YHF hydraulic valve

YHF hydraulic valve (20MPa) First, the conditions of use for the electric ring lubrication system, the grease pump output is sent to the two alternate charge of oil. Directly by the pressure control valve commutation charge of oil at the end of the commutation of the set pressure can be easily adjusted, simple valve structure, reliable operation. Second, the technical parameters Model nominal set pressure Mpa Mpa pressure adjustment range weight loss kg standard pipe size model of the original model YHF-L1 RV-3 20 5 3-6 17 Rc34 46.5 YHF-L2 RV-4U 2.7 M16x1.5 7 using the medium for Penetration 265 ~ 385 (25 ℃, 150g) 1 / 10mm grease. Third, the model Marking explanation four, works right is a schematic diagram of the working principle of the hydraulic valve. Figure T1 ~ 4 口 sink into the same outlet connected to the accumulator. Position 1 grease pump output from the inlet port through the main spool passage S MP constituted charge of oil sent to L1 (pipeline Ⅰ), and increase the pressure Pp is fed via the pilot spool constituted the main spool left. L2 is open to the charge of oil through the oil reservoir T1 port. Charge of oil terminal L1 is connected to the return port R1, when the pressure exceeds the set pressure of the end, put the pilot spool to the right. Position 2 Pp pilot spool moves to the right, the left chamber of the main spool Mp through T3 port open to the oil reservoir, grease pump output pressure at the right end of the main spool, which was pushed to the left, and the main indicator lever contacts the spool of the Impact limit switch LS, sends a signal to the cabinet to stop the pump. Position 3 Mp main spool moves to the left, to complete passage through the main spool constitute grease commutation action, pump output charge of oil again sent to the L2 (pipeline Ⅱ), oil executives L1 through T2 mouth open to the oil reservoir. Five, six dimensions, the use of YHF-L1-type valve and flow 585mL / min pump match, mounted on the base plate. YHF-L2-type valve and flow 60 and 195mL / min pump match, mounted on the pump body. YHF-L1-type valve adjustment screw clockwise to increase the set pressure, L down. YHF-L2 D-type valve set pressure lowering, L increase. When removing YHL-L2-type valve and valve disassembly YHF-L1 of the lid from the body, it should first adjustment screw completely loose.