33-99No. Mufu E Rd. Gulou District, Nanjing, China [email protected] | [email protected]
33-99No. Mufu E Rd. Gulou District, Nanjing, China [email protected] | [email protected]
This handbook is most worth studying by Chinese O-ring manufacturers because it upgrades O-ring business from "selling rubber rings" into a complete system of engineering selection, application verification, quality control, failure analysis, standa...
Jul. 23. 2026
1. Overall Positioning: An O-Ring Is the Product of "Controlled Formulation + Controlled Curing + Controlled Defects" A qualified O-ring is defined starting from the formulation, made into compound during mixing, cured into shape in the mold, has it...
Jul. 23. 2026
Many customers, sales staff, and even engineers understand "FKM fluoroelastomer O-ring" as a "high-end material," "high-temperature-resistant material," or "chemical-resistant material," thereby forming a risky misconception: FKM is the better the h...
Jul. 23. 2026
Core conclusion: the most common and recommended way to express an O-ring dimension is ID × CS, i.e. "Inner Diameter × Cross-Section/Wire Diameter." For example, when "20×2.4" is not otherwise specified, it should generally be unde...
Jul. 23. 2026
EPDM O-rings suit water, hot water, low-pressure steam, ethylene/propylene-glycol coolant, brake fluid/ethylene-glycol-type brake fluid, and outdoor ozone-aging environments; they generally do not suit mineral oil, lubricants, hydraulic oil, gasolin...
Jul. 23. 2026
Core Differences Between Static-Seal and Dynamic-Seal O-Rings The same O-ring design cannot be directly applied to both static and dynamic seals — the fundamental reason is: a static seal mainly needs to solve "compress enough, seal well"; a d...
Jul. 23. 2026
1. Versions and Checklist As of 2026-05. Functional Module International/US Standard China Standard Meaning for Chinese Manufacturers O-ring dimensions, cross-section, tolerance, dash number ISO 3601-1:2012 + Amd 1:2019; ISO page s...
Jul. 23. 2026
Dynamic O-ring seals balance sealing force, friction, lubricating film, leakage, and service life. Static seals mainly focus on whether contact stress is maintained over the long term after compression; dynamic seals must also handle relative motion...
Jul. 23. 2026
Engineering work needs to check dimensional standards, groove standards, material standards, appearance quality standards, and application conditions at the same time. Domestic hydraulic and pneumatic equipment usually prioritizes the GB/T 3452 seri...
Jul. 23. 2026
1. What Can Be Accepted? Judging O-ring visual defects requires looking at defect type, visual grade, dimensional limits, defect location, and application risk together. In China, GB/T 3452.2-2007 "Hydraulic and Pneumatic O-Rings — Part 2: App...
Jul. 23. 2026
1. By Monomer System: Dipolymer FKM, Terpolymer FKM, Specialty FKM 1) Standard Dipolymer FKM: VDF/HFP, ~66% Fluorine This type generally corresponds to what the market calls "A-type FKM," "standard FKM," or "dipolymer FKM." The typical monomer compo...
Jul. 23. 2026
We already know that the maximum system pressure can be controlled with a normally closed pressure control valve — its primary port connects to system pressure, its secondary port connects to the tank. The spool controls based on the preset pr...
Jun. 23. 2026
Welcome to HOVOO, a Chinese seal factory. Production of PU, Rubber and PTFE seals. The seals include O-ring, piston seal, rod seal, Gray ring and gas seal.
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