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Type T205B
Table 1. Body Sizes, End Connection Styles, Maximum Allowable and Operating Inlet Pressures
BODY SIZE
BODY MATERIAL
DN
In.
Gray Cast Iron
20 or
3/4 or
WCC Carbon Steel
25
1
LCC Carbon Steel
CF8M/CF3M Stainless Steel
1. All flanges are welded. Weld-on flange dimension is 356 mm / 14 in. face-to-face.
2. Pipe nipples and flanges are 316 Stainless steel for flanged body assemblies.
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
Type T205B regulator has an outlet pressure
rating lower than the inlet pressure rating. The
recommended pressure limitations are stamped on
the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure can
exceed the maximum operating outlet pressure
rating. Common methods of external overpressure
protection includes relief valves, monitoring
regulators, shut-off devices and series regulation.
Overpressuring any portion of the regulators beyond
the limits in the Specifications section may cause
leakage, damage to regulator parts or personal injury
due to bursting of pressure-containing parts.
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 regulator properly adjusted, slowly
open the upstream and downstream shutoff valves.
2
and Maximum Outlet (Casing) Pressure
END CONNECTION
STYLES
NPT
NPT, CL150 RF,
CL300 RF or PN 16/25/40 RF
(2)
Note
MAXIMUM ALLOWABLE AND OP-
ERATING INLET PRESSURE
(1)
bar
10.3
13.8
Adjustment
To change the outlet pressure, Perform the
following procedure.
For internal flat circular adjusting screw:
1. Remove the closing cap (key 22).
2. Use a 25 mm / 1 in. hex rod or flat screwdriver to
turn the adjusting screw (key 35) either clockwise
to increase outlet pressure or counterclockwise to
decrease outlet pressure. The regulator will go into
immediate operation. To ensure correct operation,
always use a pressure gauge to monitor the tank
blanketing pressure when making adjustments.
3. After making the adjustment, replace the closing
cap gasket (key 25) and install the closing cap
(key 22).
For external square head adjusting screw:
1. Loosen the locknut (key 20).
2. Turn the adjusting screw (key 35) either clockwise
to increase outlet pressure or counterclockwise to
decrease outlet pressure. Always use pressure
gauge to monitor the tank blanketing gas pressure
when making adjustments.
3. After making the adjustment, tighten the locknut
(key 20).
Taking Out of Service (Shutdown)
To avoid personal injury resulting from
sudden release of pressure, isolate the
regulator from all pressure before
attempting disassembly.
MAXIMUM OUTLET
(CASING) PRESSURE
psig
bar
150
2.4
200
5.2
WARNING
!
psig
35
75
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