16
Appendix “C”
The NRS-series valves can be mounted in various positions (
other than upside
down!
). (The following illustrations depict some of the various mounting positions.
Vertical Mounting
Mounting variations from simply rotating the valve body
(7)
:
The drawings below illustrate the
typical vertical mounting positions for the NRS-series valves, with variations obtain by rotating the valve
body. Rotate-1 is the typical installation position of the valve body. Rotate-2 illustrates a mounting
where the valve body has been rotated 90º clockwise. Rotate-3 illustrates a mounting where the valve
body has been rotated 180º clockwise, and Rotate-4 illustrates a mounting where the valve body has
been rotated 270º clockwise.
Typical Installation
Rotate-1
Valve Body rotated 90 degrees
Rotate-2
Valve Body rotated 270 degrees
Valve Body rotated 180 degrees
Rotate-3
Rotate-4
Horizontal Mounting
Chiller
Supplemental
Support
Supplemental
Support
RuptureAlarm
™
Mounting
Caution:
Regardless of mounting position of the
NRS-3, the Double Check Pressure Equalizing Valve
(22)
MUST be mounted in a vertical position with the
filter/vent
(34)
pointing up (
é
). Mounting the double
check pressure equalizing valve
(22)
vertically may
require additional fittings.
Illustration of RuptureAlarm™ mounting
NOTE:
If the NRS-3
RuptureSeal
™ valve is
mounted in the horizontal position, its opening
pressure will be lower than the factory setting
of 15 psi (the valve is calibrated by the
manufacturer for vertical mounting). This will
not negatively effect the valve’s flow capacity.
The
valve’s
opening
point
will
be
approximately 1/2 psi lower than its normal set
point of 15 psig, however the functioning of the
RuptureSeal
™ will not be significantly
effected.
Rupture Alarm
(42) Inlet
Flange
(49) Connecting Tube
(35) Alarm
Port
Pressure
Guage
Screws