300X Semi-closed check valve

Product Overview

The 300 X slow-closing check valve is an intelligent valve installed at the pump outlet of the water supply system, designed to prevent backflow of media, water hammer, and water impact phenomena. It combines the functions of an electric valve, a check valve, and a water hammer eliminator.

This technology effectively enhances the safety and reliability of water supply systems by integrating the technical principles of delayed opening, rapid closing, and delayed closing to eliminate water hammer effects, thereby preventing both pump-start and pump-stop water hammer. It is widely applied in water distribution networks for high-rise buildings, residential areas, and urban water supply projects.

Product Features

Small in size, lightweight, and easy to maintain

Operates on hydraulic self-control, requiring no additional equipment or energy sources, making it environmentally friendly.

The valve disc remains unaffected by the medium, achieving rapid closure followed by gradual shut-off, thereby preventing destructive water hammer effects.

Stainless steel hard seal with excellent sealing performance, wear resistance, and long service life.

Technical parameters

Model: 300X

Design and Manufacturing Standard: JB 10674-2006

Sealing test pressure: 1.76 MPa

Applicable medium: water

Connection type: Flange connection
Nominal pressure: 1.6 MPa

Shell test pressure: 2.4 MPa

Media temperature: 0–80°C

Connection Standard: JB/T79

Structure size 

Material List