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Installation, Operation and Maintenance Manual
AVK Series 854 Ball Float Valve
The AVK 854 is a series of ball float valves designed to be fitted within a tank or in the
top of a reservoir to control the filling and maintain a pre-determined water level.
The system operates by a float that closes the valve when rising and opens it when
lowering.
The float is made of polypropylene or stainless steel, the internal valve parts are
copper alloy and the valve housing is epoxy coated ductile iron.
Level difference between fully open and fully closed is between 170 mm for DN 50 to
930 mm for DN 300.
Page 1 of 10
Copyright © AVK Holding A/S, original version, rev. 10, 30-June-2020
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Summary of Contents for AVR AVK Series
- Page 1 Installation, Operation and Maintenance Manual AVK Series 854 Ball Float Valve The AVK 854 is a series of ball float valves designed to be fitted within a tank or in the top of a reservoir to control the filling and maintain a pre-determined water level.
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Page 2: Avk Series 854 Exploded View
AVK series 854 exploded view Page 2 of 10 Copyright © AVK Holding A/S, original version, rev. 10, 30-June-2020... -
Page 3: Avk Series 854 Parts List
AVK series 854 parts list Item Description Material Body Ductile iron Cylinder retainer flange Ductile iron Fulcrum bracket Ductile iron Cylinder DZR Brass Piston Bronze Bolt Stainless steel Float ball Stainless steel / PP Lever Steel, stainless / hot dip galvanized... -
Page 4: Table Of Contents
Table of contents AVK series 854 exploded view ..................2 AVK series 854 parts list ....................3 Table of contents ....................... 4 Principle of operation ......................5 Health and safety at work ....................5 Receiving and storage ....................... 6 Installation and commissioning ..................7 Application hazards ...................... -
Page 5: Principle Of Operation
Principle of operation Series 854 Ball Float Valve controls discharge of water into a tank or reservoir in response to water level variations. The float mechanism holds the valve closed until the water levels drops, the float then follows the water level matching inflow to outflow. If the outflow ceases, the water level will rise and the float close the valve. -
Page 6: Receiving And Storage
All workers handling the product must be aware of the weight of the components or assemblies to be handled and manipulated during installation and maintenance. It is essential that staff undertaking these operations are adequately trained and it is the responsibility of the end user that only trained and competent staff undertake these duties. -
Page 7: Installation And Commissioning
Installation and commissioning The valve is sensible to dust and dirt on its upper parts where the piston slides in the cylinder, so if installed outdoors or in a dusty or otherwise dirty environment it must be protected in a suitable valve chamber with sufficient cover from objects and debris falling from above. -
Page 8: Operation And Maintenance
Operation and maintenance 9.1. Operation The complete assembly must be able to move freely and easily up and down between fully open and fully closed. Make sure all pin joints and linkages are greased and checked for freedom of movement. By adding water into the float through the filler cap it is possible to finely adjust the regulated height of the water surface level. -
Page 9: Seal Renewal
9.3. Seal renewal 1. Remove the piston assembly 2. Remove piston seal ring (14) 3. Clean and lubricate seal groove (15) 4. Check seal ring for cracks or damage, replace if necessary 5. Install seal ring 6. Remove bottom nut (20) 7. -
Page 10: Troubleshooting
10. Troubleshooting Symptom: Valve sticks Cause: Piston is stuck in the cylinder Cure: Disassemble, clean and lubricate the piston assembly. Replace worn or damaged parts Symptom: Valve sticks Cause: Worn bushings and pins Cure: Replace worn parts Symptom: Water level is unstable Cause: Worn bushings and pins Cure:...
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