Specifications Pressure Rating Temperature Rating Actuator Pressure Orifice End Connections •  Type •  Size

Up to 300 psig (20.6 bar) 0 to 300°F (–17 to 148°C) 50 to 150 psig (3.5 to 10.3 bar) 0.052 to 0.110 in. (1.32 to 2.8 in.) Swagelok tube fitting, female NPT 1/16, 1/8, 1/4 in.; 3 mm

TT2B1 Normally Closed Module in CLOSED Position	TT2B1 Normally Closed Module in OPEN Position

• Include 316 stainless steel valve and actuator.
• Compact design reduces space requirements.
• Low internal volume enhances purging and cleaning and carries a smaller sample.
• Built-in pneumatic actuators in normally closed, normally open, double acting, and high-pressure normally closed models provide positive, repetitive shutoff with fewer potential leak points than conventional systems.
• Stainless steel construction provides enhanced corrosion resistance.

TT2B Models

• Modules assemble to provide shutoff or stream selection in process analyzer sample systems.
• Common vent ports enable detection and control of fugitive emissions and prevent mixing of system media with actuation media.
• TT2B1: Double block and bleed stream-select assembly with common bleed/vent port. 
• TT2B2: Double block and bleed stream-select assembly with integral bypass and common bleed/vent port.  
• TT2B3: Modular three-way switching stream-select assembly with common bleed/vent port.
• TT2B4: Two-module assembly with common actuator port and common vent port.

T2A1 Model 

• Positive, repetitive shutoff for gas or liquid service

• Two independently actuated shutoff valves are in one body with functions of a 3-way (switching) valve.
• Bidirectional flow is possible.
• All three ports can be open or closed at the same time.

• Three-shutoff-valve assembly is designed for use in continuous emissions monitoring systems (CEMS).
• Design allows reversing flow to clear a sample probe while simultaneously allowing calibration of an analyzer.

Testing
Every TT2 and T2 series valve is factory tested at room temperature with nitrogen at its maximum rated pressure. Block and bleed valve seals have a maximum allowable leak rate of 0.1 std cm³/min. Shell testing is performed on piston, cap, and module seals to a requirement of no detectable leakage with a liquid leak detector.

Cleaning and Packaging
All TT2 and T2 series valves are cleaned and packaged in accordance with Swagelok Standard Cleaning and Packaging (SC-10).

Accessories
TT2 and T2 module rebuild kits and TT2 module kits are available.