Chromalox PE417-3 specifications General, 161-025752-001, Date February, Chromalox

Chromalox®

Installation, Operation

and

RENEWAL PARTS IDENTIFICATION

SERVICE REFERENCE

DIVISION 4		SECTION GCH
SALES	(Supersedes PE417-2)		PE417-3
REFERENCE
			161-025752-001

DATE FEBRUARY, 1999

Type GCH/GCHIS Circulation Heater (for Steam, Gas and Air Heating)

3/4" NPT Pipe Plug

	Outlet
	2 Mtg.	Mounting
		Lugs
	Lugs Ea. - Min.
		OR
	Inlet
	K.O. for Conduit
Temperature	Terminal
	Housing
Control		Terminal

(when	Housing
specified)

Outlet

Temperature

Control

(when

specified)

Inlet

K.O. for Conduit

Specifications – Design is dependent upon size of heater and customer's specifications.

GENERAL

WARNING: Safe operating conditions depend on oper- ating pressure, mass velocity of gas and discharge temperature of the gas. At a given discharge gas tem- perature, heater element sheath temperature and pipe body temperature will increase as gas flow (mass velocity) decreases. The standard GCH has a 750˚F limitation on the carbon steel body and 1500˚F limit on the INCOLOY® sheath elements. Pressure limits vary as the temperature of the vessel increases. If the vessel temperatures exceed 250˚F or operating pres- sure is greater than 100psi, the vessel limits must be evaluated at the specific pressures and temperatures expected during operation. Contact Chromalox if any doubt exists as to temperatures that will be encoun- tered in your specific application. At pipe body tem- peratures above 750˚F, a stainless steel body is required (Model GCHIS).

WARNING: Do not exceed the Pressure-Temperature rating of the flange as listed in ANSI B16.5. Before installing, local codes must be reviewed to verify ASME Certification of the pressure vessel is not a requirement. If required, contact Chromalox.

WARNING: This heater is not intended for use in haz- ardous atmospheres where flammable vapors, gases, liquids or other combustible atmospheres are present as defined in the National Electrical Code. Failure to comply can result in explosion or fire.

The GCH/GCHIS series is a general purpose gas or steam circu- lation heater intended for indoor use. This heater can be used in an outdoor environment, if ordered with an E4 moisture-resistant termi- nal enclosure and a weatherproof insulation jacket. Also available is an E3 explosion-resistant terminal enclosure. Consult with Chromalox for operating restrictions in hazardous locations. Note: The GCHIS is intended for use in corrosive or high temperature applications.

The INCOLOY® sheathed tubular elements are centered in a steel/stainless steel heating chamber and welded to a removable steel/stainless steel flange. The number of elements will vary, depending upon the flange size used. Some units are fitted with baf- fles to increase the flow. They are designated as GCHB. The assem- bly is surrounded by insulation and a sheet metal jacket.

Depending upon the order specifications, the GCH/GCHIS may or may not be factory equipped with an AR or other Chromalox ther- mostat. Such thermostats function to control outlet temperatures and to limit internal temperatures under abnormal flow conditions. These controls are not fail-safe.

WARNING: Users should install adequate back-up con- trols and safety devices with their electric heating equipment. When heating in closed vessels where the consequences of failure may be severe, controls and back-up controls must be used to prevent buildup of temperature and/or pressure. Although the safety of the installation is the responsibility of the user, Chromalox will be glad to make equipment recom- mendations.

© 2010 Chromalox, Inc.