, Properties and Uses: 1, used to throttle the speed of adjustment control of the hydraulic system of the implementing agencies, the loop line pressure should be approximately constant, through this valve flow minor fluctuations due to pressure changes due to the balanced structure a high total amount of high pressure is also easy to adjust with one-way valve device makes reverse flow through freely. Second, product technical parameters: 1, the rated flow into the oil outlet pressure drop the 3bar measured probably flow. Throttle characteristics, the structure is relatively simple, easy to manufacture and maintenance, and low cost. Throttle regulation accuracy is not high, can not be adjusted using the. 3, the sealing surface erosion, the media can not be cut off. 4, tightness poor.