What is the difference between DB and DR in Rexroth cartridge valves? According to the paper, the area ratio of DB spool is 1: 1, and DR has pressure difference. Anyway, it is said to be 1: 1.

Rexroth LC series cartridge valves. Generally, Rexroth will provide cartridge valve model and supporting control cover model of cartridge valves. Different models have different control functions. The letter of credit .. DR spool is controlled by port A and LC .. DB is controlled by port B. This series of cartridge valves are controlled by two positions, and the spool ratio is 1: 1, that is, only the on-off or opening is controlled. For pressure difference control mode, LC..DB cooperates with cover model LFA .. DB to realize overflow control. Landing Craft)..DB and cover LFA..DZ(W) cooperate to realize sequence control. Landing Craft .. and Dr. Guy LFA .. DB cooperate to realize decompression control. Landing Craft)..DB and cover LFA..DR cooperate to realize decompression control. The pressure difference you mentioned may be related to the control mode of the cover plate. The ".." above indicates the spool size. Usually, the sizes of this series of valve cores are 16, 25, 32, 40 and other specifications. Different sizes have different maximum flow capacity.