Description
Young Industries manufactures the Model LH and Model HC Drop-Thru Rotary Valves to handle a wide variety of powders. When the application requires it, Our Valves can be supplied with design features to comply with NFPA 69 Standards for Close-Clearance Rotary Valves. These Rotary Valves are engineered to meet the process conditions in which the valve will be used. Our Application Engineers are trained to assist the user and work with the user’s AHJ (Authority Having Jurisdiction) to be sure the equipment meets with plant safety requirements. We have both ASME U & UM certifications and we design and manufacture pressure containment Rotary Valves over 15 PSIG when the application requires it.
Application Information
We manufacture NFPA compliant Close-Clearance Rotary Valves to the exact need of the application. These valves are used to isolate a deflagration from adjoining equipment by flame quenching. The design basis for the rotary valve will include the specific (Kst and Pmax) values of the powder being handled. The Rotary Valve housing and rotor will be designed based on the maximum anticipated explosion pressure (Pred) for those applications where the valve is isolating an enclosure protected by deflagration venting or suppression.
When these rotary valves are used as an isolation valve for an enclosure that has no deflagration venting or suppression, it is designed based on calculations outlined in NFPA 69 standards.
These Rotary Valves are not used as an isolation device for systems handling hybrid mixtures. Our NFPA compliant Rotary Valves are used for powders with ST-1 and ST-2 dust classifications with a Pmax of 174 PSIG or less.