The "UPR" rotary valve is particularly suitable for the dosing and pneumatic transportation of granular, flaky or ground products. Thanks to its sturdy construction and flanging unified according to UNI PN10 standards (DIN 2576 ND10) or ANSII50 standards it is particularly suitable for use in both heavy industry and in the chemical and plastic industrial fields. The special confirmation of the entrance inlet and a series of other technical adaptations reduce the risk of the pinching of the product between the blade and stator in cases in which particularly different products need to be discharged. The external bearing slots and the packing PTFE packing gland sealing system, provide further guarantees of rational performance and also make it possible to use the valve at high temperatures.