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INTRODUCTION / DESCRIPTION
The AVK Series 816 Butterfly Valve is a heavy duty valve designed to provide many years of service. The valve body
is lined with rubber to provide a resilient seat. The rubber seat is bonded to the valve body and cannot be replaced in the field.
The valve is designed for treated water, untreated water, and other neutral clean fluids. This manual will provide you with the
information needed to properly install and maintain the valve and to ensure a long service life.
RECEIVING AND STORAGE
Inspect valves upon receipt for damage in shipment. Unload all valves carefully without dropping. Do not allow lifting
slings, chains, fork lift forks, or other lifting devices to pass through the valve. Use eyebolts or rods through the flange holes
on large valves. Never lift the valve by its actuator.
Valves should remain crated, clean and dry until installed to prevent weather related damage. The Valve should
remain slightly open while in storage, approximately 10 degrees.
For long term storage the valves should be stored indoors. The resilient seat should not be exposed to sunlight or
other possible harmful agents such as ozone for long periods.
Electric actuators should be stored indoors. Follow the electric actuator manufacturer instructions for storage. Electric
actuators with internal heaters must have the heaters wired and operating if the temperature is below 60F and the relative
humidity is greater than 50%. Seal the wire entrance points against moisture.
INSPECTION PRIOR TO INSTALLATION
Make sure all mounting surfaces and disc seats are clean and free of foreign materials. Check the Gearbox bolting to
the valve for any loosening during transit. If loose, tighten the mounting hardware. Open and close the valve to verify operation
and proper stop adjustments for both the open and closed positions. Check that the valve rotation direction is correct and
close the valve prior to installation.
INSTALLATION
WARNING:
The line must be isolated, depressurized, and drained before installing/removing the valve to/from the
system line. Failure to do so may cause pressure to be released resulting in severe injury or death.
Correct installation of the Series 816 Butterfly Valve is important for proper operation..
FLANGED and WAFER Valves
The valve disc must be nearly closed before insertion between two opposing flanges. AVK S816 valves are
bidirectional. They may be inserted with flow in either direction.
Flanged and wafer style valves should only be mated with flat-faced pipe flanges. The valve is equipped with an
integral flange gasket, so the use of a gasket in the flanged joint is not required. The valve and adjacent piping must be
supported and aligned to prevent cantilevered stress on the valve. Once the flange bolts or studs are lubricated and inserted
around the flange, tighten them uniformly hand tight. The tightening of the bolts should then be done in graduated steps using
the star tightening method. The appropriate torques are listed in table 1. If leakage occurs, allow gaskets to absorb fluid and
check torque and leakage after 24 hours. Do not exceed bolt rating. Tighten bolts until flange faces touch. When torque values
are specified in this manual, AVK advises the use of torque wrenches.
Содержание 816 Series
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