Tools & Hardware

Metal-cased oil seal are widely used in pumps, gearboxes, motors, engines, hydraulic systems, and heavy machinery. Their dual function—keeping lubricants inside while blocking dust and contaminants—makes them essential for reliable equipment performance. However, one aspect that is often underestimated is storage. If seals are stored improperly, they may harden, crack, or deform before they are ever installed. Material Characteristics Several common rubber compounds are used for metal-cased oil seal: · NBR (Nitrile Rubber): Good resistance to oils but vulnerable to ozone and high temperatures. It should be kept away from heat and direct sunlight. · FKM (Fluoroelastomer): Excellent resistance to heat and chemicals but not ideal in prolonged humidity. · ACM (Acrylic Rubber): Performs well under oil and heat exposure, though sensitive to UV light. · EPDM (Ethylene Propylene Rubber): Strong resistance to aging and steam, but incompatible with mineral oils. Because each compound reacts differently to its environment, storage guidelines should be adapted to the material. Storage Guidelines In general, oil seals should be stored in a cool, dry, and stable environment. A temperature range of 10°C to 25°C and a relative humidity of 40% to 70% is considered suitable. Packaging should remain intact until use. If cartons are opened, seals should be resealed to avoid oxidation and ozone exposure. Another detail is to avoid long-term pressure on the sealing lips. Stacked seals that bear weight for months may deform, which directly compromises their sealing ability once installed. Why It Matters for Distributors For distributors and wholesalers, improper storage means more than product degradation—it means financial loss and reputational risk. Clients in industries such as automotive, trucks, heavy equipment, metallurgy, wind energy, and chemicals expect seals that are reliable right out of the box. If seals show signs of premature aging, buyers may look elsewhere for supply. Therefore, professional storage practices can be a selling point for distributors. A warehouse that demonstrates proper handling and inventory management can strengthen trust with clients. Support from DEDE DEDE, with over 30 years of experience in sealing technology, provides more than just products. The company offers: · Standard seals in stock: Covering thousands of O-ring and oil seal specifications, ready for urgent demand. · Customized solutions: From material selection to design and testing, ensuring seals match the actual working conditions. · Technical guidance: Including recommendations on storage and application to reduce waste and lower maintenance costs. As a manufacturing-based enterprise and recognized industry leader, DEDE exports to over 80 countries worldwide and holds certifications such as High- Tech Enterprise, Provincial Innovation Center, and Specialized and Innovative Enterprise. For distributors and wholesalers, partnering with DEDE means access to reliable supply and strong technical support. Proper storage of metal-cased oil seal is not just a technical detail—it is part of safeguarding product performance. Different materials require tailored conditions, but the common goal is to preserve integrity until installation. Distributors who adopt correct storage practices, and who work with suppliers like DEDE, are better positioned to protect their inventory, reduce losses, and earn long-term trust in the marketplace.

Minimum Order: 1000

It’s a scene I’ve watched play out countless times. A pump line goes down in a plant. The maintenance crew knows it’s a seal issue, a small O‑ring has failed. In the past, that meant a trip back to the storeroom, a search through drawers of loose parts, or worse, a call to a supplier and a day of waiting. Now, the lead tech reaches for a compact plastic case. Inside: rows of neatly arranged O‑rings in dozens of sizes, each in its own compartment. He finds the match in under a minute. The pump is running again before the coffee in his mug cools. That’s the quiet efficiency of an O‑ring kit. What’s in the Box A well‑built kit isn’t random. It’s curated. You’ll find common sizes in both metric and imperial standards, made from materials that cover the majority of industrial needs: NBR for oil and fuel resistance in engines, gearboxes, and hydraulic systems. FKM for high‑temperature, chemical‑exposed environments like chemical plants or refineries. EPDM for water, steam, and ozone resistance — think water treatment or wind turbines. VMQ for low‑temperature flexibility in aerospace or food machinery. Pressure ratings vary, but a quality O‑ring in static service can handle up to 40 MPa. The right material choice is what keeps that rating meaningful. Why Distributors Care For a distributor or wholesaler, kits solve two problems at once: · Inventory simplification – one SKU covers dozens of potential needs. · Customer loyalty – when you can hand a client a ready‑to‑go kit, you’re not just selling parts, you’re selling uptime. · Custom kits are even better. If your customers burn through certain sizes, you can have a kit built around those, cutting waste and cost. About DEDE At DEDE, we’ve spent over 30 years refining this approach. Our standard parts ship fast — over ten thousand O‑ring and oil seal specs in stock, ready for urgent orders. For clients with unique demands, our custom service covers material selection, design tweaks, and full production testing. And because we’ve invested in technical empowerment, we help customers improve sealing performance, reduce maintenance budgets, and extend equipment life. We’re not just a supplier. With our own manufacturing facility, recognition as a leader in the sealing industry, and shipments to over 80 countries, we’ve built a reputation with global brands. Add in our status as a Provincial Technology Innovation Center, Specialized and Innovative Enterprise, High‑Tech Enterprise, and Leading Company in a Specialized Industrial Cluster, and you see why our kits end up in toolboxes worldwide. In the end, an O‑ring kit is just a box of rubber rings — until you need one. Then it’s the difference between a stalled line and a job finished before lunch.

Minimum Order: 1000

A few years ago, I visited a wind turbine gearbox manufacturer. Their equipment had been running for less than three months when the main shaft oil seals began to seep. We pulled one out on site, and the lip had already hardened and cracked. The cause was obvious: the wrong material. They had used standard NBR, but the gearbox ran at high speed, high temperature, and in oil with chemical additives. That combination was simply too much for the material to handle. In industries like pumps, motors, gearboxes, engines, industrial machinery, robotic arms, industrial robots, energy equipment, construction machinery, wind power, metallurgy, chemical processing, hydraulic systems, agricultural machinery, water treatment, marine vessels, high-speed rail, trains, aircraft, automobiles, and heavy trucks, the material you choose for a shaft oil seal often determines how long it lasts—and how smoothly the equipment runs. Matching Material to the Job The most expensive material isn’t necessarily the best. The right choice is the one that fits the job. · NBR (Nitrile Rubber) – Good with mineral oils, cost-effective, fine for medium- and low-temperature, moderate-pressure work, but vulnerable to heat and ozone. · FKM (Fluoroelastomer) – Handles high temperatures and aggressive chemicals, ideal for high-speed, high-heat, complex media environments like chemical pumps or turbochargers. · VMQ (Silicone Rubber) – Stays flexible in extreme cold, good for equipment facing wide temperature swings, but not the most wear-resistant. · HNBR (Hydrogenated Nitrile) – Outperforms NBR in oil, heat, and ozone resistance, suited for tough hydraulic systems and heavy-duty machinery. · PTFE (Polytetrafluoroethylene) – Low friction, excellent chemical resistance, works in high-speed, dry-running, or corrosive conditions, but the lip is fragile during installation. Beyond the medium and temperature, you have to think about pressure and surface speed. High-pressure setups demand materials with low compression set. High- speed shafts need materials that can resist wear and shed heat effectively. Installation – The Overlooked Factor I’ve seen plenty of cases where the material was right, but the seal still failed early because of how it was installed: · Shaft surfaces too rough, wearing the lip prematurely; · No guide sleeve during assembly, nicking the sealing edge; · No lubrication before startup, causing instant dry-running damage. At DEDE, our full-cycle customization service includes installation advice, and sometimes even on-site support, to help customers avoid these preventable mistakes. FAQ Q1: Can you ship standard sizes immediately? A1: Yes. We keep a wide range of O-rings and oil seals—over ten thousand specifications—in stock. Standard parts can ship the same day for urgent orders. Q2: How long for custom parts? A2: From material selection and design to production and testing, we control the whole process. Lead times are predictable, and urgent jobs can be prioritized. Q3: How do I reduce after-sales issues? A3: We recommend materials based on real operating conditions and fine-tune designs to reduce early failures. That means fewer warranty claims and happier end-users. After thirty years in this business, I’ve learned that choosing the right material for a shaft oil seal isn’t just a technical decision—it’s a business one. The right choice keeps equipment running, reduces downtime, and builds trust with customers. At DEDE, we aim to share that experience with every partner we work with, so their machines spend more time earning and less time waiting for repairs.

Minimum Order: 1000

Application Softwall abrasion resistant hose designed for the delivery of steel shots, sand, etc. Tube:Black, smooth, synthetic rubber Reinforcement:High strength synthetic cord Cover:Black, smooth(wrapped finish), abrasion resistant Optional Request:ISO 3861

Minimum Order: 1000

Application FDA approved food hose designed for the delivery of fatty foods such as milk,edibleoil,daily products etc. Tube :White,smooth,NBR food quality rubber. Reinforcement :High strength synthetic cord and helix wire. Cover:Red,smooth(wrapped finish),synthetic rubber, weathering resistant. Optional Request :Standard F.D.A.Title21,177,2600 Corrugate(wra -pped finish).

Minimum Order: 1000

Application Softwall hose designed with ultra-high molecular weight polyethylene tube,excellent in handing a wide range of chemicals,petroleum products and oils. Tube:White,smooth,Ultra High Molecular Weight Polyethylene (UHMWPE) Reinforcement:High strength synthetic cord and helix wire. Cover:Blue,smooth(wrapped finish) or corrugated surface ,EPDM rubber, resistant to chemical,weathering and ozone

Minimum Order: 1000

Inner tube: Black, oil-resident synthetic rubber(Nitrile) Reinforcement: Four alternating layers of spiraled, high-tensile steel wire. Outer tube: Black, oil, abrasion and weather resistant, synthetic rubber. Application: Extremely high pressure and high impulse hydraulic applications.

Minimum Order: 2000

Application:For suction and discharge of petroleum-based products,diesel,gasoline,lubricants,fuel,with aromatic content up to 50%. Tube:Black,smooth,Nitrile rubber Reinforcement:Multi plies high strength synthetic fabric and steel wire helix skeleton Cover:Black, wrapped surface,weather and ozone resistant,synthetic rubber Optional Request:Anti-static wire spiral

Minimum Order: 1000

Inner tube: Tube:Black,smooth,NR,SBR rubber compound. Reinforcement: Multi plies High strength synthetic fibre and helix steel wire Outer tube: Black,smooth,cloth impression,SBR rubber compound Application: Hardwall hose designed for suction and discharge of water,and non-corrosive fluids used in construction sitesand light duty industrial applications.Ideal high pressure water discharge hose for rugged, tough operating conditions

Minimum Order: 1000

Application:Spiral guard is a light weight product that is a cost effective way of producting your hoses and cables from abrasion and impact.Spiral wrap is designed to bundle and/or protect hose and cables from abrasion.Manufactured from tough polythene.It is ultra violet stabilised and is unaffected by most petroleum based products including oil.

Minimum Order: 1000

Inner tube：Internal core in polyamide Reinforcement ：1 or 2 high tensile aramidic braid or steel wire braid Outer tube： pin pricked polurethane high abrasion resistance Safety factor 3:1 Application high pressure airless spray systems,chemical resistance solvents and aggressive fluids

Minimum Order: 2000

Inner tube: True bore PTFE .See Hose Stock Characteristics. Cover/ reinforcement Ture bore one braid of stainless steel braid OR Seamless Convoluted PTFE S316.steel braid Application: Air compressor discharge,hot oil and fluids,hot and greasy environments.

Minimum Order: 2000

nner tube: White,oil resistant, thermoplastic layer. Reinforcement: R7：Synthetic fiber R8：Two layer Synthetic fiber Outer tube: Colorful, oil, abrasion and weather resistant, thermoplastic cover. Application: R7 is medium-pressure hydraulic lines. R8 is high-pressure hydraulic lines.

Minimum Order: 2000

Inner tube: Black, oil resistant, synthetic rubber to High Temperature Reinforcement: Two braids fiber layer. Outer tube: Wrapped Surface Black, oil, abrasion and weather resistant, synthetic rubber. Application: Low-pressure hydraulic lines.

Minimum Order: 1000