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Q Series Single Pressure Switch
| Certificate: | CE | Pressure Interface: | Brass |
|---|---|---|---|
| Micro-switch: | SPDT | Housing Protection: | IP44 |
| Highlight |
SPDT Brass Adjustable Pressure Switch,Brass Adjustable Pressure Switch,IP44 Adjustable Water Pressure Switch |
||
Adjustable pressure switch for water pump
Description
How do pressure switches work?
An electro-mechanical pressure switch works by applying pressure to either a diaphragm, bellow or a piston to exert motion. The motion can create electrical contact in a microswitch launching an alarm or creating an action, for example switching off a compressor. An electronic pressure switch generally uses a piezo-electric crystal; when deformed a piezo crystal emits an electric current.
How do I select a pressure switch?
Choosing the right switch will depend on the pressure requirements of the air compressing unit you’re using, as well as the following considerations:
- Operating pressure range
- Switching pressure difference
- Repeatability
- Medium – for example air, hydraulic or ‘allfluid’
- Environment for operation – for example ATEX requirement, temperature etc
- Switching current – for example, gold contacts allow lower currents
- Outputs required
Feature
- Q series single pressure controls can be not only used in fluorinated refrigerant, but also in the air and liquid(allowed liquid temp. -20 to 120°C)
- Adjustable range and differential settings
- Renovated SPDT micro-switch ensures the reliable switch function
- Flexible mounting bracket suits various kids of application
- Upper lid is optional (IP44)
- Various connections are available on request
- Automatic and manual reset version
- The material of bellows is copper and pressure interface is brass
- Several models available in drip-proof enclosure for marine applications or in explosion-proof enclosure for special applications
- CE approval
Technical Data
| Model | Range(bar) | Differential(bar) | Factory setting(bar) | Max bellows pressure | |||
| Min | Max | Min | Max | OFF | ON | ||
| Q3 | -0.5 | 3 | 0.35 | 1.5 | 2 | 1 | 16.5 |
| Q6 | -0.5 | 6 | 0.6 | 4 | 3 | 2 | 16.5 |
| Q6M | -0.5 | 6 | ≤1 | 3 | Manual reset | 16.5 | |
| Q10 | 1 | 10 | 1 | 3 | 6 | 5 | 16.5 |
| Q16 | 5 | 16 | 1 | 4 | 10 | 8 | 33 |
| Q20 | 5 | 20 | 2 | 5 | 16 | 3 | 33 |
| Q30D | 5 | 30 | 3 | 10 | 20 | 15 | 33 |
| Q30 | 6 | 30 | 3-5(fixed) | 20 | 15-17 | 33 | |
| Q30M | 6 | 30 | ≤4 | 20 | Manual reset | 33 | |
Note:
Calibration unit on scale plate with “bar” & “psig”, could be revised into “Mpa”& “kgf/cm2” if required by customers. Connections could have selections as British Flare (E), solder (C) and capillary (S).
Dimensions (mm)
Electric Rating
|
125V AC |
250V AC |
24V DC |
||
| Non-Inductive Current | 20A | 10A | 10A | ||
| Inductive Current | Full Load Current | 15A | 8A | 8A | |
| Locked Roter | 72A | 64A | |||
Electric wiring
