Hi Henry,

I very much doubt if you will source a rotary valve that would operate at these temperatures due to thermal expansion of the rotor/housing. Have you considered screw conveyors, mass flow meters?

Regards,

Dave. ■

Henry,

Our company has supplied numerous high temperature rotary valves in excess of 1,000 F. Key to succesful operation is selecting correct materials, bearing arrangements, heat shields and allowing for thermal expansion.

Please contact us for more information.

sales@carolinaconveying.com

www.carolinaconveying.com

Thanks, Paul Golden ■

Dear friends .

We have designed built and used high temperature rotary valves, for some 15 years now.

These valves are large 24 inch inlet, off center rotor with cluster breaking 3000 kg mt torque. Due to the rotor design, they have low particle breakage and hardly any vibration. They are installed in Venezuela, Russia, Mexico and India. They are not intnded to seal pressure, nor to have any pressure drop through the rotor, as they have wide clearances. The rotor shaft is water cooled. Some of them have refractory lining inside; others, have their body water-cooled. We have used incoloy rotors and also 304 Stainless Steel. You have to be careful with the welds and with the overall design as thermal expansion, during heating-up, and cooling, can break the rotor apart. You also have to be careful with your water jackets as stresses and thermal expansion can also cause leaks. Hard lining is applied to the surfaces exposed to abrasion and every year they have to undrgo repairs. Most of these valves work at rates higher than 100 tons/hour, and, if you are interested, you can contact HYL Steel Technology. I believe they have a site

I hope this is helpful,

Regards,

Marco Flores ■