Features and application:  1. Purpose: This valve is installed on the water connection charge and the charge meter at or behind the user, to prevent water backflow into the branch network in charge of pollution caused by net charge.  2. Features: ① multiple layers of protection, anti-reflux effect is reliable. ② both ends of the valve structure between the two forms, one with automatic scheduling  Pollution control (B), and the other a double flap valve (A type).

The main performance parameters:  ◆ Nominal pressure: PN1.6Mpa  ◆ Shell test pressure: 2.4Mpa  ◆ Sealing test pressure: 1.76Mpa  ◆ Temperature: ≤ 80 ℃  ◆ Suitable medium: water