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AEC/Appllcatlon Engineering
Prior to installing the rotating portion of the mechanical seal, prepare and organize the rotor
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shaft, head and idler assemblies, and appropriate gaskets for quick assembly.
Once the rotating portion of the mechanical seal is installed on the rotor shaft, you must
assemble the parts as quickly as possible to insure that the seal does not stick to the shaft
in the wrong axial position. You can expect the seal to stick to the shaft after several
minutes setting time.
Never touch sealing faces with anything except clean hands or a clean cloth. Minute
particles can scratch the seal faces and cause leakage.
3. Coat the idler pin with non-detergent SAE 30-weight oil. Place the idler and bushing on the
idler pin in the head.
4. Clean the rotor hub and bracket seal housing bore. Make sure both are free from dirt and
grit. Coat the outer diameter of the seal seat and the inner diameter of the seal housing bore
with non-detergent SAE 30-weight oil.
5. Start the seal seat in the seal housing
bore. Refer to the following figure.
If
force is necessary, protect the seal face
with a clean cardboard disc and gently
tap it in place with a piece of wood.
6. Place the tapered installation sleeve on
shaft. Refer to the figure on the
following page. Coat the rotor shaft.
tapered installation sleeve, and the inner
diameter of the mechanical seal rotary
member with a generous amount of
non-detergent SAE 30-weight oil.
Petrolatum may be used, but grease is
not recommended.
7. Place the seal spring on the shaft against
the rotor hub. Refer to the figure on the
following page.
COAT SEAL SEAT AND SEAL HOUSING BORE
WITH NON-DETERGENT SAE 30 WEIGHT
OIL BEFORE ASSEMBLY.
BRACKET
SEAL SE.AT
BRACKET BUSHING
LUBRICATION GROOVE
IN 6:00 O"CLOCK POSITION
8. Slide the rotary member, lapped contact surface facing away from the spring, over the
installation sleeve on the shaft until it is against the spring.
Do not compress the spring.
9. Coat the rotor shaft with non-detergent SAE JO-weight oil. Start the end of the shaft in the
bracket bushing and turn it from right to left, slowly pushing until the ends of the rotor
teeth are just below the face of the casing.
Leave the rotor in this position. Withdrawal of the rotor and shaft may displace the carbon
seal rotating face, resulting in damage to the seal.
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TDH TrueTemp"" Serles Hot 011 Temperature Control Units
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