SELWOOD SELTORQUE S150, Manual

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Selwood Seltorque S150 Manual
10
7. After completing Instructions 5 and 6 of this
Section, check that the peel valve rubber is
capable of closing all of the air holes in port plate
(B03) when operating rod (B13) is square to the
plate and fully lifted.
8. Check condition of bush (B07) in upper diffuser
B06) and replace, together with clip (B08) and
nitrile washer (B37), if significantly worn.
NOTE: The operating rod (B13) is normally a slack fit
in the bush.
9. Position port plate sub-assembly on upper diffuser
(B06), fit washers (B05) after checking that they
will seal efficiently and fully tighten screws (B04).
Reassemble nut (B12) and screw float (B11) on to
operating rod and tighten securely in accordance
with Section 5.2.1 Float (B11) Instruction 5.
10. Recheck operation of peel valve rubber (B21) to
ensure that it fully covers air ports in plate (B03)
when the float is located in the upper diffuser
cone. In this position there should be a gap of
3.5 mm between the heads of the centre clamp
bar screws (B16) and the operating plate (B15). If
the dimension is incorrect, adjust position of float
on operating rod.
11. Examine condition of gasket (B02) and renew, if
necessary, before installing between port plate
(B03) and separator cap (B01). Fit spring
washers (A12) and screws (A11) each of which
should be sequentially turned a small amount until
fully tightened. Gasket (B02) must be evenly
compressed.
12. Replace separator cap sub-assembly in
accordance with Section 5.2.1 Float (B11)
Instruction 6.
5.2.3 Deposits of Solids
†‡
When handling liquids containing solids capable of
adhering to product wetted surfaces, it is advisable
periodically to check the valve system in the separator.
To inspect and service, proceed as follows:
1. Remove separator cap sub-assembly in
accordance with Section 5.2.1 Float (B11)
Instructions 1 and 2, allowing separator body
(B22) together with lower diffuser (B24), to be
lifted off the suction tube (B27).
2. Remove any deposits of scale from lower diffuser
(B24) and check condition of welds securing its
circular bottom to the perforated cylinder.
Remove any solids that may have accumulated in
the suction tube (B27), renew gasket (B25) and
reposition separator body/lower diffuser assembly
on suction tube.
3. Remove deposited materials from surfaces of
upper diffuser (B06) and note, in particular,
condition of welds securing cone and disc to
perforated diffuser body. Also examine diffuser
†
Use lower Diffuser (Part No. 00-15-038100) for sludge
handling duties. This is recognised by holes in the base as
well as around the side.
‡
Use lower Diffuser (Part No. 00-15-038000) for other
applications where no solids are present which can adhere to
the internal surfaces.
bush (B07) and operating rod (B13), and replace if
significantly worn in accordance with Section 5.2.2
Peel Valve (B21) Instructions 3 to 11. Remove all
deposited solids that would interfere with the free
movement of the mechanism, obstruct the
passage of air across the port plate holes, or
inhibit the flow of water (through the holes in the
upper diffuser, for example).
4. Once it is established that all components are in a
satisfactory condition and are free from scale,
replace
separator cap sub-assembly in
accordance with Section 5.2.1 Float (B11)
Instruction 6. Any re-assembly work carried out
on the peel valve assembly should be in
accordance with Section 5.2.2 Peel Valve (B21)
commencing Instruction 1.
The fabricated separator chamber (B35) (Part No.
0015105100 is normally utilized when the pump is
fitted with Twin Prime where the larger volume allows
better separation of air from the pumped liquid.
The two top fixings attaching the separator chamber
(B35) to the pump body (C09) are located inside the
chamber necessitating (B36) M12 dome nuts and
spacer washers to protect the stud threads.
5.3 Impeller, Mechanical Seal and
Delivery Valve Maintenance
5.3.1 Impeller (C04)
Generally speaking, it is only necessary to remove the
impeller if the existing component has become
severely abraded, or if access to other rotating parts is
required.
To remove and replace, proceed as follows:
1. Remove air hose item (A01), twin prime item
(A39) and (A40) from separator cap (B01), after
loosening relevant hose clip (A02).
2. Remove nuts (A11) and washers (A12), and lift off
separator cap (B01) complete with peel
valve/upper diffuser assembly, (B01) to (B21)
inclusively.
3. Lift separator body (B22) complete with lower
diffuser (B24) off suction tube (B27) or (B35)
allowing (dome) nuts (B36) or (B29) and spring
washers (B39) or (B30) to be released.
4. Withdraw suction tube (B27) or (B35) and gasket
(B28) after removing nuts (B29) and associated
spring washers (B30).
5. Drain oil from flushing chamber by removing filler
cap assembly (D08) and drain plug (D34). The
condition of the oil will indicate whether or not the
mechanical seal has been functioning correctly. If
contamination is evident, the mechanical seal
must be replaced in accordance with Section 5.3.2
Mechanical Seal (C08).
6. Remove impeller screw (C01) and washers (C02)
and (C03), and withdraw impeller (C04) from drive
shaft (D17). To remove the screw, it will be
necessary to lock the impeller by means of a
wooden block wedged between the impeller
blades and pump body (C09).