2
Type 1301
Note
It is important that the regulator be
installed so that the vent hole in the
spring case is unobstructed at all times.
For outdoor installations, the regulator
should be located away from vehicular
traffic and positioned so that water, ice,
and other foreign materials cannot 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
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, 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. Tighten the locknut to
maintain the desired setting.
Taking Out of Service (Shutdown)
!
WARNING
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 Spring Case
3 Bottom Cap
4 Yoke
5 Orifice
6 Valve Disk Assembly
7 Diaphragm
8 Diaphragm Plate
9 Upper Spring Seat
10 Valve Spring
11 Spring
12 Body Gasket
13 Diaphragm Plate Gasket
14 Bottom Cap O-ring
15 Adjusting Screw
16 Spring Case Cap Screw
17 Machine Screw
18 Locknut
19 Diaphragm Locknut
21 Top Connector
22 Valve Disk Collar
24 Handwheel (Not shown)
26 Vent Screen (Not shown)
27 Mounting Post (Not shown)
28 Mounting Screw (Not shown)
29 Screw (Not shown)
30 Washer (Not shown)
32 Mounting Bracket (Not shown)
33 Bracket Cap Screw (Not shown)
34 Bracket Mounting Washer (Not shown)
35 NACE Tag (Not shown)
36 Tag Wire (Not shown)
38 Body O-Ring (Not shown)
39 Top Connector O-Ring (Not shown)
40 Pipe Plug
