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AVK SERIES 816 BUTTERFLY VALVE FIELD
Maintenance AND INSTRUCTION
MANUAL FOR BUTTERFLY VALVES 3" - 24"
EQUIPPED WITH S767 TRAVELING NUT ACTUATOR
OR HAND OPERATED LEVER
TABLE OF CONTENTS
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MAINTENANCE
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An ISO 9001 registered company
STEM SEAL REPLACEMENT
DISC POSITION ADJUSTMENT
Maintenance Manual Series 816
*Subject to change without notice. (rev. 09/16 B)
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Table of Contents
Related Manuals for AVK 816 Series
Summary of Contents for AVK 816 Series
- Page 1 AVK SERIES 816 BUTTERFLY VALVE FIELD MAINTENANCE AND INSTRUCTION MANUAL FOR BUTTERFLY VALVES 3" - 24" EQUIPPED WITH S767 TRAVELING NUT ACTUATOR OR HAND OPERATED LEVER TABLE OF CONTENTS EXPLODED ASSEMBLY / PARTS LIST INTRODUCTION / DESCRIPTION RECEIVING AND STORAGE...
- Page 2 page 1...
- Page 3 Item No. Description Material Body Ductile iron, ASTM A536 with EPDM, NSF61 Liner Shaft O-ring Drive Shaft 304 Stainless steel - Class 150, 17-4PH Stainless steel - Class 250 Stub Shaft 304 Stainless steel - Class 150, 17-4PH Stainless steel - Class 250 Disc Epoxy coated ductile iron with NiCu-7 welded edge 810*...
- Page 4 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.
- Page 5 See the instructions above for flanged and mechanical joint installation. MAINTENANCE SERIES 816 BUTTERFLY VALVE MAINTENANCE The AVK S816 butterfly valve requires no scheduled maintenance. The valve should be exercised regularly. To exercise the valve, open and close through one complete cycle. S767 ACTUATOR MAINTENANCE The S767 actuator is shown in Fgure 1.
- Page 6 Fig. 1 page 5...
- Page 7 TROUBLESHOOTING Leakage between valve and actuator: Replace O-rings Bottom Trunnion is Leaking: Remove plug and replace O-ring Leakage at flanges: Tighten Flange Bolts Valve leaks when closed: Verify the valve is within its pressure range. Open and close the valve a few times to flush away any debris that may be in the seating area. Check that the actuator bolts are tight and the actuator is not rotating back and forth when the valve is operated.
- Page 8 PARTS AND SERVICE For information on parts and service for your area contact AVK. Make a note of the valve model number and size located on the valve and contact: AVK Company 2155 N. Meridian Blvd Minden, NV 89423 PH: 775-552-1400 FAX: 775-783-7502 www.americanavk.com...
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