Resideo Braukmann BA095 BAmini
Backflow Preventer
Product Overview
The Braukmann BA095 BAmini is a backflow preventer, also known as a system separator or disconnecteur, designed to protect the drinking water network from contamination. It operates by dividing the water flow into three distinct pressure zones, ensuring that water cannot be forced back into the supply system. The device is compact and suitable for horizontal installation with the discharge valve directed downwards.
The device features an integrated cartridge with a check valve and discharge valve, an inlet sieve, an outlet check valve, and a discharge connection. It is available with 1/2" or 3/4" connection sizes.
Safety Guidelines ⚠️
- Always follow the installation instructions provided.
- Use the appliance only for its intended purpose, ensuring it is in good condition and operated with due regard for safety and risk of danger.
- The appliance is exclusively for use in the applications detailed in these instructions. Any other use is considered improper and will invalidate the warranty.
- All assembly, commissioning, servicing, and adjustment work must be carried out by authorized personnel only.
- Immediately rectify any malfunctions that may influence safety.
- Do not install in places where flooding can occur.
- The installation environment should be protected against frost and well-ventilated.
- Do not use cleaning agents containing solvents or alcohol on plastic parts, as this may cause damage. Ensure no cleaning agents enter the environment or sewerage system.
Description of Function
The BA type backflow preventers are divided into three pressure zones. The pressure in zone A is higher than in zone B, which is in turn higher than in zone C. A discharge valve is connected to zone D, which opens at the latest when the differential pressure between zones A and D drops to 0.14 bar. Water from zone D discharges to atmosphere, causing both check valves to close. This separates zone A from zones B and C, preventing back pressure or back siphonage into the supply network. The pipework connection is interrupted, thereby protecting the drinking water network.
Application
| Medium | Water |
| Maximum inlet pressure | 10.0 bar |
| Minimum inlet pressure | 1.5 bar |
Technical Data
| Installation position | Horizontal with discharge valve downwards |
| Max. operating temperature | 65°C |
| Discharge pipe connection | DN 40 |
| Nominal diameter | DN 10 |
| Connection size | 1/2", 3/4" |
Scope of Delivery
The backflow preventer consists of:
- Housing
- Valve cartridge with integral check valve and discharge valve
- Integral sieve on inlet
- Outlet check valve
- Discharge connection
- Check ball valves
Variants
- BA095-3/8E: Standard version with 1/2" external threads on housing.
- BA095-3/8EZ: Special version with 3/4" external threads on housing.
Assembly and Installation
7.1. Installation Guidelines
- Install shutoff valves before and after the backflow preventer.
- Install in horizontal pipework with the discharge valve directed downwards.
- Ensure good access for maintenance and inspection.
- If a fine filter is not installed in the drinking water system, installing a filter with a mesh width of 100µm is recommended upstream of the backflow preventer.
- In case of fluctuating pre-pressure or an input pressure over 10 bar, a pressure regulator should be installed upstream of the backflow preventer.
- Do not install in places where flooding can occur.
- The installation environment must be protected against frost and well-ventilated.
- Install discharge pipework with adequate capacity.
- Thoroughly flush the pipework before installation.
7.2. Assembly Instructions
- Thoroughly flush the pipework.
- Install the backflow preventer:
- Mount the dirt strainer on the input side.
- Install in horizontal pipework with the discharge connection directed downwards.
- Note the flow direction (indicated by arrow).
- Install without tension or bending stresses.
- Provide a straight section of pipework of at least five times the nominal valve size after the backflow preventer.
- Attach the drain pipe to the discharge connection (e.g., plastic pipe HT 40).
- The appliance is ready for use.
Exploded View Description: The device is shown disassembled, revealing its main components. From top to bottom: the main housing with inlet and outlet connections, followed by internal parts including a sieve, the cartridge insert (containing the check and discharge valves), a retaining ring, and finally a black protective base or housing for the discharge connection.
Maintenance
Regular maintenance is crucial for the reliable operation of the backflow preventer and the protection of the drinking water network. It is recommended to contract a specialized installation company for maintenance. All maintenance must be performed by authorized personnel.
- Inspection: Every 6 months (depending on local conditions). Performed by an installation company using a test control unit and maintenance set. This includes testing the discharge valve (by lowering inlet pressure to check for opening/dripping) and the outlet check valve.
- Maintenance: Annually, in accordance with DIN EN 1717.
8.2.1. Cartridge Insert Replacement/Cleaning:
- Close inlet and outlet shutoff valves.
- Depressurize the outlet side.
- Remove discharge connection and retaining ring.
- Replace or clean the cartridge insert and lip seal. Do not disassemble the cartridge insert into smaller parts.
- Reassemble in reverse order, ensuring the cartridge snaps into place.
- Test function.
8.2.2. Check Valve Replacement:
- Close inlet and outlet shutoff valves.
- Depressurize the outlet side.
- Remove plug, retaining ring, and the check valve. Note: The check valve is destroyed upon removal and must be replaced.
- Reassemble in reverse order.
- Test function.
8.3. Cleaning
Plastic parts should be cleaned without solvents or alcohol. Ensure no cleaning agents enter the environment or sewerage system.
- Cartridge Insert Cleaning: Follow steps similar to replacement, but clean the insert and lip seal.
- Sieve Cleaning: Unscrew the inlet pipework, remove, clean, and reinsert the sieve.
Disposal
The device is composed of brass housing, high-quality synthetic material components (cartridge, check valve, discharge connection), and elastomer sealing elements. Dispose of the device in accordance with local regulations for waste recycling and disposal.
Troubleshooting
| Problem | Cause | Remedy |
|---|---|---|
| Discharge valve opens without apparent reason | Pressure strokes in water supply system | Install a pressure reducing valve upstream the backflow preventer |
| Fluctuating inlet pressure | Install a pressure reducing valve upstream the backflow preventer | |
| Discharge valve doesn't close | Cartridge insert is contaminated | Remove cartridge insert and exchange it |
| Deposits on valve seat | Remove cartridge insert and clean or exchange it | |
| Damaged O-ring | Remove cartridge insert and exchange it | |
| Leaky discharge valve | Remove cartridge insert and clean or exchange it | |
| Flow is too low | Inlet strainer is blocked | Remove strainer and clean it |
Spare Parts
| No. | Description | Dimension | Part No. |
|---|---|---|---|
| 1 | Cartridge insert complete | 3/4" | KE195 |
| 2 | Check valve insert complete | 3/8" | RVE095 |
Accessories
The following accessories are available for inspection and maintenance:
- TK295 Test kit: Electronic pressure measuring device with digital display, battery-operated. Includes case and accessories, ideal for inspection and maintenance of BA backflow preventers.
- TKA295 Test kit: Analog pressure measuring device with differential pressure display. Includes case and accessories, ideal for inspection and maintenance of BA backflow preventers.
- WS195 Maintenance-set: Maintenance kit for system separators, for use with TK295 or TKA295 test kits.
Forms and Declarations
The document includes several forms related to the installation and verification of the backflow preventer:
- Declaration of Intent to Install: A form to notify local health authorities (S.R.I.P.S. or A.R.S.) at least two months before installation, detailing the proposed installation and the protected system.
- Notice of Commissioning: A form to notify authorities after the device has been installed and put into service, confirming its installation and providing relevant details.
- Control Sheet: A comprehensive checklist for periodic verification and testing of the device, including external checks, observations, and detailed test procedures with pressure readings. This sheet is crucial for ensuring the continued effectiveness of the protection.
