Description

MKS T3BIB-29916 Integrated High-Speed Vacuum Exhaust Throttle Butterfly Valve

Product Description

The MKS T3BIB-29916 belongs to the T3BI series, an all-in-one intelligent throttle butterfly valve integrating servo drive motor, built-in control electronics, position sensing and digital communication interface. It eliminates the requirement for a standalone external pressure controller, directly executing closed-loop vacuum pressure regulation for semiconductor and thin-film process chambers. The unit dynamically modulates the butterfly orifice opening to stabilize chamber pressure during deposition, etch, plasma cleaning and other critical vacuum processes. It accepts pressure transducer input, runs embedded PID auto-tuning algorithms, and reports valve status, position and process alarms to the host tool via serial communication. Designed for high responsiveness and repeatability, this integrated throttle valve reduces cabinet wiring, saves footprint and delivers consistent pressure control for high-volume fab production.

T3BIB-29916

Technical Specifications

Item	Parameter
Model	T3BIB-29916
Brand	MKS
Product Type	Integrated Vacuum Throttle Butterfly Valve
Power Supply	24 VDC ±10%, Max 100 W
Auxiliary Output	±15 VDC for Baratron capacitance manometer
Control Accuracy	0.25% of setpoint or 5 mV, whichever is greater
Control Range	0.0001% – 100% full scale, dual transducer capable
Response Time	Fast servo actuation, <1 second typical
Operating Temperature (Electronics & Motor)	0°C ~ +40°C
Operating Temperature (Valve Body)	0°C ~ +105°C (150°C optional high-temp version)
Storage Temperature	-20°C ~ +80°C
Sealing Material	Kalrez® / Chemraz® per process compatibility
Communication Interface	RS232 digital serial, analog 0–10 V I/O
Wetted Construction	Stainless steel valve plate, vacuum-rated sealing assembly
Mounting	Direct vacuum flange mounting to process chamber

Compatibility & Installation Traps

Compatibility

Designed to pair with MKS Baratron capacitance manometers and semiconductor process chamber platforms.
Compatible with T3BI configuration software for PID tuning, position calibration and fault diagnostics.
Works with tool host control systems supporting RS232 serial or 0–10 V analog pressure setpoint.
Not mechanically or firmware-interchangeable with older T2 or non-integrated T3 throttle valves; flange pattern and control logic differ.

Common Installation Traps

Incorrect torque on vacuum flange bolts leads to leaks, unstable pressure control and process drift.
Exceeding valve body temperature rating; high radiant heat from plasma chamber degrades Kalrez seals and causes premature leakage.
Miswiring the ±15 V gauge supply, which damages capacitance manometer sensors.
Ground loops introduced by separate grounding for the valve electronics and pressure gauge, resulting in noisy pressure readings and valve hunting.
Applying 24 VDC outside tolerance limits; overvoltage destroys onboard servo drive circuitry.
Skipping PID auto-tuning after replacement; default parameters cause slow response, oscillation or inability to hold setpoint.
Hot removal while chamber is under vacuum or powered; sudden pressure transients and residual charge can harm the servo motor and control board.
Using non-compatible elastomer seals for corrosive process gases; chemical attack generates particles and seal failure.

Standard Operating Procedure (SOP)

Pre-inspection: Examine T3BIB-29916 for flange scratches, seal damage, connector deformation and visual signs of motor wear. Confirm model number and revision match the original unit.
Lockout and isolation: Activate tool EMO, shut down 24 VDC supply, isolate process gas, vent the vacuum chamber and confirm zero pressure and zero energy state.
ESD and PPE preparation: Wear ESD wrist strap and cleanroom gloves to protect electronics and vacuum sealing surfaces.
Disassembly: Label serial, analog, power and gauge wiring. Release flange fasteners in a cross pattern and separate the throttle valve from the chamber.
Mount replacement valve: Install new T3BIB-29916 with fresh vacuum seal, tighten flange bolts evenly following OEM torque sequence.
Utility reconnection: Reconnect 24 VDC power, Baratron gauge lines, RS232 communication and analog I/O cables; verify pinout against wiring labels.
Leak check and power-up: Pump down the chamber, perform helium leak test on the flange joint, then restore DC power and establish host communication.
Calibration and tuning: Run valve home position calibration, execute PID auto-tuning, validate pressure setpoint tracking and alarm thresholds.
Process qualification: Run monitor wafer test to confirm pressure stability, log parameters and return the process tool to production.