BUILDING TRADES

301-4 Altitude Pilot Valve

An altitude pilot valve that is spring and diaphragm operated; it controls the water level in a reservoir by sensing the hydrostatic head. When the hydrostatic head equals the spring force, the pilot connects port “X” (connection to main valve inlet ) to port “K” (connection to main valve bonnet). The main valve closes. When the hydrostatic pressure decreases slightly, the port “X to K” connection is closed by the inner valve. When the hydrostatic pressure is reduced even further, the pilot connects port “K” (main valve bonnet) to “EX” (exhaust to atmosphere). Then the main valve opens.

Model 301-4 pilot is used as the standard pilot on all 106 and 206 series altitude valves.

301-4 Altitude Pilot Valve

• The pilot shall be Singer model 301-4 with the spring range specified.
• The pilot shall consist of a ductile iron housing and shall have a protective fusion bonded coating, which conforms to the ANSI / AWWA C116 / A21.16 (current version) specification.
• The 3-way valve body, seat and stem shall be of stainless steel construction.
• The inner valve shall have EPDM resilient compound for seating. The EPDM compound must be permanently bonded to the inner valve and be ground flat and square to assure maximum performance.
• The pilot shall utilize a rolling diaphragm stem seal to eliminate friction when the pilot actuates.
• The 3-way valve body shall be serviceable without removing the pilot from the valve. The inner valve shall be replaceable

Download Specification Document

301-4 Altitude Pilot Valve

For more information on the 301-4:

Download the 301-4 Product Guide.

Download the 301-4 Operations Guide.

301-4 Altitude Pilot Valve

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