Adjustable Pressure Switch, Differential Pressure Controller for
Water
Description
QYD differential pressure control is normally used in gas or liquid
system to control the pressure difference between the gas/liquid
pipeline and the circuit. A typical application is to install the
controller in the bypass pipeline near the system pump. When the
system pressure difference increases and exceeds pre-set pressure,
the control valve will open and more liquid/gas goes through the
side valve, which will reduce the pressure differential between
these two pipes of the water system. On the opposite, the pressure
differential will increase between these two pipes of the water
system.
QYD series differential pressure controls is designed to prove flow
through pumps
Renovated SPDT micro-switch ensure the reliable switch function
Used in fluoridated refrigerant,but also in air and liquid(-20 to
120°C)
Flexible mounting bracket suits various kinds of application
Various connections are available on request
IP33 rating
CE approval
Model Specification
| Model | Differential(Bar) | Factory Setting | Max Working
pressure |
| Min | Max |
| QYD2C | 0.5 | 2 | 0.5 | 12 |
| QYD4C | 0.5 | 3.5 | 1 | 12 |
| QYD4CH | 0.5 | 3.5 | 1 | 30 |
| QYD6CH | 1 | 6 | 6 | 30 |
| QYD4C/B | 0.3 | 4 | 0.3 | 17 |
Dimensions(mm)
Electric Rating
Rated Amps(A) Rated Voltage(V) | 125V
A.C | 250V
A.C |
| Non-Inductive Current | 20A | 10A |
Inductive
Current | Full Load | 15A | 8A |
| Locked Roter | 72A |
Contact Function
| 1 | Common Terminal |
| 2 | Close on Pressure Increase |
| 3 | Close on Pressure Decrease |
l Operating direction on press Increase at High Press. Side
Connection & Installation
Mounting Plate
Operating Instruction
1. The new outer cover,two fingers pinch both sides of the plastic
lid,open the outer cover can be pumped out;
2. To be installed in the pipe,must use two wrenches and twist
tight;
3. Do not install the controller over electric rating of the
device.
