Basic information of Double Check Valve Backflow Preventer
This valve is installed in various pipeline systems to strictly prevent the backflow of the medium, and to protect the following medium or equipment from pollution.
Part |
Material |
Standard |
Body |
Ductile Iron |
EN 1563/DIN 1693 |
Ductile Iron |
EN 1563/DIN 1693 |
|
Seat |
CuZn39Pb1 / C37000 |
EN12167/ASTM B135 |
Stem |
Stainless Steel 431 |
EN10088-1/ASTM A959 |
Spring |
Stainless Steel 431 |
EN10088-1/ASTM A959 |
Seal |
EPDM / NBR |
ISO 4633 |
For the materials options not listed, consult factory. ZECO manufactures valves in more than 50 different alloys. |
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