 |  | Proportional
control UMD series, applied in spherical valves, butterfly valves and three-way
valves, is used to control by proportion for opening, power and signal input,
and to regulate the opening of the valve automatically to control the flow of
air or liquid, temperature and liquid level according to the signal input of PID. |
Standard
and features:
| 1. | This
product, applicable to the series' use as a whole, if installed in model No. UMD-3~UMD-12,
can adopt built-in, and if installed in UMD-1 and UMD-2, can adopt a waterproof
box device or can be put directly in the control box to ensure the product's durability. | | 2. |
Rated voltage: AC110V/220V (50/60Hz). | | 3. | This
product, mainly made of aluminum alloy material and formed by casting, is provided
with waterproof seals on all the joints on the body's frame, so it is applicable
to uses in outdoors environment. | | 4. | This
series can be checked with the position of its valve switch from the top window. | | 5. | The
UMD-3-1~UMD-12 product is attached with a manual wheel device on its side, which
can be used to conduct the ON/OFF movements at power blackout. |
|
Points
for Attention：
| 1. | Make
sure the voltage, temperature, pressure, type of fluid and features used at the
site. | | 2. |
Make sure the signal output at the site is carried out with 4~40mA, 1~5VDC and
2~10VDC. | | 3. |
To prevent the signals from interfering with each other, use insulation wire for
signal transmission, which should be separated from power wire; both should not
entangle together. |
| | Points
for Attention:
| 1. | Signal
input: Use the Dip Switch for option; three means are available, 4~40mA, 1~5VDC
and 2~10VDC. | | 2. |
Both the signal input, which indicates the required position of the valve's opening,
and the feedback potentiometer (VR), which represents the actual position of the
valve's opening, are constantly compared by the circuit board over their signals. | | 3. |
If a difference is detected, then the electric head will turn the valve to an
appropriate position and does not stop until both signals are equal. This process
will be conducted again when the signals change. | | 4. | Temperature
range in operation environment: -10℃~60℃. |
| |
| Movement
flowchart： | | | | Proportional
power controlled regulator： | |
|
●UMD
proportional control, custom-made power-controlled regulator (optional).
|
