Product Overview

DESCRIPTION
Models:
M M411, M411H, M511, M511H, M611, M611H, M420,
M420H, M520, M520H, M620, M620H, M451, M551,
and M651.
MR MR212D, MR212E, MR212G, MR212J (Flanged),
MR251D, MR251E, MR251G, MR410, MR410-1,
MR410H, MR410H-1, MR510, MR510-1, MR510H,
MR510H-1, MR610, MR610-1, MR610H, and
MR610H-1.
• Absolutely NO EXTERNAL MECHANICAL ACTIVATION required.
• MR Valve (only) performs dual function of modulation and
pressure regulation.
• Providesinnite,continuousameadjustment.
• Maybefactoryinstalledoraddedintheeld.
• Capacities to 30,000 CFH.
• Available in a wide range of body styles and pipe sizes.
• Designed for use with the Maxitrol Selectra
®
series of modulation
systems - or SC11 Signal Conditioners convert computer/PLC
controller signals if standard Maxitrol companion controls are not
specied.
Whether your needs are problem-free stabilized area heating,
elevated heating, consistent higher baking/drying temperatures or
other process applications, maintaining consistent temperatures is
no longer a problem.
The unique Modulator or Modulator/Regulator valve, the heart of
the Selectra
®
Electronic Gas Flame Modulating System, provides
precise,non-uctuating,instantaneoustemperaturecontrolwithout
requiringamotorormechanicallydrivenbutteryvalve.
1
© 2016 Maxitrol Company, All Rights Reserved
Figure 1 : MR212
designcertied
M/MR Modulating Valves
For Atmospheric, Infrared, and Direct Fired Burners
TABLE OF CONTENTS
Description/Specications.....................................................1
Introduction .......................................................................... 2
Direct Fired Applications (Negative Pressure) ..................... 2
Direct Fired Applications (Positive Pressure) ...................... 2
Indirect Fired Applications ..................................................... 3
‘H’SufxM/MRValves.........................................................3
Applications Table ................................................................. 4
Dimensions .......................................................................... 5
Capacities ............................................................................ 6
Typical Gas Trains ............................................................... 7
Typical Installations ............................................................. 7
Model Designations ............................................................. 7
SPECIFICATIONS
Gases:
Natural,Manufactured,Mixed,LiqueedPetroleumandLiqueed
PetroleumGasAirMixtures.H,H-1modelsforusewithLiqueed
Petroleum and other applications.
Certications:
M611, MR212D, E, & G with Series 14: CSA listed to certify
compliance with nationally published safety, construction, and
performance standards.
M411, M420, M420H, M451, M511, M520, M520H, M611, M620,
M620H, MR212D, E, G, & J with AD1094 controls: CSA listed to
certify compliance with nationally published safety, construction,
and performance standards.
MR410, MR410H-1, MR510, MR510H-1, MR610, and MR610H-1:
CSAcertiedtoZ21.18andCSA6.3-M82.
M511, M611, MR212D, E, & G: UL recognized for compliance
to nationally published safety, construction, and performance
standards in the U.S. and Canada.
Vent:
Models M411, M511, M611, M420, M520, M620, M420H, M520H,
M620H, MR410(H)(-1), MR510(H)(-1), MR610(H)(-1), M551,
M651:Verticalventoutlet1/8”NPT-12A06installed.
Models MR212 and MR251: Two vents located in upper housing,
both equipped with vent limiting means.
Ambient Limits:
Operating ......................................... -40º to 125ºF (-40º to 50ºC)
Non-operating..................................-50ºto185ºF(-45ºto85ºC)
Mounting:
Must be mounted in upright position in horizontal pipe run,
downstream of all other controls except high pressure cut-off
switchifused(seeTypicalInstallations,page8).
© 2016 Maxitrol

Summary of content (8 pages)