phone: 760.929.0749 
Valve Actuator Design Guide

A complete Valve Actuator assembly consists of an electronic valve actuator, a valve kit, plus the valve itself.  Fill out and submit the form below describing your requirements, and our design staff will make specific recommendations.

Valve Actuator Requirements Specification (Requires User Registration)
Specify Electrical Input Parameters:
     Proportional Inputs (proportional control)
A 4 to 20 mA
B 0 to 10 VDC
     Switched Inputs (on/off or pulsed control)
C +, +, +, - For multi-position ball valves
D +, +, - For all other valves (typical for 1/4 turn ball valves)
Specify Valve Parameters:
- Your specific flow parameters determine the correct valve to use.
- The valve determines which VA series to use.
- The flow parameters also provide the information needed to determine the actuator's operating parameters and, consequently, its programming.

1.  If you are currently using a valve, or you know the valve that you want to automate, please indicate the manufacturer's name and the complete part number of the valve:

2.   If one of the flow curves shown in the VK8 Selection Guide or the VK21 Selection Guide meets your parameters, please indicate which one:

3.   Please specify the following flow parameters:
  A.  Type of fluid or gas
  B.  Specific gravity
  C.  Max. inlet pressure
  D.  Min. inlet pressure
  E.  Outlet pressure
(if to atmosphere, please indicate)
  F.  Max. temp. of fluid or gas
  G.  Min. Cv rating of valve (if known)
  H.  Maximum Flow Rate
  GPM (liquid)       SCFM (gas)       Lbs. per Hour (steam)
  I.  Type of valve required:
  Needle       Ball       Regulator       Not Determined

4.   Please rate your intended application in terms of duty cycle
(actuator 'on' time) :
    Minimal (less than 1 hour per day)
    Moderate (several hours per day)
    Severe (practically continuous)

5. Will your application have the valve seating (fully closed): 

6.  In terms of how fast the actuator turns the Valve (RPM):
  The default speed is 10 rpm. For most applications where the actuator is modulating to maintain a flow or pressure, this speed works well.
  A.  Small needle valves can have as many as 20 turns, some as few as three. If the application will require the valve to fully close and fully open, and the time between these positions is important, please specify (in seconds) the required length of time for the valve to transit from full open to closed:
  B.  If you want to specify the R.P.M., please select from the following:
  1.5        3        5        10        20        40   R.P.M.
Comments & Special Requirements:
Quantity Required Date Required

Return to: Valve Actuator

Call ETI Systems at (760)929-0749 to order by phone
or for assistance with your custom application