sealing nuts and screws
■ seals in the thread and below the nut
■ one-piece element, no extra assembly required
seal lock® sealing nuts
an effective seal on bolt-nut fasteners
two problems
■ seal the lock nuts on the adjusting screws of hydraulic components and drives
■ seal the stud bolt nuts on automotive engines where the stud bolt bores are used as oilways
a complete solution for both problems:
■ a leak-proof seal below the nut and in the screw thread
■ high-strength threaded fastening without loss of screw tension
■ repeated assembly
advantages with seal lock® sealing nuts with integrated seal ring
■ one-piece element
■ captive seal ring
■ effective seal against gas and liquids below the nut and in the screw thread*
■ temperature resistance from -40° c to 110° c
■ high torque metal mating surface, seal ring does not cause loss of screw tension
■ secure screw fastening thanks to threading in seal ring
■ five repeat screwing-unscrewing cycles possible
■ integrated polyamide pa11 seal ring providing an ef- fective seal against gas and fluids
■ compact element, low space requirement
■ available in m6 to m16 thread sizes, coarse-pitch and fine-pitch, other sizes and special applications available on request
■ captive seal ring, no more lost parts
disadvantages
■ many components a cap nut
b seal washer 1
c lock nut
d seal washer 2
■ longer assembly times
■ torque loss caused by seal washer 2
■ bulky, high space requirement
* test conditions: hydraulic oil, iso viscosity vg 10 at 250 bar and t = 20°c.
seal lock® sealing screws
the advantages at a glance:
■ effective seal against fluid and gas
■ secure, captive fastener
■ thermal stability from -40° c to 110° c
■ galvanised surface finish also available
■ full tightening torque, no setting required
■ one-piece element, quicker to install
■ suitable for automated feed and installation
■ range of versions, materials and special versions available
seal lock® sealing screws provide a cost-effective solution to the age-old problem of finding an effective seal on screw fasteners. for a long time the conventional solution to this problem has involved extra machining of the ma- ting surfaces under the head, the use of sealing compound, o-rings and other expensive operations on the part to be sealed.
the seal lock® sealing screw provides leading design engineers with a one-piece assembly fastener. the screw provides an effective seal against gas and fluids even under high pressure and can be tightened and unscrewed for up to a maximum of five times.
seal lock® sealing screws consist of metal screws of various property classes with the integrated seal ring cap- tured under the head. the seal ring is made from soft polyamide 11 resistant to oils and solvents.
you tighten the seal lock® sealing screw just like you would any other screw. as you tighten the screw, the seal ring is pressed under high pressure into the 90∞ countersink and against the walls of the through bore. this creates a secure, effective seal between the metal mating surfaces. this means that you can dispense with the re-
tightening normally required on screw fasteners where separate seals or spring washers are used. no more re-tightening required.
seal lock® sealing screws are ideal for use in series production. we can supply seal lock® sealing screws de- signed for your operating conditions, design specifications and application. the standard seal lock® sealing screw is available in sizes ranging from m6 to m16 and fine-pitch sizes can also be supplied.
our technical advisory service will be glad to help you with you particular application. the technical advisory ser- vice has a wealth of experience and will be glad to show you samples. all this without any obligation on your part. we are always glad to help.
example applications
■ securing of anchor set screws for electro-magnetic hydraulic valves
■ lock nuts on the tie rods of hydraulic valve blocks
■ locking set screws on steering boxes
详情访问： 429-seal_lock密封螺母.pdf