* - AVK International

With free shaft end, prepared for limit switch, DN80-300

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AVK headquater in Skovby Galten, Denmark

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AVK International A/S

Bizonvej 1, Skovby, 8464 Galten, Denmark

Swing check valve, resilient seated with free shaft end, prepared for limit switch. 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 41/60-001
Connection:	Flanged
Material:	Ductile Iron
DN:	DN80 - DN300
PN:	PN16

Features

Clear way and full bore for low head loss and easy pig-cleaning
Resilient seat provides a drop tight closure and due to the light weight it requires a minimum of force to open/close
Shaft fitted in the bonnet allowing for easy maintenance without removing valve from pipeline
Shaft in 1.4021 (AISI 420) stainless steel
Free protruding shaft end for mounting of lever and weight or spring to assist valve closing and avoid water hammer
Hinge of stainless steel for sizes ≤ DN 200; ductile iron coated with drinking water approved epoxy for larger sizes
Bonnet gasket lying in a groove between bonnet and body prevents blow-out
All seals and coatings with contact to the fluid are approved for drinking water - coating is blue, 250µm fusion bonded epoxy
Disc is designed with a steel insert fully vulcanized with EPDM rubber
Bosses on each side of the valve seat allow for installation of pressure gauge, by-pass, etc.
Prepared for limit switch indicating closed position

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Datasheet

Appendix

Certificate(s)

Installation, Operation & Maintenance

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AVK ref. no.	DN mm	Flange drilling	H mm	H3 mm	L mm	W mm	D mm	Theoretical weight/kg
41-080-60-0180041	80	PN10/16	135	235	260	237	200	16
41-100-60-0180041	100	PN10/16	150	260	300	255	220	22
41-125-60-0180041	125	PN10/16	211	346	350	332	250	36
41-150-60-0180041	150	PN10/16	212	354	400	332	285	41
41-200-60-0080041	200	PN10	247	417	500	392	340	62
41-200-60-0180041	200	PN16	247	417	500	392	340	62
41-250-60-0080041	250	PN10	347	571	600	689	405	185
41-250-60-0180041	250	PN16	347	571	600	689	405	185
41-300-A0-0080041	300	PN10	391	654	699	689	460	200
41-300-A0-0180041	300	PN16	391	654	699	689	460	200

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Components

1.	Nut	Stainless steel A2
2.	Washer	Stainless steel A4
3.	Spacer	PA
4.	Disc insert	Steel S275JR
5.	Body	Ductile iron GJS-500-7
6.	Bonnet gasket	EPDM rubber
7.	Washer	Stainless steel A2
8.	Bolt	Stainless steel A2
9.	Disc rubber	EPDM rubber
10.	Bolt	Stainless steel A4
11.	Washer	Stainless steel A4
12.	Hinge	Stainless steel 316
13.	Bolt	Stainless steel A4
13.	Bolt	Stainless steel A2
14.	Shaft	Stainless steel
15.	O-ring	EPDM rubber
16.	Bushing, open	Brass, DZR CW602N
17.	O-ring	EPDM rubber
18.	O-ring	EPDM rubber
19.	Bonnet	Ductile iron GJS-500-7
20.	Key	Stainless steel A4
21.	Bushing, closed	Brass, DZR CW602N