C437E2002 Honeywell Pressure Switch

The Honeywell C437E2002 Pressure Switch, Manual Reset, 1 in. to 26 in. water column. Pressure-actuated device 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.

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

• Application
  • Industrial 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. deep
• Dimensions (mm)
  • 197 mm high x 159 mm wide x 87 mm deep
• Materials
  • Case: Die-cast aluminum
• Approvals, Underwriters Laboratories Inc.
  • Listed: File No. MP2168, Guide No. MFHX
• Approvals, Canadian Standards Association
  • Certified: File No. LR1620, Guide No. 380-W-1.16
• Electrical Connections
  • Screw terminals
• Temperature Ratings (C)
  • 52 C – Maximum Ambient
• Temperature Ratings (F)
  • 125 F – Maximum Ambient
• Contact Ratings
  • 120 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 resistive
• Operating Temperature Range (F)
  • 32 F to 125 F
• Operating Temperature Range (C)
  • 0 C to 52 C
• Approvals, Swiss RE
  • Acceptable
• Approvals, Factory Mutual
  • Approved: Report No. 22018, 24127, J.I.IF4A3.AF
• Sensor Element
  • BUNA N Diaphragm
• Operating Range (psi)
  • 1 to 26 in. wc; 5.0 psi – Maximum Sustained
• Operating Range (kPa)
  • 5 to 7.0 kPa; 34.5 kPa – Maximum Sustained
• Differential Pressure Range (psi)
  • 1 3/4 in. wc
• Differential Pressure Range (kPa)
  • 44 kPa
• Differential Type
  • Additive
• Switch Operation
  • Manual Reset
• Switching Action
  • SPST, Break on Fall, non mercury
• Pipe Connection
  • Main or High Pressure–1/2 in. NPT internal thread; Vent or Low pressure–1/8 in. NPT internal thread

Honeywell.com