Valve adjustment chart – Nor-Cal Linear Gate Valve User Manual
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Nor-Cal Products, Inc., 1967 South Oregon St., Yreka, CA 96097 • Toll Free 800-824-4166 or 530-842-4457 • www.n-c.com
Rev. 1-2013
Valve Adjustment Chart
INSTRUCTION FOR VALVE ADJUSTMENT
VALVE
DIMENSION “A”
DIMENSION “B”
DIMENSION “B”
DIMENSION “C”
RECOMMENDED
SIZE
PISTON ADJUST*
OVERCENTER
NO OVER-
COMPRESSION
LOCKING AIR
ADJUST
CENTER
ADJUST
PRESSURE
ADJUST
1.50
.110 **
N/A
N/A
.210
20-30 PSI
2.00
.120 **
N/A
N/A
.360
35-50 PSI
2.50
.125 **
N/A
N/A
.190
35-55 PSI
3.00
.125 **
N/A
N/A
.390
60-65 PSI
4.00
N/A
.278
.360
.420
20-35 PSI
6.00
N/A
.085
.160
.350
35-45 PSI
8.00
N/A
.365
.465
.260
55-65 PSI
10.00
N/A
.770
.800
.720
25-35 PSI
10.75
N/A
.635
1.035
.550
30-40 PSI
12.00
N/A
.640
1.035
.550
30-40 PSI
14.00
N/A
—
—
—
45-55 PSI
16.00
N/A
.540
.760
.540
65-80 PSI
18.00
N/A
—
—
—
—
21.00
N/A
—
—
—
—
Figure 14 - VALVE ADJUSTMENT TABLE
DIM “A”
LOWER LINK
ASSEMBLY
PISTON ASSEMBLY AD-
JUSTMENT
LOWER LINK
ASSEMBLY
ADJUSTMENT
ALL DIMENSIONS IN INCHES
* = STARTING ADJUSTMENT
** = PISTON ADJUSTMENT CONTROLS
OVER- CENTER ADJUSTMENT
DIM “C”
DIM “B”