Products

...the widest selection of standard & custom components

Rotary Seals from HPS

HPS offers the widest possible selection of standard products plus custom components designed specifically for your application. Our products are manufactured from the full spectrum of manufacturing technologies such as compression molding of thermoset materials, injection molding of thermoplastics and both net molding and machining of engineered plastics. From vacuum application to pressure of 10,000 PSI and beyond, "HPS has the solution".

Rod Seals

Hydra-pack Rod Seals

Rod Seals - BSX HYDRA-PACK™

BSX HYDRA-PACK™

The ultimate in dry rod sealing, even at low temperatures and pressures, through the use of dual mechanically joined seal elements, which are designed to react independently to changes in system pressure.

Hydra-Pack Family

Rod Seals - BSI HYDRA-PACK™

BSI HYDRA-PACK™

The same dry rod seal technology that is used in the standard BSX Hydra-Pack plus a positively actuated rigid back-up for use in higher pressure and / or larger extrusion gap applications.

Hydra-Pack Family

Loaded Lip U-Cups

Rod Seals - DEEP X-RING LOADED LIP U-CUP

DEEP X-RING LOADED LIP U-CUP

Manufactured from a range of thermoplastic and thermoset compounds and using a rubber quad shaped expander to provide memory to the seal contact points. - Standard non-beveled lip. - Rectangular cross section/profile for increased stability.

Loaded Lip U-Cup Catalog

Rod Seals - TYPE B

TYPE B "O" RING LOADED U-CUP

Similar in function to the "X" ring loaded lip u-cup, except using an o-ring expander to provide memory to the seal contact points.

Please contact us for product details
Rod Seals - STANDARD X-RING LOADED LIP U-CUP

STANDARD X-RING LOADED LIP U-CUP

Manufactured from a range of thermoplastic and thermoset compounds and using a rubber quad shaped expander to provide memory to the seal contact points. - Standard non-beveled lip. - Square cross section/profile

Loaded Lip U-Cup Catalog

Rod Seals - TYPE B X-RING LOADED LIP U-CUP

TYPE B X-RING LOADED LIP U-CUP

Manufactured from a range of thermoplastic and thermoset compounds and using a rubber quad shaped expander to provide memory to the seal contact points. - Back beveled lip - Rectangular cross section/profile for increased stability.

Loaded Lip U-Cup Catalog

Rod Seals - SQUARE B X-RING LOADED LIP U-CUP

SQUARE B X-RING LOADED LIP U-CUP

Manufactured from a range of thermoplastic and thermoset compounds and using a rubber quad shaped expander to provide memory to the seal contact points. - Back beveled lip - Square cross section/profile.

Loaded Lip U-Cup Catalog

Rod Seals - Z-SEAL

Z-SEAL

Top of the line loaded lip U-Cup with rubber sealing lip and TPU base for additional stability and enhanced extrusion resistance at low temperatures with high pressures.

Loaded Lip U-Cup Catalog

Unloaded Lip U-Cups

Rod Seals -

"UBR" ROD TYPE HEEL STABILIZED U-CUP

An asymmetrical rod seal with a secondary seal contact on the I.D. to assist in with stabilization. and Manufactured from a variety of materials including the very latest in high performance polyurethane compounds.

Unloaded U-Cup Catalog

Rod Seals -

"US" SYMMETRICAL U-CUP

Symmetrical rod and piston seals proven effective in a wide variety of applications and manufactured from a wide variety of seal materials.

Unloaded U-Cup Catalog

Rod Seals -

"UNR" ROD ASYMMETRICAL U-CUP

A single acting rod seal which has long been used in light, medium, and heavy duty hydraulic cylinders.

Unloaded U-Cup Catalog

Light Duty Rod U-Cups

Rod Seals - 8400 HOMOGENEOUS RUBBER U-CUP

8400 HOMOGENEOUS RUBBER U-CUP

A square cross section seal with a back beveled lip for increased sealability and film breaking.

Use gland dimensions pertaining to Unloaded or Loaded lip U-Cups. Please contact us for product details.
Rod Seals - 8500 HOMOGENEOUS RUBBER U-CUP

8500 HOMOGENEOUS RUBBER U-CUP

A square cross section seal, similar to the "8400" type (see Rod Seals) but without the back beveled lip and is often used as a piston seal.

Use gland dimensions pertaining to Unloaded or Loaded lip U-Cups. Please contact us for product details.

Piston Seals

T Seals

Rod Seals - CAPPED T-SEAL

CAPPED T-SEAL

A compact, bidirectional piston seal consisting of a filled PTFE cap, an elastomeric T-shaped energizer and rigid, positively actuated back-ups.

HPS HYDRA CAP-T Seal Family

Rod Seals - LOK HYDRA T-SEAL

LOK HYDRA T-SEAL

Significantly reduces the possibility of the back-up rings being damaged during assembly and is available in narrow, intermediate, and wide base configurations.

HPS Hydra-T Seal Family

Rod Seals - AHT HYDRA T-SEAL

AHT HYDRA T-SEAL

Eliminates the stress risers found in the sharp corners of the conventional T-seal by the use of a complementary radius and chamfer on the mating parts and available to retrofit one and two back-up o-ring grooves.

HPS Hydra-T Seal Family

Rod Seals - HT HYDRA T-SEAL

HT HYDRA T-SEAL

A compact, bidirectional seal proven to be extremely effective over a wide range of pressures, gaps, and fluids while retrofitting into a no back-up o-ring groove.

HPS Hydra-T Seal Family

Cap Seals

Rod Seals - RTPX CAP SEAL

RTPX CAP SEAL

Improves the sealability of PTFE cap seals by incorporating a more responsive elastomeric quad shaped ring into the dynamic sealing surface.

HPS Hydra-Cap Seal RTPX

Rod Seals - RTPS CAP SEAL

RTPS CAP SEAL

A square ring energized, rectangular cross section piston ring offering a wider seal footprint and improved stability than the STPO cap seal, while maintaining the availability of the full range of material selection.

HPS Hydra-Cap Seal RTPS

Rod Seals - STPO CAP SEAL

STPO CAP SEAL

An o-ring energized, square cross section piston ring manufactured from a variety of high performance engineered plastics including numerous PTFE blends.

HPS Hydra-Cap Seal STPO

Crown Seals

Rod Seals - CPB CROWN SEAL

CPB CROWN SEAL

Incorporates integral rigid back-ups to improve extrusion resistance while maintaining the increased stability of the CPW type crown seal.

HPS Crown Seal Family

Rod Seals - CPW CROWN SEAL

CPW CROWN SEAL

Increases the axial length of the narrower CP crown seal and is designed to retrofit wider grooves, such as those used for Capped T-seals, while significantly improving stability.

HPS Crown Seal Family

Rod Seals - CP CROWN SEAL

CP CROWN SEAL

The narrowest of the crown seal family, retrofitting a no back-up o-ring groove while providing improved bidirectional sealing through the use of a rubber energized thermoplastic seal element.

HPS Crown Seal Family

Hydralok™ Assembly

Rod Seals - HYDRALOCK™ ASSEMBLY

HYDRALOCK™ ASSEMBLY

A unique concept that significantly reduces the possibility of catastrophic failure by using a uniquely designed glass filled nylon bearing/retainer that facilitates the use of pedestal configured multiple seal rings on a one-piece piston.

* Please contact us for product details and groove dimensions.

Loaded Lip U-Cups

Rod Seals - TYPE B

TYPE B "X" RING LOADED LIP U-CUP

Manufactured from a range of thermoplastic and thermoset compounds and using a rubber quad shaped expander to provide memory to the seal contact points. - Back beveled lip - Rectangular cross section/profile for increased stability.

Loaded Lip U-Cup Catalog

Rod Seals - TYPE B

TYPE B "O" RING LOADED U-CUP

Similar in function to the "X" ring loaded lip u-cup, except using an o-ring expander to provide memory to the seal contact points.

Loaded Lip U-Cup Catalog

Unloaded Lip U-Cups

Rod Seals -

"US" SYMMETRICAL U-CUP

Symmetrical rod and piston seals proven effective in a wide variety of applications and manufactured from a wide variety of seal materials.

Unloaded U-Cup Catalog

Rod Seals - 8500 HOMOGENEOUS RUBBER U-CUP

8500 HOMOGENEOUS RUBBER U-CUP

A square cross section seal, similar to the "8400" type (see Rod Seals) but without the back beveled lip and is often used as a piston seal.

Use gland dimensions pertaining to Unloaded or Loaded lip U-Cups. Please contact us for product details.

Wear Guide & Non-Metallic Bearings

Non-Metallic Bearings - BC JOINT WEAR RING

BC JOINT WEAR RING

A non-metallic bearing manufactured from a variety of high performance materials, with a butt cut for installation.

Non-Metallic Bearings - SC JOINT WEAR RING

SC JOINT WEAR RING

A non-metallic bearing manufactured from a variety of high performance materials, with a scarf cut for installation and improved contamination resistance.

Non-Metallic Bearings - ST JOINT WEAR RING

ST JOINT WEAR RING

A non-metallic bearing manufactured from a variety of high performance materials, with a step cut to reduce the potential gap.

Non-Metallic Bearings - CN WEAR RING

CN WEAR RING

A non-metallic bearing manufactured in a continuous (no cut) ring from a variety of high performance materials.

Standard Wear Ring Materials

The physical properties of the most commonly used wear ring materials.

SD - (Standard Duty) Fiberglass loaded Nylon. For general hydraulic cylinder use.

FD - (Frictional Duty) Fiberglass and PTFE loaded Nylon. General hydraulic cylinder use with additional lubricant.

TB - (PTFE/Bronze) Highly lubricated for dry running surfaces and rotary use.

Design Data (Minimums)
Property SD FD TB
Tensile Strength (psi) 24000 20000 2600
Compressive Strength (psi) 23000 20000 1700
Flexural Strength (psi) 35000 30000 3350
Coefficient of Thermal Expansion (10 exp -5) 1.4 1.5 4.9
Water Absorption % .9 to 1.2 .9 to 1.2 <0.25
Deformation Under Load

 

% @ 2,000 psi

0.5 0.5 -----
  % @ 1,200 psi ----- ----- 2.2

Wear Ring Gland Materials

Calculation steps for designing the glands for wear ring applications.

Piston Wear Ring Calculation Sheet.pdf
Rod Wear Ring Calculation Sheet.pdf

Standard Wall Thickness for Wear Rings

Radial wall manufacturing tolerances for the various standard wear rings.

Standard Wear Ring Thickness(es)
W6 =.057/.060
WT=.075/.080
WH=.122/.125
WR=.120/.125
WB=.184/.187

Buffer Seals

BFR Buffer Seal

Rod Seals - BFR BUFFER SEAL

BFR BUFFER SEAL

A sealing device used as a "buffer" to reduce the impact of pressure spikes on the primary seal and consisting of an elastomeric energizer and a PTFE blend step shaped ring.

HPS BFR Buffer Seal

BUF Buffer Seals

Rod Seals - BUF BUFFER SEAL

BUF BUFFER SEAL

A sealing device used as a "buffer" to reduce the impact of pressure spikes on the primary seal and consisting of a lip type seal designed to relieve pressure and an integral rigid back-up ring.

HPS BUF Buffer Seal

SRS Buffer Seal

Rod Seals - SRS BUFFER SEAL

SRS BUFFER SEAL

A sealing device used as a "buffer" to reduce the impact of pressure spikes on the primary seal and consisting of rigid plastic and elastomeric components in a "self relieving" design

HPS SRS Buffer Seal

Rotary Manifold (Swivel) Seals

Rotary Manifold Seals - FLAT BOTTOM CROWN SEAL

FLAT BOTTOM CROWN SEAL

Proven very effective in sealing low-pressure ports in rotary manifold applications.

Rotary Manifold Seals - NARROW BASE FLAT BOTTOM CROWN SEAL

NARROW BASE FLAT BOTTOM CROWN SEAL

Designed to retrofit into square PTFE cap seal grooves and often used in rotary manifold applications requiring virtually "zero" leakage between ports.

Rotary Manifold Seals - HYDRA-GLYD CAP SEAL ASSEMBLY

HYDRA-GLYD CAP SEAL ASSEMBLY

Consists of a specially designed seal ring with a grooved dynamic surface to carry lubrication while increasing the unit load on the adjoining contact areas and used in conjunction with an elastomeric energizer (o-ring, square or quad shaped ring).

Rotary Manifold Seals - CAP SEAL WITH SIDE WALL NOTCHES

CAP SEAL WITH SIDE WALL NOTCHES

A radial compression cap seal with sidewall notches to provide instant pressurization in rapid pressure reversal conditions to prevent "fluid blow-by".

Rod Wipers

Rod Wipers - AN (959) WIPER

AN (959) WIPER

A light duty snap-in wiper that fits MS28776 glands.

Groove Dimension Drawing

Rod Wipers - D WIPER

D WIPER

A more robust snap-in exclusion device than the AN style and ideal for larger diameter rods.

Groove Dimension Drawing

Rod Wipers - DS WIPER

DS WIPER

Similar to the D wiper but with a slotted heel to eliminate the possibility of a pressure trap between the rod seal and wiper.

Groove Dimension Drawing

Rod Wipers - H WIPER

H WIPER

A dual lip snap-in wiper usually manufactured in polyurethane that retrofits the 8600 series rubber wiper groove.

Groove Dimension Drawing

Rod Wipers - K WIPER

K WIPER

A dual lip snap-in wiper similar to the H style, designed to fit into it?s own unique groove.

Groove Dimension Drawing

Rod Wipers - BK WIPER

BK WIPER

Retrofits into K wiper grooves but with a more aggressive scraping profile and a beaded OD to seal the static side against contaminants.

Groove Dimension Drawing

Rod Wipers - MC WIPER

MC WIPER

An aggressive press-fit polyurethane excluder, designed to incorporate both a mechanical and chemical bond between wiper element and steel retainer.

Groove Dimension Drawing

Rod Wipers - MCS WIPER

MCS WIPER

Incorporates a steel spring into the MC wiper design to exclude contaminants during severe service conditions including side loading and temperature extremes.

Groove Dimension Drawing

Rod Wipers - SC WIPER

SC WIPER

A press-fit wiper with a specially designed scraping lip that helps to keep mud or similar substances from solidifying within the wiper cavity and thus reducing its effectiveness.

Groove Dimension Drawing

O-Ring, 'X' ring & Back-Ups

O-Ring - O-RING

O-RING

Simplest seal shape molded from the broadest possible spectrum of high quality compounds.

O-Ring - HYDRA-BAK CONTOURED O-RING BACK-UP

HYDRA-BAK CONTOURED O-RING BACK-UP

Manufactured from a 90 Shore A durometer rubber compound, that is contoured to accept use with o-rings and which is easily stretched for installation.

O-Ring - FLAT SOLID O-RING BACK-UPS

FLAT SOLID O-RING BACK-UPS

Manufactured from extrusion resistant thermoplastic materials and may be stretched for ease of installation.

O-Ring - FLAT-SPLIT O-RING BACK-UPS

FLAT-SPLIT O-RING BACK-UPS

Manufactured from non-resilient materials such as polyamide, PTFE or other rigid materials and split to allow for installation.

O-Ring - SPIRAL O-RING BACK-UPS

SPIRAL O-RING BACK-UPS

Usually manufactured from PTFE and provides protection around the full circumference of the o-ring while retaining ease of installation.

O-Ring Material Codes and Temperature ranges
Polymer Key Temperature Range
Code Polymer ºF ºC
PZ Polyacrylate 0 to +350 -18 to +177
R Neoprene -65 to +302 -54 to +150
E Ethylene Propylene -65 to +302 -54 to +150
FZ Fluorosilicone -85 to +350 -65 to +177
N Nitrile (Buna N) -65 to +275 -54 to +135
U Polyurethane -65 to +212 -54 to +100
S Silicone -80 to +400 -62 to +205
V Fluorocarbon -20 to +450 -29 to +232
HN HNBR -13 to +320 -25 to +160
Back-up Material Codes and Temperature Ranges
Polymer Key Temperature Range
Code Polymer ºF ºC
DN Nitrile (Buna N) -30 to +250 -34 to +121
SC Polyurethane -65 to +212 -54 to +100
DH Hytrel -65 to +275 -54 to +135
AB PTFE -400 to +400 -240 to +205