Stager Operation
Stagers are motor driven, rotary multi-port valves used to
control a set of valves in a predefined sequence. They function
by internally connecting inlet pressure to a defined set of
control ports and allowing other control ports be vented through
a drain. Control ports are used to open and close valves in a
preset sequence. As the stager advances to various positions,
different valves are open and closed in a system. The control
port pressure and vent sequence is preset at the factory and
cannot be field altered.
Stager Installation
1. Connect a constant pressure water or air source to the 1/8"
NPT stager inlet. Control fluid pressure must be equal to or
greater than system pressure. To ensure long trouble free
operation, a 100 micron filter in the control pressure line is
recommended.
2. Stager drain port should be left open or discharged to
unrestricted or open drain. DO NOT plug or restrict drain
port.
3. Connect the 1/8" NPT control ports to appropriate valves.
Refer to tubing schematic provided in the Plumbing
Diagrams section of this manual. Tubing inside diameter
should be 1/8" or larger.
Inverted Type Stagers
Stagers that are ordered inverted would be used on systems
with all normally closed valves. Inverted Stagers send pressure
signals to open valves and vent signals to close valves.
PLUMBING DIAGRAMS
4 Position Softener (48-00 Stager)
Optional Hard
Water Bypass Valve
Note A: All valves normally open except optional valve 2A.
Note B: Inverted Stager types will have these ports pressurized.
Inverted Stager to be used with all valves normally closed except
optional valve 2A.
A
B
Drain Line Flow
Control not shown
Filter Operation Using 48-00 Stagers
When using a 48-00 Stager to operate a filter:
1. Plug stager port #5 using a 1/8" pipe plug
2. Program cycle 2 time to 0:00:00 or the desired settle time
NXT Stager Controller AU11