POLYESTER SEAL, RUBBER ENERGIZER |
| TEMPERATURE RANGE | -40° to +230° F |
| PRESSURE RANGE | 0 to 5,000 PSI |
| PART NUMBER | (Prefix) - (ID) x (W) x (CS1) |
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 |
| SEAL INFORMATION | |
|---|---|
| MATERIAL | FABRIC REINFORCED
RUBBER URETHANE RING/NYLON ADAPTORS |
| TEMPERATURE RANGE | -35° to +220° F |
| PRESSURE RANGE | 0 to 10,000 PSI |
| SPEED | 1.5 FT/SEC |
| PART NUMBER | (Type of Seal) (ID) (CS) X (Height) |
FLUOROCARBON = "V"
| SEAL INFORMATION | |
|---|---|
| MATERIAL | 95A URETHANE | 95A FLUOROCARBON |
| TEMPERATURE RANGE | -65° to +220° F | -20° to +400° F |
| PRESSURE RANGE | 0 to 5,000 PSI | 0 to 2,000 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 U25-2.50 |
 |
Deep - Utilizes the same 'D' lip, but the seal height is greater than the cross section, thus giving a rectangular shape. Typical Part Number U25-2.50-37D |
 |
Type SQB - Same dimensions as the Standard seal. Beveled lip design provides better film breaking. Utilizes type 'B' lip. Typical Part Number U25-2.50-SQB |
 |
Type B - Same dimensions as the Deep seal. Beveled lip design provides better film breaking. Utilizes type 'B' lip. Typical Part Number U25-2.50-37B |
| SEAL INFORMATION | |
|---|---|
| MATERIAL | 95A URETHANE 70A NITRILE RUBBER |
| TEMPERATURE RANGE | -40° to +200° F |
| PRESSURE RANGE | 0 to 5,000 PSI |
| SPEED | 3 FT/SEC |
| PART NUMBER | (Prefix)(CS) - (Inside Dia) - (Height) |
 |
Suffix: ZF = Fluorotrel (-40° to +235° F) ZL = Low Temperature Nitrile Sealing Lip (-65° to +200° F) ZLF = (-65° to +200° F) |
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) |
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 BEARING |
| TEMPERATURE RANGE | -22° to +212° F |
| PRESSURE RANGE | 0 to 6,000 PSI |
| MAXIMUM SPEED | 1.5 Ft/Sec. |
| PART NUMBER | (Prefix) - (Size) |
Suffix:
EI = Top adapter has an internal anti-extrusion ring.
DR = Dry-rod application. Pre-loaded male adapter
| SEAL INFORMATION | |
|---|---|
| MATERIAL | FABRIC / RUBBER VEE RINGS FABRIC / RUBBER OR ACETAL ADAPTORS |
| TEMPERATURE 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) |
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-UPS |
| TEMPERATURE RANGE | -40° to +220° F |
| PRESSURE RANGE | 0 to 6,000 PSI |
Molded in urethane and employing a back-up, this seal absorbs the shock of pressure spikes protecting the rod seal. The unique design relieves back pressure between the buffer and the rod seal.
| SEAL INFORMATION | |
|---|---|
| MATERIAL | URETHANE BUFFER NYLON BACK-UP |
| TEMPERATURE RANGE | -30° to +220° F |
| PRESSURE RANGE | 0 to 7,000 PSI |
| SPEED | 3 FT/SEC |
| PART NUMBER | (Prefix) - (ID) x (OD) x (H) |
| 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) | ||
| SEAL INFORMATION | |
|---|---|
| MATERIAL | HYTREL & NYLON |
| TEMPERATURE RANGE | -40° to +220° F |
| PRESSURE RANGE | 0 to 6,000 PSI |
| SPEED | 1.5 FT/SEC |
| PART NUMBER | (Prefix) - (# of vees) - (OD) - (Bearing Height) |
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) |
