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FP-MLH Flameproof Mini Line Heaters

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The range of flameproof mini line heaters consist of a screw plug or flanged type immersion heater mounted in a thermally insulated heating vessel, and is designed to efficiently transfer heat to a flowing medium (liquid, air or gas). The FP-MLH range is certified for use in hazardous areas where the atmosphere is classified as a Zone 1 or 2 (IIA, IIB, IIC) gas group.

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Features

Certified to ATEX standards
Weatherproof protected to IP66 or NEMA 4 (FP4-MLH only)
Choice of built in process temperature sensors and externally adjustable option
Mild steel or 316 stainless steel vessel
Suitable for ambient temperatures from -40°C to +40°C (FP-MLH) and -60°C to +60°C (FP4-MLH)
Standard range of high quality Incoloy or stainless steel rod-type elements, designed for water or withdrawable ceramic core elements, designed for oil
Maximum allowable working pressure up to 10 barg / 145 psig, subject to design parameters
Designed for both horizontal and vertical installation (if mounted vertically, terminal box must be located at the bottom)
FP4-MLH range available with multi approvals

Applications

Model

Model	FP-MLH1S	FP-MLH2S	FP-MLH3S	FP-MLH6S	FP-MLH9S	FP-MLH3L	FP-MLH6L	FP-MLH9L	FP-MLH12L	FP-MLHX1	FP-MLHX2	FP-MLHX3
Loading (kW)	1	2	3	6	9	3	6	9	12	1	2	3
Dim A (mm)	475	475	475	475	475	925	925	925	925	925	925	925
BSP/NPT	1''	1''	1''	1''	1''	1''	1''	1''	1''	1''	1''	1''

Specifications

Certification	ATEX II 2 G EN 60079-0, EN 60079-1, EN 60079-7, EN 60079-31 Ex d IIC T4 to T6 Gb Zone 1 and 2 CU TR (EAC) *FP4-MLH also certified to ATEX / IECEx, CSA, Inmetro, KGS, CNEx, CCOE
Enclosure	Cast aluminium alloy with a maximum of one M20 and one M25 cable entry, external and internal earths and screwed terminal cover (FP4-MLH - mild steel or 316 stainless steel)
Elements	High quality nickel chrome resistance wire compacted in magnesium oxide insulating powder and sheathed in corrosion resistant Incoloy 825/800, 316L stainless steel, withdrawable ceramic core elements housed in mild steel or 316L stainless steel tube
Pressure	Maximum allowable working pressure up to 10 barg / 145 psig subject to design parameters
Design Code	Sound Engineering Practice (SEP)
Vessel	Mild steel or stainless steel
Insulation	Mineral wool
Cladding	Coated mild steel or 304 stainless steel
Voltage	Standard units are normally designed for 220V to 254V (1 phase) or 380 to 440V (3 phase)