What's the difference between the h76x check valve h77x?
Check JB/T308-2004 "valve type programming method"The first number 7 is the clip typeThe 6 is a double valve swing structure7 butterfly check valveLook at the JB/T8937-2010 "clip on check valve"That's clear
H76x check valve h77x distinction: h76x check valve is a clamp type double valve swing structure, h77x is the clamp butterfly type structure.
