Honeywell V4220 DATASHEET
Registration-No.
NW-6130AS2113
Alwa-R with internal
threads
Alwa-R with external
threads
V4220
Alwa-R
Backflow preventer
Product specification sheet
Application
The Alwa-R is used as backflow preventer in potable water installations. The backflow preventer with an opening pressure of ≤ 10
mbar stops water from flowing back through the valve.
The valve insert with integrated backflow preventer is available as
spare part and fits into all valve housings with dimensions according to DVGW.
Alwa-R valves are available with various pipe connections.
Alwa-K-R valves are equipped with larger external threads
specially suitable for pipe connections of various plastic pipes.
Alwa-valves are low noise to DVGW and noise protection regulations.
Valves with draining facility allow draining of the system over the
valve.
Alwa-R backflow preventer are DVGW-certified under certification-no. NW-6130AS2113.
Alwa-F-R with
flanges
Construction
The Alwa-R consists of:
• Y-pattern valve housing with test cock. Available pipe
connections see Dimensions and Ordering Information
• Valve insert with backflow preventer
• Pipe connection (accessory)
• Draining facility (optional)
Materials
• Red bronze housing
•Valve insert made of red bronze and brass
• Cone made of plastic
• Spring made of stainless steel
• Soft seals made of EPDM
• EPDM seat sealing
• Optional draining facility made of red bronze, brass and
plastic (VA3401A).
Special Features
• All parts with contact to the flow made of corrosionresistant
materials
• Opening pressure ≤ 10 mbar (up to DN 50)
• Cavity-free valve insert
• EPDM seat sealing
• Valve housing PN16 with test cock
• Draining facility (accessoires)
• Various pipe connections available
Technical Data
Medium Water
Operating temperature max. 90°C (194°F)
Operating pressure max. 16 bar (232 psi)
Opening pressure ≤ 10 mbar
kv(cv)-value DN15 5.1
DN20 10.6
DN25 17.1
DN32 29.0
DN40 35.1
DN50 64.5
EN0H-1807GE23 R0607 • Subject to change
www.honeywell.com 1
V4220 Alwa-R
Dimensions
All dimensions in mm unless stated otherwise.
Fig. 1 Alwa-R with internal threads to DIN 3502
DN kvs D1 H1 H2 L SW t
1
15 5.1 R
20 10.6 R
/2"6090652715.0
3
/4"6595753216.3
25 17.1 R 1" 65 125 90 41 19.1
1
(with draining valve)
40 35.1 R 1
32 29.0 R 1
/4" 85 130 110 50 21.4
1
/2" 90 140 120 55 21.4
50 64.5 R 2" 100 160 150 70 25.7
Table 1 Dimensions Alwa-R with internal threads
DN kvs D1 H1 H2 L1
3
15 5.1 G
/4"609070
20 10.6 G 1" 65 95 81
1
25 17.1 G 1
32 29.0 G 1
(with draining valve)
40 35.1 G 1
/4" 65 125 98
1
/2" 85 130 117
3
/4" 90 140 130
50 64.5 G 2 3/8" 100 160 152
Table 2 Dimensions Alwa-R with external threads
Fig. 2 Alwa-R with external threads
(with draining valve)
Fig. 3 Dimensions Alwa-R with internal thread on inlet and
external thread on outlet
(with draining valve)
Fig. 4 Dimensions Alwa-K-R with external threads for plastic
pipe
DN kvs D1 D2 H1 H2 L1 SW
15 5.1 R 1/2"G 3/4" 60 90 71.5 27
3
20 10.6 R
25 17.1 R 1" G 1
/4" G 1" 65 95 84.5 32
1
/4" 65 125 102 41
32 29.0 R 1 1/4"G 1 1/2" 85 130 122 50
1
40 35.1 R 1
50 64.5 R 2" G 2
/2"G 1 3/4" 90 145 134 55
3
/8" 100 160 160 70
Table 3 Dimensions Alwa-R with internal thread on inlet and
external thread on outlet
DN kvs D1 H1 H2 L
15 5.1 G 1" 60 90 70
1
20 10.6 G 1
25 17.1 G 1
/4"659581
1
/2" 65 125 98
32 29.0 G 2" 85 130 117
1
40 35.1 G 2
/4" 90 140 130
50 64.5 G 2 3/4" 100 160 152
Table 4 Dimensions Alwa-K-R with external threads for
plastic pipe
Fig. 5 Alwa-F-R with flanges
2 www.honeywell.com
DN kvs L t A A1 H1 H2
15 5.1 130 10 95 45 60 90
20 10.6 150 11 105 58 65 95
25 17.1 160 11 115 68 65 125
(with draining valve)
32 29.0 180 12 140 78 85 130
40 35.1 200 12 150 88 90 140
50 64.5 230 14 165 102 100 160
EN0H-1807GE23 R0607 • Subject to change
Table 5 Dimensions Alwa-F-R with flanges
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