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What's the Difference Between SPG,SPGO and SPGA Seals?A Complete Guide

2026-02-12 14:00:29
What's the Difference Between SPG,SPGO and SPGA Seals?A Complete Guide

Common Features Across These Seals

SPG,SPGO,and SPGA are compact double-acting piston seals for hydraulic cylinders. These seals provide reliable performance in excavators,heavy machinery,and industrial systems.They combine a slide ring with an elastomeric energizer for low friction and high-pressure resistance.

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SPG Seal Details

Double acting glide piston seal.Suited for one piece pistons.PTFE seal face with rubber energiser.Dual face materials gives pressure capability options.The SPG piston seal consists of a PTFE slide ring and a square NBR or FKM rubber energizer.Pressure range up to 310bar(4496psi).SPG is standard double acting sealing,a wide range of applications.Friction resistance is very low,no crawling phenomenon,strong wear resistance,and saving groove space.

 

 

SPGO Seal Details

SPGO is a low friction piston seal consisting of PTFE+Bronze seal ring and rubber o-ring used for two-way piston seal of Hydraulic cylinder.Spgo seal,also known as glyd ring,is a low friction piston seal,which improves the perfect combination of sealing performance and service life.SPGO is a standard combination seal for a wide range of appliC.A.Tions.It has the same performance as SPG and uses JIS standard O-ring,saving a lot of.For reciprocated hydraulic system,allow large extrusion gap,has wide application,high static and dynamic sealing performance.The application and performance are excellent in hydraulic cylinders.

 

 

SPGA Seal Details

SPGA is a double acting seal capable of passing over port.The Nylon sealing face has a step-cut joint for ease of installation.It composed a rubber energizer.This seal is use for Caterpillar equipment.The Nylon seal good for durability and extrusion and it is easy to fix on the piston for step cut.
 

 

Main Differences

SPGO typically uses bronze-filled PTFE for superior wear resistance in standard high- pressure applications.SPG offers similar compact design but often with standard PTFE and flexibility in energizer materials.SPGA stands out with nylon material and step-cut design for port-passing capability and easier installation on integrated pistons.
 

Seal Type

Primary Material

Key Design Feature

Pressure Capability

Best For

SPG

PTFE slide ring + NBR/FKM energizer

Compact, one-piece piston suitable

Up to 310 bar

General hydraulic cylinders, wide applications

SPGO

PTFE+Bronze ring + rubber O-ring

Standard groove, low friction

High pressure

Two-way sealing, excavators, heavy duty

SPGA

Nylon face + rubber energizer

Step-cut joint, port-passing capable

Double-acting

Caterpillar equipment, easy installation over ports