Alwa-KFR (V4120) Shutoff valve with integrated backflow preventer
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| 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 integral 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 so that normal shut-off valves can be upgrated to shut-off 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 pipe connections of various plastic pipes. Valves with draining facility allow draining of the system over the valve. |
| For potable water systems. |
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| Approvals |
Alwa-KFR are DVGW-certified under registration-no. NW-6130AS2114 and low noise according to DIN 4109. |
| Materials |
All parts with contact to the flow made of corrosion resistant red bronze, stainless steel or plastic |
| Body pattern |
Y-pattern |
| Integrated non-return device |
yes |
| Max. media temperature |
90 oC |
| Static pressure |
PN16 |
| Additional description |
Suitable connections see 'Connections for Alwa-valves'. |
| DN size | Port diameter | Port connection type | Kvs value | Type |
|---|
| mm | inch | | | |
|---|
| 15 | R1/2 | internal threads | 5,1 | V4120YY015  | | 20 | R3/4 | internal threads | 10,6 | V4120YY020 | | 25 | R1 | internal threads | 17,1 | V4120YY025 | | 32 | R1 1/4 | internal threads | 29 | V4120YY032 | | 40 | R1 1/2 | internal threads | 35,1 | V4120YY040 | | 50 | R2 | internal threads | 64,5 | V4120YY050 |
| DN size | Port diameter | Port connection type | Kvs value | Type |
|---|
| mm | inch | | | |
|---|
| 15 | G3/4 | external threads | 5,1 | V4120XX015 | | 20 | G1 | external threads | 10,6 | V4120XX020 | | 25 | G1 1/4 | external threads | 17,1 | V4120XX025 | | 32 | G1 1/2 | external threads | 29 | V4120XX032 | | 40 | G1 3/4 | external threads | 35,1 | V4120XX040 | | 50 | G2 3/8 | external threads | 64,5 | V4120XX050 | | 65 | G3 | external threads | 88,5 | V4120XX065 | | 80 | G3 1/2 | external threads | 129 | V4120XX080 |
| DN size | Port diameter | Port connection type | Kvs value | Type |
|---|
| mm | inch | | | |
|---|
| 15 | R1/2+G3/4 | internal and external threads | 5,1 | V4120YX015 | | 20 | R3/4+G1 | internal and external threads | 10,6 | V4120YX020 | | 25 | R1+G1 1/4 | internal and external threads | 17,1 | V4120YX025 | | 32 | R1 1/4+G1 1/2 | internal and external threads | 29 | V4120YX032 | | 40 | R1 1/2+G1 3/4 | internal and external threads | 35,1 | V4120YX040 | | 50 | R2+G2 3/8 | internal and external threads | 64,5 | V4120YX050 |
| DN size | Port diameter | Port connection type | Kvs value | Type |
|---|
| mm | inch | | | |
|---|
| 15 | R1/2 | internal threads | 5,1 | V4119YX015 | | 20 | R3/4 | internal threads | 10,6 | V4119YX020 |
| DN size | Port diameter | Port connection type | Kvs value | Type |
|---|
| mm | inch | | | |
|---|
| 15 | G1 | external threads | 5,1 | V4120KK015 | | 20 | G1 1/4 | external threads | 10,6 | V4120KK020 | | 25 | G1 1/2 | external threads | 17,1 | V4120KK025 | | 32 | G2 | external threads | 29 | V4120KK032 | | 40 | G2 1/4 | external threads | 35,1 | V4120KK040 | | 50 | G2 3/4 | external threads | 64,5 | V4120KK050 |
| DN size | Port diameter | Port connection type | Kvs value | Type |
|---|
| mm | inch | | | |
|---|
| 15 | — | flanges | 5,1 | V4120FF015 | | 20 | — | flanges | 10,6 | V4120FF020 | | 25 | — | flanges | 17,1 | V4120FF025 | | 32 | — | flanges | 29 | V4120FF032 | | 40 | — | flanges | 35,1 | V4120FF040 | | 50 | — | flanges | 64,5 | V4120FF050 | | 65 | — | flanges | 132 | V4120FF065 | | 80 | — | flanges | 193 | V4120FF080 | | 100 | — | flanges | 251 | V4120FF100 |
| Description | Additional Product Type |
|---|
| Valve insert with integrated backflow preventer for all valve housings to DVGW, for DN15 | VS1401B015 | | Valve insert with integrated backflow preventer for all valve housings to DVGW, for DN20 | VS1401B020 | | Valve insert with integrated backflow preventer for all valve housings to DVGW, for DN25 | VS1401B025 | | Valve insert with integrated backflow preventer for all valve housings to DVGW, for DN32 | VS1401B032 | | Valve insert with integrated backflow preventer for all valve housings to DVGW, for DN40 | VS1401B040 | | Valve insert with integrated backflow preventer for all valve housings to DVGW, for DN50 | VS1401B050 | | Valve insert with integrated backflow preventer for all valve housings to DVGW, for DN65 (opening pressure 150 mbar) | VS1401A065 | | Valve insert with integrated backflow preventer for all valve housings to DVGW, for DN80 (opening pressure 150 mbar) | VS1401A080 | | Handwheel, red, for DN15 to DN20 | VS2400B050 | | Handwheel, red, for DN25 to DN50 | VS2400B080 | | Handwheel, red, for DN65 to DN80 | VS2400B120 |
| Description | Additional Product Type |
|---|
| Draining valve, for DN15, DN20 and DN25 | VA3401A008 | | Draining valve, for DN32, DN40, DN50, DN65 and DN80 | VA3401A010 | | Insulation shells, for valves DN15 | VA2510C015 | | Insulation shells, for valves DN20 | VA2510C020 | | Insulation shells, for valves DN25 | VA2510C025 | | Insulation shells, for valves DN32 | VA2510C032 | | Insulation shells, for valves DN40 | VA2510C040 | | Insulation shells, for valves DN50 | VA2510C050 | | Sampling valve with connection size G1/4 for building valves up to DN25 | VA4250A008 | | Sampling valve with connection size G3/8 for building valves from DN32 to DN80 | VA4250A010 |
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