IASMANUAL 0821
KAM CONTROLS, INC.
11
PRV CRACKING PRESSURE SETUP
1.
Turn the PRV Locking Nut clockwise until it
reaches the start of the PRV threads. FIG. 3-12.
2.
Turn the PRV Cap clockwise until it reaches the
Locking Nut to reach reference/starting point for
cracking pressure procedure. FIG. 3-12.
4.
Hold the PRV Cap in place using a 3/4" wrench
while turning the Locking Nut counterclockwise
until it reaches the PRV Cap and tighten to the
point that the cap cannot move. Lock the PRV
Cap with the Locking Nut and the provided wire
and lead lock. FIG. 3-13.
5.
Thread provided wire through holes in Locking
Nut and PRV Cap and twist to tighten.
NOTE: See included PRV manual for further
instructions.
I N S TA L L AT I O N C O N T I N U E D
FIG. 3-12
Locking Nut
PRV Cap
#
Turns
Blue
(50-350 psi)
Yellow
(350-750 psi)
Purple
(750-1,500 psi)
2
340
N/A
N/A
2.5
320
795
1,520
2.75
310
744
1,466
3
285
664
1,379
3.5
248
607
1,242
4
225
494
1,095
4.5
184
431
945
5
150
316
810
5.5
105
N/A
N/A
6
75
N/A
N/A
6.5
50
N/A
N/A
3.
Turn the PRV Cap counterclockwise to set the PRV
cracking pressure to 50 psi above your maximum
operating pressure per Table 3-3.
Example:
Maximum operating pressure=175 psi
Desired cracking pressure=175 psi + 50 psi=225 psi
Turning the PRV Cap counterclockwise 4 full turns will
set the cracking pressure to around 225 psi.
NOTE: Pressure vs. number of turns are estimates
only. Always make sure there are no leaks at the
set cracking pressure with the maximum operating
pressure. Not setting the PRV correctly will lead to an
incorrect amount of sample being drawn.
TABLE 3-3
Spring Cracking Pressure (psi)
FIG. 3-13
Locking Nut
PRV Cap
NOTE: If your line pressure is within the range of the cracking pressure of the PRV, follow steps on the next section
"PRV Cracking Pressure Setup" to set the correct cracking pressure.