Pressure Switch C911-P50
- Pressure switch for natural gas, gaseous LPG, and air
- Suitable for rising, falling, or differential pressure
- A lamp indicates the state of the switch
- All models have NPT connection
- One normally open and one normally closed contact in each switch
- Compact construction, easy installation
- ¼" NPT gas or air connection
- M18x1.5 electrical connection
- Pressure Range: 2 - 20 WC
- FM Approved, CSA Approved, NFPA86 compliant
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Documentation Accessories Applications Conversion Guide Specifications
Price:
Accessories
| Model and Description | Stock | Price | Cart |
| C911-PL24 24V AC/DC LED |
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| C911-PL230 230V AC LED |
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| C911-PADP Straight thread adapter M18x1.5 to ½ inch NPT for conduit |
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| C911-PCG M18x1.5 cable gland for SO cord |
Applications (click on image for close-up view)
NFPA86 code requires pressure switches to monitor combustion air pressure, purge air flow, high gas pressure, and low gas pressure. These devices are part of the safety chain, and they must be satisfied for safe operation of an industrial combustion system.
C911-P, purge air pressure switch
C911-P is suitable for use on main air manifolds, for proving combustion air pressure (Combustion Air Pressure Switch) and for proving purge air flow (Purge Air Pressure Switch).
C911-P, main gas manifold
C911-P is suitable for use on main gas manifolds, for monitoring high and low gas pressure. In systems where tightness check is performed on the main gas safety shut-off valves, C911-P may be used as the tightness check pressure switch. Please note! The low gas pressure switch must be rated for the maximum inlet pressure, in case of a pressure reducing regulator failure.
Conversion Guide
| Switching Range | ||||||||||
| Manufacturer | Model Number | mbar | "wc | Reset | High/Low | P. Max. | 1/4 ports | 1/8 ports | Dimensions (in.) | 24V Version |
| Antunes | 8104116203 | 2.5 - 50 | 1 - 20 | Auto | Low | 6 PSI | 1 | 0 | 3 × 3 × 2.68 | Yes |
| Antunes | 8102111203 | 5 - 50 | 2 - 20 | Auto | High | 6 PSI | 1 | 0 | 3 × 3 × 2.68 | Yes |
| C911 | C911-P50 | 2.5- 50 | 2 - 20 | Auto | High/Low | 7 PSI | 2 | 2 | 2.9 × 2.85 × 2.4 | C911-PL24 |
| Siemens | QPB32.020A00 | 5- 50 | 2 - 20 | Auto | High/Low | 7 PSI | 1 | 1 | 2.9 × 2.85 × 2.4 | Yes |
| Honeywell | C6097A3053 | 2.5- 50 | 1 - 20 | Auto | Low | 7 PSI | 1 | 1 | 3 × 3 × 2 | Yes |
| Honeywell | C6097B3119 | 2.5- 50 | 1 - 20 | Auto | High | 7 PSI | 1 | 1 | 3 × 3 × 2 | Yes |
| Karl Dungs | GAO-A4-4-5 | 5 - 50 | 2 - 20 | Auto | High/Low | 7 PSI | 1 | 1 | 3 × 2.8 × 2.3 | GAO-A4-4-5GOLD |
| Kromschröder | DG50T-22N | 2.5 - 50 | 1 - 20 | Auto | High/Low | 7 PSI | 2 | 1 | 3 × 3 × 2 | DG50TG-22K2 |
| Kromschröder | DG50T-21N | 2.5 - 50 | 1 - 20 | Auto | High/Low | 7 PSI | 1 | 1 | 3 × 3 × 2 | DG50TG-21K2 |
| Siemens | QPL31.050A00 | 2.5 - 50 | 1 - 20 | Auto | Low | 6 PSI | 1 | 0 | 3 × 3 × 2.67 | Yes |
| Siemens | QPH31.050A00 | 2.5 - 50 | 1 - 20 | Auto | High | 6 PSI | 1 | 0 | 3 × 3 × 2.67 | Yes |
Specifications
| General | |
| Pressure connection: | Positive: NPT ¼″, Negative: NPT 1/8″ (See Dimensions) |
| Measuring connection: | Test nipple integrated in aluminum housing, ø9, 10 mm length with screw plug |
| Electrical connection: | M18x1.5 |
| Type: | Adjustable set point |
| Ambient temperature: | +5°F to +140°F (-15 ~ 60 °C) |
| Storage temperature: | -20°F to +175°F (-30 ~ 80 °C) |
| Enclosure: | IP65 |
| Leak - Tightness: | Non-leakage (Pmax. x1.5 for 1 minute) or Standard EN1854 (7.2.2) |
| Electrical Rating | |
| Switching voltage: | AC eff. min. 24V max. 250V DC min. 24V max. 48V |
| Nominal current: | AC eff. max. 6A |
| Switching current: | AC eff. max. 4 A at cos 1 AC eff. max. 2 A at cos 0.6 AC eff. min. 20 mA DC min. 20 mA, DC max. 100 mA DC |
| Materials | |
| Body: | Aluminum die casting |
| Diaphragm: | H-NBR |
| Switching contact: | Au plated on AgSno2 |
| Switch part: | Polycarbonate |
| Control fluid | |
| Positive: | Natural gas, Propane gas, Air |
| Negative: | Air |
| Endurance | |
| Cycle: | 50,000 Cycles (ON: 5s / OFF: 5s) |
| Test pressure: | Pmax. x1.2 |
| Standard: | EN1854 (7.4.3) |
| Pressure | |
| Max. permissible pressure (inrush pressure): | 500 mbar |
| Stand pressure setting range | |
| Factory set point (mbar): | 5 - 50 |
| Factory set point (“wc): | 2 - 20 |
| Switching diff. (∆P) (mbar): | ≤ 1.5 |
| Switching diff. (∆P) (“wc): | ≤ 0.60 |
| Adjustable tolerance: | ± 15% |
| Differential: | ± 15% |
