* - AVK International

Integral seat, IP68 gearbox, for buried installation, DN150-1200

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AVK headquater in Skovby Galten, Denmark

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AVK International A/S

Bizonvej 1, Skovby, 8464 Galten, Denmark

Double eccentric butterfly valve PN25 with integral seat and IP68 gearbox, 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 GSK approved epoxy coating and the corrosion protected shaft end zones ensure high durability. The valves are suitable for bi-directional application.

Variant 756/106-781
Connection:	Flanged
Material:	Ductile Iron
DN:	DN150 - DN1200
PN:	PN 25
Closing direction:	Clockwise to Close

Features

Machined and epoxy coated ductile iron seat integrated in the body
The double eccentric design combined with a tilted disc allows release of seal compression after only few degrees of opening resulting in low operating torque
Disc firmly fixed to the shaft to prevent fluttering and a slight tilt allows for precise adjustment of the closed position
Disc seal profile and rubber quality ensure low closing torque
All rubber parts are drinking water approved by multiple institutes
Fasteners in stainless steel A2
Stainless steel shaft and seal retainer ring
All threaded connections are sealed with O-rings for protection against medium and environment
Radial bearings in self-lubricating PTFE/bronze composite
Shaft ends: DN≤600: Fitted with an end cover that seals the disc interior against corrosion. DN≥700: Fully encapsulated in the disc and fixed with O-ring sealed dowels held in place with a security plate. Key and keyway as backup
Replaceable shaft seals with two EPDM O-rings and an NBR gasket protecting against contamination from outside
Body and disc of ductile iron with fusion bonded epoxy coating 250µm RAL 5017 in compliance with DIN 3476 part 1 and EN 14901, approved by GSK and WRAS-DVGW/W270/UBA
IP68 Rotork gear, for buried purpose, operated by extension spindle. Coated black RAL9005, 250µm. Input shaft, bolts and nuts in stainless steel AISI 316

Downloads

Datasheet

Appendix

Tender Text

Certificate(s)

Installation, Operation & Maintenance

Animation

AVK butterfly 756 2024.mp4

Outline drawings DWG

Outline drawings DXF

Outline drawings IGS

Outline drawings STEP

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AVK ref. no.	DN mm	Flange drilling	D1 mm	L mm	L1 mm	L2 mm	H2 mm	W1 mm	W2 mm	W3 mm	W4 mm	W5 mm	Theoretical weight/kg
756-0150-1-74006	150	PN25	#12.3	210	-	-	192	162	260	-	-	176	38
756-0200-1-74006	200	PN25	#12.3	230	-	-	223	190	288	-	-	176	54
756-0250-1-74006	250	PN25	#12.3	250	-	-	268	223	333	-	-	186	85
756-0300-1-74006	300	PN25	#12.3	270	1	12	303	253	368	17	115	186	109
756-0350-1-74006	350	PN25	#12.3	290	19	25	331	288	393	155	176	186	144
756-0400-1-74006	400	PN25	#12.3	310	34	40	373	320	435	217	234	186	184
756-0450-1-74006	450	PN25	#12.3	330	48	54	411	345	503	270	285	262	248
756-0500-1-74006	500	PN25	#12.3	350	63	69	454	375	546	325	338	262	296
756-0600-1-74006	600	PN25	#12.3	390	92	98	541	430	632	424	434	339	472
756-0700-1-74006	700	PN25	#12.3	430	124	130	566	483	706	527	537	391	661
756-0800-1-74006	800	PN25	#12.3	470	155	161	650	546	815	626	635	391	570
756-0900-1-74006	900	PN25	#12.3	510	185	191	701	593	865	721	729	391	1127
756-1000-1-74006	1000	PN25	#12.3	550	216	222	771	663	935	813	824	391	1424
756-1200-1-74006	1200	PN25	#12.3	630	268	272	899	768	1031	982	987	452	2306

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Components

1.	Key	Stainless steel A2
2.	Drive 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.	Dowel	Stainless steel
10.	Disc	Ductile iron GJS-500-7 (GGG-50)
11.	O-ring	EPDM rubber
12.	Centre flange	Ductile iron GJS-500-7 (GGG-50)
13.	Security plate	Stainless steel
14.	Screw	Stainless steel A2
15.	O-ring	EPDM rubber
16.	Spring washer	Stainless steel A2
17.	Washer	Zinc
18.	O-ring	EPDM rubber
19.	Body	Ductile iron GJS-500-7 (GGG-50)
20.	Nut	Stainless steel A2
21.	Washer	Stainless steel A2
22.	Bolt	Stainless steel A2
23.	O-ring	EPDM rubber
24.	Washer	Stainless steel A2
25.	O-ring	EPDM rubber
26.	Bolt	Stainless steel A2
27.	Seal retainer ring	Stainless steel 420
28.	Disc seal	EPDM rubber
29.	Screw	Stainless steel A2
30.	Bolt	Stainless steel A2
31.	O-ring	EPDM rubber
32.	Washer	Stainless steel A2
33.	O-ring	EPDM rubber
34.	Safety key	Stainless steel A2
35.	End plate	Ductile iron GJS-500-7 (GGG-50)
36.	Gasket	EPDM rubber
37.	Screw	Stainless steel A2
38.	Thrust bearing	Bronze
39.	Screw	Stainless steel A2
40.	Stub shaft	Stainless steel 431
41.	Screw	Stainless steel A2
42.	Gearbox	Cast iron

Test/Approvals

Hydraulic test according to EN 1074-1 and 2 / EN 12266
Approved according to DIN-DVGW Certificate NW-6201BR0451 (DN≤1200)
Approved according to KIWA Certificate K 6320 (DN≤800)
Approved according to WRAS Certificate No. 2206003
Approved for drinking water according to WRAS Certificate No. 2307007 (DN900-1200)