H2 Gas Tube Furnace with Alumina Tube and H2 Detector

This Hydrogen Gas tube furnace is designed for processing material under hydrogen gas up to 1700°C safely. The 60 mm OD processing tube is made of pure alumina, and one hydrogen gas detector is included for cutting off hydrogen gas via a built-in solenoid valve immediately upon detection of hydrogen gas leaks. The furnace can be used with all kinds of inert gasses and oxygen gas as well. The precision temperature controller provides up to 30 programmable segments for the heating profile. This device is specifically designed for wet hydrogen treatment of materials to achieve partial oxidation of the material surface, while also conducting various CVD experiments. If there is a hydrogen dew phenomenon (10% of the hydrogen explosion point) during the experiment, the hydrogen detector will generate an alarm signal, ensuring that the entire experiment is conducted in a safe environment.

Features

Hydrogen use up to 100 % purity

Afterburner and flooding tank safety systems

All safety provisions for Hydrogen operation

Reduction of Oxygen by inert gas purging

Automatic operation

Data recording for quality management

Application Examples

annealing, brazing, ceramic injection moulding (CIM), debinding, degassing, drying, metal injection moulding (MIM), pyrolysis, quenching, rapid prototyping, sintering, soldering, sublimation, synthesis, tempering

SPECIFICATIONS

Furnace Structure	Double layer steel casing with air cooling to keep furnace surface temperature lower than 60°C. High purity fibrous alumina insulation for Max. energy saving. Hydrogen detector and solenoid valve are included for safe operation. The hydrogen gas furnace must be placed under a fume hood.
Power	3 KW Max. ( 20A breaker required)
Voltage	AC 208-240 Single Phase, 50/60 Hz
Max. Temperature	1700°C ( < 1 hour )
ContinuousTemperature	1600°C
Max. Heating Rate	<= 10°C /min (5C/min is recommended to avoid thermal-shocking the alumina tube)
Processing Tube	High purity Al₂O₃ ceramic tube, Purity > 95% 51 mm (I.D) x 60 mm (O.D) x 800 mm length. Two fibrous ceramic tube blocks are included for blocking heat radiation from inside the tube (Ceramic blocks must be fully inserted into the furnace chamber before heating). environment and higher vacuum efficiency. For 60mm tubes, it is recommended that customers purchase two pairs of tube support to prevent the tube from bending under high temperature
Heating Zone length	125 mm (5″)
Constant temp. zone	50 mm (2″) within ± 2°
Temperature controller	PID automatic control via SCR (Silicon Controlled Rectifier) power control with phase angle fired, current limiting resistor. 30 programmable segments for precise control of heating rate, cooling rate and dwell time. Built-in over-temperature alarm and protection allow for operation without an attendant. +/- 1 ºC temperature accuracy. RS485 Communication Port. MET certified 30 programmable segments for precise control of heating rate, cooling rate and dwell time. Built-in PID Auto-Tune function with overheating & broken thermocouple protection. Over-temperature protection and alarm allow for operation without attendant(s). +/- 1 ºC temperature accuracy. RS485 Communications Port. Advanced Temperature Control (Optional) Temperature control software kit + 15″ laptop package is available at the options bar.
TemperatureAccuracy	+/ – 1°C
Flanges and Gas Inlet	One pair stainless steel vacuum flange is installed on two ends of the tube which allow high vacuum up to 10E-5 torr and 5 PSI positive pressure. One solenoid valve is installed on the left of the flange for Hydrogen gas inlet. It connects with hydrogen detector. Once hydrogen gas leak is detected (10% below hydrogen explode point), gas inlet valve will be shut down immediately. One pressure gauge is installed on the end of the gas inlet. Hydrogen gas pressure must be controlled under 5 PSI, which can be adjusted by a stainless steel needle valve.
Gas-outlet & Flowmeter	One 16 -160 ml/min floating meter is installed on gas-outlet end for adjusting the gas flow rate. 1/4″ Dia stainless steel tube is installed for burning hydrogen gas during gas flowing. One long lighter is included in the standard package for igniting hydrogen gas manually. One 6″ long neck flexes safe lighter is included for lighting hydrogen gas.
Hydrogen Detector System	One Honeywell UL Approved Sensepoint Gas Detector is Integrated into the system. Working Temperature Range: 40ºF to +149ºF (-40ºC to +65ºC) Alarm Point: H2 Limited Explosive Line 20% (20% LEL). Once detecting H2 gas beyond the point, it will shut off the inlet valve to the H2 automatically.
Heating Element	Super 1800 grade MoSi2 heating element (30 x 270mm)
Furnace Dimension	445 x 380 x 615 mm (17.5″ x 15.0″ x 24.5″)
Warning learn more about the installation of a gas regulator.	The tube furnaces with alumina tube are designed for using under vacuum and low pressure < 0.02 MPa / 0.2 Bar/ 3 PSI Attention: A two-stage pressure regulator must be installed on the gas cylinder to limit the pressure to below 3 PSI for safe operation. Never heat the furnace while the gas release valve is closed and a positive pressure condition exists within the furnace chamber. The pressure gauge must be used to closely monitor the chamber condition at all times during the heating process; please open the gas release valve immediately once the chamber pressure has reached over 3 PSI to prevent unforeseeable damages. The flow rate for gasses should be limited to < 200 SCCM ( or 200ml/min ). The furnace must be placed under the fume hood For first-time buyers, Safe operation training is required at Hengtong facility free of charge.