Inlet-side negative pressure

When the inlet pressure drops, both check valves close. The drain valve (3) opens as soon as the pressure difference Δp between the inlet chamber (A) and the middle chamber (B) reaches a value just below the pre-calculated value on the contrast spring (5). The drain continues until the intermediate chamber of the system separator is empty. In this way, an air zone (safety zone) is created and prevents contaminated water from the circuit (C) from flowing back into the water supply network, even in the event of the backflow preventer (2) failing. As soon as the normal condition is restored (inlet pressure higher than outlet pressure), the drain valve closes and the
System separator is operational again.

Outlet-side overpressure

If the pressure in the outlet chamber (C) rises to the point where it exceeds the inlet pressure (A), the backflow preventer (2) closes, preventing the water already supplied to the consumer from flowing back toward the public water supply. If the backflow preventer (2) leaks or another malfunction occurs in the system separator, the system separator always interrupts (disconnects) 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, cover and drain seat
• made of dezincification-free brass alloy.
• Restraint system rods and springs
• made of stainless steel.
• Seals made of NBR.
• Max. operating temperature: 65 degrees C.
• Max. operating pressure: 10 bar.
• Active Safety device.
• Complete with upstream, intermediate and downstream measuring connections
• Drain funnel with pipe fastening.
  

Download

• Installation instructions
• Operating instructions