Both manual and pneumatic butterfly valves can be used for food processing,pharmacy and chemical industries.
Working priciple:
Can be operated by handle,as well as pneumatic actuator。
Handle can control the valve's on/off position,And can also adjust other positions.Actuator rotates the shaft to 90 degree,force onto the butterfly valve.
Specifications:

size: DN10 to DN300,1/2"to 12"
connections:butt welded,clamped,male,flanged,etc..
Norms:DIN SMS RJT 3A ISO IDF
Handles type：muti-position handle,pulling handle,plastic handle,stainless steel handle
Pneumatic actuator：Air-spring; normally closed(NC),normally open(NO).Air-Air
Electric actuator：intellegent control,on/off
control methods：intellegent control top,input/output4-20mA ,Dviece NET AS-I
Gasket：EPDM Silicong FPM NBR FDA.177.2600
Material：ASTM T304/316L，1.4301/1.4404
Max pressure：10bar
Max temp：150℃
certification:PED/97/23/EC
Electric actuator,on/off and intellegent control top
size：HL-5/HL-10/HL-20/HL-50/HL100/HL-200
Torque：15N.M-2000N.M，Action time:10S-100S
input：4-20mA.DC/1-5V.DC
output：4-20mA.DC/0-10V.DC
enviroment temp：-25℃ to 60℃
Housing material：alloy
IP-67