WAM Polska Sp.z o.o. Ul. Główna 28 , Kruszyn , Bolesławiec 59-700 Poland Environmental XPRT Downloads About Solutions products Publications videos Downloads Home breadcrumb Companies WAM Polska Sp.z o.o. Products 1 products found WAM Polska Sp.z o.o. Products Rotary Valves - Rotary Feeders WAM - Model RV - RVR - Drop-Through Rotary Valves RV/RVR Rotary Valves are the ideal solution for controlled discharging and feeding of powdery or granular materials from silos, hoppers, pneumatic conveying systems, bag filter houses, or cyclones.