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.
在线联系供应商
Other supplier products
 |
Stainless Steel Globe Valves | Cast steel globe valvefeature molybdenum-alloyed construction and offer high resistance to pitting corrosion. Globe valves are named for their sphe... |
 |
Duplex Ball Valves | Duplex ball valveshave the advantages of both ferritic stainless steel and austenitic stainless steel: austenitic stainless steel reduces the britt... |
 |
Monel Check Valves | Weidouli offers a comprehensive range of Monel check valve for all types of applications and industries. Dual plate check valves have ASME JB/T 89... |
 |
NAB C95800 Check Valves | Weidouli offers a comprehensive range of NAB C95800 check valve for all types of applications and industries, including the nozzle check valve, NAB... |
 |
Hastelloy Gate Valves | Hastelloy Gate Valves Hastelloy contains ultra-low carbon and high Ni, Mo and Cr elements, which belongs to corrosion-resistant and high temperatu... |
Same products
 |
"High-reliability Support ring Y10-4 for power station | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "High-reliability Support ring Y10-4 for power station Deyang YOYIK have power plant professional... |
 |
"Wear Resistance dn50 globe valve WJ25-F1.6P for thermal power plant | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "Wear Resistance dn50 globe valve WJ25-F1.6P for thermal power plant YOYIK professional productio... |
 |
High-efficiency Superheater outlet plug valve SD61H-P61305V SA-182 F92 for power generation | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "High-efficiency Superheater outlet plug valve SD61H-P61305V SA-182 F92 for power generation Deya... |
 |
Automated Sealing gasket for corrugated pipe shut-off valve KHWJ25F3.2P for power station | 卖方: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "Automated Sealing gasket for corrugated pipe shut-off valve KHWJ25F3.2P for power station Is a m... |
 |
Class 1500 LB gate valve | 卖方: Magpie Valve Packing Gasket Co., Ltd | Product Name: Low-EmissionPacking Setfor Class 1500 LB API 6D Gate ValveModel: M600Size: ID 68 mm... |
