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Hot water under control: standard-complying protection of water heaters.

Pressure relief valves are designed to protect water heaters and installations against overpressure caused by the heating of water. With a range including membrane pressure relief valves, various models of the proven safety groups SYRobloc or the SafetyCenter 4807 with an anti-Legionella membrane expansion vessel, SYR offers everything that is required for the connection and protection of unvented water heaters. In accordance with standards, of course. And always under consideration of the service-friendliness. As, we from SYR attach importance to facilitating the installers’ work. Thus, our valves always provide total safety — easily and in no time.

SYRobloc 25


DN 15 (R ½) 6 bar 0025.15.000 8 bar 0025.15.001 10 bar 0025.15.002 DN 15 (R ¾) 6 bar 0025.15.009 8 bar 0025.15.010 10 bar 0025.15.011 DN 20 (R ¾) 6 bar 0025.20.000 8 bar 0025.20.001 10 bar 0025.20.002 DN 20 (R 1) 6 bar 0025.20.009 8 bar 0025.20.010 10 bar 0025.20.011
For the connection of unvented (pressurized) water heaters in accordance with DIN 1988. Certified by DVGW and acoustic approval class 1. Includes a shut-off valve, a check valve with test device, a second shut-off valve (DN 20), a diaphragm pressure relief valve with a stainless steel valve seat, an extendable tundish and an additional pressure reducing valve. Outlet pressure adjustment range 1.5 to 6 bar. Factoryset to 4 bar. Body made of hot-pressed brass. Standard settings 6, 8 and 10 bar.
Hans Sasserath GmbH & Co. KG
Mühlenstraße 62
D-41352 Korschenbroich
+49 2161 6105-0