Tank overflow 'D' prevents liquid level rising in pump body and damaging the motor. The lower lip of overflow 'D' should not be more than 1/2" above center of pump overflow.
A vertical suction pipe with non-return valve entering top of tank may be used when liquid is free from suspended solids.
Installation 1
- 1 Fully open valve 'A'
- 2 Allow level of liquid to rise in supply tank up to overflow 'D' level
- 3 Close valve 'B'
- 4 Start pump
- 5 Open valve 'B' gradually for required flow
Installation 2
- 1 Close valves 'A' and 'B'
- 2 Open valve 'D' until liquid flows out of 'C'
- 3 Start pump and immediately open valve 'A' fully
- 4 Close valve 'D'
- 5 Open valve 'B' gradually for required flow
Valve 'A' must be at least 1/2
size large in bore than suction pipe
Installation 3
- 1 Close valves 'A' and 'B'
- 2 Open valve 'D'
- 3 Fill priming vessel to overflow 'C'
- 4 Start pump
- 5 Open valves 'A'
- 6 Close valve 'D' and open valve 'B' for flow required
Installation 4
- 1 Close valve 'A' and 'B'
- 2 Fill priming vessel
- 3 Start pump
- 4 Open valve 'A' gradually until fully open
- 5 Open valve 'B' gradually for required flow
Installation 5
- 1 Close valves 'A' and 'B'
- 2 Open valve 'D'
- 3 Fill priming vessel to overflow 'C'
- 4 Start pump
- 5 Open valves 'A'
- 6 Close valve 'D' and open valve 'B' for flow required
Installation & Operation
Application Scenarios:
- Where Low Level priming is not required
- Where Low Level priming is required
- Where priming at all levels is required
- Where priming at all levels is required without re-circulation
- For deep variable head storage tanks
Installation Requirements:
- Straight overflow from pump to supply/priming vessel
- No restrictions (valves etc.)
- Slope down -1 in 20 or more
- Preferably 12" long maximum
- Valves 'A' to be of the free flow type
