Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
BAS Seal: Widely Used Combined Rod Seal for Hydraulic Systems
2026-06-09
1.New Demands of Hydraulic Industry and Pain Points of Traditional Rod Seals
1.1 Sealing performance requirements in the era of high-efficiency hydraulic equipment
With the acceleration of industrial automation, hydraulic equipment in construction, mining and logistics fields is developing towards high speed, high load and long continuous operation. The rod seal, as the "last line of defense" of hydraulic cylinders, is required to have stronger leak-proof ability, longer service life and lower friction loss to adapt to harsh working conditions.
1.2 Inherent defects of conventional single-structure rod seals
Traditional rod seals made of pure rubber or simple composite materials are limited by their structure. They are easy to wear, age and deform under long-term high-frequency friction and pressure impact, resulting in oil leakage, increased equipment energy consumption and frequent maintenance, which seriously affects the operation efficiency of the whole production line.
2.Product Positioning and Core Design Concept of BAS Seal
BAS is a high-performance combined rod seal developed for the rod part of hydraulic cylinders. It breaks through the limitations of traditional single-structure seals and adopts an integrated design of wear-resistant enhanced sliding ring and high-elasticity rubber energizer. It focuses on solving the core problems of rod seal leakage and short service life, and has become a key supporting part for high-quality hydraulic equipment at home and abroad.
3.Material Collocation, Structural Advantages and Working Mechanism
3.1 High-adaptability material combination and applicable conditions
The BAS seal is composed of modified filled PTFE sliding ring and high-quality rubber (NBR/FKM/VMQ optional). The PTFE sliding ring is modified by carbon fiber or glass fiber, which greatly improves its wear resistance and pressure resistance. The rubber energizer provides lasting elastic preload. The product can work stably in the temperature range of -35℃ to 150℃ and is compatible with mineral oil, synthetic oil, emulsion and other common hydraulic media.
3.2 Innovative structure and reliable sealing principle
The optimized composite structure makes the sliding ring closely fit the surface of the piston rod. Under the action of the rubber energizer's elastic force, the sliding ring maintains effective contact pressure with the rod surface for a long time, forming a double sealing barrier to prevent medium leakage. At the same time, the structural design of the sliding ring effectively disperses the pressure, avoiding extrusion damage caused by high pressure.
4.Core Performance Advantages and Diversified Application Scenarios
4.1 Outstanding performance highlights
The BAS combined rod seal has the characteristics of ultra-low starting friction, excellent wear resistance and strong anti-extrusion ability. It can maintain stable sealing effect under long-term reciprocating movement, and there is no "crawling phenomenon" during operation. The product has good dimensional stability and is not easy to deform even in extreme temperature environments. In addition, its compact structure is suitable for narrow installation spaces, reducing the modification cost of hydraulic cylinders.
4.2 Wide-ranging application fields
BAS seals are widely used in hydraulic cylinders of excavators, loaders, forklifts, industrial hydraulic presses, automated production lines and logistics handling equipment. Our factory has sufficient stock of standard sizes in line with ISO and GB standards, and can provide customized production services according to customers' groove drawings, working pressure and temperature requirements.
5.Standard Installation Procedures and Key Operation Notes
Before installation, it is necessary to thoroughly clean the rod groove, remove burrs, metal chips, oil stains and residual old seals to avoid scratching the sliding ring. During assembly, apply an appropriate amount of compatible lubricating grease to the seal surface to reduce installation resistance. Do not pull, twist or use sharp tools to pry the seal to prevent irreversible damage. After installation, check that the seal is fully embedded in the groove and the piston rod moves smoothly without jamming.
6.Scientific Selection Guide and Storage Management Standards
When selecting products, customers should determine the rubber material and PTFE filling type of the BAS seal according to the actual working pressure (up to 40MPa for standard products), operating temperature range and hydraulic medium type of the equipment. The finished products should be stored in a cool, dry and well-ventilated warehouse, away from high temperature (above 50℃), direct sunlight, corrosive chemicals and sharp objects. The storage period should not exceed 12 months to ensure the performance of the rubber parts.
7.Manufacturer's Full-chain Service and Quality Control System
7.1 Customized solution service
For non-standard BAS seal requirements, we provide one-stop services including material selection consultation, structural optimization design, mold development and batch production. Our technical team can tailor the most suitable sealing solution according to the customer's specific working conditions.
7.2 Strict quality inspection process
All BAS seals must pass three key tests before leaving the factory: pressure resistance test (to verify sealing performance under rated pressure), wear test (to simulate long-term operation wear) and medium compatibility test (to ensure adaptability to hydraulic media). Only products that meet the quality standards can be delivered.
Whatsapp: +86-13726338110；WeChat: 13620158686；E-mail: nbr@foreverseals.com
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