Honeywell Switch C437F Manuel d'utilisateur télécharger pdf

PRODUCT DATA

C437D,E,F,G,H,J,K and C637B Gas

Pressure Switches

FEATURES

• C437 models have direct- and reverse-acting (spst)

switching; C637B has single-pole, double-throw (spdt)

switching.

• Pressure ranges: 1/2 to 5-1/2 in. of water (10 to 140 mm

of water, or 0.1 to 1.4 kPa); 1 to 26 in. of water (50 to

700 mm of water, or 0.5 to 7 kPa); 1/2 to 5 psi (300 to

3500 mm of water, or 3 to 35 kPa); 1 to 10 psi (500 to

7000 mm of water, or 5 to 70 kPa).

• Models intended for lockout applications must be

manually reset before resuming operation.

• Trip-free mechanism on manual reset models ensures

that the limit function of the switch cannot be defeated

by jamming the reset lever.

• External manual reset button on side of lockout

models.

• Enclosed setting impedes tampering and provides

dust-resistant operation.

• Buna-N fiber-reinforced material for increased

strength of control diaphragm.

• Two Buna-N fiber-reinforced seal-off diaphragms for

added reliability.

• Clear glass cover allows observation of interior

mechanism to aid setting and checkout.

• Mercury switch provides visual indication of switch

position.

• Heavy die-cast case increases durability and

resistance to corrosion.

• Main control diaphragm completely enclosed a leak-

proof chamber can be vented to a safe area.

• Models with a pressure range of 1 to 26 in. of water

(50 to 700 mm of water, or 0.5 to 7 kPa) have a

restrictive orifice in the inlet pressure channel to

compensate for momentary surges in gas pressure.

• Field-addable orifices of various sizes are available.

• Models available with rainproof, dustproof, sleet- and

ice-resistant enclosure; meets NEMA 3R specification.

Contents

General ............................................................................... 1

Features .............................................................................. 1

Specifications ...................................................................... 2

Ordering Information ........................................................... 2

Recycling Notice ................................................................. 4

Installation ........................................................................... 4

Setting and Checkout .......................................................... 6

GENERAL

The C437 and C637 Gas Pressure Switches are pressure-

actuated switching devices used in industrial gas system

applications for safety shutoff, pressure control, and

differential-pressure control.

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Résumé du contenu

Page 1 - Pressure Switches

Page 2 - ORDERING INFORMATION

C437D,E,F,G,H,J,K AND C637B GAS PRESSURE SWITCHES60-2320—92SPECIFICATIONSModels:ORDERING INFORMATIONWhen purchasing replacement and modernization prod

Page 3 - 60-2320—9

C437D,E,F,G,H,J,K AND C637B GAS PRESSURE SWITCHES60-2320—93Switch:Mercury switch (C437F,J and K have two spst switches in one mercury bulb).Differenti

Page 4 - RECYCLING NOTICE

C437D,E,F,G,H,J,K AND C637B GAS PRESSURE SWITCHES60-2320—94Fig. 1. Installation dimensions of the C437 and C637 gas pressure switches, in in. (mm).REC

Page 5 - Mounting

C437D,E,F,G,H,J,K AND C637B GAS PRESSURE SWITCHES60-2320—95CAUTIONDisconnect all power to the pressure switch beforebeginning installation to prevent

Page 6 - SETTING AND CHECKOUT

C437D,E,F,G,H,J,K AND C637B GAS PRESSURE SWITCHES60-2320—96(1) Connect the high-pressure side of thesystem to the 1/2 in. NPT main pressuretapping on

Page 7

C437D,E,F,G,H,J,K AND C637B GAS PRESSURE SWITCHES60-2320—97To reset one of these pressure switches, wait until thepressure falls to the setpoint minus

Page 8

C437D,E,F,G,H,J,K AND C637B GAS PRESSURE SWITCHES60-2320—9860-2320—9 L.Z. Rev. 9-95customer.honeywell.comAutomation and Control SolutionsHoneywe