Beijing North Zhongyi Heavy Machinery Co., Ltd. : Safety of crane speed limit (5)There are two kinds of oil leakage of hydraulic components: internal leakage and external leakage. L....

2021-06-04View+

Beijing North Zhongyi Heavy Machinery Co., Ltd. : Safety of crane speed limit (4)(2) balance valve in series in the oil return circuitIn essence, the balance valve is a combination ....

2021-06-04View+

Beijing North Zhongyi Heavy Machinery Co., Ltd. : Safety of crane speed limit (3)If the spool adopts ball valve type or slide valve type, the leakage will still be inevitable, that ....

2021-05-27View+