Data Sheet
Bulletin 74.1:T205B
5
Table 2. Outlet (Control) Pressure Ranges and Spring Information
1.0 to 2.5
(1)(2)
2.5 to 6.2
(1)(2)
Orange 0.072 1.8 3.25 82.6
2.5 to 7.0
(2)
6.2 to 17
(2)
Red 0.085 2.2 3.63 92.2
7.0 to 16.0 17 to 40 Unpainted 0.105 2.7 3.75 95.2
0.5 to 1.2 psig 34 to 83 Yellow 0.114 2.9 4.31 109
1.2 to 2.5 psig 83 to 172 Green 0.156 4.0 4.06 103
2.5 to 4.5 psig 0.17 to 0.31 bar Light Blue 0.187 4.8 3.94 100
4.5 to 7 psig 0.31 to 0.48 bar Black 0.218 5.5 3.98 101
1. Do not use Fluorocarbon (FKM) diaphragm with this spring at diaphragm temperatures lower than 60°F / 16°C.
2. To achieve the published outlet pressure range the spring case must be installed pointing down.
Table 3. Available Construction and Trim Materials
Gray cast iron,
WCC Carbon
Steel,
or CF8M/
CF3M
Stainless
steel
(1)
316
Stainless
steel
304
Stainless
steel
302
Stainless
steel
Nitronic
®
60
Standard
Fluorinated Ethylene
Propylene (FEP)
Nitrile (NBR)
-20 to 180°F /
-29 to 82°C
NN Nitrile (NBR) Nitrile (NBR)
-40 to 180°F /
-40 to 82°C
VV Fluorocarbon (FKM) Fluorocarbon (FKM)
40 to 300°F /
4 to 149°C
TV
Fluorinated Ethylene
Propylene (FEP)
Fluorocarbon (FKM)
40 to 180°F /
4 to 82°C
TK
Fluorinated Ethylene
Propylene (FEP)
Peruoroelastomer
(FFKM)
0 to 180°F /
-18 to 82°C
TE
Fluorinated Ethylene
Propylene (FEP)
Ethylene Propylene
Diene (EPDM)
-20 to 180°F /
-29 to 82°C
1. Pipe nipples and anges are 316 Stainless steel for anged body assemblies.
Nitronic
®
is a registered trademark of AK Steel Corporation.
U.S. GPM 8.021
SCFH air required
(1)
U.S. GPH 0.1337
Barrels/hour 5.615
Barrels/day 0.2340
1. To convert to Nm
3
/h multiply SCFH by 0.0268.
Table 5. Flow Rate Conversion
Table 4. Type T205B Flow and Sizing Coefficients
C
C
C
1
C
C
C
1
3/8 9.5 98 2.8 34.6 101 2.9 34.6