Pressure or differential - pressure limit controls for Industrial gas systems. SPST mercury switch. Opens circuit on pressure fall. Auto recycle. 1/2 to 5-1/2 inches water.
| Product #: | C437H-1043 | |
| 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. Auto recycle. 1/2 to 5-1/2 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. | |
| Pricing Information: | ||
| Unit Price: | $112.44 | |
| Package Type: | Each | |
| Units Per Package: | 1 | |
| Product Details: | ||
| -: | Pressure or differential - pressure limit controls for Industrial gas systems. | |
| Pressure Range: | 1/2 to 5-1/2 in. water | |
| Differential: | 0.25 in. | |
| Pressure Surge, Maximum: | 3.0 psi, 20.7 kPa | |
| Switch Mercury: | Spst | |
| Switch Action (Break): | Fall | |
| Reset, Manual (Lockout On Switch Break): | No | |
| Minimum Order Quantity: | 1 | |
| Trade Name: | Honeywell | |
| Trade Name Type: | Registered Trademark |
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