The LM81 series is a basic product of the LM8 high-pressure single seat control valve series, which is a top guide, plunger type high-pressure single seat pressure imbalance structure. Adopting a new type of direct pressure floating valve seat, it has the characteristics of high control accuracy, good sealing performance, simple structure, and strong universality. The use of porous pressure sleeves greatly improves the anti cavitation and noise reduction performance of the internal components. Suitable for fluid control under harsh working conditions.