133 Series
2
enter the spring case through the vent. Avoid placing
the regulator beneath eaves or downspouts, and be
sure it is above the probable snow level.
Overpressure Protection
The recommended pressure limitations are stamped on
the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure exceeds the
maximum operating outlet pressure rating. Overpressure
protection should also be provided if the regulator inlet
pressure is greater than the safe working pressure of the
downstream equipment.
Regulator operation below the maximum pressure limitations
does not preclude the possibility of damage from external
sources or debris in the line. The regulator should be inspected
for damage after any overpressure condition.
Startup
If the downstream system is already pressured
by another regulator or by a manual bypass, then
extra precautions must be taken when placing
the 133 Series in service. The outlet of the regu-
lator must never be subjected to pressures higher
than the inlet pressure, or the balancing dia-
phragm may be damaged. Also, the control line
pressure must never exceed the set point dic-
tated by the spring setting by more than 0,21 bar
(3 psig), or the valve seat or diaphragm plates
can be damaged.
The regulator is factory set at approximately the midpoint of
the spring range or the pressure requested, so an initial
adjustment may be required to give the desired results. With
proper installation completed and relief valves properly
adjusted, slowly open the upstream and downstream shutoff
valves.
Adjustment
To change the outlet pressure, remove the closing cap or
loosen the locknut and turn the adjusting screw clockwise
to increase outlet pressure or counterclockwise to decrease
pressure. Monitor the outlet pressure with a test gauge
during the adjustment. Replace the closing cap or tighten
the locknut to maintain the desired setting.
Taking Out of Service (Shutdown)
To avoid personal injury resulting from sudden
release of pressure, isolate the regulator from all
pressure before attempting disassembly.
Parts List
Key Description
1
Body
2
Orifice
3
Belleville Spring Washer
4
O-Ring
5
Cage
6
Bearing
7
Lower Casing
8
Spring Case
8A
Spring Case
8B
Flapper Stem
8C
Lower Flapper
8D
Upper Flapper
8E
Orifice
8F
Screw
8G
Spring
8H
Screen
8J
Snap Ring
9
Closing Cap
10
Closing Cap Gasket
11
Adjusting Screw
12
Spring
13
Spring Seat
14
Diaphragm Plate
15
Diaphragm
16
Sealing Diaphragm Plate
17
Sealing Washer
18
Stem
19
O-Ring
20
Hex Nut
21
Diaphragm Plate
22
Diaphragm
23
Washer
24
Guide Bushing
25
Stem Sleeve
Key Description
26
E-Ring
27
Roll Pin
28
Valve Disk Assembly
29
Registration Disk
30
Washer
31
Hex Nut
32
O-Ring
33
Stud
34
Locknut
35
Cap Screw
36
Hex Nut
39
Set Screw
40
Thrust Washer
41
Upper Spring Seat
42
Spring Retainer
43
Ball
44
Extension Spring
45
Retaining Ring
46
Restriction Collar
47
Set Screw
49
Pipe Nipple
50
Vent Assembly
51
Street Elbow
52
Upper Diaphragm Casing
53
Cap Screw
54
Adaptor O-Ring
55
Cap Screw
56
Mounting Bracket
57
Mounting Bracket Gasket
58
Lock Washer
59
Hex Jam Nut
60
Casing Adaptor
61
Diaphragm Washer O-Ring
62
Cap Screw
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1
Table 1. Series 133 Outlet Pressure Ranges
