Type 159 A
PTFE (graphite) wedge
Independent of the direction of rotation
L1KUdimensions with stationaries DS 1 and DS 2
DYNAMIC,unbalanced mechanical seals are produced for general applications. OEMs often buy this type of seal in large quantities. Whether the one or the other version is selected depends on the OEM’s preferences or on the conditions of use or installation at the customer end.
It is important to know that a dynamic mechanical seal with O-ring can damage the shaft surface with its axial movements. Such a seal should only be used therefore with shaft sleeves.
It is easier to position mechanical seals when there are steps on the shaft sleeve, rotor or the like which can serve as locating shoulders. If this is not possible you can use locating rings with set screws against the shaft / sleeve.
Preference should be given to stationary faces which have elastic bearings to cushion shocks and vibrations from the equipment as far as technically possible.
For the various stationary gland types and sizes on the market, DEPAC offers a series of single seals – like this one – without stationaries.