Duplex Check Valves
Weidouli offers a comprehensive range of Duplex check valvesfor 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.
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 professional manual valve supplier, we provide valve for sale, valve for sale, wsv valves, etc. Contact us to know valve price or more.
在线联系供应商
Other supplier products
 |
Hastelloy Ball Valves | Hastelloy ball valvescontain ultra-low carbon and high Ni, Mo and Cr elements, which belong to corrosion-resistant and high temperature-resistant m... |
 |
Control Ball Valves | Weidouli Control Ball Valves contain an On-off control ball valve(O type ball design) and a Control Segment ball valve(V type ball design). The on... |
 |
Monel Butterfly Valves | Monel butterfly valvecorrosion resistance feature: It has an excellent anti-corrosion performance in the reducing acid medium, and resistant to any... |
 |
Super Austenitic Ball Valves | Duplex stainless steel ball valveexhibit great resistance to chloride pitting and crevice corrosion because of high molybdenum content (>6%) and... |
 |
Inconel Plug Valves | Inconel: More than twenty different grades are hiding behind this name. These materials are highly resistant to corrosion and creep and their ducti... |
Same products
 |
Sling webbings automatic cutting and winding machine | 卖方: 864244 | Sling webbings automatic cutting and winding machine New Type sling webbings automatic cutting a... |
 |
label ribbons calender machine | 卖方: 864244 | label ribbons calender machine Item No：KW-900-W300 This is a kind oflabel ribbons calender ma... |
 |
Automatic elastic tapes/laces silicone coating machines | 卖方: 864244 | Automatic elastic tapes/laces silicone coating machines Item No.: Kw-200 This is a kind of auto... |
 |
elastic tapes pre-shrinking machine | 卖方: 864244 | elastic tapes pre-shrinking machine Item No：KW-210 This is anelastic tapes pre-shrinking machin... |
 |
Starching And Finishing Machine | 卖方: 864244 | Starching And Finishing Machine Item No:KW-710A Application:this machine is widely used for thi... |
