Mechanical seal of the ALLWEILER pump R-M3.ALW - used for screw pumps ALLWEILER BAS, ZAS, ZASV, SPF10, SPF20. Mechanical seal with conical spring and O-ring for shaft sizes 15 and 20 mm. Materials of execution R-M3.ALW can be for various fields of use, in particular when working with oil, fuel and chemically active compounds. Analogue Vulcan 8W, Aesseal T01A, Aesseal T01A, Burgmann M377 Special.