Honeywell C437E2002 – Gas Pressure Switch 1-26 psi
Description
Overview
C437D,E Series 2000 Gas Pressure Switches are pressure-actuated devices used in industrial gas systems for safety shutoff. Series 2000 models have snap acting MicroSwitch™ snap switches to open a circuit on pressure rise or drop.
Features
C437 models have direct- and reverse-acting 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.
Product Specifications
ApplicationIndustrial gas system applications for safety shutoff, pressure control, or differential-pressure control.Dimensions (in.)7 3/4 in. high x 6 1/4 in. wide x 3 7/16 in. deepDimensions (mm)197 mm high x 159 mm wide x 87 mm deepMaterialsCase: Die-cast aluminumApprovals, Underwriters Laboratories Inc.Listed: File No. MP2168, Guide No. MFHXApprovals, CSACertified: File No. LR1620, Guide No. 380-W-1.16Electrical ConnectionsScrew terminalsTemperature Ratings (C)52 C – Maximum AmbientTemperature Ratings (F)125 F – Maximum AmbientContact Ratings120 Vac Switch Contact– 8.0 AFL, 48.0 ALR, 10.0 A resistive; 240 Vac Switch Contact– 5.1 AFL, 30.6 ALR, 5.0 A resistiveOperating Temperature Range (F)32 F to 125 FOperating Temperature Range (C)0 C to 52 CApprovals, Swiss REAcceptableApprovals, Factory MutualApproved: Report No. 22018, 24127, J.I.IF4A3.AFSensor ElementBUNA N DiaphragmOperating Range (psi)1 to 26 in. wc; 5.0 psi – Maximum SustainedOperating Range (kPa)0.5 to 7.0 kPa; 34.5 kPa – Maximum SustainedDifferential Pressure Range (psi)1 3/4 in. wcDifferential Pressure Range (kPa)0.44 kPaDifferential TypeAdditiveSwitch OperationManual ResetSwitching ActionSPST, Break on Fall, non mercuryPipe ConnectionMain or High Pressure–1/2 in. NPT internal thread; Vent or Low pressure–1/8 in. NPT internal thread
