TDI SPECYL: Reliable Gas Supply for High-Purity Specialty Applications

That’s why Rotarex developed the TDI SPECYL, an automatic switchover board with manual reset. Designed specifically for high-purity and corrosive gases, the TDI SPECYL ensures a continuous and secure gas supply, tailored to the needs of laboratories, research centers, and demanding industrial applications. 

Unlike other systems in the range, it is particularly suited for use with low-pressure gas cylinders and gases such as NH₃ (ammonia) and H₂S (hydrogen sulfide), making it an ideal choice for sensitive and corrosive gas applications. 

Why Choose the TDI SPECYL Changeover Board? 

1. Maximum Safety and Gas Integrity 

The TDI SPECYL is engineered entirely in stainless steel, with a PCTFE seat and a Hastelloy® diaphragm. These premium materials guarantee resistance to corrosion and compatibility with gases of up to 6.0 purity grade. 

The DUOBLOC technology allows up to six-cylinder connections without extensions, reducing leakage points and enabling independent purging with collection options. All supply and switchover boards come with relief valves as standard, ensuring safe operation. The inverter/bypass design prevents gas backflow, while dedicated pressure gauges (with optional alarm connection) enhance monitoring. And with an integrated gas monitoring system, you can conveniently track consumption right from your desk. 

By design, there is no risk of crossflow between gas sources. This ensures that each cylinder remains uncontaminated and the purity of your specialty gases is preserved at all times. 

2. Continuous Supply with Full Control 

Gas interruptions are simply not an option for critical applications. The TDI SPECYL features an automatic switchover mechanism that seamlessly transitions from one source to another when the primary cylinder is empty. 

At the same time, its manual reset function ensures that operators keep control of the supply chain: a key advantage when safety and accountability matter. This design provides the best of both worlds: uninterrupted gas flow combined with operator oversight. 

3. Ready-to-Use and Customizable 

Unlike systems that require assembly or multiple components, the TDI SPECYL is delivered pre-mounted on a board, making installation quick and easy. 

Its design is also highly adaptable: 

• Handles up to 4 cylinders without extension (up to 6 without purge line). 

• Can be fitted with a purge function, outlet shut-off valve, and a collectable tube on the relief valve. 

• Equipped with high and low-pressure gauges, with the option to add an alarm box that signals the status of the gas source. 

This flexibility allows laboratories and facilities to adapt the switchover board to their exact needs without unnecessary complexity. 

4. Versatile Applications -Including Ammonia (NH₃)- 

The TDI SPECYL is ideally suited for: 

• Supplying gas analyzers with stable and clean flows. 

• Creating and maintaining controlled atmospheres in research environments. 

• Serving laboratories and control units where safety and precision are critical. 

For even more specialized use cases, the TDI SPECYL is available in a dedicated ammonia version (NH₃), configured to operate at P1 = 8 bar / P2 = 3 bar, with a flow rate of up to 5 Nm³/h. This makes it a unique and reliable option for facilities working with ammonia. 

The TDI SPECYL is more than just a switchover board: it’s a comprehensive solution for high-purity and corrosive gas management. Its robust stainless-steel construction, advanced safety features, and plug-and-play design make it the trusted choice for laboratories, research centers, and industrial facilities that demand both purity and reliability. 

With an inlet pressure of up to 25 bar (363 psig) and an outlet pressure of up to 8 bar (116 psig), it delivers stable and secure performance, even in demanding environments. 

With the TDI SPECYL, you get peace of mind: 
✔ Continuous supply, no interruptions 
✔ Guaranteed gas purity and integrity 
✔ Easy installation and flexible configuration 
✔ Built to last, even in demanding environments 

Explore the full specifications and discover how the TDI SPECYL can support your applications here: Rotarex – TDI SPECYL