11
Adjusting the air precharge pressure
:
- To reduce the air precharge pressure in the vessel, depress the centre of the Schrader
valve to release air pressure. Only release a small amount of pressure at a time and then
the remaining pressure should be checked again. Continue to do this until the correct air
precharge pressure is achieved. If too much pressure is removed, the air pressure must be
increased as per below.
- To increase the air precharge pressure in the vessel, attach a suitable car or bicycle pump
and insert air into the vessel. The pressure should be checked during the process to ensure
the required air pressure is not exceeded.
Mains Static Pressure
Correct Air Precharge
Pressure of Vessel
Pressure
Differential
Pressure Reducing Valve
Maximum Setting
less than 2.0 Bar/200 kPa
Consider a pumped version. Call
PumpWise
for more information
2.0 Bar/200 kPa
0.5 Bar/7.25 PSI
1.5 Bar
2.5 Bar/250 kPa
2.5 Bar/250 kPa
1.0 Bar/14.5 PSI
1.5 Bar
3.0 Bar/300 kPa
3.0 Bar/300 kPa
1.5 Bar/21.75 PSI
1.5 Bar
3.5 Bar/350 kPa
3.5 Bar/350 kPa
2.0 Bar/29.0 PSI
1.5 Bar
4.0 Bar/400 kPa
4.0 Bar/400 kPa
2.5 Bar/36.25 PSI
1.5 Bar
4.5 Bar/450 kPa
note: all pumped versions should have air precharge set to 1.5 Bar/21.75 PSI
Mains Static Pressure Recorded:
.........................
Air Precharge Pressure Adjusted to:
.........................
Pressure Reducing Valve Set to:
.........................
Table 1