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Pressure Switch C911-P500

  • Pressure switch for natural gas, gaseous LPG, and air
  • Suitable for rising, falling, or differential pressure
  • A lamp indicates the state of the switch
  • 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: 40 - 200 WC
  • FM Approved, CSA Approved, NFPA86 compliant

Learn More:
Documentation   Accessories   Applications   Conversion Guide   Specifications

Pressure Switch for Gas and Air C911-P

Price:

Accessories

Model and Description Stock Price Cart
C911-PL24
24V AC/DC LED
C911-PL230
230V AC LED
C911-PADP
Straight thread adapter M18x1.5 to ½ inch NPT for conduit
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.

Application for Pressure Switch C911-P

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).

Application for Pressure Switch C911-P

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
Siemens QPL31.280A00 70 - 280 28 - 112 Auto Low 6 PSI 1 0 3 × 3 × 2.67 Yes
Siemens QPH31.280A00 70 - 280 28 - 112 Auto High 6 PSI 1 0 3 × 3 × 2.67 Yes
C911 C911-P500 100- 500 40 - 200 Auto High/Low 14.5 PSI 2 2 2.9 × 2.85 × 2.4 C911-PL24
Honeywell C6097A3137 100- 500 40 - 200 Auto Low 7 PSI 1 1 3 × 3 × 2 Yes
Honeywell C6097B3101 100- 500 40 - 200 Auto High 7 PSI 1 1 3 × 3 × 2 Yes
Karl Dungs GAO-A4-4-8 100- 500 40 - 200 Auto High/Low 7 PSI 1 1 3 × 2.8 × 2.3 GAO-A4-4-8GOLD
Kromschröder DG500T-22N 100- 500 40 - 200 Auto High/Low 7 PSI 2 1 3 × 3 × 2 DG500TG-22K2
Kromschröder DG500T-21N 100- 500 40 - 200 Auto High/Low 7 PSI 1 1 3 × 3 × 2 DG500TG-21K2

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): 1 bar
   
Stand pressure setting range
Factory set point (mbar): 100 - 500
Factory set point (“wc): 40 - 200
Switching diff. (∆P) (mbar): ≤ 13
Switching diff. (∆P) (“wc): ≤ 5.22
Adjustable tolerance: ± 15%
Differential: ± 15%
 
 

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