POLMAK Co. LTD. has began manufacturing with polishing and emery machines by Hasan ÖZCAN in Karaköy-İstanbul in 1977.
These fans are in group of forward-curved (FC) blade fans. FC fan blades lean towards the rotation of the impeller. These fan give large amounts of air flow at low static pressures. However these fans work at the lower efficiencies.
Centrifugal roof fans are used for environments where air changes are necessary to keep to room ventilated and suction of vitiated air, flue gases and vapour.
Axial roof fans have axial impeller and this performs vertical flow.
These fans are in group of backward-curved (BC) blade fans. Belt-driven motor is used. These type fans’ blades lean backwards the rotation of the impeller. This fan’s performance characterized by high-efficiency, large air flow, rigid construction.
PO-R Medium Pressure Radial Fan 
PMZ Emery and Strip Sander Machines 
PMR Rolling Bearing Type 
PMY Oily Bearing Type 
P-HN Casing Fan with Backward-Curved Blade 
PY-K High Pressure Radial Fan 
PA-SK Type Axial Tubular Fan