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912N Series
Specifications
Available Configuration
See Table 1
Body Sizes and End Connection Styles
inlet: 1/4 NPT
Outlet: 1/4 or 3/8 NPT
Maximum allowable inlet Pressure
250 psig (17,2 bar)
Outlet Pressure Ranges
(1)
See Table 1
Maximum allowable Outlet Pressure
Emergency Outlet Pressure:
20 psig (1,4 bar)
Recommended Outlet Pressure to avoid internal
Part Damage: 3 psi (0,21 bar differential) above outlet
pressure setting; provide external relief if start-to-
discharge point exceeds 3 psid (0,21 bar differential)
(see Table 1)
1. The pressure/temperature limits in this Instruction Manual or any applicable standard limitation should not be exceeded.
aVailaBlE
CONFiguRaTiON
912N Series
without handwheel
912N Series
with handwheel
1. Internal Relief Performance is only adequate for relieving minor build-up situations. External relief is required if start-to-discharge point exceeds 3 psid (0,21 bar differential).
Regulator operation within ratings does not preclude the
possibility of damage from external sources or from debris
in the lines. A regulator should be inspected for damage
periodically and after any overpressure condition.
Ensure that the regulator is undamaged and contains no foreign
material. Install the regulator so that the flow through it leaves
the outlet port (marked on the body). The regulator may be
installed in any position. However, the spring case vent should
be pointed down. Spring case/vent orientation can be changed
by rotating the spring case with respect to the body.
For an indoor installation, if the regulator controls a gas that
is flammable or otherwise hazardous, a spring case with the
standard vent line should be used so that the exhaust can be
piped away. Provide protection on a remote vent by installing
a screened vent cap into the remote end of the vent pipe. The
vent should be pointed down.
Apply a good grade of pipe compound to the pipe threads
before making the connections. Install piping into
the 1/4 NPT inlet connection and the 1/4 or 3/8 NPT
outlet connection.
Each regulator is factory-set for the pressure setting
specified on the order. If no setting was specified, the outlet
2
(1)
(1)
Table 1. Outlet Pressure Range Data
OuTlET PRESSuRE RaNgE
3 to 7-inches w.c.
(7 to 17 mbar)
5 to 10-inches w.c.
(12 to 25 mbar)
9.25 to 13-inches w.c.
(23 to 32 mbar)
12 to 24-inches w.c.
(30 to 60 mbar)
0.5 to 2.7 psig
(0,03 to 0,18 bar)
2.7 to 5 psig
(0,18 to 0,34 bar)
8 to 24-inches w.c.
(20 to 60 mbar)
2.7 to 5 psig
(0,18 to 0,34 bar)
internal Relief Performance
approximate internal Relief Valve Start-to-Discharge
Point: See Table 1
Capacity: Adequate only for relieving minor build-up
situations such as caused by chips or dirt blocking the
seat partly open; for major malfunctions, external relief is
required according to the Installation section.
Temperature Capabilities
-20° to 160°F (-29° to 71°C)
Pressure Registration
Internal
Vent Size
1/8 NPT tapped with removable screen
approximate Weight
1.3 pounds (0,6 kg)
aPPROxiMaTE POiNT aBOVE OuTlET
PRESSuRE SETTiNg aT WhiCh iNTERNal
REliEF STaRTS TO DiSChaRgE
5 to 21-inches w.c.
(12 to 52 mbar)
8 to 30-inches w.c.
(20 to 75 mbar)
16 to 39-inches w.c.
(40 to 97 mbar)
17-inches w.c. to 3 psig
(42 mbar to 0,21 bar)
0.70 to 6.80 psig
(0,05 to 0,47 bar)
3.80 to 12.5 psig
(0,26 to 0,86 bar)
30.3 to 35.4-inches w.c.
(75 to 88 mbar)
5.4 to 6.7 psig
(0,37 to 0,46 bar)
pressure is factory-set at the mid-range of the control spring.
The procedure for adjusting the output pressure is given in the
Startup section.
Startup
Key numbers are referenced in Figure 2.
With installation completed and downstream equipment
properly adjusted, slowly open the upstream and
downstream shut-off valves while monitoring the regulator
output pressure.
!
For the 912N Series construction with no drive
screw in the spring case, never adjust the
control spring to produce an outlet pressure
higher than the outlet pressure range for that
particular spring. Doing so could overpressure
the system and cause personal injury or
equipment damage. if the desired outlet
pressure is not within the range of the control
spring, install a spring of the proper range
according to the Maintenance section.
CONTROl SPRiNg
SElECTiON
Color
Part Number
1B784327222
1B784427222
Orange
1L507937022
Unpainted
1B784527222
1B784627222
(1)
1B784727222
(1)
1B784527222
1B784727222
(1)
WaRNiNg
Code
Red
Blue
Yellow
Green
Blue
Green
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