Stainless steel needle valve body etc are larger and brass pin type valve, because generally make type stainless steel needle valve With temperature is higher, the pressure is high, so ball valve manufacturer in the central stuffing box design this doing is higher, in case of leakage with the rising of middle pressure and temperature. And brass type needle valve structure is simple, do not need...

Type needle valve actuating device according to the output shaft is divided into many rotary movement way, part of the rotary and linear reciprocating 3 kinds. Rotary rotary is more circle, more suitable for the stem or stem nut need revolving circle in order to fully open or close the valve, such as gate valve, globe valve, the output torque value of series of 40 ~ 10000), commonly (thrust is...