* - AVK International

Right hand side lever and weight, DN350-600

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AVK headquater in Skovby Galten, Denmark

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AVK International A/S

Bizonvej 1, Skovby, 8464 Galten, Denmark

Metal seated swing check valve with lever and weight for drinking water and neutral liquids to max. 70°C

AVK series 41 swing check valves come with both metal and resilient seats. Installed in pumping applications to prevent back flow they can be used for drinking water as well as waste water. The disc is connected to the shaft via a flexible bush that allows disc and valve seat to adjust exactly. All interior parts are stainless steel or coated with drinking water approved epoxy or EPDM. The series 41 valves are available with either closed bushings or protruding shaft end where a lever with a weight or a spring can be fitted to mitigate pressure surges.

Variant 41/36-001
Connection:	Flanged
Material:	Ductile Iron
DN:	DN350 - DN600
PN:	PN16

Features

Metal seat in high strength alu-bronze
Shaft fitted in the bonnet allows for easy maintenance without removing valve from pipeline
Shaft material 1.4021 (AISI 420) stainless steel
Position indicating lever with an adjustable weight that aids the disc in closing quickly to reduce water hammer
Hinge of ductile iron coated with drinking water approved epoxy, firmly tightened around the shaft to eliminate play
Bonnet gasket in a groove between bonnet and body to prevent blow-out
All seals and coatings with contact to the fluid are approved for drinking water - coating is blue, 250µm fusion bonded epoxy
Disc mounted in a flexible rubber bushing which allows it to tilt slightly in all directions and adjust exactly to the valve seat
Bosses on each side of the valve seat allow for installation of pressure gauge, by-pass, etc.

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Datasheet

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Certificate(s)

Installation, Operation & Maintenance

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AVK ref. no.	DN mm	Flange drilling	L mm	H mm	H3 mm	W mm	W1 mm	Theoretical weight/kg
41-350-36-00800	350	PN10	800	419	689	731	441	257
41-350-36-01800	350	PN16	800	419	689	731	441	257
41-400-36-00800	400	PN10	900	470	765	801	476	345
41-400-36-01800	400	PN16	900	470	765	801	476	345
41-450-36-00800	450	PN10	1000	518	837	871	511	477
41-450-36-01800	450	PN16	1000	518	837	871	511	477
41-500-36-00800	500	PN10	1100	570	935	931	541	637
41-500-36-01800	500	PN16	1100	570	935	931	541	637
41-600-36-00800	600	PN10	1300	630	1060	1047	600	851
41-600-36-01800	600	PN16	1300	630	1060	1047	600	851

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Components

1.	Body	Ductile iron GJS-500-7
2.	Washer	Stainless steel A2
3.	Nut	Stainless steel A2
4.	Stud bolt	Stainless steel A2
5.	Face ring	Alu-bronze CC331G (AB1)
6.	Seat ring	Alu-bronze CC331G (AB1)
7.	Bonnet	Ductile iron GJS-500-7
8.	Bolt	Stainless steel A2
9.	O-cord	EPDM rubber
10.	Guide bush	EPDM rubber
11.	Washer	Stainless steel A2
12.	Split pin	Stainless steel A2
13.	Castle nut	Stainless steel A2
14.	Stud bolt	Stainless steel A2
15.	Hinge arm	Ductile iron GJS-500-7
16.	Disc	Ductile iron GJS-500-7
17.	Protective bush	EPDM rubber
18.	Washer	Stainless Steel 1.4401 (316)
19.	Bolt	Stainless steel A2
20.	Bolt	Stainless steel A2
21.	Washer	Stainless steel A2
22.	Lever	Ductile iron GJS-500-7
23.	O-ring	EPDM rubber
24.	Bushing	Brass, DZR CW602N (CZ132)
25.	O-ring	EPDM rubber
26.	Gasket	Polyamide
27.	Air plug	Stainless steel
28.	Shaft	Stainless steel 1.4021 (420)
29.	Connector	Stainless steel 1.4408
30.	Spacer	Stainless Steel 1.4401 (316)
31.	O-ring	EPDM rubber
32.	Bushing, closed	Brass, DZR CW602N (CZ132)
33.	Weight	Ductile iron GJS-500-7
34.	Set screw	Stainless steel A2
35.	Nut	Stainless steel A2
36.	Bolt	Stainless steel A2