Double Check Backflow Preventer
Meet or exceed the requirements of AWWA C511、AS/NZS 2845.1 and C/T 160 Standard.
High-grade protection,maximum prevention of siphon backflow and back pressure backflow.
Through way type of construction,wide body,design of dual Independent check valve,assures the stability of the working condition.
Nice appearance,internal parts made of stainless steel,high strength.good corosion resistance.
Streamline Design of main valve disc makes the friction are sistance of overcurrent is small,ensures low pressureloss at the highest flow rate.
Flanged,compact structure,horizontal or verticalinstallation.
Ductile lron complies with ASTM、A536 and GBStandard,Fusion Bonded Epoxy Coated Interior and Exterior to ANSI/AWWA C550 Standard.
Wide valve chamber,light weight,convenient for installation,testing,and maintenance of check valves.
Gate valve with Bucket Strainer can prevent impurities from entering the body,reduce the wear of internal parts.
|
Part |
Material |
Specification |
|
Body |
Ductile iron |
EN-GJS-450-10 |
|
Check valve spring |
Stainless steel |
|
|
Check valve stem |
Stainless steel |
304 |
|
Bonnet |
Ductile iron |
EN-GJS-450-10 |
|
Circlip |
Stainless steel |
304 |
|
Check valve seat |
EPDM Fully Encapsulated Stainless steel |
|
|
Check valve disc |
EPDM Fully Encapsulated Stainless steel |
|