oduct InfoLiteratureOverviewHigh limit, low limit and/or circulator controllers used to regulate boiler water temperature in gas- or oil-fired hydronic heating systems.FeaturesAn immersion type liquid-filled sensing element actuates two snap switches.One switch operates as a high limit control.The other switch operates as a low limit and/or circulator control, depending on the model.Controller may be mounted in any positioning and needs no leveling.Separate, easy-to-read, calibrated dial and...

OverviewAquastat® Controllers are immersion type devices for limiting or regulating the temperature of liquids in boilers, storage tanks, and other applications where temperature control is required. Honeywell's L4006 are used in applications that utilize the existing wellsFeaturesTotally enclosed Micro Switch™ snap-acting switches operate on temperature rise to setpoint.Visible control point scale and external adjustment screw permit easy setting.Horizontal or vertical insertion of the...

OverviewAquastat® Controllers are immersion type devices for limiting or regulating the temperature of liquids in boilers, storage tanks, and other applications where temperature control is required.FeaturesRemote temperature sensing element detects and responds rapidly to temperature changes.Totally enclosed Micro Switch™ snap-acting switch.Visible control point scale and external adjustment screw permit easy setting.Available horizontal or vertical mounting of the remote element into boiler,...

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div>FeaturesStainless steel diaphragm for use with steam, air, noncombustible gases and fluids non-corrosive to stainless steel.L4079W is for Oil Applications.Micro Switch™ snap-acting switches open automatically on pressure rise; must be manually reset.Mount using 1/4 in. NPT female fitting on diaphragm assembly or surface mount through back of case. Product SpecificationsApplicationProvide limit control of steam, air, non-combustible gases or non-corrosive fluidsDimensions (in.)5 in. high x...

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Honeywell Pressure Controller 1 psi - 5 psi Adj. The PA404 is a series 40 (2-wire, SPST) pressuretrol controller for use in 24, 120, 240 or 277 volt control circuits or in self powered (millivoltage) applications. Features The PA404A is a pressure actuated high limit, safety control for steam heating boilers. It breaks an electrical circuit to shut down the burner if steam pressure rises above a safe level.The PA404B is used with suspension-type unit heaters to make the fan circuit when a...

HoneyWell Reverse Acting Pressuretrol controller with additive 1 to 5 psi differential pressure. The PA404 is a series 40 (2-wire, SPST) pressuretrol controller for use in 24, 120, 240 or 277 volt control circuits or in self powered (millivoltage) applications. Features The PA404A is a pressure actuated high limit, safety control for steam heating boilers. It breaks an electrical circuit to shut down the burner if steam pressure rises above a safe level.The PA404B is used with...

Honeywell Pressuretrol® Controllers, Auto recycle, 2 psi to 15 psi.Provide operating control with automatic limit protection for pressure systems up to 300 psi (2068 kPa).FeaturesUse with steam, air, noncombustible gases, or fluids non-corrosive to pressure sensing element.Models have snap-acting switching to open or close a circuit on pressure rise.Have adjustable differentials.Adjustments are made by screws on top of case.Mount using 1/4 inch -18 NPT internal pipe threads or surface...

Honeywell Manual Reset Pressuretrol® Limit Controller, 2 psi to 15 psi. High pressure limit switches. Features Stainless steel diaphragm for use with steam, air, noncombustible gases and fluids non-corrosive to stainless steel.L4079W is for Oil Applications.Micro Switch™ snap-acting switches open automatically on pressure rise; must be manually reset.Mount using 1/4 in. NPT female fitting on diaphragm assembly or surface mount through back of case. ...

Provide operating control with automatic limit protection for pressure systems up to 300 psi (2068 kPa). Features Use with steam, air, noncombustible gases, or fluids non-corrosive to pressure sensing element.Models have snap-acting switching to open or close a circuit on pressure rise.Have adjustable differentials.Adjustments are made by screws on top of case.Mount using 1/4 inch -18 NPT internal pipe threads or surface mount through base of case.Ground screw terminal. ...