T205 Series Tank Blanketing Regulators Figure 1. Type T205 Tank Blanketing Regulator Low-pressure setting and fast speed of response – T205 Series regulator has a lowpressure setting as low as 1 inch w.c. / 2.5 mbar. It can respond quickly to downstream flow demand and pressure changes due to direct-operated structure. Accurate control and small lockup pressure – Large diaphragm area provides very accurate throttling control at low pressure settings. An added benefit of lever style regulator is that it can shut off the process fluid using small lockup pressure. Multiple applications – T205 Series regulator can be used for a wide variety of gases including air, nitrogen, natural gas, sour gas (NACE Construction), butane and propane. Corrosion resistance – Multiple regulator constructions are available in a variety of materials for compatibility with corrosive process gases. Sour gas service capability – Available construction to meet NACE MR0175-2002. Easy conversion between constructions – Converts easily from the Type T205 to the Type T205M with two O-rings and one machine screw.

Bulletin 74.1:T205 Specifications The Specifications section on this page provides the ratings and other specifications for the T205 Series. Factory specification such as type, maximum inlet pressure, maximum temperature, maximum outlet pressure, spring range and orifice size are stamped on the nameplate fastened on the regulator at the factory. Product Configurations Type T205: Tank blanketing regulator with outlet pressure range of 1 inch w.c. to 7 psig / 2.5 mbar to 0.48 bar in seven different spring ranges and has internal pressure registration requiring no downstream control line. Type T205M:...

Bulletin 74.1:T205 VALVE DISK STEM LEVER PUSHER POST PIPE PLUG PITOT TUBE CONTROL SPRING INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE Figure 2. Type T205 with Internal Registration Operational Schematics VALVE DISK O-RING STEM SEAL PUSHER POST CONTROL LINE CONNECTION THROAT SEAL INLET PRESSURE CONTROL SPRING OUTLET PRESSURE ATMOSPHERIC PRESSURE Figure 3. Type T205M with External Registration Operational Schematics

Bulletin 74.1:T205 HORIZONTAL PIPELINE VENT POINTED DOWN DOWNSTREAM CONTROL LINE HORIZONTAL PIPELINE INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE DOWNSTREAM CONTROL PRESSURE Figure 4. T205 Series Actuator Casing Drainage Schematic POSITION 3 POSITION 1 (STANDARD) BODY POSITION D POSITION 3 POSITION 1 (STANDARD) BODY POSITION C A (STANDARD) VENT POSITION POSITION 3 BODY POSITION BODY POSITION Figure 5. Body and Vent Orientation C

Bulletin 74.1:T205 Table 1. Body Sizes, End Connection Styles and Maximum Allowable Inlet Pressure BODY SIZE MAXIMUM ALLOWABLE INLET PRESSURE BODY MATERIAL Gray Cast Iron 1. All flanges are welded. Weld-on flange dimension is 14 inches / 356 mm face-to-face. 2. Pipe nipples and flanges are 316 Stainless steel for flanged body assemblies. Table 2. Maximum Operating Inlet Pressure ORIFICE SIZE MAXIMUM OPERATING INLET PRESSURE 1 to 2.5 in. w.c. / 2.5 to 6.2 mbar Outlet (Control) Pressure Setting 2.5 to 7 in. w.c. / 6.2 to 17 mbar Outlet (Control) Pressure Setting 7 to 16 in. w.c. / 17 to 40 mbar...

Bulletin 74.1:T205 Table 5. Flow Coefficients ORIFICE SIZE FLOW COEFFICIENTS (WIDE-OPEN) Table 6. Correction Factors (For converting Air Flow Rates to Other Gas Flow Rates)(1) BLANKET GAS SPECIFIC GRAVITY CORRECTION FACTOR 1. For gases of other specific gravities, use equation below. Correction Factor = Installation The regulator may be installed in any position as long as the flow through the body is in the direction indicated by the arrow on the body when using a Type T205 or T205M regulator. To achieve the published capacities at low setpoint, the spring case barrel should be installed pointed...

Bulletin 74.1:T205 Table 7. Flow Capacities of Type T205 with 3/4-inch / DN 20 Body Size SPRING RANGE AND COLOR OUTLET PRESSURE SETTING OFFSET FROM SETPOINT INLET PRESSURE CAPACITIES IN SCFH / Nm3/h OF AIR Orifice Size, Inch / mm 1/8 / 3.2 - Shaded areas indicate where maximum operating inlet pressure for a given orifice size is exceeded.

Bulletin 74.1:T205 Table 7. Flow Capacities of Type T205 with 3/4-inch / DN 20 Body Size (continued) SPRING RANGE AND COLOR OUTLET PRESSURE SETTING OFFSET FROM SETPOINT INLET PRESSURE CAPACITIES IN SCFH / Nm3/h OF AIR Orifice Size, Inch / mm 1/8 / 3.2 - Shaded areas indicate where maximum operating inlet pressure for a given orifice size is exceeded.

Bulletin 74.1:T205 Table 7. Flow Capacities of Type T205 with 3/4-inch / DN 20 Body Size (continued) SPRING RANGE AND COLOR OUTLET PRESSURE SETTING OFFSET FROM SETPOINT INLET PRESSURE psig 1 Orifice Size, Inch / mm 1/8 / 3.2 - Black areas indicate where desired flow capacity is not obtainable for a given inlet pressure. - Shaded areas indicate where maximum operating inlet pressure for a given orifice size is exceeded.

Bulletin 74.1:T205 Table 7. Flow Capacities of Type T205 with 3/4-inch / DN 20 Body Size (continued) SPRING RANGE AND COLOR OUTLET PRESSURE SETTING OFFSET FROM SETPOINT INLET PRESSURE CAPACITIES IN SCFH / Nm3/h OF AIR Orifice Size, Inch / mm 1/8 / 3.2 Light blue - Shaded areas indicate where maximum operating inlet pressure for a given orifice size is exceeded.

Bulletin 74.1:T205 Table 8. Flow Capacities of Type T205 with 1-inch / DN 25 Body Size SPRING RANGE AND COLOR OUTLET PRESSURE SETTING OFFSET FROM SETPOINT INLET PRESSURE psig 1 2 Orifice Size, Inch / mm 1/8 / 3.2 - Shaded areas indicate where maximum operating inlet pressure for a given orifice size is exceeded.

Bulletin 74.1:T205 Table 8. Flow Capacities of Type T205 with 1-inch / DN 25 Body Size (continued) SPRING RANGE AND COLOR OUTLET PRESSURE SETTING OFFSET FROM SETPOINT INLET PRESSURE CAPACITIES IN SCFH / Nm3/h OF AIR Orifice Size, Inch / mm 1/8 / 3.2 - Shaded areas indicate where maximum operating inlet pressure for a given orifice size is exceeded.

Bulletin 74.1:T205 Table 8. Flow Capacities of Type T205 with 1-inch / DN 25 Body Size (continued) SPRING RANGE AND COLOR OUTLET PRESSURE SETTING OFFSET FROM SETPOINT INLET PRESSURE CAPACITIES IN SCFH / Nm3/h OF AIR Orifice Size, Inch / mm 1/8 / 3.2 2.0 1.2 to 2.5 psig / 83 to 172 mbar Green - Shaded areas indicate where maximum operating inlet pressure for a given orifice size is exceeded.