type needle valve drive device is the use of additional power type needle Industrial Valves opening and closing device. Use the drive device is designed to make the Industrial Valves easy operation convenient, fast and reliable, or automatic control and remote control. Basic requirements for the valve actuation device is: torque or force can meet the needs of the opening and closing of the valve, the stroke and the torque control precise and reliable, suitable for dynamic selection of site condition, opening and closing action conform to the requirements of the control, light and small device itself.

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 the series of 40 ~ 10000 cattle meters (commonly The thrust of 20 ~ 1. 1 million cows) 。 Part of rotary is suitable for the stem within a circle in the rotation can be fully open or close the valve, such as ball valve, butterfly valve, the output torque of the series is generally 125 ~ 125000). Linear reciprocating applicable to stem only do linear reciprocating motion can be fully open or close the valve, such as needle valve.

type needle valve actuating device according to the power source can be divided into manual gear, gear, pneumatic device, electric actuator, hydraulic device, gas-liquid linkage, electro-hydraulic linkage and so on. One of the most primitive and simple valve actuator is the handwheel, handle. As the needle valve type more and more of the production process automation, for a variety of needle valve drive device needs more and more. Needle valve drive occupies an important position in the industrial production automation.

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