Pentair Siata V132 SFE, Installer Manual

Page: 42 / 88

Installer manual Siata V132 - SFE - Installation
42 / 88 Ref. MKT-IM-003 / B - 19.04.2017
5.8.2. Automatic Bypass
The automatic proportional bypass accessory enhances the system with following functions when
fitted upstream of the water treatment system:
•
Supply of untreated water during regeneration cycle 4C. In this cycle the valve does not provide
hard water bypass during the regeneration.
• If there is a temporary increase of the water consumption the pressure drop inside the valve and
through the resin bed increases substantially. In this situation, due to the differential pressure
that has been created from inlet and outlet sides of the bypass, the automatic bypass valve opens
to balance the outlet pressure with the inlet pressure ensuring a higher flow rate at the outlet.
But of course in that case an intermediate hardness is obtained during part of the service cycle.
• Disconnection of the valve or the entire water treatment system without causing a break in the
supply of water. In that case only raw water is available for the user.
Inlet Outlet Inlet Outlet
Inlet Outlet Inlet Outlet
Valve
Valve
Valve
Valve
Service operation
Regeneration. Automatic valve open
for raw water bypass
Bypass position
Service operation with high pressure
drop (automatic valve open)