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.

Other supplier products

	Inconel Gate Valves	Inconel has many different grades, such asInconel600,Inconel625 and Incoloy 800H. Different grades have different corrosion resistance, being able ...
	NAB C95800 Gate Valves	Bronze gate valve flangedis mainly composed of nickel and ferromanganese. With excellent corrosion resistance, nickel aluminum bronze acts as an i...
	Control Butterfly Valves	Control butterfly valves of Weidouli are designed and manufactured in strict accordance with the latest version of API 609 specification, meanwhile...
	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...
	Duplex Plug Valves	Duplex stainless steels are called “duplex” because they have a two-phase microstructure consisting of grains of ferritic and austeniti...

供应产品

Same products

	阀	卖方: 荣腾鑫诺（天津）国际贸易有限公司	液压阀
	Class 300 Valve	卖方: GangYe Group Co.,Ltd.	Class 300 valves have a pressure rating of 300 pounds per square inch (psi) or 20.7 bar, allowing...
	Class 3000 Industrial Valve	卖方: GangYe Group Co.,Ltd.	Wafer Body, Full Port Design, Flanged End Class 3000 Ball Valve. A ball valve class 3000pressure-...
	Class 2500 Industrial Valve	卖方: GangYe Group Co.,Ltd.	Class 2500 valves can be used for both on-off and throttling applications. The specific valve typ...
	Class 150 Valve	卖方: GangYe Group Co.,Ltd.	globe valve class 150is a pressure rating designation defined by standards organizations, such as...