• Use C437 for SPST (non-mercury) switching.
• Models intended for lockout applications must be manually reset before resuming operation.
• Models with pressure range of 1 to 26 in. wc (0.25 to 6.5 kPa)compensate for momentary surges in gas pressure with a restrictive orifice in inlet pressure channel.
• Impede tampering and provide dust-resistant operation with enclosed setting.
• Increase strength of control diaphragm with Buna N fiber-reinforced material.
• Two Buna-N fiber-reinforced seal-off diaphragms for added reliability.
• Clear glass cover allows observation of interior mechanism to aid in setting and checkout.Gas/Air Press Sw 1-26in Mercury Free| Sensor Element | BUNA N Diaphragm |
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| Overview | The C437D,E Series 2000 Gas Pressure Switches are pressure-actuated switching devices used in industrial gas system applications for safety shutoff, pressure control, and differential-pressure control. All Series 2000 models have MicroSwitch™ snap switche |
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| Materials (Case) | Die-cast aluminum |
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| Pipe Connections, Main or High Pressure | 1/2 in. NPT internal thread |
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| Maximum Sustained Operating Pressure (psi) | 5.0 psi |
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| Maximum Sustained Operating Pressure (kPa) | 34.5 kPa |
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| Application | Industrial gas system applications for safety shutoff, pressure control, or differential-pressure control. |
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| Pressure Differential (psi) | 1 3/4 in. wc |
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| Pressure Differential (kPa) | 0.44 kPa |
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| Operating Range (psi) | 1 to 26 in. wc |
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| Maximum Ambient Temperature (F) | 125 F |
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| Operating Range (kPa) | 0.5 to 7.0 kPa |
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| Maximum Ambient Temperature (C) | 52 C |
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| Switch Operation | Manual Reset |
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| Switching Action | SPST, Break on Fall, non mercury |
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| Pipe Connections, Vent or Low pressure | 1/8 in. NPT internal thread |
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| Dimensions (in.) | 7 3/4 in. high x 6 1/4 in. wide x 3 7/16 in. deep |
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| Dimensions (mm) | 197 mm high x 159 mm wide x 87 mm deep |
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| Switch Contact Ratings (120 Vac) | 8.0 AFL, 48.0 ALR, 10.0 A resistive |
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| Switch Contact Ratings (240 Vac) | 5.1 AFL, 30.6 ALR, 5.0 A resistive |
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| Differential Type | Additive |
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| Temperature Range (F) | 32 F to 125 F |
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| Temperature Range (C) | 0 C to 52 C |
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| Electrical Connections | Screw terminals |
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| Approvals, Underwriters Laboratories Inc | Listed: File No. MP2168, Guide No. MFHX |
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| Approvals, Canadian Standards Association | Certified: File No. LR1620, Guide No. 380-W-1.16 |
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| Approvals, Factory Mutual | Approved: Report No. 22018, 24127, J.I.IF4A3.AF |
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| Approvals, Swiss RE (formerly IRI) | Acceptable |
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Product Family
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