Bulletin 74.1:T205B April 2014 Type T205B Balanced Tank Blanketing Regulator Figure 1. Type T205B Balanced Tank Blanketing Regulator Contents Features Introduction .................................................................. 2 • Fully Balanced Plug Design Specifications .............................................................. 2 • Large Diaphragm Features ..................................................................... 3 Principle of Operation .......................................
Bulletin 74.1:T205B Specifications This section lists the specifications of the Type T205B Balanced Tank Blanketing Regulator. Factory specification, such as maximum temperature, maximum inlet and outlet pressures, spring range and seat or orifice size are stamped on the nameplate fastened on the regulator at the factory.
Bulletin 74.1:T205B Balanced trim assembly Lever Pusher post INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE MXXXX Orifice Pressure registration Diaphragm Valve disk Type Y602-1 Vent Control Spring INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE Type T205B Fully Balanced Plug Design — Eliminates setpoint changes caused by varying inlet pressure. This design provides smooth opening of the plug for stable flow and greater regulating flow capacity.
Bulletin 74.1:T205B HORIZONTAL PIPELINE VENT POINTED DOWN DOWNSTREAM CONTROL LINE INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE LOADING PRESSURE Figure 3. Type T205B Actuator Casing Drainage Table 1. Body Sizes, End Connection Styles and Maximum Allowable Inlet Pressures Inch Body Size 3/4 or 1 DN 20 or 25 BODY MATERIAL End Connection styles(1) Maximum ALLOWABLE inlet pressure psig bar Gray cast iron NPT 150 10.
Bulletin 74.1:T205B Table 2. Outlet (Control) Pressure Ranges and Spring Information Outlet (Control) Pressure Range Inch w.c. mbar 1.0 to 2.5(1)(2) 2.5 to 7.0(2) 7.0 to 16.0 0.5 to 1.2 psig 1.2 to 2.5 psig 2.5 to 4.5 psig 4.5 to 7 psig 2.5 to 6.2(1)(2) 6.2 to 17(2) 17 to 40 34 to 83 83 to 172 0.17 to 0.31 bar 0.31 to 0.48 bar Spring Wire Diameter Spring Color Orange Red Unpainted Yellow Green Light Blue Black Spring Free Length Inch mm Inch mm 0.072 0.085 0.105 0.114 0.156 0.187 0.218 1.8 2.
Bulletin 74.1:T205B Table 6. Flow Rate Required due to Thermal Cooling VESSEL CAPACITY Barrels Gallons AIR FLOW RATE REQUIRED(1) Liters SCFH Nm3/h 1.6 60 2500 9500 60 100 4200 16,000 100 2.7 500 21,000 79,500 500 13.4 1000 42,000 159,000 1000 26.8 2000 84,000 318,000 2000 53.6 3000 126,000 477,000 3000 80.
Bulletin 74.1:T205B Capacity Information Capacity tables are based on 1.0 specific gravity air. If other blanketing gas is used, convert the tabular values as follows. For blanketing (pad) gases other than air, multiply the given air flow rate by the correction factors in Table 6. For gases of other specific gravities, divide the given air flow rate by the square root of the appropriate specific gravity. Table 8. Type T205B Cv Coefficient Spring Range and Color Outlet Pressure Setting 1 inch w.c. / 2.
Bulletin 74.1:T205B Table 8. Type T205B Cv Coefficient (continued) Spring Range and Color Outlet Pressure Setting 2.5 inches w.c. / 6.2 mbar 2.5 to 7.0 inches w.c. / 6.2 to 17 mbar Red 4 inches w.c. / 10 mbar 7 inches w.c. / 17 mbar Offset from Setpoint -1 to +2 inches w.c. / -2.5 to +5.0 mbar -1 to +2 inches w.c. / -2.5 to +5.0 mbar -2 to +2 inches w.c. / -5 to +5.0 mbar Inlet Pressure psig bar 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size 1 0.07 1.8 1.8 2 0.14 1.9 1.8 4 0.
Bulletin 74.1:T205B Table 8. Type T205B Cv Coefficient (continued) Spring Range and Color Outlet Pressure Setting 11 inches w.c. / 27 mbar Offset from Setpoint 20% droop 7.0 to 16.0 inches w.c. / 17 to 40 mbar Unpainted 15 inches w.c. / 37 mbar 20% droop Cv coefficient Inlet Pressure psig bar 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size 1 0.07 1.5 1.9 2 0.14 1.6 1.6 4 0.28 1.5 1.6 6 0.41 1.6 1.7 8 0.55 1.7 1.6 10 0.69 1.7 1.7 15 1.0 1.8 1.7 20 1.4 1.8 1.
Bulletin 74.1:T205B Table 8. Type T205B Cv Coefficient (continued) Spring Range and Color Outlet Pressure Setting 0.5 psig / 34 mbar Offset from Setpoint 20% droop 0.5 to 1.2 psig / 34 to 83 mbar Yellow 1.2 psig / 83 mbar 20% droop Inlet Pressure psig bar 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size 2 0.14 1.5 1.6 4 0.28 1.5 1.6 6 0.41 1.5 1.5 8 0.55 1.5 1.5 10 0.69 1.5 1.4 15 1.0 1.5 1.5 20 1.4 1.5 1.5 40 2.8 1.7 1.5 60 4.1 1.9 1.8 80 5.5 2.1 2.
Bulletin 74.1:T205B Table 8. Type T205B Cv Coefficient (continued) Spring Range and Color Outlet Pressure Setting 1.2 psig / 83 mbar Offset from Setpoint 20% droop 1.2 psig to 2.5 psig / 83 to 172 mbar Green 2.5 psig / 172 mbar 20% droop Inlet Pressure Cv coefficient psig bar 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size 2 0.14 1.4 1.5 4 0.28 1.2 1.3 6 0.41 1.2 1.2 8 0.55 1.2 1.2 10 0.69 1.2 1.1 15 1.0 1.1 1.1 20 1.4 1.2 1.1 40 2.8 1.1 1.1 60 4.1 1.1 1.
Bulletin 74.1:T205B Table 8. Type T205B Cv Coefficient (continued) Spring Range and Color Outlet Pressure Setting 2.5 psig / 0.17 bar Offset from Setpoint 20% droop 2.5 to 4.5 psig / 0.17 to 0.31 bar Light Blue 4.5 psig / 0.31 bar 20% droop Inlet Pressure psig bar 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size 4 0.28 1.4 1.4 6 0.41 1.2 1.2 8 0.55 1.1 1.2 10 0.69 1.2 1.2 15 1.0 1.1 1.1 20 1.4 1.1 1.2 40 2.8 1.1 1.1 60 4.1 1.1 1.0 80 5.5 1.1 1.1 100 6.
Bulletin 74.1:T205B Table 8. Type T205B Cv Coefficient (continued) Spring Range and Color Outlet Pressure Setting 4.5 psig / 0.31 bar Offset from Setpoint 20% droop 4.5 to 7 psig / 0.31 to 0.48 bar Black 7 psig / 0.48 bar 20% droop Cv coefficient Inlet Pressure psig bar 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size 10 0.69 1.1 1.2 15 1.0 1.1 1.1 20 1.4 1.1 1.1 40 2.8 1.1 1.1 60 4.1 1.1 1.0 80 5.5 1.1 1.1 100 6.9 1.1 1.1 125 8.6 1.1 1.1 150 10.3 1.1 0.
Bulletin 74.1:T205B Table 9. Type T205B Flow Capacities Spring Range and Color Outlet Pressure Setting 1 inch w.c. / 2.5 mbar Offset from Setpoint -1 to +2 inches w.c. / -2.5 to +5.0 mbar 1.0 to 2.5 inches w.c. / 2.5 to 6.2 mbar Orange 2.5 inches w.c. / 6.2 mbar -1 to +2 inches w.c. / -2.5 to +5.0 mbar Inlet Pressure 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size psig bar SCFH Nm3h SCFH Nm3h 1 0.07 434 11.6 603 16.2 2 0.14 708 19.0 852 22.8 4 0.28 1056 28.3 1204 32.
Bulletin 74.1:T205B Table 9. Type T205B Flow Capacities (continued) Spring Range and Color Outlet Pressure Setting 2.5 inches w.c. / 6.2 mbar 2.5 to 7.0 inches w.c. / 6.2 to 17 mbar Red 4 inches w.c. / 10 mbar 7 inches w.c. / 17 mbar Offset from Setpoint -1 to +2 inches w.c. / -2.5 to +5.0 mbar -1 to +2 inches w.c. / -2.5 to +5.0 mbar -2 to +2 inches w.c. / -5 to +5.
Bulletin 74.1:T205B Table 9. Type T205B Flow Capacities (continued) Spring Range and Color Outlet Pressure Setting 11 inches w.c. / 27 mbar Offset from Setpoint 20% droop 7.0 to 16.0 inches w.c. / 17 to 40 mbar Unpainted 15 inches w.c. / 37 mbar 20% droop Inlet Pressure 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size psig bar SCFH Nm3h SCFH Nm3h 1 0.07 272 7.3 340 9.1 2 0.14 453 12.1 458 12.3 4 0.28 679 18.2 696 18.7 6 0.41 879 23.6 920 24.7 8 0.55 1087 29.
Bulletin 74.1:T205B Table 9. Type T205B Flow Capacities (continued) Spring Range and Color Outlet Pressure Setting 0.5 psig / 34 mbar Offset from Setpoint 20% droop 0.5 to 1.2 psig / 34 to 83 mbar Yellow 1.2 psig / 83 mbar 20% droop Inlet Pressure Capacities in SCFH / Nm3h of Air 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size psig bar SCFH Nm3h SCFH Nm3h 2 0.14 412 11.0 449 12.0 4 0.28 660 17.7 674 18.1 6 0.41 834 22.4 844 22.6 8 0.55 1007 27.0 950 25.5 10 0.
Bulletin 74.1:T205B Table 9. Type T205B Flow Capacities (continued) Spring Range and Color Outlet Pressure Setting 1.2 psig / 83 mbar Offset from Setpoint 20% droop 1.2 psig to 2.5 psig / 83 to 172 mbar Green 2.5 psig / 172 mbar 20% droop Inlet Pressure 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size psig bar SCFH Nm3h SCFH Nm3h 2 0.14 296 7.9 313 8.4 4 0.28 474 12.7 497 13.3 6 0.41 619 16.6 621 16.6 8 0.55 748 20.0 730 19.6 10 0.69 893 23.9 831 22.
Bulletin 74.1:T205B Table 9. Type T205B Flow Capacities (continued) Spring RangE and Color Outlet Pressure Setting 2.5 psig / 0.17 bar Offset from Setpoint 20% droop 2.5 to 4.5 psig / 0.17 to 0.31 bar Light Blue 4.5 psig / 0.31 bar 20% droop Inlet Pressure Capacities in SCFH / Nm3h of Air 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size psig bar SCFH Nm3h SCFH Nm3h 4 0.28 407 10.9 418 11.2 6 0.41 555 14.9 557 14.9 8 0.55 645 17.3 679 18.2 10 0.69 800 21.4 804 21.
Bulletin 74.1:T205B Table 9. Type T205B Flow Capacities (continued) Spring Range and Color Outlet Pressure Setting 4.5 psig / 0.31 bar Offset from Setpoint 20% droop 4.5 to 7 psig / 0.31 to 0.48 bar Black 7 psig / 0.48 bar 20 20% droop Inlet Pressure Capacities in SCFH / Nm3h of Air 3/4 Inch / DN 20 Body Size 1 Inch / DN 25 Body Size psig bar SCFH Nm3h SCFH Nm3h 10 0.69 706 18.9 741 19.9 15 1.0 978 26.2 1003 26.9 20 1.4 1161 31.1 1237 33.2 40 2.8 1993 53.4 2012 53.
POSITION 1 (STANDARD) Bulletin 74.1:T205B POSITION 2 POSITION 3 POSITION 4 BODY POSITION A (STANDARD) B D C VENT POSITION Vent position POSITION 1 (STANDARD) POSITION 2 POSITION 3 POSITION 4 BODY POSITION Body position A (STANDARD) ERSA00746 Figure 4.
Bulletin 74.1:T205B 8.38 / 212.9 1/4 NPT VENT NPT 5.58 / 141.6 FLANGED 4.12 / 104.6 2.25 / 57.2 1/2 NPT CONTROL LINE CONNECTION 6.18 / 157 1.59 / 40.4 10.37 / 263.4 TYPE T205B WITH NPT END CONNECTION 14 / 355.6 8.07 / 205 MAXIMUM 7.19 / 182.6 TYPE T205B WITH FLANGED END CONNECTION SPRING ADJUSTMENT ASSEMBLY OPTION ERSA02735 Figure 5.
Bulletin 74.1:T205B Ordering Information When ordering, complete the ordering guide on this page. Refer to the Specifications section on page 2. Review the description to the right of each specification and the information in each referenced table or figure. Specify your choice whenever a selection is offered.
Bulletin 74.
