Description
The DEF rotary cap seal is a bi-directional seal for use in pneumatic and low to medium duty rotary or oscillating applications. The rotary piston seal is a two piece design comprised of a standard size O-Ring energizing a wear resistant PTFE cap. The rotary piston seal offers long wear and low friction without stick-slip. This PTFE outer diameter is designed with a special interference wiht the o-Ring to eliminate spinning between the o-ring and seal. Special grooves are designed into the PTFE inner diameter to provide lubrication and create a labyrinth effect for reduced leakage. The seal is commonly used in swivel joints, hose reels and machine applications.

Application Range
Pressure [MPa] 30
Temperature [° C] -35...+200
Sliding speed[m/s] 2
Medium: Mineral oil based hydraulic fluids, barely flammable hydraulic fluids, water, air and others.

Material
O ring NBR / FKM (Special on request)
Slide ring: PTFE-Bronze / PTFE-carbon
(Special on request)

Application
Mobile hydraulics
Standard cylinders
Machine tools
Injection moulding machines
Presses

How to order from us?   
1. Contact DEF's salesman to get a quotation.( by Email, Telephone, Trademessage)
2. Send DEF your asked type and detailed instruction(mateials, size, quantity,color, special  requestes etc.)
3.  Will send price and Other details informations to you,send back Purchaser Order for approval
4.  After confirm order and timeline, DEF'll start production procedure once receive payment.
5.  If require sample, please inform DEF in advance.
6.  5~10 working days for making seals.
7.  Quality Checking, DEF can send bulk order photo for approval before packing, if you need.
8.  Packing
9.  Order release for shipping.
10. Any issue,please contact DEF after receive package. DEF'll invest and consult with you for  solution.
11. Quality and Service are  DEF principle.
 
Please feel free to contact us if you need more details about our factory and products.