可调导阀可以通过下游的出口压力并随它的变化而开大或关小其自身的小阀口，从而改变隔膜(活塞)上方控制室的压力值，控制方阀阀盘的调节位置。
使用，要注意选型。选型不当，会造成阻水和漏气现象。选用水力控制阀时，必须按设备每小时的耗汽量乘以选用倍率2-3倍为大凝结水量，来选择水力控制阀的排水量。
台湾EALY弋力叶片泵 台湾EALY弋力办事处
高压定量叶片泵 PV2R1-06 PV2R1-08 PV2R1-10 PV2R1-12 PV2R1-14
PV2R1-17 PV2R1-19 PV2R1-23 PV2R1-25 PV2R1-31
PV2R1-06-F-R PV2R1-08-F-R PV2R1-10-F-R PV2R1-12-F-R
PV2R1-14-F-R PV2R1-17-F-R PV2R1-19-F-R PV2R1-23-F-R
PV2R1-31-F-R PV2R1-06-F-L PV2R1-08-F-L PV2R1-10-F-L
PV2R1-12-F-L PV2R1-14-F-L PV2R1-17-F-L PV2R1-19-F-L
PV2R1-25-F-L PV2R1-31-F-L PV2R1-06-L-R PV2R1-08-L-R
PV2R1-10-L-R PV2R1-12-L-R PV2R1-14-L-R PV2R1-17-L-R
PV2R1-19-L-R PV2R1-23-F-L PV2R1-25-F-R
台湾EALY弋力叶片泵 台湾EALY弋力办事处
高压定量叶片泵PV2R2-26,PV2R2-33,PV2R2-41,PV2R2-47,PV2R2-53,PV2R2-59,PV2R2-65
PV2R2-26-F-R PV2R2-33-F-R PV2R2-41-F-R
PV2R2-47-F-R PV2R2-53-F-R PV2R2-59-F-R
PV2R2-65-F-R PV2R2-26-F-L PV2R2-33-F-L
PV2R2-41-F-L PV2R2-47-F-L PV2R2-53-F-L
PV2R2-59-F-L PV2R2-65-F-L PV2R2-26-L-R
PV2R2-33-L-R PV2R2-41-L-R PV2R2-47-L-R
PV2R2-53-L-R PV2R2-59-L-R PV2R2-65-L-R
PV2R2-26-L-L PV2R2-33-L-L PV2R2-41-L-L
PV2R2-47-L-L PV2R2-53-L-L PV2R2-59-L-L
PV2R2-65-L-L.
高压定量叶片泵 PV2R3-76 PV2R3-94 PV2R3-116
PV2R3-76-F-R PV2R3-94-F-R PV2R3-116-F-R
PV2R3-76-L-R PV2R3-94-L-R PV2R3-116-L-R
PV2R3-76-F-L PV2R3-94-F-L PV2R3-116-F-L
PV2R3-76-L-L PV2R3-94-L-L PV2R3-116-L-L
台湾EALY弋力叶片泵 台湾EALY弋力办事处
高压双联叶片泵PV2R12-26/31 PV2R12-33/10 PV2R12-41/23 PV2R12-59/31 PV2R12-53/17
PV2R12-41/23 PV2R12-47/23 PV2R12-33/19 PV2R12-59/31
PV2R12-59/12 PV2R12-65/28 PV2R12-59/23 PV2R12-33/33
PV2R12-31/26 PV2R12-53/28 PV2R12-65/28 PV2R13-52/31
PV2R13-60/28 PV2R13-66/25 PV2R13-76/23 PV2R13-94/19
PV2R13-116/31 PV2R13-8/52 PV2R13-66/14 PV2R13-23/116
PV2R13-94/23 PV2R13-116/28 PV2R13-94/25
PV2R23-52/116 PV2R23-60/33 PV2R23-66/41
PV2R23-53/66 PV2R23-65/116 PV2R23-53/94
PV2R23-116/63 PV2R23-66/53
才能保证水力控制阀在开车时能尽快排出凝结水，迅速提高加热设备的温度。水力控制阀排放能量不够，会造成凝结水不能及时排出，降低加热设备的热效率。