Honeywell V4120 DATASHEET
Registration-No.
NW-6130AS2114
Alwa-KFR
with external threads
Alwa-F-KFR with
flanges
Construction
The Alwa-KFR consists of:
• Y-pattern valve housing with test cock. Available pipe
connections see Dimensions and Ordering Information
• Valve insert with backflow preventer
• Handwheel
• Pipe connection (accessory)
• Draining facility (optional)
Materials
• Red bronze housing
•Valve insert made of red bronze and brass
• Cone made of red bronze and plastic
• Closing spring made of stainless spring steel
• Handwheel made of sheet steel, painted red
• O-rings and soft seals made of EPDM
• EPDM seat sealing
• Optional draining facility made of red bronze, brass and
EN0H-1806GE23 R0607 • Subject to change
plastic (VA3401A).
V4120
Alwa-KFR
Shutoff valve with backflow preventer
Product specification sheet
Application
The Alwa-KFR is used as shut-off valve with backflow preventer
in potable water installations. The downstream installation is
isolated by shutting off the valve with the handwheel. The integrated backflow preventer with an opening pressure of ≤ 10
mbar (to DN50) stops water from flowing back through the valve.
The valve insert with integrated backflow preventer is avail-able
as spare part and fits into all valve housings with dimensions
according to DVGW so that normal shutoff valves can be
upgraded to shutoff valves with backflow preventer.
Alwa-KFR valves are available with various pipe connections.
Alwa-K-KFR valves are equipped with larger external threads
specially suitable for 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-KFR are DVGW-certified under certification-no.
NW-6130AS2114.
Special Features
• All parts with contact to the flow made of corrosionresistant
materials
• Opening pressure ≤ 10 mbar (up to DN 50)
• Permanent easy operation due to isolated spindle
• Maintenance-free spindle sealing with additional back sealing
• Low installation height for sizes DN25 and larger with nonrising spindle
• Cavity-free valve insert
• Draining facility optionally available
Technical Data
Medium Water
Operating
temperature
Operating pressure max. 16 bar (232 psi)
Opening pressure ≤ 10 mbar ( up to DN 50)
kv(cv)-value Alwa-KFR Alwa-F-KFR
max. 90°C (194°F)
≤ 150 mbar (DN 65 - DN 100)
DN15 5.1 5.1
DN20 10.6 10.6
DN25 17.1 17.1
DN32 29.0 29.0
DN40 35.1 35.1
DN50 64.5 64.5
DN65 88.5 132.0
DN80 129.0 193.0
DN100 251.0
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V4120 Alwa-KFR
Dimensions
All dimensions in mm umless otherwise
Fig. 1 Alwa-KFR with internal threads to DIN 3502
Fig. 2 Alwa-KFR with external threads Table 2 Dimensions Alwa-KFR with external threads
DN kvs D1 D2 H L SW t
1
15 5.1 R
20 10.6 R
/2"5090652715.0
3
/4"5095753216.3
25 17.1 R 1" 80 125 90 41 19.1
1
32 29.0 R 1
40 35.1 R 1
/4" 80 130 110 50 21.4
1
/2" 80 140 120 55 21.4
50 64.5 R 2" 80 160 150 70 25.7
Table 1 Dimensions Alwa-KFR with internal threads
DN kvs D1 D2 H L
15 5.1 G 3/4"509070
20 10.6 G 1" 50 95 81
1
25 17.1 G 1
/4" 80 125 98
32 29.0 G 1 1/2" 80 130 117
3
40 35.1 G 1
50 64.5 G 2
/4" 80 140 130
3
/8" 80 160 152
65 88.5 G 3" 120 240 205
1
80 129 G 3
/2" 120 265 234
Fig. 3 Alwa-KFR with internal thread on inlet and external thread
on outlet
Fig. 4 Alwa-K-KFR with external threads for plastic pipe
DN kvs D1 D2 D3 H L SW
15 5.1 R 1/2"50G 3/4" 90 71.5 27
3
20 10.6 R
25 17.1 R 1" 80 G 1
/4" 50 G 1" 95 84.5 32
1
/4" 125 102 41
32 29.0 R 1 1/4"80G 1 1/2" 130 122 50
1
40 35.1 R 1
50 64.5 R 2" 80 G 2
/2"80G 1 3/4" 145 134 55
3
/8" 160 160 70
Table 3 Dimensions Alwa-KFR with internal thread on inlet and
external thread on outlet
DN kvs D1 D2 H L
15 5.1 G 1" 50 90 70
1
20 10.6 G 1
25 17.1 G 1
/4"509581
1
/2" 80 125 98
32 29.0 G 2" 80 130 117
1
40 35.1 G 2
50 64.5 G 2
/4" 80 140 130
3
/4" 80 160 152
Table 4 Dimensions Alwa-K-KFR for plastic pipe
2 www.honeywell.com
EN0H-1806GE23 R0607 • Subject to change
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