The BS-B lubricator is used in cases where a lot of lubrication points shall centrally and reliably be supplied with lubricant. In connection with ZV-B distributors, the pump is predominantly used in dual-line lubrication systems. BS-B is also suitable for filling and lubrication system s. The lubricator consists of housing with a pump insert and a lubricant reservoir mounted on top. An integral pressure relief valve is incorporated in the pump insert. In dual line systems lubricant is delivered under pressure by means of electric or pneumatic control valves into a main feed line and towards the metering blocks distributing it uniformly and precisely metered to the points. Varying lubricant quantities can be handled by selecting different blocks.