The LN82 series is one of the two basic products of the LN8 series pressure unbalanced structure. The liner and valve seat are dual guided, with high flow capacity and excellent dynamic stability. The design of porous cylindrical valve core achieves reasonable separation between throttling and sealing surface, and the sealing surface is not directly eroded by high-speed fluid, with good and reliable sealing performance. Enable it to achieve the purpose of preventing flash evaporation, cavitation, and noise reduction. Suitable for controlling clean media with fast flow rates, especially for gases with higher pressure differentials.