Sealing Ring Inspection
Applicable products: Suitable for various rubber sealing products such as O-ring seals, skeleton oil seals, reciprocating seals, rectangular seals, irregular seals, combination seals, star seals, etc.
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Product Introduction

Detection range
Applicable products: Suitable for various rubber sealing products such as O-ring seals, skeleton oil seals, reciprocating seals, rectangular seals, irregular seals, combination seals, star seals, etc.
Applicable materials: Covering specialized sealing rubber materials such as nitrile rubber, fluororubber, silicone rubber, EPDM rubber, hydrogenated nitrile rubber, chloroprene rubber, polyurethane rubber, fluorosilicone rubber, etc.
Applicable scenarios: Used for raw material inspection, factory inspection, type testing, in use testing, sealing performance verification, and quality arbitration of sealing rings in hydraulic, pneumatic, mechanical, automotive, petrochemical, plumbing, home appliances, aerospace and other fields.
Testing items
Appearance and size inspection: There are no bubbles, cracks, missing glue, impurities, burrs, shrinkage marks, or delamination on the appearance; Detect inner diameter, outer diameter, section diameter, width, height, dimensional tolerance, coaxiality, and section uniformity.
Physical and mechanical performance testing: Shore A hardness, tensile strength, elongation at break, tear strength, compression permanent deformation, tensile permanent deformation, tensile stress, resilience testing.
Sealing performance testing: evaluation of room temperature pressure resistance, high temperature pressure resistance, leakage measurement, air tightness test, hydraulic sealing performance, anti extrusion performance, and anti torsion performance.
Medium resistance performance testing: Testing for resistance to hydraulic oil, fuel, lubricating oil, coolant, water, steam, acid and alkali, solvents, and chemical reagents.
Environmental and aging resistance performance testing: hot air aging, ozone aging, ultraviolet aging, low temperature brittleness, high and low temperature cycling, resistance to humidity and heat, and salt spray resistance testing.
Durability and performance testing: compression fatigue performance, reciprocating durability life, rotary seal durability performance, long-term seal reliability evaluation.
Special performance testing: evaluation of food contact safety, medical grade biocompatibility, conductivity, anti-static performance, flame retardancy, and low compression permanent deformation characteristics.

Testing standards
GB/T 3452.1-2017 Hydraulic and pneumatic O-rings - Part 1: Dimensional series and tolerances
GB/T 3452.2-2017 Hydraulic and pneumatic O-rings - Part 2: Appearance quality inspection
GB/T 3452.3-2016 Hydraulic and Pneumatic O-ring - Part 3: Material Specification
HG/T 2579-2019 O-ring for Hydraulic Systems
HG/T 2810-2020 Rubber Oil Seal
GB/T 528-2009 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber
GB/T 531.1-2021 Rubber, vulcanized or thermoplastic - Test method for indentation hardness - Part 1: Shore hardness tester method
GB/T 7759.1-2015 Determination of compression set of vulcanized rubber or thermoplastic rubber
GB/T 3512-2014 Rubber, vulcanized or thermoplastic - Accelerated aging and heat resistance test in hot air
GB/T 7762-2024 Rubber, vulcanized or thermoplastic - Static tensile test for resistance to ozone cracking
GB/T 1690-2010 Test Method for Liquid Resistance of Vulcanized Rubber or Thermoplastic Rubber
was established in 2011. As a national high-tech enterprise recognized by the Zhejiang Provincial Higher People's Court as a judicial authentication institution for construction engineering quality, we specialize in structural performance testing and safety assessment of construction projects, special equipment, communication towers, electromagnetic environments, large bridges, and building safety appraisal.
The company has more than 100 professional and technical personnel, over 90% of whom hold various medium and senior technical certificates. Equipped with complete testing equipment worth over RMB 10 million, our business scope covers the whole country.
















