Anyone who has worked around rotating equipment knows the story: leaks are only the visible part of the problem. The real trouble often comes from pressure spikes, thermal growth, shaft eccentricity, and contamination—all piling up at the seal interface. The TCN high pressure seal series was designed to hold the line in precisely these conditions: a dual‑lip, spring‑energized, metal‑reinforced architecture that keeps the contact band stable, resists lip rollover and extrusion, and maintains a healthy lubricant barrier under dynamic load.
What makes it work: A balanced architecture for unbalanced loads
· Dual‑lip profile with an auxiliary dust lip: the primary lip retains lubricant under elevated internal pressure; the secondary lip blocks ingress from dirt and moisture—useful when systems see both internal pressure and external debris.
· Spring‑loaded radial control: a garter spring sustains contact pressure as the shaft thermally “breathes” and as wear accumulates, limiting transient leakage events.
· Metal case with elastomeric OD options: steel or stainless reinforcement supplies stiffness; elastomer OD improves bore conformity and tolerance to thermal mismatch and surface roughness variations.
Together, these elements give the TCN high pressure seal series a calm, predictable footprint in conditions where pressure pulsation, low‑speed high‑torque, and temperature excursions come as a package.
Materials, ranges, and the knobs you can turn
· Materials: Nitrile (NBR) and Fluoroelastomer (FKM) cover general oil resistance, high temperature, and aggressive media; cases and springs are commonly carbon steel or stainless, balancing rigidity and corrosion resistance.
· Pressure & speed: engineered for medium‑pressure rotary duty. As a practical guideline, many applications target up to about 0.3 MPa; with conservative speed, good lubrication, and adequate cooling, certain references can be pushed further after case‑by‑case verification.
· Surface & film: a thin, stable oil film is your ally; typical shaft finish targets in the Ra 0.2–0.8 μm range support film formation while limiting boundary wear.
· System fit: pairing correct bore tolerances, interference fit, and runout control with the right lip geometry is often what differentiates a quiet, reliable seal from a chronic dripper.
You will see these “small” decisions add up in pumps, hydraulic drives, and gearboxes—sometimes the difference between routine uptime and recurring service tickets.
Where it belongs: Applications that actually benefit
· Pumps and water treatment: pressurized inlets and housings with rotary shafts that must remain clean and dry.
· Hydraulics: motors, gear and piston pumps, and actuators that see pressure pulsation and low‑speed torque loads.
· Power transmission: heavy‑duty gearboxes and driveline shaft ends with backpressure and oil‑bath lubrication.
· Industrial machinery and robotics: spindles, joint reducers, and automation lines where low leak‑rate and long service intervals matter.
· Construction and agriculture: excavators, loaders, harvesters—the “hot, dirty, pressured” triangle in one place.
· Energy and marine: wind yaw/pitch and main gearboxes, marine propulsion and deck equipment where dust or salt‑spray meets pressure retention.
· Automotive and heavy trucks: transmissions, axles, and driveline seals with
a balanced focus on durability and leakage control.
For extreme edges—very high speed, ultra‑high pressure, or vacuum cleanliness—ask us about specialized or customized builds to avoid over‑ or under‑spec’ing.
DEDE Services
· Rapid shipment for standard parts: extensive inventories across O‑rings, shaft seals, and pressure seals enable quick turns for urgent maintenance windows.
· End‑to‑end customization: from compound selection and lip geometry optimization to pressure and thermo‑mechanical testing, we build non‑standard seals around your operating envelope.
· Engineering that improves systems: with more than three decades in sealing, we help refine leakage paths, cooling and lubrication strategies, extend maintenance intervals, and reduce downtime cost.
You’ll find the approach, examples, and context on our site, and you can reach the team directly to discuss particulars.
Why work with us
We manufacture under one roof with traceable R&D, tooling, machining, and testing. Long practice in sealing has shaped a broad, platformed catalog and healthy stock positions to keep lead times under control. Our solutions serve customers in more than 80 countries and regions, and experience from long‑running programs with well‑known brands feeds back into both standard ranges and tailored builds. We operate with recognized provincial‑level innovation credentials and specialized enterprise qualifications, collaborating across our industrial cluster to keep delivery and quality steady and auditable.
Lay out the medium, pressure spectrum, temperature excursions, bore/shaft
fit, lubrication and cooling, and then use the TCN high pressure seal series to
close the loop. Choose NBR for general duty, FKM for heat and chemistry, add
stiffness or elastomer OD for extrusion resistance and conformity. If pulsation,
heat, or eccentricity is the headache, hand us the operating picture; our teams
will help turn it into a reliable baseline.
