Page 15
Rev. 5/2021
www.willoughby-ind.com
Installation & Operation Manual
Aquafount
®
180° Washfountain
WAF-3603-PSL-FT
Willoughby Industries, Inc.
TOLL FREE (800) 428-4065
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(317) 875-0830
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(317) 875-0837
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of valve is used for lavatories as well as showers.
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strainers keep normal line debris from interfering with the mechanical components of the valve.
By virtue of its design, a pneumatic self-closing valve is a normally closed valve. The valve will open when the hand or
foot pushbutton is depressed. The valve will close when the hand or foot pushbutton is released.The operating sequence
of the valve begins with pressing the pushbutton. Depressing the pushbutton forces air through the tubing into the air side
top cover of the valve. The air pressure on top of the actuating diaphragm causes the diaphragm and magnet to be forced
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Releasing the pushbutton relieves pressure through the tubing which releases the pressure above the actuating
diaphragm. The lack of air pressure on top of the actuating diaphragm allows the magnet spring to lift the magnet up and
away from the water side actuating disk. The water side spring on top of the water side actuating disk then forces the disk
downward. This seals the pilot hole in the seat diaphragm assembly. The water pressure then increases above the seat
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extends through the center of the 3-pronged insert holding the water-side diaphragm and is opened and closed by a
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diaphragm assembly kit should be installed.
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assembly kit should be installed.
Self-closing Pneumatic Valve-
Operation and Maintenance
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