Duplex Check Valves
Weidouli offers a comprehensive range of Duplex check valves for all types of applications and industries. As for dual plate check valves, they have JB/T 8937 & API 594 design, wafer type. As for the end connections: Flange RF, Wafer & Lug are all standard units.
The other available type of Weidouli Duplex check valves includes Duplex pressure seal check valve, Duplex nozzle check valve, Duplex single plate check valve, Duplex lift type check valve, Duplex swing check valve.
01/02
Duplex Check Valves
02/02
Duplex Check Valves
Material Definition Of Duplex Check Valves
Duplex stainless steel is a steel that has half of the ferrite phase and half of the austenitic phase in its quenching structure, and generally, the minimum phase content must be up to 30%.
Material Features Of Duplex Check Valves
Corrosion Resistance
Excellent general corrosion resistance; superior to Stainless steel in most environments. Excellent resistance to localized corrosion including intergranular, pitting, and crevice corrosion; the CPT of Duplex steel is generally at least 35ºC. The grade is also resistant to chloride stress corrosion cracking (SCC) at temperatures of up to about 150ºC. Duplex steel will often perform well in environments that cause premature failure of austenitic grades. It has better resistance to seawater than Stainless steel.
Heat Resistance
Although Duplex steel has good high-temperature oxidation resistance, this grade - like other duplex stainless steels - suffers from embrittlement if held for even short times at temperatures above 300ºC. If embrittled, this can only be rectified by a full solution annealing treatment. Duplex stainless steels are almost never used above 300ºC.
What is the Difference Between a Single Check Valve and a Duplex Check Valve?
A single check valve protects against the risk of backflow and back-siphonage contamination while a double check valve is typically two single check valves linked together. As the name of the two types of check valves suggested, a double check valve seems to function as two single check valves. In fact, a double check valve can provide safe backup if one of the single check valves fails for any reason. What is more, a double check valve even has screws on each side of a single check valve so that the valve port can be opened and cleaned, as debris can build up over time.
What is a Duplex Check Valve Used for?
A duple check valve is made of a mixture of an austenitic phase and a ferrite phase. With strong corrosion resistance, a duple check valve can be used in various industrial applications such as pharmaceutical equipment, chemical equipment, seawater equipment, heat exchange, power generation, petrochemicals, gas processing, specialty chemicals, etc.
As a valve manufacturer, we can provide sorts of butterfly valve chinafor sale, if you are interested, please contact us.
Send product request
Other supplier products
 |
Control Plug Valves | Control Plug Valvecan rotate 90° to connect or cut the medium. Body cavity with grooves and convex edges structure design can fix sleeve effect... |
 |
Gate Valves | China industrial gate valves are used to cut off or connect media transmission, and are suitable for pipeline systems in petroleum, chemical, therm... |
 |
Inconel Check Valves | Weidouli offers a comprehensive range of Inconel check valves for all types of applications and industries. As for pressure seal check valves, i... |
 |
What Is The Difference Between Gate Valve And Globe Valve? | What Is The Difference Between A Gate Valve And A Globe Valve ? It is important to understand the difference between the gate valve and the valve ... |
 |
Monel Butterfly Valves | Monel butterfly valvecorrosion resistance feature: It has an excellent anti-corrosion performance in the reducing acid medium, and resistant to any... |
Same products
 |
China Gate valve | Seller: Yuanda Valve Group Co.,Ltd. | China Gate valve China Gate valve A is a type of valve that uses a gate or wedge-shaped dis... |
 |
Gate Valve Vs. Ball Valve | Seller: Yuanda Valve Group Co.,Ltd. | Gate Valve Vs. Ball Valve Gate valves and ball valves are both types of valves that are used... |
 |
Non Return Valve Suppliers China | Seller: Yuanda Valve Group Co.,Ltd. | Non Return Valve Suppliers China refers to the opening and closing member for the circular v... |
 |
Common Types Of Check Valves | Seller: Yuanda Valve Group Co.,Ltd. | Common Types Of Check Valves A is a valve whose switching parts are disc-shaped and rely on ... |
 |
Brass ball valve | Seller: Yuanda Valve Group Co.,Ltd. | Brass ball valve Brass ball valve Applications: Water Supply: Commonly used in residentia... |
