Material in low pirce means that your product has more competation in the market! As a leading manufacturer of hydraulic rotary actuator machinery, I'm pleased to inform you that we have been working with many big companies in Asia.Our product can be comparable with HELAC but the price lower than HELAC. we also have all kinds of valves , we can make as your requirement. We are in a good position not only to supply you high quality machinery, but also the excellent after sales service. Well-trained engineers will offer you any technical support. For more information , please email me diyi_wh02 126 com