• The surface painting instead of the surface galvanizing, which makes the multi-way valve more appealing and improves the corrosion resistance. • Effectively reduce pressure loss after valve body flow path optimization • Port safety valve LS relief valve has stable and reliable performance • The first unit can choose LS safety unloading valve, which is a high-performance electromagnetic ball valve with zero leakage and sufficient coil thrust, which effectively solves the influence of coil heating on electromagnetic thrust.