Operating Manual
The seal consists of two rotary faces which are
sealed to the shaft by 'O' rings. Rotation is
provided by socket set screws which tighten
onto the shaft. The two stationary faces are
located in the rotorcase and seal housing bores.
Rotation is prevented by pins and cast lugs.
Wave spring(s) provide a face to maintain face
to face contact. As seal housing attached to
the rotorcase encloses and sets the seal.
Seal faces are brittle.
Take extreme care when handling.
Removing the Double Mechanical Seal
1. Using the flushing holes loosen each of
the socket set screws.
2. Remove the seal housing retaining nuts
and pull back the seal housing away from
the rotorcase.
3. Carefully remove the rotorcase with the
stationary face still fitted.
4. Slide the rotary faces off the shaft followed
by the seal housing with remaining
stationary face.
Description
Stationary Face 'O' Ring
Stationay Face
Rotary Face
Shaft 'O' Ring
Wave Spring
Dive Ring
Wave Spring
Shaft 'O' Ring
Rotary Face
Stationary Face
Gasket
Stationary Face 'O' Ring
Seal Housing
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
Rotorcase
Side
Gearcase
Side
Fitting the Double Mechanical Seal
1. Use solvent to wipe the lapped surface of
the seal faces perfectly clean, being
extremely careful not to scratch the faces.
2. Lightly lubricate the 'O' rings and shaft
end with silicon grease (food quality if
necessary).
3. Firmly press on the 'O' rings to the
stationary faces and locate them within
the rotorcase bore and seal housing.
4. Locate 'O' rings into rotary faces.
5. Carefully fit the seal housing with
stationary face onto the shaft.
6. Push the rotary assembly onto the shaft
until it sets against the seal housing
stationary face.
7. Fit new seal housing gasket.
8. Carefully fit the rotorcase and tighten the
seal housing nuts.
9. Tighten each of the seal socket set screws
through the seal housing flushing holes.
Note:- The drive ring chamfer must
be on the gearcase side of the shaft.
11.3 Double Mechanical Seal
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