一、前言(略) 二、貨油閥和压载水閥控制系統的特点及其設計方面的考虑 1.本装置的特点 (1)本装置所控制的对象即阀,其数目非常多。阀数随油船的油舱数、泵的台数、管系布置方式的不同而异。但大体上说,每船有100～150只阀。然而,这些阀不一定全部用液压控制。 (2)被控制的阀,其分布的范围又非常广, First, the preamble (omitted) Second, the cargo valve and ballast valve control system features and design considerations 1. The characteristics of the device (1) The object of the device control valve, the number is very large. The number of valves varies with the number of tanker tanks, the number of pumps and the piping arrangement. But in general, there are 100 to 150 valves per boat. However, these valves are not necessarily all hydraulically controlled. (2) is controlled by the valve, the scope of its distribution is very wide,