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Rod Seals

Piston Seals

Wear Guide &
Non-Metallic Bearings

Buffer Seals

Rotary Manifold
(Swivel) Seals

Rotary Oil Seals

Rod Wipers

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

Engineering Tables


Product Description
O-RING
Simplest seal shape molded from the broadest possible spectrum of high quality compounds.

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.

FLAT SOLID O-RING BACK-UPS
Manufactured from extrusion resistant thermoplastic materials and may be stretched for ease of installation.

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.

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

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©2007 HPS, Inc. 1224 Forest Parkway, West Deptford, NJ 08066
Phone: 856-224-1120 | Fax: 856-224-1119 | E-mail: info@hpsseals.com