* - AVK International

Integral seat, IP68 gearbox, plate disc, long, internal enamel, for buried installation, DN700-800

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Henrik Steen Christensen

Product Manager, butterfly valves

Double eccentric butterfly valve to EN 593 with integral seat, IP68 gearbox and internal enamel. For drinking water and neutral liquids to max. 70°C

AVK double eccentric butterfly valves are designed with tilted disc for easy operation. The disc seal is made of AVK’s drinking water approved EPDM rubber featuring an excellent compression set and thus ability to regain its original shape. The high quality epoxy coating / internal enamel and fully encapsulated shaft/disc connection ensure high durability. The valves are suitable for bi-directional application.

Variant 756/106-691
Connection:	Flanged
Material:	Ductile Iron
DN:	DN700 - DN800
PN:	PN10/16
Closing direction:	Clockwise to Close

Features

The tilted disc releases the compression of the disc sealing after a few degrees of opening resulting in low operating torque
The disc seal profile and rubber quality ensure low closing torques
All rubber parts are multi approved
Seal retainer ring of stainless steel
The threaded bolt holes in the disc are corrosion protected with O-rings
Machined and enamel coated ductile iron seat integrated in the body
Shaft of stainless steel with self-lubricating bearings
The shaft ends are fully encapsulated in the disc and are fixed with dowels corrosion protected with O-rings and a stainless steel security plate. Key and keyway as backup
Replaceable shaft sealing with two EPDM O-rings on each side of a bronze bushing, and a flat NBR gasket
Body of ductile iron with internal enamel coating in compliance with DIN51178, EN ISO 11177 and DEV, and external fusion bonded epoxy coating in compliance with DIN 3476 part 1 and EN 14901, GSK approved.

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Installation, Operation & Maintenance

Animation

AVK butterfly 756 2024.mp4

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AVK ref. no.	DN mm	Flange drilling	D mm	L mm	L1 mm	L2 mm	H2 mm	W1 mm	W2 mm	W3 mm	W4 mm	W5 mm	Theoretical weight/kg
756-0700-1-04106	700	PN10	600	430	127	133	550	448	641	533	543	396	444
756-0700-1-14106	700	PN16	700	430	127	133	550	455	641	533	543	517	517
756-0800-1-04106	800	PN10	600	470	156	162	620	508	711	627	636	396	592
756-0800-1-14106	800	PN16	800	470	156	162	620	513	711	627	636	517	663

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Components

1.	Key	Stainless steel A2
2.	Valve shaft	Stainless steel 431
3.	Seal housing	Bronze
4.	O-ring	EPDM rubber
5.	O-ring	EPDM rubber
6.	Self-lubricating bearing	Bronze / PTFE composite
7.	Disc cover	Stainless steel
8.	Disc cover gasket	EPDM rubber
9.	O-ring	EPDM rubber
10.	Dowel	Stainless steel A2
11.	O-ring	EPDM rubber
12.	Body	Ductile iron GJS-500-7 (GGG-50)
13.	Disc	Ductile iron GJS-500-7 (GGG-50)
14.	Screw	Stainless steel A2
15.	Security plate	Stainless steel
16.	Screw	Stainless steel A2
17.	O-ring	EPDM rubber
18.	Spring washer	Stainless steel A2
19.	O-ring	EPDM rubber
20.	Washer	Zinc
21.	Nut	Stainless steel A2
22.	Washer	Stainless steel A2
23.	Screw	Stainless steel A2
24.	Screw	Stainless steel A2
25.	Thrust bearing	Bronze
26.	Screw	Stainless steel A2
27.	End plate	Ductile iron GJS-500-7 (GGG-50)
28.	Gasket	EPDM rubber
29.	Stub shaft	Stainless steel 431
30.	Safety key	Stainless steel A2
31.	Screw	Stainless steel A2
32.	Screw	Stainless steel A2
33.	O-ring	EPDM rubber
34.	Bolt	Stainless steel A2
35.	Washer	Stainless steel A2
36.	O-ring	EPDM rubber
37.	Seal retainer ring	Stainless steel
38.	Disc seal	EPDM rubber
39.	Gearbox	Cast iron