Double check valve made of brass 3/4" for expansion tank

Product detailed description

The double check valve ZZ-SZ20 with 3/4" connection is a fitting for central heating installations, intended for expansion vessels. Its function is to prevent water in the system from flowing in the opposite direction to the intended one. The body is made of brass and the manufacturer issues a declaration of conformity for all valves.

Main Features

• prevents reverse flow of water in the system
• intended for central heating installations
• body made of brass
• working media: hot and cold water for water supply systems
• nominal pressure 10 bar and maximum operating temperature 100 °C
• declaration of conformity is issued for all valves

Technical Data

Application and Installation

The check valve allows the medium to flow in only one direction and closes when the flow is reversed. When installed in a heating system, therefore, ensure the correct orientation according to the direction in which the water should flow. Before installation, check that the pressure and temperature in the system do not exceed the values in the table, and use an appropriate sealing for the G3/4 threaded connection. Dimensions B and C will help you determine in advance how much space the valve will occupy in the piping layout.

Frequently Asked Questions

What medium can flow through the valve?

The manufacturer specifies hot and cold water for water supply systems; the valve is also intended for central heating installations.

What pressure and temperature is the valve rated for?

The nominal pressure is 10 bar (1.0 MPa) and the maximum operating temperature is 100 °C.

What material is the valve made of?

The valve body is made of brass.