The coupling is divided into unidirectional shunts, with 2-10 oil outlets and a total of eight sizes. Wide range of applications.Ф4 main oil pipeline relays and diverts through it, and its inlet and outlet are threaded at both ends of M8*1, and the relay is used by M8*1 oil pipe joint and 4mm duo cone ferrule, and the end interface of the system is closed by M8*1 plug. The resistant DPC and DPV series dosimeters deliver oil directly to the lubrication point via this connection, and if there is an excess connection, it can be closed with an M81 plug. DPC and DPV series of measuring parts directly connected to the lubrication point of the equipment. Through it relay and divert, it should be connected with Ф4 tubing, M8*1 tubing fittings and 4mms duo-cone ferrule.