Siemens adds stainless steel Intelligent Valve to its direct-to-chip liquid cooling range

Siemens said on 11 November 2026 in Zug, Switzerland, that it has added to its liquid cooling range an Intelligent Valve made of stainless steel, for the rack cooling loops of direct-to-chip systems in AI data centres and high-performance computing.

Siemens offers the stainless steel design instead of brass or other materials, and says it meets the increasingly strict requirements that leading chipmakers and hyperscale operators set for wetted materials, the parts in contact with the coolant, as coolant purity and compatibility with the cooling medium grow in importance.

Installed in the hydronic cooling circuit, the valve measures flow, temperature and how the system performs while it actively controls hydronic conditions, according to Siemens. At rack level it keeps differential pressure stable, which the company says keeps coolant flow consistent and protects IT equipment, and it lowers the chance of pressure spikes damaging cold plates or causing leaks while the system is commissioned, run or maintained. Siemens says the valve also adjusts by itself when servers or entire racks go in, come out or are swapped.

The valve has its own local control loops, which can work independently of the controller in the coolant distribution unit, Siemens says. Presetting happens automatically and the communication interfaces are open, which the company says speeds commissioning and makes the valve easier to connect to wider automation and monitoring systems. Siemens says it works with plain water and with water mixed with ethylene glycol or propylene glycol.

Nawfal Slimati, executive vice president of Buildings Products at Siemens, says AI is changing data centres' thermal requirements and that rising compute density is making liquid cooling a core part of their infrastructure. Siemens says the valve adds to its other liquid cooling products in hydronics, sensing, automation and digital simulation.