Suction Piping; Pressure Tank - Franklin Electric Inline Constant Pressure System Manuel Du Propriétaire

Incoming Pressure Requirement
The Inline System is designed to operate as low as 3 psi (0.2 bar) at minimum incoming pressures.
When used on a cistern, the incoming pressure requirement is waived, but a water level must be
maintained in the cistern to prevent a vortex from forming.
WARNING
!

Suction Piping

When the pump is located at a distance from the water source, the suction piping may have to be
increased in diameter to reduce friction loss. The friction loss in a system increases:
1. As the flow rate increases
2. As the piping size decreases
Refer to the included Inline System's performance tables (Appendix 1) and friction loss tables
(Appendix 2) to determine the amount of head lost for a given application.
Discharge Pipe Sizes for Installation
When the pump is located at a distance from points of water use, it is necessary to increase the
discharge pipe size in order to reduce friction loss. The friction loss in a system increases:
1. As the flow rate increases
2. As the piping size decreases
Refer to the included Inline System's performance tables (Appendix 1) and friction loss tables
(Appendix 2) to determine the amount of head lost for a given application.

Pressure Tank

NOTE: 1 psi = 0.068 bar
The Inline System needs a small pressure tank placed on the pump outlet to maintain constant
pressure. The tank supplies water while the pump ramps up to speed and in circumstances where
only a small amount of water is required for a short period of time. In addition, the tank prevents
water hammer by acting as a system buffer. This buffer also helps to prevent pressure spikes when
there is a sudden change in demand.
Failure to maintain incoming water may result in heating of water,
personal injury, pump damage and/or property damage.
System Pressure
(at Pressure Sensor)
25
30
35
40
45
50 Factory Setting
55
60
65
70
75
80
Inline Constant Pressure System
Pressure Tank
Setting (±2 PSI)
18
21
25
28
32
35
39
42
46
49
53
56
7