Offers to Sell

Quiet parts tend to tell the loudest truths about equipment health. The o ring series seals out ambiguity across pumps, motors, hydraulic manifolds, and robotic actuators—defining whether systems hold pressure, resist media, and endure heat cycles. DEDE leverages decades of expertise from compound formulation to groove fit, enabling engineers to trust their assets without constant leak monitoring. What Defines an O Ring Series? An O-ring family is more than a circular cross-section—it's a system of sizes, materials, and durometers aligned with global standards and real-world duties: Size systems: AS568 (inch), ISO 3601, JIS B 2401 (metric) ensure consistent fit across glands. Static vs Dynamic: Static seals handle higher squeeze and pressure; dynamic seals require lower compression, smooth finishes, and lubrication to reduce abrasion and heat. Durometer: Typically 70 Shore A general purpose; 80–90 Shore A for high pressure; 50–60 Shore A for low temperature and delicate housings. Gland types: Piston, rod, and face glands fit different squeeze geometries; backup rings protect against extrusion under pressure. Materials and Performance Selecting the right elastomer shapes chemical resistance, temperature range, compression set, and durability: NBR (nitrile): For petroleum oils, fuels; −40 to 125°C; used in hydraulics, gearboxes. EPDM: Excellent for steam, hot water, polar chemicals; −40 to 125°C; common in water treatment, brakes. FKM (fluoroelastomer): Resistant to oils, fuels with ethanol, solvents; −20 to 250°C; ideal for chemical pumps, engine bays. VMQ (silicone): Wide temperature flexibility (−60 to 225°C); used in aerospace, electronics, static seals. Key Design and Installation Principles Radial squeeze: 10–30%; ID stretch: 2–8% depending on application. Gland fill: ≤85% max swell to prevent wear and damage. Surface finish: Smooth mating surfaces reduce abrasion and leakage. Lubrication: Use compatible lubricants to ease installation and reduce friction. Backups and clearances: Add PTFE or backup rings to avoid extrusion. Installation discipline: Avoid twist, use chamfers and deburred edges to prevent damage. Typical Applications Pumps, valves, motors, gearboxes, hydraulic and pneumatic systems. Industrial machinery, robotics, energy sector, construction, and agriculture. Metallurgy, chemical processing, water treatment, transportation, and household appliances. How DEDE Supports You With over 30 years in oil seal and O-ring manufacturing, DEDE offers: Extensive inventory of thousands of standard parts for fast delivery. Customized seals tailored to your media, pressure, motion, and installation. Expert technical support to optimize seal performance and reduce maintenance costs. Intelligent manufacturing, quality control, and global supply reach to 80+ countries. Choosing the Right O-ring Match elastomer to media and worst-case chemical exposure. Consider real temperature ranges including startup and hot spots. Balance pressure and motion requirements with durometer and backups. Align size standards early (AS568, ISO, JIS) to ensure fit and availability. When specifying, share your toughest duty cycle and constraints. DEDE combines material science, groove design, and reliable supply to keep your systems sealed and running smoothly.

Minimum Order: 1000

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Minimum Order: 1 bags

Liquid Crystals for PDLC Smart Film QYPDLC-193 Established in 2007, Qingdao QY Liquid Crystal Co., Ltd is a leading manufacturer specializing in high-quality nematic liquid crystals, primarily used in PDLC smart film and high grade of LC display. With over 18 years of nematic liquid crystals production expertise. Our LCs are widely exported to Europe, the United States, South Korea, and other global markets. The capable of our producing approximately 5000 kilograms per month. We signed the Exclusive Agency Agreement with our South Korean customer from 2011

Minimum Order: 20 square metres

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Billow Time Watch Co.,Ltd. is a professional OEM & ODM service provider for watches. We are mainly producing high-quality automatic watches, stainless steel watches, mechanical watches, sports watches, couple watches, jewelry watches and gift watches.

Minimum Order: 200

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Minimum Order: 200

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