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L91A,B,D PROPORTIONING PRESSURETROL
L91A,B,D
ALL OTHER
MODELS
10 TO 300 PSI
0 TO 15 PSI
0 TO 16 OZ/IN
2
1/4-18 NPT
1
EXTERNAL THREADS ON 0 TO 15 PSI MODELS; INTERNAL THREADS ON ALL OTHER MODELS.
SOME MODELS ARE ALSO AVAILABLE WITH 1/4-19 BSP-TR INTERNAL THREADS; SEE TABLE 1.
2
PROPORTIONING RANGE ADJUSTING SCREW ON L91B,D MODELS ONLY.
3
33312B KNURLED ADJUSTMENT SCREW KNOB, 7/8 IN. [22.2 MM] DIAMETER,. KNOB IS INCLUDED WITH 10 TO 300 PSI [0.07 TO .07 MPa] MODELS;
OPTIONAL ACCESSORY FOR OTHER MODELS.
4
FOR 10 TO 300 PSI [0.07 TO 2.07 MPa] MODELS. DIM C INCLUDES THE KNURLED ADJUSTMENT KNOB.
OPERATING RANGE
CUSTOMARY UNITS
0 TO 15 PSI
5 TO 150 PSI
10 TO 300 PSI
Fig. 1. Mounting dimensions of the L91 Proportional Pressuretrol
60-2152—08
®
CONTROLLERS
4-1/2 (114.3) (COVER)
(110.3) (CASE)
4-11/32
3-57/64
(98.8)
3-13/32 (86.5)
1-5/32
(29.4)
2
1
2-1/8
(53.5)
DIM A (SEE TABULATION TABLE)
TABULATION OF DIMENSIONS A, B, AND C
METRIC UNITS
IN.
0 TO 103 kPa
2-7/16
0.03 TO 1.03 MPa
1-5/8
1-1/4
0.07 to 2.07 MPa
3
2
1-3/32
(27.8)
3-7/8
(98.4)
1-13/16
(46.0)
DIM A
DIM B
MM
IN.
61.9
1-7/32
41.3
13/16
31.8
5/8
4
2-3/4
(69.9)
1-3/16
(30.2)
1-1/16
(27.0)
3-23/32
(94.5)
2-5/64
(52.8)
7/8
(22.2)
(2)
13/16
(20.1)
1-1/16
(27.0)
DIM B (SEE
TABULATION
TABLE)
DIM C
MM
IN.
MM
31.0
6-7/8
174.6
20.6
5-3/4
146.1
15.9
6-1/16
154.0
4
4
M29781
®
Controllers, in in. (mm).
4
DIM C (SEE
TABULATION
TABLE)
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