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.

fpmlh

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

fpmlh-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 (formerly GOST)

*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)
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