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 Pressure Rise Indicates the Presence of Steam

Each Model Contains an SPST Micro Switch Snap Acting Switch

Sensitive Pressure-Actuated Diaphragm Expands or Contracts with Pressure Variations, Moving a Lever Mechanism Which Operates the Snap Switch

A Screw on Top of the Case Allows Set Point Adjustment without Removing the Cover

Differential is Adjusted by Means of a Dial Located Inside the Case

Twist-To-Fit Universal Flange, Rotates 90 Degree to Fit Most Installations with a Single Product

Three Pump Sizes Cover Every Application

3-Speed Versatility Maximize Efficiency and Provide Sufficient Flow Rates with a Single Pump

Universal Design Replaces Wide Range of Competitive Models with Just One Brand

Familiar Setup-If you Know How to Install an Existing Panel, You can Install Ours Too, We Offer the Same Board Layout and Matching Functionality as Competitive Product

Status Panel -LED Panel is Visible and Functional Whether the Cover is on or off Which Gives the Installer the Ability to Quickly Troubleshoot the System Saving Time and Effort

Flex Panel Mounting - Gravity Centered Hang Hole Makes Quick Work of Mounting

Hinged Door and Quarter Turn Access Screw - Quarter Turn Access and Hinge Off Front Cover Make Access Quick and Easy While Still Providing Safety

Simple Layout Cover - Control Board is Covered to Reduce Visual Clutter and Provide a Surface on Which to Print Full Color Terminal Labels. Easy-to-Understand Labels Coded to Wire Colors will Increase Installation Speed and Decrease Errors

Familiar Setup-If you Know How to Install an Existing Panel, You can Install Ours Too, We Offer the Same Board Layout and Matching Functionality as Competitive Product

Status Panel -LED Panel is Visible and Functional Whether the Cover is on or off Which Gives the Installer the Ability to Quickly Troubleshoot the System Saving Time and Effort

Flex Panel Mounting - Gravity Centered Hang Hole Makes Quick Work of Mounting

Hinged Door and Quarter Turn Access Screw - Quarter Turn Access and Hinge Off Front Cover Make Access Quick and Easy While Still Providing Safety

Simple Layout Cover - Control Board is Covered to Reduce Visual Clutter and Provide a Surface on Which to Print Full Color Terminal Labels. Easy-to-Understand Labels Coded to Wire Colors will Increase Installation Speed and Decrease Errors

Familiar Setup-If you Know How to Install an Existing Panel, You can Install Ours Too, We Offer the Same Board Layout and Matching Functionality as Competitive Product

Status Panel -LED Panel is Visible and Functional Whether the Cover is on or off Which Gives the Installer the Ability to Quickly Troubleshoot the System Saving Time and Effort

Flex Panel Mounting - Gravity Centered Hang Hole Makes Quick Work of Mounting

Hinged Door and Quarter Turn Access Screw - Quarter Turn Access and Hinge Off Front Cover Make Access Quick and Easy While Still Providing Safety

Simple Layout Cover - Control Board is Covered to Reduce Visual Clutter and Provide a Surface on Which to Print Full Color Terminal Labels. Easy-to-Understand Labels Coded to Wire Colors will Increase Installation Speed and Decrease Errors

Twist-To-Fit Universal Flange, Rotates 90 Degree to Fit Most Installations with a Single Product

Three Pump Sizes Cover Every Application

3-Speed Versatility Maximize Efficiency and Provide Sufficient Flow Rates with a Single Pump

Universal Design Replaces Wide Range of Competitive Models with Just One Brand

Twist-To-Fit Universal Flange, Rotates 90 Degree to Fit Most Installations with a Single Product

Three Pump Sizes Cover Every Application

3-Speed Versatility Maximize Efficiency and Provide Sufficient Flow Rates with a Single Pump

Universal Design Replaces Wide Range of Competitive Models with Just One Brand

Quiet Operation

Automatic Recycling Manual Operator Shows Valve Position at All Times

Built-In Auxiliary Contacts to Control Burner or Circulator Relay

Motor Can be Removed from Valve Assembly without Draining System