3.4.2 Pump and impeller data
Maximum soft solids in suspension*
Maximum ambient temperature*
Pumped liquid temperature limits*
- 20 to + 120 ºC (- 4 to + 250 ºF)
- 20 to + 40 ºC (- 4 to +104 ºF)
up to 3 % by volume (refer for size limits)
Maximum pump speedrefer to the nameplate
*Subject to written agreement from Flowserve.
UB USER INSTRUCTIONS ENGLISH 71569247 07-04
3.3.5 Bearing housing
Two grease nipples enable grease lubricated bearings to be replenished between major service intervals.
3.3.6 Seal housing
The design enables one of a number of sealing options to be fitted.
3.3.7 Shaft seal
The mechanical seal(s), attached to the pump shaft, seals the pumped liquid from the environment. Gland packing may be fitted as an option.
3.3.8 Driver
The driver is normally an electric motor. Different drive configurations may be fitted such as internal combustion engines, turbines, hydraulic motors etc driving via couplings, belts, gearboxes, drive shafts etc.
3.3.9 Accessories
Accessories may be fitted when specified by the customer.
3.4 Performance and operating limits
This product has been selected to meet the specifications of your purchase order, see section 1.5.
The following data is included as additional information to help with your installation. It is typical, and factors such as temperature, materials, and seal type may influence this data. If required, a definitive statement for your particular application can be obtained from Flowserve.
3.4.1 Operating limits
®
3 PUMP DESCRIPTION
3.1 Configurations
The 8-UB-1pump is a horizontal split casing two stage volute type centrifugal pump designed for water works, drainage, general service and circulating applications. It can be used with motor, steam turbine and gasoline or diesel engine drive.
It has the following horizontal configuration:
3.2 Name nomenclature
The pump size will be engraved on the nameplate typically as below:
8-UB- 1
Nominal discharge branch size
Configuration – see 3.1 above
The typical nomenclature above is the general guide to the UB configuration description. Identify the actual pump size and serial number from the pump nameplate. Check that this agrees with the applicable certification provided.
3.3 Design of major parts
3.3.1 Pump casing
The pump has its main casing gasket axial to the shaft allowing maintenance to the rotating element by removing the top half casing. Suction and discharge branches are in the bottom half and therefore remain undisturbed.
3.3.2 Impellers
The impellers are fully shrouded and may be fitted with optional hub rings.
3.3.3 Shaft
The large diameter stiff shaft, mounted on bearings, has a keyed drive end.
3.3.4 Pump bearings and lubrication
Ball bearings are fitted as standard and may be either oil or grease lubricated.
| Impeller | Nominal | Mean |
Pump | minimum | wear | radial |
size | passage | ring | wear ring |
| size | diameter | clearance |
| mm (in.) | mm (in.) | mm (in.) * |
8-UB-1 | 17.5 (0.69) | 266.7 (10.5) | 0.19 (0.0075) |
*May be up to 0.13 mm (0.005 in.) larger if casing ring and impeller have a tendency to gaul.
| Nominal diaphragm | Mean radial |
Pump | bush diameter | bush clearance |
size | mm (in.) | mm (in.) |
8-UB-1 | 127 (5) | 0.11 (0.0045) |
