T205 Series Tank Blanketing Regulators Figure 1. Type T205 Tank Blanketing Regulator Contents Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Overpressure Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Capacity Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Features Low-pressure setting and fast speed of response – T205 Series regulator has a low-pressure setting as low as 1 in. 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. Arctic Temperatures – Constructions for process temperatures as low as -76°F / -60°C available by request. 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. FDA/USP Class VI – Types T205 and T205M can be used in applications requiring clean regulator solutions. Constructions available with FDA and USP Class VI approved elastomers. Easy conversion between constructions – Converts easily from the Types T205 and T205M to the Types T205H and T205HM with two O-rings and one machine screw. Sour gas service capability – Available construction to meet NACE MR0175-2002. Introduction T205 Series tank blanketing regulator is a direct-operated and spring-loaded regulator (Figure 1). The regulator prevents a stored liquid from vaporizing into the atmosphere, reduces liquid combustibility and prevents oxidation or contamination of the product by reducing its exposure to air. T205 Series maintains a slightly positive pressure and thereby reduces the possibility of tank wall collapse during pump out operation. T205 Series is available in two configurations: Types T205 and T205H for internal pressure registration and Types T205M and T205HM for ex

T205 Series 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 in. 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: Similar...

T205 Series VALVE DISK LEVER PUSHER POST PIPE PLUG PITOT TUBE INLET PRESSURE CONTROL SPRING OUTLET PRESSURE ATMOSPHERIC PRESSURE Figure 2. Type T205 with Internal Registration Operational Schematic VALVE DISK O-RING STEM SEAL PUSHER POST CONTROL LINE CONNECTION THROAT SEAL TYPE Y602-1 VENT INLET PRESSURE OUTLET PRESSURE CONTROL SPRING ATMOSPHERIC PRESSURE Figure 3. Type T205M with External Registration Operational Schematic

T205 Series 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

T205 Series Table 1. Body Sizes, End Connection Styles and Maximum Allowable Inlet Pressure BODY SIZE MAXIMUM ALLOWABLE INLET PRESSURE BODY MATERIAL Gray cast iron LCC Carbon steel CF8M/CF3M Stainless steel 1. All flanges are welded. Weld-on flange dimension is 14 in. / 356 mm face-to-face. 2. Pipe nipples and flanges are 316 Stainless steel for flanged body assemblies. 3. Inlet pressure is limited to 150 psig / 10.3 bar for Types T205H and T205HM. Table 2. T205 Series Maximum Operating Inlet Pressure MAXIMUM OPERATING INLET PRESSURE(1) ORIFICE SIZE 1 to 2.5 In. w.c. / 2.5 to 6.2 mbar Outlet...

T205 Series 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. 1.00 Correction Factor = SG 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 T205 Series regulator. To achieve the published capacities at low setpoint, the spring case barrel should be installed pointed down...

T205 Series Table 7. Flow Capacities of Types T205 and T205H with 3/4 in. / 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, In. / mm 1/8 / 3.2 - Shaded areas indicate where maximum operating inlet pressure for a given orifice size is exceeded.

T205 Series Table 7. Flow Capacities of Types T205 and T205H with 3/4 in. / 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, In. / mm 1/8 / 3.2 - Shaded areas indicate where maximum operating inlet pressure for a given orifice size is exceeded.