描述HC3 - D是HC3的变体,一端的所有端口。整个图案是一种小馅饼设计。它是一个只有1.75千克的紧凑型单位。HC3-D具有作为标准特征的试验卸载阀。标准版本中的最大出口压力为800巴。通过改变所提供的压力来进行出口压力的调节。功能基本操作在功能图中示出。通过连接阀KV1,KV2和DV自由地流动的HC3-D的连接板进料到HC3-D的港口,从高压侧H流过。来自高压侧H油被送入到端口A上连接板。在这种情况下,通过助力器的最大流动实现快进功能。 When pump pressure is reached on the high-pressure side H, valves KV1, KV2 and DV will close. The end pressure will be achieved by the oscillating pump unit OP. The unit will automatically stall when end pressure on the high-pressure side is reached. If a pressure drop on the high-pressure side exists due to consumption or leakage, the OP valve will automatically operate to maintain the end pressure.