15mm DZR Brass Double Check Valve

Double check valve with test port and compression ends - brass plug

These check valves are monodirectional devices, allowing the backflow prevention of fluid under pressure. They are normally used in domestic water installations, booster pump systems, heating systems, central heating systems, heat generators (wall-mounted boilers, solid fuel generators, heat pumps). Sealing is permitted through forces exerted by a spring and by the fluid pressure against a gasket which guarantees the seal even at very low back pressures. Moreover, the force of the spring allows the valve to have a universal characteristic concerning the installation position. The peculiarity of this range of valves is the presence of two check valve inserts and one test port between the two inserts. The double check valve creates an intermediate chamber to separate with more safety the downstream fluid from the upstream fluid, avoiding any backflow toward the upstream circuit. The test port can be used to check the correct working of the downstream check

valve.

This valve can be used as antipollution device in potable water systems.

Features

Working temperature range (peaks): -20 (see suitable fluids)–110 °C

Working temperature range: 0 (no frost) –95 °C

Opening pressure: 0,05 bar

Max working pressure: 16 bar

Suitable fluids: water for thermal systems, glycol solutions (max 30%), potable water

Threaded connections: ISO 228-1

compression ends EN 1254-2

Materials

1 - Body: brass EN 12165 CW602N (DZR)

2 - Nut: brass EN 12165 CW617N

3 - Olive: annealed copper

4 - Plug: brass EN 12164 CW602N (DZR)

5 - Insert: POM+NBR

6 - Locking ring: phosphorous bronze