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Reduced-pressure-zone backflow preventer BA, RPZ-Valve
figure 361 01
• to protect drinking water against backflow of fluids up to and including category 4 according DIN EN 1717 / DIN 1988-100
• wetted parts made of stainless steel
• flange connection
• inlet and outlet with check cartridge
PROTECT RPZ backflow preventer, type BA, flanged
figure 360 0G
• to protect drinking water against backflow of fluids up to and including category 4 according DIN EN 1717 / DIN 1988-100
• wetted metal parts made from dezincification-free and corrosion-resistant gunmetal, resistant against aggressive water
• male union thread
• inlet and outlet with check cartridge
PROTECT RPZ backflow preventer, type BA, union thread
figure 365 0G
• to protect drinking water against backflow of fluids up to and including category 4 according DIN EN 1717 / DIN 1988-100
• for heating water with inhibitors
• wetted metal parts made from dezincification-free and corrosion-resistant gunmetal, resistant against aggressive water
• consisting of shut-off, pressure reducing valve, RPZ backflow preventer Type BA and pressure gauge
• male union thread
• inlet and outlet with check cartridge
FILL-MATIC 4 combi filling valve type BA for heating systems
figure 367 01
• to protect drinking water against backflow of fluids up to and including category 4 according DIN EN 1717 / DIN 1988-100
• wetted metal parts made from dezincification-free and corrosion-resistant gunmetal, resistant against aggressive water
• inlet male pipe thread
• suitable for connection to the elbow wallplates
FK-4 RPZ backflow preventer outlet type BA
figure 367 01 025
• to protect drinking water against backflow of fluids up to and including category 4 according DIN EN 1717 / DIN 1988-100
• suitable for connection to the elbow wallplates
• wetted metal parts made from dezincification-free and corrosion-resistant gunmetal, resistant against aggressive water
• inlet male pipe thread
FK-4 RPZ backflow preventer outlet type BA
figure 367 01 050
• to protect drinking water against backflow of fluids up to and including category 4 according DIN EN 1717 / DIN 1988-100
• wetted metal parts made from dezincification-free and corrosion-resistant gunmetal, resistant against aggressive water
• inlet male pipe thread
FK-4 RPZ backflow preventer outlet type BA
figure 368 02
• for normative refilling of appartment heating installations
• to protect drinking water against backflow of fluids up to and including category 4 according DIN EN 1717 / DIN 1988-100
• suitable for connection to the elbow wallplates
• with union adapter and collar for installation in cramped confines
• made of brass, nickel plated
RPZ backflow preventer outlet for appartments type BA
- Stop Valves ꁕ
- Safety Valves ꁕ
- Pressure Reducing Valves and Filter
- Balancing valves ꁕ
- Measuring Products
- Hygiene System KHS ꁕ
- Thermal separators
- Flush-mounted valves
- Stop valves water meter combinations ꁕ
- Frost-proof outdoor taps
- TRESOR Cabinets ꁕ
- Sampling Valves
- ThermoSystem KTS ꁕ
- Other Valves
- Accessories ꁕ
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Spare parts
ꁕ
- Spare parts for stop valves
- Spare parts for protection and safety valves
- Spare parts for pressure reducing valves and filters
- Spare parts for balancing valves
- Spare parts for measuring products
- Spare parts for sampling valves
- Spare parts for flush-mounted valves
- Spare parts for stop valve water meter models
- Spare parts for frost-proof outdoor taps
- Spare parts for TRESOR cabinets
- Spare parts for hygiene system KHS
- Spare parts for dirt traps
- Handwheels and gaskets
Fluid category 4 safety valves
KEMPER RPZ backflow preventers type BA protect drinking water from non-potable water up to and including fluid category 4.
Definition of fluid category 4 based on DIN EN 1717
Fluid that represents a health hazard for human beings through the presence of one or more toxic or very toxic substances or one or more radioactive, mutagenic or carcinogenic substances.
Practical use examples:
- Chemical mixing means, e.g. disinfectants, fertilisers, etc.
- Heating filling device, water with inhibitors
- Non-certified softening systems
- High-pressure cleaners
You can find more information on choosing the right safety valves in our guidebook.
How does an RPZ backflow preventer work?
RPZ backflow preventers are based on a three-chamber system with supply pressure, medium pressure and back pressure zones. The differential pressure controllers of the protection cartridge on the inlet side and the check valve (RV) on the outlet side ensure reliability and a high level of safety.
1. Rest position (under operating pressure)
If no removal of water occurs, the check and and bleeder valve are closed on the inlet and outlet sides.
2. Flow position
When water is being removed, the check valves on the inlet and outlet sides are open and the bleeder valve is closed.
3. Disconnection position
In the event of siphon backflow, the pressure on the inlet side drops. The bleeder valve reacts before the differential pressure falls below 140 mbar. The check valves on the inlet and outlet sides close, bleeder valve opens.
Reduced-pressure-zone backflow preventer BA,
RPZ-Valve
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