Xylem e-1531 Series, Инструкция по эксплуатации

Страница: 24 / 36

3. Loosen the rotating assembly from the volute.
WARNING:
Make certain that the internal pressure of the pump is relieved before
you continue. Failure to follow these instructions could result in serious
personal injury or death, or property damage.
4. Remove the seal flushing tube if it is used.
5. Remove the volute capscrews.
6. Remove the rotating assembly and motor from the volute.
7. Remove the impeller capscrew, lock washer, and washer.
8. Remove the impeller.
6.2.4 Remove the mechanical seal (e-1531/e-1532 and e-1531/e-1532-F)
1. Remove the rotating portion of the seal.
If necessary, use a screwdriver to loosen the rubber ring.
2. Remove the seal insert, the insert gasket, and the retainer if it is used.
6.2.5 Remove the seal or packing rings (e-1531/e-1532-S, e-1531/e-1532-D, and e-1531/
e-1532-PF)
1. Remove the hex nuts from the seal cap bolts.
2. For the e-1531/2-PF, remove the hex nuts from the packing gland.
3. Remove the coverplate screws.
4. Remove the coverplate from the bracket.
5. Remove the seal assembly or packing rings.
6.2.6 Impeller trimming guidelines
Machining
When it is necessary to reduce the pump flow rate and generated head by trimming the
impeller diameter, the following guidelines apply for stainless steel impellers:
• Review the pump hydraulic selection data and consult your local Xylem representative
to select the proper reduced diameter.
• For the e-1531 or e-1532 4AD model, before trimming the impeller refer to the 4AD
angle cut guidelines.
• For machining recommendations, see P2002535 Stainless Steel Impeller Trimming
Guidelines.
Balancing
It is recommended that impellers trimmed more than 5% in diameter be rebalanced per
ISO 1940 grade G6.3.
Angle cut guidelines
Model e-1531 and e-1532 4AD pump impellers must be angle cut at reduced diameters
according to the following information.
6 Maintenance
22 Series e-1531 and e-1532 INSTRUCTION MANUAL