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Dixon Sanitary 2014
800.789.1718
Dixon Sanitary SV-Series seat valves are engineered and manufactured to meet 3A sanitary standards. Occasional
issues may arise during the valves lifecycle. The following chart was developed to determine a possible cause and offer
a suggested action. Any additional questions or comments you have that are not covered by this chart can be directed to
Dixon Sanitary.
Valve Troubleshooting
Problem
Possible Cause
Suggested Action
Valve is not opening or closing completely
Plant supply air not at specified
operating pressure
Set plant supply air properly as
specified in the Dixon Sanitary
Engineering Products Catalog
An obstruction at the sealing
surface
Inspect valve and remove any
possible obstruction or blockage
Rapid seal wear
Abrassive product running through
the valve
Contact Dixon Sanitary
(800) 789-1718
Large pressure surges as
produced by water hammer
Correct system by eliminating any
sudden starts or stops
Operating temperatures above
what is reccomended for the seat
material
Contact Dixon Sanitary
(800) 789-1718
Valve is leaking between the the valve bodies.
(
Double body only)
Valve body seal ring damaged or
worn
Replace damaged or worn seal
ring
Valve body clamp is loose
Tighten clamp
Internal product leakage
Valve stem is loose
Tighten stem
Actuator loose at adapter
Contact Dixon Sanitary
(800) 789-1718
Worn seat bolt O-ring
Replace O-ring
Valve is leaking at valve port
Loose connection at the port
(
Clamp ends only)
Tighten clamp
Missing or worn union gasket
(
Clamp ends only)
Install missing union gasket or
replace worn gasket
External product leakage
Worn tank body flange gasket
(
Tank bodies only)
Replace flange gasket
Material escaping past seating surface
Excessive product pressure
Lower the product pressure as
not to exceed specified holding
pressure listed in Dixon Sanitary
Engineered Products Catalog
Supply air pressure below specified
air pressure
Increase plant supply air to correct
pressure as specified in Dixon
Sanitary Engineering Products
Catalog
Control Top is not signaling an open or closed
postion. (CT series only)
Switches may be out of alignment
due to excessive vibration
Contact Dixon Sanitary for
information on proper alignment
(800) 789-1718
Valve is not actuating when control top is energized.
(
CT series only)
Wrong voltage to the control top
Confirm the input voltage correctly
corresponds to the voltage of the
control top
Any other issue
Contact Dixon Sanitary
(800) 789-1718
SV-Series Seat Valves
A