Data Sheet

Bulletin 74.1:T205B
2
1. The pressure/temperature limits in this Bulletin or any applicable standard limitation should not be exceeded.
2. See Table 3 for operating temperature ranges for available trim combinations.
3. Pipe nipples and anges are 316 Stainless steel for anged body assemblies.

This section lists the specications of the Type T205B Balanced Tank Blanketing Regulator. Factory specication,
such as maximum temperature, maximum inlet and outlet pressures, spring range and seat or orice size are
stamped on the nameplate fastened on the regulator at the factory.

See Table 1

(1)
See Table 1

(1)
150 psig / 10.3 bar

200 psig / 13.8 bar

(1)
35 psig / 2.4 bar

75 psig / 5.2 bar


(1)

 35 psig / 2.4 bar

 10 psig / 0.69 bar

(1)
See Table 2

Class VI (Soft Seat)

External

3/8 inch / 9.5 mm

See Table 4
C


See Table 8

See Table 9



Nitrile (NBR):
-40 to 180°F / -40 to 82°C
Fluorinated Ethylene Propylene (FEP):
-20 to 180°F/ -29 to 82°C
Fluorocarbon (FKM):
40 to 300°F / 4 to 149°C
Ethylene Propylene Diene (EPDM):
-20 to 225°F / -29 to 107°C
Peruoroelastomer (FFKM):
0 to 300°F / -18 to 149°C

Gray cast iron: -20 to 300°F / -29 to 149°C
WCC Carbon steel: -20 to 300°F / -29 to 149°C
CF8M/CF3M Stainless steel:
-40 to 300°F / -40 to 149°C

Gray cast iron, WCC Carbon steel and
CF8M/CF3M Stainless steel
(3)

See Table 3

1/4 NPT

1/2 NPT

17.7 pounds / 8 kg

Tank blanketing is the process of covering the surface
of a liquid stored in a vessel with a gas, usually
nitrogen and of maintaining a slightly positive pressure
in an enclosed storage tank. Tank blanketing prevents
a stored liquid from vaporizing into the atmosphere,
reduces liquid combustibility and prevents oxidation
or contamination of the liquid by reducing its exposure
to air. This process is used in various products, such
as adhesives, pharmaceuticals, pesticides, fertilizers,
fuels, inks and food additives.
Type T205B balanced tank blanketing regulator
(Figure 1) is a direct-operated regulator with fully
balanced plug design to reduce inlet pressure
sensitivity and with a large diaphragm to accurately
control tank pressure at low pressure settings on tank
blanketing systems. It uses a control line to sense the
pressure in an enclosed storage tank. Type T205B
maintains a slightly positive pressure and thereby
reduces the possibility of tank wall collapse during
pump out operation.