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Item #: M411 .5

1/2in Modulation Gas Valve

Item #: M411B .5

1/2in Modulator Valve

Item #: M411B9

Modulator Head Plunger for MR212

Item #: M411W .38

Maxitrol M411 Valve .38 Pipe size

Item #: M411W-44

1/2in Modulator Valve

Item #: M511 .5

Valves designed for direct fired app. negative pressure/pull through M511.

Item #: M511 .75

Modulator Vlv 3/4in w/12A06 - Mult of 10 Maxitrol

Item #: M511R .5

Modulator Valve

Item #: M511W .75

Modulator Valve 3/4in w/Terminal Cover

Item #: M520 .75

Modulating Valve Maxitrol