.

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 Weidoulisuper duplex wafer check valveincludes Duplex pressure seal check valve, duplex stainless steel check valve, Duplex single plate check valve, Duplex lift type check valve, Duplex swing check valve.

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 valvessuggested, 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 high quality duplex check valveeven 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.

There are many china control valve manufacturers, but we are one of the best choices for you.



Send product request

To: Weidouli Valves Co.,Ltd
Your E-mail:
Message text:


Send to other suppliers

Other supplier products

Hastelloy Globe Valves
Hastelloy Globe Valves Hastelloy Globe Valves There are many types of hastelloy valvessuch as Hastelloy B2, Hastelloy B3, Hastelloy C22, and hastelloy c 276 valves. Hast...
Monel Butterfly Valves
Monel Butterfly Valves Monel butterfly valvecorrosion resistance feature: It has an excellent anti-corrosion performance in the reducing acid medium, and resistant to any...
Seawater Valve
Seawater Valve Valves for Seawater Application To solve the problem of seawater corrosion, we usually choose titanium, (Super) duplex steel, nickel aluminum bron...
Hastelloy Ball Valves
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...
Stainless Steel Gate Valves
Stainless Steel Gate Valves Being able to withstand ultra-high pressure from 0.0013 MPa to 1000 MPa and ultra-high temperature from - 269 to 1430 ℃, gate valve stainlessare wi...
All supplier products

Same products

Efficient Soldering with MaAnt M061 Gold-Plated Needle
Efficient Soldering with MaAnt M061 Gold-Plated Needle Seller: Shenzhen Wikshu Technology Co. MaAnt M061 Gold-plated Drag Tin Needles with Light Carbon Fiber Handle Set Uniform and Fast Fill ...
High Hardness Linear Rail Flat Bed CNC Lathe
High Hardness Linear Rail Flat Bed CNC Lathe Seller: Zhejiang Guoyu CNC Machine Tool Co., Ltd. It can cut all kinds of turning surfaces by bicycle, such as conical surfaces, special surfaces, ...
Automation Suction Cups
Automation Suction Cups Seller: Zhejiang Shijing Tools Co., Ltd. All Rights Reserved. The ALUMINUM SUCTION CUP 6106 D is a versatile and reliable tool designed to handle various lif...
Machinery
Machinery Seller: O&K GROUP LIMITED Okwishing supplies all kinds of Machinery. Okwishing () is a cross-border e-commerce platform de...
Mini Excavator Carrier Roller for Kobelco SK045/SK045SR/SK50SR/SK70SR
Mini Excavator Carrier Roller for Kobelco SK045/SK045SR/SK50SR/SK70SR Seller: Xiamen Globe Truth (GT) Industries Co., Ltd The carrier roller use 50Mn steel, after free forging into work-piece by a 560KG air hammer, comp...