AL250-4TS, , DROP THROUGH VALVE, SIZE 250 [MM], ROUND FLANGES DN,, , FLANGE HOLE PATTERN DRILLED DIN PN10, MATERIAL BODY AND END, , COVERS IS CAST IRON EN-GJL-250. BORE AND END COVERS INTERNALLY, , TUNGSTEN CARBIDE COATED. OUTBOARD BALL BEARINGS SEALED FOR, , LIFE. VENT HOLES DRILLED AND PLUGGED. ADJUSTABLE BLADED ROTOR, , 9 BLADES REPLACEABLE MILD STEEL. SEMI END-DISK ROTOR, TUNGSTEN, , CARBIDE COATED ROTOR SHAFTS. ROTOR BLADES HARDENED STEEL, , REPLACEABLE, CHAMFERING ON THREE SIDES. AIR PURGE SHAFT SEAL, , MILD STEEL NICKEL PLATED NBR. PRESSURE REGULATOR FILTERSET, , FESTO 24VDC. VALVE CAPACITY AT 100% FILLING 19 [L/REV]. DIRECT, , DRIVE SEW RF57 IE3, 0.75 [KW], 21 [RPM], 220/380 [V], 50 [HZ], IP65., , ZERO SPEED SENSOR NON-DRIVE SIDE P&F 8VDC NAMUR 2 WIRE.