Purpose
This valve is used to prevent the medium in the pipeline from backflow and features a small volume.
Features
A simple structure,reliable performance,easy installation and repair.The disc uses a torsion spring for resetting,has water harmer preventing function and can be mounted on horizontal and vertical pipeline.
Executive standard 
Face to face length:DIN3202-K3/API 594
Test and inspection:GB/T 13927
Main Parts Material

Body,DISC:Cast Iron/Ductile Iron

Stem:Stainess steel

Technical Datesheet

Dimensions