W4559_1
RESTRICTOR SETTING GUIDE
TYPE 112 RESTRICTOR ADJUSTMENT GUIDE
(1)
Regulator Performance
2
4
6
8
Accuracy
Hysteresis
Stability
Speed of Response (Main Valve Closing)
Speed of Response (Main Valve Opening)
BODY SIZE
RECOMMENDED RESTRICTION SETTING
In.
DN
1 and 2
25 and 50
“6” (other restriction settings may be used)
3
80
“6” or “8” (lower settings are not recommended)
4
100
“8” (lower settings are not recommended)
Increased performance
Decreased performance
1. See Table 4 for recommended restriction settings.
Assembly
1. Install the inlet strainer (key 23) into the body
(key 1).
Note
When installing in a vertical orientation,
apply lubricant to the bottom of the inlet
strainer (key 23) to help hold parts in
place while installing cage.
3. Remove the diaphragm (key 9) and plug (key 11)
assembly and bonnet O-ring (key 28).
4. Pull out the cage (key 7), O-ring (key 8) and inlet
strainer (key 23).
5. Clean parts and replace if necessary.
2. Lightly lubricate and install the cage O-ring (key 8).
3. Apply lubricant lightly to all O-rings or the mating
part before installing them.
4. Install the cage (key 7) and lightly lubricate and
install the bonnet O-ring (key 28).
5. Lubricate the top and bottom of the outer edge
(bead area) of the diaphragm (key 9) and place
diaphragm and plug (key 11) assembly on the
cage (key 7).
6. Lubricate the top plug O-ring (key 14).
7. If travel indicator was removed, lightly lubricate
the travel indicator assembly threads (key 19)
and screw it into the bonnet (key 2). See Travel
Indicator Assembly Maintenance for maintenance.
Table 4.
Recommended Setting for Type 112 Restrictor
Figure 5.
Restrictor Adjustment and Restrictor Setting Guide
RESTRICTOR ADJUSTMENT
9
Type LR128