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HWC437E-1012 Honeywell (C437E1012) Gas Pressure Limit Switch 1/2 to 5 PSI.

SKU: HWC437E-1012
RETAIL: 206.80
BASE PRICE: 188.00

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Product #: C437E1012
Product Name: Honeywell Gas Pressure Limit Switch
Description: Pressure or differential - pressure limit controls for industrial gas systems. SPST mercury switch. Opens circuit on pressure fall. Manual reset. 1/2 to 5 PSI.

Use C437 for spst switching or C637 for spdt switching. Compensate for momentary surges in gas pressure with a restrictive orifice in inlet pressure channel on the models with pressure range of 1 to 26 in. wc (0.25 to 6.5 kPa). Resume operation by manually resetting when using lockout application models. Impede tampering and provide dust-resistant operation with enclosed setting. Increase strength of control diaphragm with Buna-N fiber-reinforced material. Clear glass cover allows observation of interior mechanism to aid in setting and checkout. Mercury switch provides visual indication of switch position.

Underwriters Laboratories Inc. Listed: File No. MP2168, Guide No. MFHX.
Canadian Standards Association Certified: File No. LR1620, Guide No. 380-W-1.16.
Factory Mutual Approved: Report Nos.22018,24127, J.I.IF4A3.AF.
Industrial Risk Insurers Acceptable.

32 F to 125 F (0 C to 52 C).

1/2 in. NPT female for main or high pressure.
1/8 in. NPT female for vent or low pressure.

106729 Cover Glass, 6 in. (152.5 mm) diameter.
106747 Cover Retaining Ring for C437 and C637 models manufactured before 1973.
118733-00021 Retaining Clip for C437 and C637 models manufactured since 1975.
139870A Cover Glass for rainproof enclosures.

122160 Orifice - 0.018 in. (0.46 mm) diameter.
124674 Orifice - 0.011 in. (0.28 mm) diameter.
4074BWK Mounting Brackets, for surface mounting.

Differential at midscale. Subtractive for C437D, J, G. Additive for C437E, F, H, K and C637B.
Package Type: Each
Units Per Package: 1
Product Details:
-Applications: Safety Shutoff, Pressure and differential - pressure limit controls for industrial gas systems.
Pressure Range: 1/2 to 5 psi
Differential: 1/4 psi, (1.72 kPa)
Pressure Surge, Maximum: 15.0 psi, 103.4 kPa
Sustained Operating  Maximum: 15.0 psi, 103.4 kPa
Switch Mercury: Spst, Breaks on Fall
Switch Action (Breaks): Fall
Reset, Manual (Lockout On Switch Break): Yes, Manual Reset
Switch Contact Rating (120 Vac)   8.0 AFL, 48.0 ALR, 10.0 resistive
Switch Contact Rating (120 Vdc)   2.4 AFL, 24.0 ALR, 5.0 resistive
Switch Contact Rating (240 Vac)   5.1 AFL, 30.6 ALR, 5.0 resistive
Switch Contact Rating (240 Vdc)   1.2 AFL, 12.0 ALR, 2.0 resistive
Minimum Order Quantity: 1
Trade Name: Honeywell
Trade Name Type: Registered Trademark
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