Louisville CD-1261, Руководство пользователя

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10
Model 121 Regulators – Variations – Brochure
Variations
GCD1328-040
GCD1328-045
Zero governor
Zero governors are also called Atmospheric Regulators . They
are used for outlet pressures close to atmospheric, from slightly
above this to slightly below. Inlet pressures are the same as on
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All pipe sizes listed on Page 8 are available: ¾" through 4". Note
from the illustrations that the 3" and 4" sizes use a reversed main
spring design while the remaining sizes 2½" and smaller, use
a counterspring along with the standard main spring. With the
exception of certain parts required for the foregoing, everything
else is the same as on standard 121 regulators.
Pressures and Springs
Size Outlet Pressure Range Springs
¾", 1" and 1¼" Model 121-8 1½" w.c. vacuum (–1½" w.c.) to + 1½" w.c.
Main Spring (red-black)……….......143-82-021-00
Counterspring (red-black)….…......121-10-021-50
2½", 2" and 2½" Model 121-12 1" w.c. vacuum (–1" w.c.) to + 1½" w.c.
Main Spring (red-black)……….......143-82-021-00
Counterspring………………….......120-10-021-10
3" and 4" Model 121-16 1¼" w.c. vacuum (–1¼" w.c.) to + 1¼" w.c. Main Spring only…………………...121-62-021-54
Differential Regulators
Differential regulators are used to maintain a constant difference between gas
pressure and air or combustion chamber pressure in certain types of premix and
nozzle mix burners. This is done by adding a second control line which applies the
air or combustion chamber pressure to the top of the diaphragm.
Differential regulators can also be used to maintain a constant pressure drop
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121-16 both are ½" NPT.
All of the pipe sizes listed on Page 8 are available; ¾" through 4". Parts are
interchangeable with standard 121 regulators.
For differentials lower than 3½" w.c., please contact your Sensus Representative.
GCD1328-045A
Size
Differential
Pressure Range Spring Color
Spring
Part Number
0D[LPXP%RG\
Pressure
Maximum Diaphragm
Pressure Differential
Maximum Diaphragm
Case Pressure
¾", 1" and 1¼"
Model 121-8 **
3½" to 6½"
5" to 8½" w.c.
6" to 14" w.c.
12" to 28" w.c.
1 psi to 2 psi
red-black
blue-black
green-black
green
orange (2" O.D.)
143-82-021-00
143-82-021-01
143-82-021-02
143-16-021-05
143-16-021-06
60 psi 2 psi 35 psi
1½", 2" and 2½"
Model 121-12
3½" to 6½" w.c.
5" to 8½" w.c.
6" to 14" w.c.
12" to 28" w.c
1 psi to 2 psi
red (2" O.D)
blue (2" O.D.)
green (2" O.D.)
orange (2" O.D.)
black
143-16-021-03
143-16-021-04
143-16-021-05
143-16-021-06
143-16-021-07
60 psi 2 psi 20 psi
3" and 4"
Model 121-16
3½" to 6½" w.c.
5" to 8½" w.c.
6" to 14" w.c.
12" to 28" w.c.
red (3" O.D.)
blue (3" O.D.)
green (3" O.D.)
orange (3" O.D.)
021-62-021-50
121-62-021-51
121-62-021-52
121-62-021-53
40 and 15 * 1 psi 10 psi
3" and 4"
Model 121-12
1 psi to 2 psi
1½ psi to 3 psi
black
cadmium
143-16-021-07
143-16-021-08
40 and 15 * 2 psi 20 psi
* 3" Model 121-16 is 40 psi and 4" Model 121-16 is 15 psi. ** ¾" x ¾" not available.
GCD1328-040
GCD1328-045
GCD1328-045A