Duplex Valves


Duplex Valves

Contact Us For Your Requirement Of Duplex Valves!


Kinnari Steel Industry is one of the leading and foremost brands in the Steel industry. We are the best suppliers of steel products over a past decade and our product delivery is the fastest in the world. We are the most highly experienced and proficient makers of the nickel-based alloy. Kinnari Steel mainly specialises in the various nickel, stainless, duplex and super alloys in the form of a plate, sheet, bar, tubing, pipe, flanges, fittings, wire and welding material. We serve customers in various countries with all size demands. We supply, process and custom fabricate product for various industries including chemical processing, mining, oil and gas, power generation, petrochemical and more. Great emphasis is paid to value addition and after sales service. The main goal of this organisation is to provide commodities of unparalleled quality, in addition to making our client’s buying experience, a memorable one.

Today, our industry is filled with high volume but low-quality suppliers which are below the mark with what the steel industry needs. Because of such circumstances, it results in the decline of the quality of goods and hence, the entire project. But today, our firm are one of the proficient organisations in the steel industry. All our hard work and commitment are directed towards our clients an excellent purchase cycle. That makes us unique from the rest. We boast of having to distribute our products in more than 13 countries in the world for over a decade. Consequently, our clients give our company as a recommendation to other prospectors which itself is enough to prove our transcendence in the steel industry.


Valve is a product that is used to provide a leak free connection between tubes and fittings for a seamless flow of liquids and gases. Internally it consists of several parts depending on the type and application of the valve. Externally the nuts are crimped to the body with the use of ferrules. The ferrules are swaged to the tube. This is the reason of seamless leak free connection between the fitting and the tube. The buying experience using intelligent technology modules is available at our workstation.


Valves can be declassified to various subcategories:

  • Ball Valves
  • Needle Valves
  • Check Valves
  • Non-Return Valves
  • 2 way Manifold


The term “Duplex” has been coined for this kind of stainless steel because it consists of a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel and combines many of the beneficial properties of the two types which then helps in providing resistance to localised and uniform corrosion. The chemical composition of the Duplex Steel is balanced approximately to give equal amounts of ferrite and austenite in solution-annealed condition. The higher the annealing temperature, the higher the ferrite content in the steel. Although Duplex steels are prone to precipitation to nitrides and carbides type of acids that cause embrittlement and decreased corrosion resistance. If the temperature is about 4750C, probably you can say in the range of 3000-5000C it can cause embrittlement and also the decomposition of ferrite content. Duplex do have excellent ductility and toughness but they cannot reach the superior values of pure austenitic grades.


  • It offers greater strength and higher resistance to stress-corrosion cracking than most other types of stainless steel.
  • They have significantly better ductility and toughness than other ferritic grades.
  • Due to their lower alloying content, it is very less costly.
  • Duplex steels have a wide range of corrosion resistance depending upon the content of ferrite and austenite elements.
  • It has high mechanical strength.
  • Good weldability
  • Very high energy absorption
  • Low thermal expansion.


  • It is mainly used in the piping systems which are a part of the structural design of buildings and skyscrapers.
  • Seawater piping systems.
  • Cargo tanks and pipe systems in chemical tankers
  • Used in storage tanks, pressure vessels and also heat exchangers.

      We offer our products at customer-friendly prices which do not actually include the type of product the customer will buy. Although the prices of the valves will vary according to the particular element used for making the valve and also depending upon its specifications and its effective properties.


      When it comes to supplying Duplex type valves, we always make certain that our company, Kinnari Steel Industry, is one of the best manufacturers. Our products, including the valves, are widely recognised for their incomparable quality and are used by several European, Africa and Gulf-based companies. The products are stringently tested in terms of quality and control. We do provide customised marking of our products as per the client’s requirement. We boast of the highest stock in the country and the goods are available for dispatch instantly according to the client’s urgency. A team is assigned the work of instant packing and we dispatch the goods against the receipt of bank transfer. At the same time, we make sure to not diminish the quality of our products as a replacement for its perks. To prove the quality of our products we can provide copies of the test certificate from the ISO 17925 Standards laboratory, and also the copies of ISO9001:2008, ISO 14001:2004 and OHSAS 18001:2007 certifications along with the delivery. Our organisation also boasts of the quickest delivery rate in the steel industry. Additionally, we offer after sales support and service, product replacement warranty, customer-friendly price rates, consultancy for alternate sizes and material. Our organisation always strive to provide our clients with trust and complete satisfaction. We always serve each client problem per case and give an exposure to a world-class buying experience.


      At Kinnari Steel for customer’s satisfaction and to keep up to the name earned by our company, we conduct various destructive and nondestructive tests. Conducting tests on our product helps us know our product in a better way. Many tests like positive material identification (PMI) tests, chemical analysis tests, hardness test, micro test, flaring test, flattening test, hydrostatic test, radiography test, eddy current tests are conducted.


      The products shipped from Kinnari Steel will have complete marking details. These details are in accordance with the test certificate we supply. In a case of orders for the cut piece of Pipes, Sheets or Round Bars, the marking is transferred from the product from which it is cut. In such cases, we provide Letter confirming the marking transfer and picture of the product from which it is cut.


      Kinnari Steel provides a certificate of origin legalised/attested by a chamber. Also, a commercial invoice including HS code is provided. Our product packing lists which come with the product includes a number of boxes, net weight and gross weight. We provide test certificate certifying NACE MRO103, NACE MR0175. Along with this, a raw material test report is provided as well. Our laboratory reports that are NABL approved also is provided to our loyal customers. Other reports like raw material reports, heat treatment charts and letter of guarantee is also provided.


      We offer price basis depending on your requirements. It can be based on previous works, FOB Nhava Sheva, CFR, CIF, CPT your destination port or your door to door delivery duty which can be paid or unpaid.


      At Kinnari Steel, you get stock options with shortest manufacturing time. If you contact us, we assure you a response within 24 hours.We don’t give false assurance. This helps us in maintaining good relations with our customers. It is advisable that you let us do the shipping process as it is cost-effective as well as efficient. The product we supply comes with full traceability made of genuine raw materials. The raw material is selected as per your requirements at the minimum price possible.

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