DMHUI BAKHDSN High Pressure Composite Material Shaft Seal – PTFE+NBR (27x35x6mm)

Engineered for high-pressure hydraulic systems, this BAKHDSN-type oil seal combines advanced materials for superior performance. Featuring a PTFE-lined sealing lip bonded to an NBR elastomer body, it delivers low friction, excellent chemical resistance, and reliable sealing in demanding Danfoss pump applications. With a 27mm shaft, 35mm bore, and 6mm width, this seal is a direct replacement for Sauer Danfoss hydraulic pump assemblies.

Key Points

Advanced PTFE+NBR Composite Construction: The seal combines a low-friction PTFE sealing lip with a durable NBR elastomer body. This unique material pairing provides the chemical and temperature resistance of NBR with the friction-reducing properties of PTFE.

Exceptional Pressure Capability: The BAKHDSN design is specifically engineered for high-pressure hydraulic applications. The reinforced lip geometry maintains sealing integrity under extreme system pressures commonly found in Danfoss pump installations.

Low Friction & Reduced Heat Generation: The PTFE sealing lip significantly reduces friction compared to conventional rubber seals, minimizing heat generation and allowing reliable operation across a wider range of shaft speeds.

Precision Fit for Danfoss Systems: Manufactured to exact 27x35x6mm specifications, this seal is a direct replacement for Sauer Danfoss hydraulic pump applications.

Metal Insert for Structural Integrity: An integrated metal insert provides dimensional stability and pressure resistance, ensuring the seal maintains its shape and sealing force under high-pressure conditions.

Product Info

Product Name: BAKHDSN Oil Seal 27×35×6mm
Seal Type: BAKHDSN
Material: PTFE + NBR Rubber
Shaft Diameter (ID): 27mm
Housing Bore (OD): 35mm
Width: 6mm
Primary Application: Hydraulic Pumps & Motors
Application Reference: Danfoss hydraulic pump components
Package includes: 1 x BAKHDSN Type PTFE NBR Rubber Oil Seal (27x35x6mm)

Understanding BAKHDSN Seals & The PTFE+NBR Advantage

BAKHDSN is a specialized high-pressure seal designation. The BAKHDSN profile is an advanced technical sealing design offering enhanced performance compared to basic solutions.

The PTFE+NBR composite construction represents a significant advancement over standard single-material seals:

PTFE (Polytetrafluoroethylene) Sealing Lip: Provides exceptionally low friction, excellent wear resistance, and allows higher shaft speeds compared to conventional rubber seals. PTFE also offers outstanding chemical resistance and dimensional stability.

NBR (Nitrile Rubber) Body: Offers excellent resistance to hydraulic oils, greases, and moderate temperatures, maintaining flexibility and providing a secure static seal against the housing bore.

Metal Insert: Provides structural reinforcement and pressure resistance, preventing deformation under high system pressures.

This composite design is commonly specified for demanding hydraulic applications where reliability and reduced maintenance downtime are critical.

FAQ

Q: Does this seal include a dust lip?
A: No. The BAKHDSN profile doesn't include a dust lip. The dust lip seal needs to be purchased separately.

Q: Why use PTFE instead of a conventional rubber sealing material?
A: The PTFE sealing lip provides significantly lower friction, better wear resistance, and allows higher shaft speeds compared to conventional rubber seals. This reduces heat generation and extends service life in demanding hydraulic applications.

Q: What is the role of NBR in this seal?
A: NBR provides flexibility and helps the sealing assembly maintain proper contact with the shaft and housing. It is also commonly used with hydraulic oils and lubricants.

Q: How do I install this seal correctly?
A: Clean the shaft and housing bore thoroughly. Inspect the shaft for wear or scoring. Apply a thin film of clean hydraulic oil to the seal lip. Use a flat installation tool that contacts the outer metal case evenly. Press the seal squarely into the housing bore. The dust lip side should face the external environment.

Q: Is this an original Danfoss part?
A: No, this is a high-quality aftermarket replacement manufactured to match OEM BAKHDSN specifications for fit, material, and performance.

Note: This product is an aftermarket replacement component. Always verify the dimensions and seal type from your original seal or equipment manual prior to purchase. The PTFE+NBR composite construction offers superior performance in high-pressure hydraulic applications. Proper installation is essential for optimal sealing performance.

Trust in quality, choose DMHUI
The DMHUI BAKHDSN 27×35×6mm Oil Seal combines PTFE and NBR materials in a compact sealing design for hydraulic pumps, motors, and other rotary shaft applications. Its precise dimensions and material combination make it a practical replacement option for compatible hydraulic equipment.