THE MANUAL PUMPS PRD  ‐  13 ARE SUPPLIED FOR CENTRALIZED LUBRICATION SYSTEM WITH OIL WHERE VOLUMETRIC METERING UNITS ARE USED. THE PUMPS ASSEMBLY ARE LOCATED ON THE BOTTOM OF THE RESERVOIR AND THE VERTICAL LEVER COMES BACK BY MEANS OF A SPRING.  BEFORE TO USE AGAIN THE VERTICAL LEVER HAS TO BE AWAITED MINIMUM 15/20 SECONDS TO HAVE A CORRECT WORKING OF THE SYSTEM. THE PUMPS ARE PROVIDED WITH A SET OF VALVES WHICH CARRIES OUT PRIMING, RELEASING AND RELIEVING. THEY ARE PROVIDED WITH SUCTION STRAINER AND STRAINER FILLER CUP.