Optimizing Seal Performance With Expert O Ring Series From DEDE

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 pieces

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