CA Safety Center DN 20 - 1/2 inch, 10 bar, 12 l, 380 l: Safety center for closed hot water heaters according to DIN EN 1488 with expansion vessel according to DIN 4807 for hot water heating systems according to DIN 1988. Comprising: Safety group DN 20 with double shut-off, controllable and replaceable non-return valve, TÜV-certified safety valve 6, 8 or 10 bar, and insulation. Flow-through membrane expansion vessel 12 or 18 l, pre-pressure 4 bar, connection T-piece 3/4″ female thread, flow fitting with integrated maintenance shut-off and wall bracket. Suitable for horizontal and vertical installation. Max. operating pressure: 10 bar. Inlet temperature: 40 degrees C. Max. operating temperature: 70 degrees C. Max. heating output for hot water heater: 150 kW. Technical data: DN 20, 1/2″ male thread, 10 bar, membrane expansion vessel 12 l. Manufacturer: Caleffi S.P.A. Series: 528. Article number: 528821.