无锡市圣汉斯气动阀门制造有限公司

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选型与订购 Sizing information and How to Order

一、阿尔法系列执行器的型号与规格
阿尔法系列执行器的型号与规格表示方法共有四部分组成。
There are four parts in the Model and specification of ALPHA Series Actuators .
如下图所示：
Seeing follows please:

例：
αA-85DA，缸径85mm，双作用式阿尔法A系列执行器
αB-240SR，缸径240mm，单作用式阿尔法B系列执行器

Example:
αA-85DA: ALPHA A Series Actuator With Double Acting.The Diameter of Body equal to 85mm.
αB-240SR: ALPHA B Series Actuator With Spring Return.The Diameter of Body equal to 240mm.

二、双作用执行器的选型
在正常操作条件下，双作用执行器考虑的安全系数为20%-30%。

示例：
阀门力矩=100Nm
安全力矩=100×(1+30%)=130Nm
气源压力=5Bar

对照双作用力矩表，选配双作用执行器最小规格为αB-105DA。

Sizing: Spring Return Actuators
The suggested safety factor for double acting actuators under normal working conditions is 20%-30%.

Example:
The torque needed by valve=100N.m
The torque considered safety factor (1+30%)=130N.m Air Supply=5Bar

According to the above table, we can choose the minimum model is αB-105DA.

三、单作用执行器的选型
在正常工作条件下，单作用执行器考虑的安全系数为30%-50%

例如：
阀门需要力矩=80N.m
安全力矩=80(1+30%)=104N.m气源压力=5Bar
对照单作用执行器输出力矩表，我们可以查到SR140 K7输出力矩为
空气行程 0°=308N.m
空气行程 90°=247N.m
弹簧行程 90°=181N.m
弹簧行程 0°=120N.m
所有输出力矩均大于我们需求。
注意：
单作用执行器弹簧复位过程中，执行器B口通气不影响执行器输出力矩，相反帮助弹簧的复位。

Sizing: Spring Return Actuators
The suggested safety factor for spring return actuator under normal working conditions is 30-50%
Example：
The torque needed by valve=80N.m
The torque consider safety factor ( 1+30%)=104 N.mAir Supply=5Bar
According to the table of spring return actuators' output, we find output torque of SR140 K7 is:
Air stroke 0°=308N.m
Air stroke 90°=247N.m
Spring stroke 90°=181N.m
Spring stroke 0°=120N.m
All the output torque is larger than we needed.
Attention:
During the restoration, the spring return actuators' output torque will not be affected by the inputing air from the port B. On the contrary, it will help the restoration of springs.

四、单作用执行器的经济选型
在单作用执行器的选配过程中，如果能够了解阀门在开启、运行和关闭时的扭矩分配，我们就可以更加经济、更加合理地选配执行器。
例如：
蝶阀原最大扭矩=104N.m
打开后扭矩 104x30%=32N.m
气源压力=5Bar
我们可以选择 SR125 K11
空气行程 0°=136N.m >104N.m
空气行程 90°=78N.m >32N.m
弹簧行程 90°=173N.m >32N.m
弹簧行程 0°=115N.m >104N.m
以上数据显示可以满足该蝶阀的正常启闭。

Economical Sizing: Spring Return Actuators
During selecting the spring return actuators, we can choose the more reasonable and more economical actuators, if we konw the different torque needed by the valve working at opening, operating and closing.
Example:
The max torque needed by the butterfly valve=104N.m
The torque after opened (operating)104x30%=32N.m
Air Supply=5Bar
We can select the SR125 K11
output torque is:
Air stroke 0°=136N.m >104N.m
Air stroke 90°=78N.m >32N.m
Spring stroke 90°=173N.m >32N.m
Spring stroke 0°=115N.m >104N.m
The above datas show the actuator's torque can satisfy the requirement of the butterfly valve.