Installation Guide

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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Table 1. Series 133 Outlet Pressure Ranges