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HWC437K-1007 Honeywell (C437K1007) Gas Pressure Limit Switch 1 to 26 in. wc



SKU: HWC437K-1007
RETAIL: 152.85
BASE PRICE: 138.95

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Description
Product #: C437K-1007
Product Name: Honeywell Gas Pressure Limit Switch
Description: Pressure or differential - pressure limit controls for industrial gas systems. Opens control CKT on pressure fall. Manual reset. DPST mercury switch. 2 Separate circuits: 1 normally open, 1 normally closed. 1-26 Inches water.

FEATURES:
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.

APPROVALS:
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.

TEMPERATURE RATINGS:
32 F to 125 F (0 C to 52 C).

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

REPLACEMENT PARTS:
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.

ACCESSORIES:
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.
Dual spst switch (one normally open and one normally closed) with 4 leads serves function of spdt switch.
Two separate circuits. One circuit breaks and the other makes on a pressure rise or fall.
Lockout on fall.
Pricing Information:
Unit Price: $138.95
Package Type: Each
Units Per Package: 1
Product Details:
-: Pressure or differential - pressure limit controls for industrial gas systems.
Pressure Range: 1 to 26 in. water
Differential: 1-1/4 in.
Pressure Surge, Maximum: 5.0 psi, 34.5 kPa
Switch, Mercury: 2 Spst
Switch Action (Breaks): Fall and Rise
Reset, Manual (Lockout On Switch Break): Yes
Minimum Order Quantity: 1
Trade Name: Honeywell
Trade Name Type: Registered Trademark
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