Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
OHM Piston Seal for Medium & Low Pressure Hydraulic Cylinders
Widely Used in Construction Machinery, Agricultural Machinery & Forklifts
The OHM Piston Seal is a high-performance sealing solution tailored for medium & low-pressure hydraulic cylinders. It integrates a U-shaped sealing ring and a dedicated anti-extrusion retainer, effectively preventing leakage and ensuring stable operation.
Operating within ≤21MPa pressure, -30℃~+100℃ temperature, and ≤0.5m/s reciprocating speed, it’s compatible with petroleum-based hydraulic oil, water-glycol fluid, etc.
Widely used in construction machinery, agricultural equipment, injection molding machines, and forklifts, it delivers reliable sealing, extends cylinder lifespan, and supports smooth equipment performance—ideal for boosting operational efficiency.
5.0
design customization
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Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
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1. Product Advantages
Dual-Structure Design: Integrates a U-shaped sealing ring (for tight leakage prevention) and a specialized anti-extrusion retainer (prevents deformation under pressure), ensuring long-term sealing reliability.
Broad Adaptability: Operates stably under a pressure of ≤21MPa, a temperature range of -30℃~+100℃, and a reciprocating speed of ≤0.5m/s; compatible with petroleum-based hydraulic oil, water-glycol fluid, and bio-oil.
Durable Performance: Crafted from high-wear and corrosion-resistant materials, which extends the service life of hydraulic cylinders and lowers maintenance costs.
2. Working Principle
During the operation of the hydraulic cylinder, the U-shaped ring adheres tightly to the inner wall of the cylinder through hydraulic pressure, blocking fluid leakage. The anti-extrusion retainer, mounted on the side of the U-shaped ring, resists the extrusion of the sealing material caused by pressure—this prevents gaps and maintains consistent sealing performance during reciprocating motion.
3. Product Details
Material Quality: The sealing ring is made of nitrile rubber (NBR) or fluororubber (FKM) (customizable options available); the retainer uses high-strength polyamide (PA) for impact resistance.
Precision Machining: Strict dimensional tolerance control (±0.02mm) guarantees a perfect fit with standard hydraulic cylinders, reducing assembly difficulty.
Safety Certification: Complies with ISO 9001 quality standards, and each unit undergoes pressure and leakage tests before delivery.
4. Application Range
Widely used in:
Mobile machinery: Forklifts, cranes, construction equipment
Agricultural machinery: Tractors, harvesters
Industrial equipment: Injection molding machines, light industry machinery
Specialized fields: Forestry machinery, mining equipment
5. FAQ
Q: Can the OHM seal be customized for non-standard cylinders?
A: Yes. Forever Seals offers custom solutions based on your specific cylinder size, pressure requirements, and fluid medium.
Q: What is the recommended replacement cycle?
A: Under normal usage conditions, it has a service life of 12–18 months; for harsh working environments, we recommend inspection every 6 months.
6. Enterprise Selling Points (Forever Seals)
15+ Years of Expertise: Dedicated to hydraulic sealing solutions, with a professional R&D team providing technical support.
Global Supply Chain: Fast delivery (7–15 days for standard products) and localized after-sales service across more than 20 countries.
Eco-Friendly Commitment: Utilizes lead-free and low-VOC materials, adhering to global environmental regulations.
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