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INTRODUCTION / DESCRIPTION
AVK eccentric plug valves are designed with built-in safety in every detail. Plug valves are used for isolation purposes
in water and wastewater installations, for pump control shut-off and flow control applications. The plug is fully vulcanized
with AVK’s own rubber compound (either EPDM or NBR) which, due to its sturdy design and double bonding vulcanization,
features an outstanding durability, with the plugs rubber ability to regain its original shape. The valve has a welded nickel
seat and a full port design allowing high flow capability with minimal headloss when in the fully open position. The valve
body, bonnet and ISO mounting flange are all epoxy coated internally and externally for optimal corrosion resistance. The
valve design incorporates a unique integral ISO operator mounting flange which provides increased flexibility when selecting
gearbox or electrical actuator units.
UNLOADING:
All valves should be carefully unloaded. Each valve should be carefully lowered from the truck to the ground; it should
not be dropped. Do not lift valves with slings or chain around actuator or through waterway. Lift valves with eyebolts or rods
through flange holes or chain hook at the ends of valve parts. Failure to carefully follow these recommendations is likely to
result in damage to the valve as well as risk of personal injury.
INSPECTION AFTER UNLOADING:
AVK eccentric plug valves should be inspected for damage at the time of receipt. The initial inspection should verify
compliance with specifications, direction of opening, size and flange details. A visual inspection of the seating surfaces should
be performed to detect any damage in shipment or scoring of the seating surfaces. Inspection personnel should look for any
other evidence of mishandling during shipment. Each valve should be operated through one complete opening-and-closing
cycle in the position in which it is to be installed.
STORAGE:
1. The plug valves should be stored in a manner that protects them from the environment, preferably indoors.
2. The valves should be stored with the plug in the open position to prevent unnecessary compression of the rubber
compound.
3. The plug should also be protected from sunlight, ozone and chemical exposure.
4. In colder climates, valves should be drained and left slightly open before storage. Failure to do so may result in damage
to the valve castings from water freezing.
5. Valves stored outside should be stored with the plug core in the vertical position. If the valves are stored in the horizontal
or flat position, rainwater may accumulate in the valve cavity, potentially causing damage due to water freezing
