the valve drive way

according to the driving mechanism of the movement way, in the valve actuator stroke and stroke two kinds.

according to the drive structure, the Industrial Valves actuation device is divided into:

1, the diaphragm type

2, cylinder type

1) piston cylinder type

(2) piston rack type

(3) piston rod

(4) piston fork type

5) piston screw

3, vane

4, air engine

5, thin films and ratchet combined

hydraulic drive hydraulic cylinder type hydraulic motor type linkage drive electro-hydraulic linkage

the valve drive for manual drivers handle hand wheel (

Including through intermediate gear reduction) 、弹簧杠杆式、电动驱动、电磁式、电动机式、气动驱动

各类阀门驱动装置的特点

电动装置优点

1、适用性较强，不受环境温度影响

2、输出转矩范围广

3、控制方便，能自由地采用直流、交流、短波、脉冲等各种信号，适于放大、记忆、逻辑判断和计算等工作

4、可实现超小型化

5、具有机械自锁性

6、安装方便

7、维护检修方便

电动装置缺点

1、结构复杂

2、机械效率低，一般只有25%～60%

3、输出转速不能太低或太高

4、易受电源电压、频率变化的影响

液动装置优点

1、结构简单、紧凑、体积小

2、输出力大

3、容易获得低速或高速，能无级变速

4、能远距离自动控制

5、由于液压油的黏性而效率较高，有自润滑性能和防锈性能

缺点

1、油温变化引起油粘度的变化

2、液压元件和管道易渗漏

3、陪管，维修不方便

4、不适于对于信号进行各种运算

气动装置优点

1、结构简单

2、气源容易获得

3、能得到较高的开关速度

4、可安装调速器，使开关速度按需要进行调整

5、气体压缩性大，关闭时有弹性

缺点

1、与液动装置相比结构较大，不适于大口径高压力的阀门

2、因气体有压缩性，所以速度不易均匀

阀门驱动方式的选择

阀门驱动方式的选择依据是：

阀门的形式、规格与结构。

the Industrial Valves opening and closing torque ( Pipeline pressure, maximum differential pressure across the valve) , thrust.

the highest temperature and fluid.

use way and use.

opening and closing speed and time.

stem diameter, pitch, direction of rotation.

connection mode.

power supply parameters: the number of electric power supply voltage, phase, frequency; Pneumatic air pressure; Hydraulic source of hydraulic pressure.

special consideration: low temperature, anti-corrosion, explosion-proof, waterproof, fire prevention, radiation protection, etc.

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