The revised injection screw has an optimized shaft seal
at the end of the shaft in front of the screw coupling to reduce the risk of silicone leaking out toward the screw drive.
Below the blade shaft, the TLD features a shaft seal
that self-compensates for wear.
Conventional PTFE shaft seal
rings soon reach their limits at high rotational speeds and pressures, which typically leads to leaks and other seal failure modes.
In its standard size, the shaft seal
tolerates a deflection of [+ or -]4 mm without a decline in its performance.
The type of housing, venting, lubrication and shaft seal
are all critical components of a washdown gear reducer, and these features should be carefully evaluated before selecting a gear reducer for a food industry application.
The new generation of radial shaft seal
rings has the capacity to follow relatively severe deformations of main bearings and shafts, basically by providing stronger compensating movements.
At the heart of the system is the centrifugal pump, which generates laminar flow and features an upgraded silicon-carbide shaft seal
. Compared --to traditional ceramic seals, the new seal represents a considerable advancement in resiliency when subjected to the highly abrasive elements present in mud mixing.
The extra safety the magnetic coupling provides is important in explosive atmospheres: without shaft seal
rings, it is impossible for media inside the pump to escape out through faulty shaft seal
For example, Freudenberg-NOK Sealing Technologies (fnst.com) has developed a polytetrafluoroethylene (PTFE) radial shaft seal
for engines that is smaller--requiring a minimum installation height 50% less than that required for conventional radial shaft seals--and 40% lighter than traditional seals.
The application required that the mill be designed with a shaft seal
for grinding under inert gas.