High Temperature VB Rubber Oil Seal
Industrial-Grade High-Temperature VB Rubber Oil Seal Specification
Designed for continuous high-temperature operation on rotary shafts, High-Temperature VB Rubber Oil Seals maintain radial lip contact where standard nitrile (NBR) components harden and fail. Engineered for industrial machinery, gearboxes, pumps, and compressors, these seals prevent lubricant leakage and thermal degradation under elevated operating temperatures.
Technical Performance & Material Specifications
Continuous operating limits and material capabilities are dictated by elastomer formulation. The compound must be selected based on operating media, shaft surface speed, and thermal exposure.
|
Material |
Continuous Temperature Range |
Short-Term Peak |
Primary Resistance Profile |
|
FKM (Viton) |
-20°C to +200°C |
Up to 230°C |
Synthetic oils, aggressive chemicals, high oxidation resistance |
|
HNBR |
-40°C to +150°C |
Up to 170°C |
Hot petroleum oils, high mechanical wear resistance |
|
Silicone (VMQ) |
-60°C to +200°C |
Up to 230°C |
Extreme low/high temperatures, dry heat, air environments |
Core Mechanical Properties
Low Compression Set: Formulated to resist permanent deformation under continuous mechanical load at high temperatures, ensuring constant radial lip pressure against the shaft.
Thermal Aging Resistance: Compounds withstand heat oxidation and ozone exposure, preventing surface micro-cracking and hardening that cause premature oil bypass.
Friction & Speed Management: Optimized sealing lip geometry minimizes contact friction, reducing running temperatures and shaft sleeve wear at medium-to-high rotational speeds.
Physical Construction & Quality Control
Sealing Lip: Precision compression or injection-molded edges ensure uniform lip thickness, stable concentricity, and consistent fluid retention.
Metal Reinforcement Case: Embedded carbon steel or stainless steel structural ring provides high housing retention force and prevents installation distortion.
Traceability, Inspection & Standards: Each production batch undergoes dimensional verification (inner/outer diameter, lip thickness), hardness testing (Shore A), and visual surface inspection. Material test reports are maintained from raw compound mixing to final packaging, fully backed by strict international manufacturing and quality standards (ISO, RoHS, and REACH compliance).
Application Scope & Media Compatibility
Recommended Industries:
Industrial gearboxes and heavy-duty transmissions
Centrifugal and industrial pumps
Air compressors and electric motors
Mining, agricultural, and construction equipment
Manufacturing & Supply Options
Dimensions: Available in standard metric/inch dimensions as well as custom sizes built to technical drawings or sample specifications.
Spring Options: Carbon steel or corrosion-resistant stainless steel garter springs.
Packaging: Industrial bulk packaging, individual protective bagging, or private-label export boxes designed to safeguard the sealing lip from transport deformation.
FAQ
Q: What makes a High Temperature VB Oil Seal different from a standard NBR oil seal?
A: High Temperature VB Oil Seals use heat-resistant elastomers such as FKM, HNBR, or Silicone, allowing them to maintain elasticity and sealing performance at temperatures where standard NBR seals typically harden, crack, or lose sealing efficiency.
Q: Which material is best for continuous temperatures above 180°C?
A: FKM is generally the preferred material for continuous operation around 200°C due to its excellent resistance to heat, oxidation, fuels, and synthetic lubricants. The final material selection should also consider the operating media and shaft speed.
Q: Can these seals be used with synthetic oils?
A: Yes. FKM compounds are compatible with most synthetic lubricants, engine oils, transmission fluids, and many industrial oils. Material compatibility should always be verified for specific chemicals.
Q: Do you provide custom sizes?
A: Yes. We manufacture both standard and non-standard dimensions based on customer drawings, samples, or technical specifications.
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