CPK
Fig. 9 : Stufing box arrangement of CPK Y Pumps.
Table No. 3
See section 5.4.3 for corelation between pump and bearing
bracket sizes.
5.3.2 Reassembly of Mechanical seal
Mount the mechanical seal as described in the instructions of
seal manufacturer. The following points should be observed
when mounting the mechanical seal :
Extreme care and cleanliness during assembly are the
essential prerequisites for the trouble free operation of the
mechanical seal.
The guard protecting the sealing faces should only be
removed only at the time of its fitment before assembly.
When the stationary seal ring has been inserted, check its
plane parallelism in relation to the casing cover. The surface
of the shaft protection sleeve must be absolutely clean and
smooth and mounting edge of the sleeve must be chamfered.
When slipping the rotating assembly of the seal on to the
shaft protection sleeve take suitable steps to protect the
surface of the shaft protection sleeve against damage.
Before final mounting in the pump, the rubbing faces of the
mechanical seal should be wetted with a drop or two of silicon
oil. In the case of pumps equipped with a double acting
mechanical seal, the mechanical seal compartment must be
properly vented and pressurized to the correct pressure
specified in the installation drawing (it should remain under
pressure even when the pump is stopped).
The supply of quench liquid must remain turned on even when
the pump is stopped.
Bearing Dimensions of Cross Packing
bracket Packing compart- Section rings
ment in mm. packing
in mm.
Ø di Ø da L
P25/62 35 51 53 8 x 8 4 rings and
P35/80 45 65 64 10 x 10 1 lantern
P45/120 55 75 64 10 x 10 ring or
P55/140 70 95 79 12.5 x 12.5 6 rings w/o
P65/160s 80 105 79 12.5 x 12.5 lantern ring
Fig. 8 Stuffing box dimensions
7
5.4 Cooling / Heating
Clean, clear and non-aggressive water is recommended for
cooling. Recommended pH value is 7.
Cooling to stuffing box :
Please follow the instruction given in point no. 3.1.2.3.
Sealing liquid / cooling of stuffing box gland :
For stuffing box with packings, clean solid free liquid at a
pressure of 1 bar above the pressure in stuffing box and at a
flow rate of 2-3 lpm is recommended.
Pressure (maximum) : 6 bar
Recommended temperature : 10
0
C to 30
0
C.
Cooling to bearing bracket :
No cooling shall be given to the bearing bracket up to a working
temperature of 200
0
C.
For working temperature > 200
0
C, use following data :
Cooling water qty. : 3 lpm.
Pressure (max.) : 10 bar
Recommended temperature : 10
0
C to 30
0
C.
Cooling to Pedestal
In case of centre feet mounted CPK Pumps, cooling to pedestal
is recommended for working temperature above 250
0
C. The
cooling can be arranged in parallel or in sereis with the bearing
bracket.
Cooling water qty. :
In series with the bearing bracket (e.g. API Plan G) : 5 lpm.
In parallel with the bearing bracket (e.g. API plan G1) : 3 lpm
Pressure (max.) : 6 bar
Recommended temperature : 10
0
C to 30
0
C
Heating
The space between casing cover and bearing bracket can
also be used for heating by hot water, steam or any other
suitable heat transfer media.
Maximum temperature : 183
0
C
Maximum Pressure : 10 bar.
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