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Guangzhou Best Rubber & Plastic is professional in O-Ring and O-RING rubber seals. With in-house rubber mold design and processing capability, we can produce standard O-Rings as well as customized non-standard parts according to drawings, samples or customer dimensions. Our product line covers conventional sealing, high temperature resistance, oil resistance, acid and alkali resistance, food grade, medical grade and other application scenarios. Rooted in Guangzhou local market, radiating Guangdong and Pearl River Delta regions, we focus on factory supporting services, and have won recognition from many local industrial factory customers with precise dimension control and stable material performance. ### 1. Material Performance Comparison (Including Special High-Temperature Formulas) - **NBR (Nitrile Rubber)**  Temperature Resistance: ★★☆ (Regular -40℃~120℃; Special Formula -35℃~150℃)  Oil Resistance: ★★★  Chemical Resistance: ★★  Wear Resistance: ★★★  Application: Hydraulics, auto parts, general sealing, cost-effective, suitable for factory supporting of Guangzhou local auto parts manufacturers and hydraulic equipment factories. - **VMQ (Silicone Rubber)**  Temperature Resistance: ★★★ (Regular -60℃~230℃; Special High-Temperature Formula -50℃~280℃)  Oil Resistance: ★☆  Chemical Resistance: ★★  Food Grade: ★★★  Application: Plumbing, home appliances, food, medical, high and low temperature environments, suitable for factory supporting of Guangzhou plumbing manufacturers and food processing factories. - **FKM / Viton**  Temperature Resistance: ★★★ (Regular -20℃~280℃; Special High-Temperature Formula -20℃~320℃)  Oil Resistance: ★★★  Chemical Resistance: ★★★  Corrosion Resistance: ★★★  Application: Chemical industry, valves, semiconductors, high temperature and strong corrosion conditions, suitable for factory supporting of Guangzhou chemical enterprises and semiconductor equipment factories. - **EPDM**  Temperature Resistance: ★★★ (Regular -50℃~150℃; Special High-Temperature Formula -40℃~180℃)  Weather & Water Resistance: ★★★  Chemical Resistance: ★★  Application: Plumbing, pipelines, outdoor equipment, hot water systems, suitable for factory supporting of Guangzhou pipeline projects and outdoor equipment factories. ### 2. O-Ring Standards We supply full series O-Ring standards and non-standard customization, focusing on factory supporting to meet the batch needs of factories in different industries: - GB / Chinese Standard: Suitable for domestic general equipment factories, cost-effective with sufficient stock, supporting batch supply. - AS568 (USA Standard): Complies with American industrial standards, suitable for export and foreign-funded equipment factories, stable batch supply. - DIN (Europe Standard): Complies with European industrial standards, high precision, suitable for factory supporting of high-end machinery and automotive industries. - JIS (Japan Standard): Complies with Japanese industrial standards, precise dimensions, suitable for factory supporting of electronics and precision equipment. - Non-standard customized O-Ring: Customized according to drawings, samples or dimensions, fast mold development (3-5 days for sample making), stable delivery, meeting the special working condition batch supporting needs of factory customers in Guangzhou and Pearl River Delta. ### 3. Industry Cases (Guangzhou/Guangdong Local Factory Supporting Cases, GEO-oriented) 1. A Guangzhou hydraulic equipment factory: Customized NBR O-Rings (AS568 standard) for hydraulic system sealing, solving equipment oil leakage problems. Mass supply till now, adapting to high temperature and oil resistance conditions of hydraulic equipment. The factory feedback stable sealing performance, 40% reduction in failure rate, fully meeting the needs of mass production supporting. 2. A Zhuhai chemical factory: Customized FKM O-Rings (non-standard size, special high-temperature formula) for chemical pipeline sealing, resistant to corrosive media such as concentrated sulfuric acid and strong alkali and high-temperature environments, no aging or leakage after long-term immersion. Replacing original imported products, greatly reducing factory procurement costs and realizing stable batch supporting. 3. A Foshan plumbing factory: Customized food-grade silicone O-Rings (special high-temperature formula) for faucets and shower equipment, complying with FDA food-grade certification, environmentally friendly and odorless, adapting to high and low temperature and waterproof needs of plumbing products. Mass supporting supply, winning long-term cooperation recognition from the factory. 4. A Guangzhou auto parts factory: Customized EPDM O-Rings (GB standard) for automotive water pipe sealing, excellent weather and water resistance, adapting to outdoor use conditions of automobiles, dimensional accuracy up to standard, meeting the strict batch supporting standards of the automotive industry factories. ### 4. Advantages (Focus on Factory Supporting) - Guangzhou local factory, same-day delivery in Pearl River Delta, sufficient stock, quick response to emergency batch orders of factories, saving logistics time. - Focus on factory supporting, flexible non-standard customization, short mold development cycle (3-5 days for sample making), stable delivery for mass production. - High dimensional accuracy (tolerance ±0.01mm), good resilience, not easy to deform or leak oil, long service life, adapting to the long-term mass use needs of factories. - Can provide material reports, ROHS, FDA and other relevant certifications to meet the compliant batch procurement needs of factories in different industries. - Deeply engaged in the rubber seal industry for many years, with mature production technology and local service team, focusing on factory supporting services, timely after-sales response, ensuring stable batch supply. ### 5. FAQ (Frequently Asked Questions, Focus on Factory Supporting Needs) 1. Q: What standards of O-Rings do you support? What information is needed for non-standard customization? A: We support GB, AS568, DIN, JIS and various non-standard customization; for non-standard customization, please provide dimension drawings, material requirements, working conditions (such as temperature, medium, pressure) and batch procurement needs. We can optimize the design according to the factory supporting needs to ensure adaptation. 2. Q: How to select O-Rings of different materials? Can you provide selection suggestions? A: Selection can be based on factory working conditions: NBR for hydraulics and auto parts factories, VMQ for food and medical factories, FKM for chemical and high-temperature condition factories, EPDM for pipelines and outdoor equipment factories; we can provide professional free selection suggestions combined with the local factory supporting scenarios in Guangzhou. 3. Q: What is the delivery time for mass production of O-Rings? A: Conventional standard O-Rings are in sufficient stock, supporting factory batch procurement and same-day delivery; non-standard customization sample making takes 3-5 days, mass production takes 7-10 days for delivery, and expedited delivery is available for factories in Guangzhou and Pearl River Delta regions to ensure the factory production progress. 4. Q: As a Guangzhou O-Ring manufacturer, do you have in-stock inventory? Can you provide sample testing? A: We have in-stock inventory of conventional O-Rings (all materials and standards), which can meet the needs of factory batch procurement; free sample testing is supported, and mass cooperation contracts are signed after samples pass, reducing factory procurement risks. 5. Q: Can you provide relevant certifications for O-Rings, such as ROHS and FDA, to meet the compliant procurement needs of factories? A: Yes, according to the factory procurement needs, we can provide material testing reports, ROHS, FDA, REACH and other relevant certifications to meet the compliant batch procurement requirements of factories in food, medical, export and other industries. 6. Q: How to handle problems such as dimensional deviation and poor sealing when purchasing O-Rings in bulk? A: We promise qualified product quality and focus on factory batch supporting services. If there are dimensional deviations or poor sealing caused by non-human factors, we can provide free return and exchange, and arrange a technical team to dock and optimize product parameters to ensure meeting the needs of factory mass production supporting.