HVAC High Pressure Switch with Screw Terminals - Adjustable 0.5-30 Bar Range, 20A 250V AC Rating
High Pressure Switch for HVAC systems featuring screw terminal electrical connections. This passive device monitors pressure levels and automatically opens or closes electrical circuits based on calibrated spring tension thresholds.
Pressure switches function passively by responding to pressure presence or absence. When pressure on the diaphragm compresses the calibrated spring to reach or exceed the set point, contacts change state - from open to closed in NO switches or closed to open in NC switches.
- Compatible with fluorinated refrigerants, air, and liquids (liquid temperature range: -20 to 120°C)
- Adjustable range and differential settings for flexible configuration
- Renovated SPDT micro-switch ensures reliable switching function
- Flexible mounting bracket suits various application requirements
- Optional upper lid for IP44 protection rating
- Multiple connection types available on request
- Automatic and manual reset versions available
- Copper bellows and brass pressure interface materials
- Special models for marine (drip-proof) and hazardous (explosion-proof) applications
- CE approved for European market compliance
| Model | Range (bar) | Differential (bar) | Factory Setting (bar) | Max Bellows Pressure (bar) |
|---|---|---|---|---|
| Q3 | -0.5 to 3 | 0.35 to 1.5 | OFF: 2, ON: 1 | 16.5 |
| Q6 | -0.5 to 6 | 0.6 to 4 | OFF: 3, ON: 2 | 16.5 |
| Q6M | -0.5 to 6 | ≤1 | Manual reset | 16.5 |
| Q10 | 1 to 10 | 1 to 3 | OFF: 6, ON: 5 | 16.5 |
| Q16 | 5 to 16 | 1 to 4 | OFF: 10, ON: 8 | 33 |
| Q20 | 5 to 20 | 2 to 5 | OFF: 16, ON: 3 | 33 |
| Q30D | 5 to 30 | 3 to 10 | OFF: 20, ON: 15 | 33 |
| Q30 | 6 to 30 | 3-5 (fixed) | OFF: 20, ON: 15-17 | 33 |
| Q30M | 6 to 30 | ≤4 | Manual reset | 33 |
Note: Calibration units available in bar & psig, or can be revised to MPa & kgf/cm² upon request. Connection options include British Flare (E), solder (C), and capillary (S).
| Current Type | 125V AC | 250V AC | 24V DC |
|---|---|---|---|
| Non-Inductive Current | 20A | 10A | 10A |
| Inductive Current - Full Load | 15A | 8A | 8A |
| Inductive Current - Locked Rotor | 72A | 64A | - |
Standard products within 10 pieces typically ship within 4 days, depending on specification and order quantity.
We are an experienced manufacturer with our own factory facilities.
Yes, we provide OEM services for custom branding.
Yes, we offer intrinsic-safety and flame proof certified models.
Standard warranty period is 12 months.
We ship via express carriers (TNT, FedEx, DHL, UPS) or logistics services as indicated.
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