Inlet-side negative pressure

When the inlet pressure drops, both backflow preventers close. The drain valve (3) opens as soon as the pressure difference Δp between the inlet chamber (A) and the intermediate chamber (B) reaches a value just below the pre-calculated value at the contrast spring (5). The draining continues until the intermediate chamber of the system separator is empty. In this way, an air zone (safety zone) is created, preventing contaminated water from flowing back from circuit (C) into the water supply network, even if the backflow preventer (2) fails. Once normal conditions are restored (inlet pressure higher than outlet pressure), the drain valve closes.
The system separator is functional again.

Outlet overpressure

If the pressure in the outlet chamber (C) rises to a level that exceeds the inlet pressure (A), the backflow preventer (2) closes, thus preventing the backflow of water already supplied to the consumer towards the public water supply. If the backflow preventer (2) leaks or another malfunction occurs in the system separator, the system separator will always interrupt (separate) the connection between the consumer and the public water supply.Like all devices with a positive effect, the system separator is technically and structurally designed to guarantee the highest safety standards in every situation.

Technical data

• System separator type BA. AG connections.
• 1/2". Housing, lid and drain seat
• Made of dezincification-resistant brass alloy.
• Rods of the restraint system and springs
• made of stainless steel.
• Seals made of NBR.
• Maximum operating temperature: 65 degrees C.
• Maximum operating pressure: 10 bar.
• Active Safety device.
• Complete with upstream, intermediate and downstream measuring connections
• Drain funnel with pipe attachment.
  

Download

• Installation instructions
• User manual