3
INSTRUCTIONS R429d
Dec 2003
MAIN REGULATORS ONLY (AR1, AR3)
OPERATION OF REGULATORS
The regulator adapter (top cover) is available with one
control module port or three control module ports. One
control module port is often used for a solenoid valve
or a single pressure regulator. Three control module
ports are often used for a dual regulator and other
multiple function variations.
When the modular regulator has three control module
ports, two are in series (SI and SII) and one is in
parallel (P). Inlet pressure enters the internal
equalization passage and goes to both the P port and
the SI port. Inlet pressure enters the SII when the control
module SI port is open. When the control module in the
SI and SII port or the P port is open, pressure enters the
space above the piston which forces the main valve
seat to open and regulate flow.
Hansen regulators are normally furnished with control
modules (pilots) installed and tested (see page 3).
However, modular regulators less pilots and flanges
are available on order from ¾" to 6" (20 mm to 150 mm).
Each AR1 and AR3 includes flange gaskets, nuts and
bolts, and a plugged ¼" FPT outlet pressure access
port. The access port is for connecting outlet or differential
control module sensing lines or gauges.
AR1 is the main regulator body with ONE control module
(pilot) port, control module not included.
AR3 is the main regulator body with THREE control
module (pilot) ports, for a maximum of three control
modules, not included. The 5" and 6" (125 mm and 150
mm) AR3 regulators have a single control module port
with connection points for up to three total ports via
mounted pilot piping.
TO ORDER
(Main Regulators only) Specify port size and catalog
number (AR1 or AR3).
¾" through 6"
(20 mm through
150 mm)
¾" through 4"
(20 mm through
100 mm)
5" & 6"
(125 mm and 150 mm)
AR1 AR3
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