when select an electric actuator to connect?
The answer is that the electric actuator might fail to operate the valve.
For example, if you select an electric actuator with 35 Nm torque and a ball valve requiring 30 Nm torque, you might think they can function together without issues. However, valves always require a safety factor to compensate for additional torque caused by factors such as fluid impurities, working pressure, or fluid temperature. Generally, when matching electric actuators to valves, a safety factor of 1.3 to 1.5 times the valve torque should be added. For valves with larger torque requirements, a higher safety factor is necessary.
How many types do we have of electric actuators?
PRO UNI-D CO., LTD created three types of quarter turn valves (to control ball valves, butterfly valves, dampers...)
and one type of linear valves (gate valves, globe valves...). Both of them are able to add functions, such as
bluetooth control, failsafe, power backup, heater, supply Mobus ASCII through RS-485.
What's the connecting way of Modbus ASCII with RS485 of electric actuator?
Our smart type of electric actuators support Modbus ASCII that use RS485 to connect 2pcs~30pcs electric actuators in the same time. The program can control all electric actuators or some of them in sync or out of sync.What's the difference between electric actuator and linear valve actuator?
1. Electric actuators use to connect to quarter valve, such as ball valve, butterfly valves.2. Linear valve actuators use to connect to linear valves, such as gate valve
and global valves.
What is Bluetooth control of electric actuator?
Our smart type of electric actuators with built-in bluetooth function.Users can remote control valve open or close, detect electric actuators.
operating status and find problems for maintenance.
What's the dry contact (extra limit switch) function?
This is a volt free feedback signal that to advice electric actuator the status of valve.(Valve is opened or closed.)
What does electric actuators use for?
Electric actuator is a control device that connect to valve and control valve open and close.How to select a correct electric actuator?
1. Both of electric actuator and valve are with torque.2. Make sure the valve size, valve torque, and connecting standard that you will use:
ex. 2" stainless steel ball valve, NPT thread end, 60Nm (Newton metre).
3. Add safety factor 1.5 times on valve torque
ex. valve torque is 60Nm (Newton meter) *1.5 = 90Nm,
the electric actuator torque must be higher than 90Nm.