DEF SEALS Made in China - SPGW Heavy-Duty PTFE Piston Seal | High Pressure Double-Acting Compact Hydraulic Seal
2026-07-06
When it comes to heavy‑duty high‑pressure hydraulic sealing systems, the SPGW seal stands out as one of the most reliable compact PTFE piston seals for demanding industrial applications. As a professional SPGW seal manufacturer in China, DEF Seals delivers both standard and custom hydraulic sealing solutions to suit a wide range of heavy‑duty hydraulic and pneumatic scenarios worldwide.
Product Structure & Key Advantages
The SPGW seal is a high‑performance double‑acting compact hydraulic piston seal, composed of a wear‑resistant filled PTFE sealing ring, an elastic rubber O‑ring energizer, and two rigid POM backup rings. This composite PTFE construction offers:
Ultra‑low friction and zero stick‑slip movement
Superior extrusion resistance
High pressure endurance
Excellent chemical stability
These features make the SPGW seal perfectly adaptable to extreme and complex working conditions, including:
Pressure surges – stable sealing performance under instantaneous pressure spikes and long‑term high‑pressure operation
Wide temperature fluctuations – reliable sealing stability in variable high‑ and low‑temperature environments
Variable operating speeds – adapts to frequent reciprocating motion at different speeds without stick‑slip
Diverse hydraulic media – excellent compatibility with various hydraulic oils and industrial fluids
Enlarged extrusion clearances – effectively prevents seal extrusion and failure under large‑clearance conditions
SPGW Seal Core Technical Specifications
| Parameter | Value |
|---|---|
| Operating Pressure | ≤ 50 MPa |
| Operating Temperature | –45°C to +120°C (based on PTFE with NBR energizer) |
| Reciprocating Speed | ≤ 1.5 m/s |
| Diameter Range | 50 mm to 1000 mm |
| Design Standards | Compliant with GB/T 15242.1‑94 and GB/T 15242.3‑94, and can be designed to reference international equivalents |
Why Choose DEF Seals’ SPGW?
Superior extrusion resistance – Compared with the SPG type, the SPGW incorporates POM backup rings on both sides, significantly enhancing its resistance to extrusion, especially in high‑pressure and large‑clearance applications.
Engineered for heavy‑duty service – Specifically designed for harsh conditions involving pressure peaks, temperature swings, and considerable extrusion gaps, ensuring long‑term, leak‑free performance.
Wide Range of Applications
The SPGW seal is widely used in heavy‑duty hydraulic cylinders, construction machinery actuators, and precision industrial hydraulic equipment. It delivers stable, zero‑leakage sealing performance under continuous cyclic operation across industries such as:
Construction machinery – excavators, bulldozers, loaders
Industrial equipment – presses, injection moulding machines, metallurgical plants
Mobile hydraulics – hydraulic suspension cylinders, sliding cylinders, and crane components
How to Get an Accurate Quotation
To help global buyers receive precise and competitive quotations efficiently, we recommend preparing the following application details before inquiry:
Seal groove dimensions
Working pressure and temperature ranges
Reciprocating speed
Hydraulic fluid / media type
Surface finish requirements
Clearance specifications
Any custom requirements based on drawings or physical samples
With these complete technical details, DEF Seals can provide you with a customised, cost‑effective hydraulic seal solution that perfectly matches your heavy‑duty equipment needs.
About DEF Seals
As a professional industrial sealing supplier, DEF Seals specialises in SPGW heavy‑duty piston seals, standard hydraulic piston & rod seal series, and all types of modified PTFE composite sealing components. We support full‑custom industrial sealing projects – whether you need off‑the‑shelf seals or fully customised products per your drawings, samples, and field application conditions.
We adhere to strict production quality standards. Our SPGW seals offer outstanding wear resistance, extreme extrusion resistance, high pressure tolerance, and stable low‑temperature performance, serving heavy‑duty hydraulic equipment across construction machinery, injection moulding, automation, metallurgy, and marine industries. We provide a one‑stop sealing solution – from product design and material selection to mass production and after‑sales technical support – for clients worldwide.
Contact Us Today
If you are looking for a dependable SPGW seal manufacturer in China that delivers stable‑quality heavy‑duty PTFE piston seals and custom hydraulic sealing components, DEF Seals is your ideal partner. Send us your specifications, drawings, or application requirements, and we will provide you with a professional customised sealing solution and a competitive quotation promptly!
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Add：Dinghao Automatic Incubation Park, South China Industrial Park, Liaobu Town, Dongguan City, Guangdong Province
Zip: 523410
Fax：0769-83260340
Email：defseals@defseals.com