Industry News

Hardide Coatings Secures Approval from Flowserve on a New Line of Coated Metal Ball and Seats

Published on 2009-07-27. Author : SpecialChem

HOUSTON -- Hardide Coatings' unique tungsten carbide-based coating has been approved for use on a new line of coated metal ball and seats, and has secured first orders from leading provider of flow control products and services, Flowserve Corporation.

Flowserve has approved Hardide for use on its McCANNA standard metal seated valve applications. The use of Hardide has enabled Flowserve to offer the base metal in 316SS steel for use in severe service applications that require metal to metal seating, including abrasive and slurry applications.

Flowserve will offer Hardide as a standard metal seated option for the McCANNA seal top entry ball valve on 1/2" to 4" RP/FP, ANSI 150-1500 and cryogenic to 800OF maximum temperature applications. These results follow two years of co-operation between the companies which included extensive engineering design and testing. Hardide is also working with Flowserve on the re-design and testing of two other product lines with results expected within the next three to six months.

Dan Wilson, Hardide's US-based Business Development Manager said: "Hardide coated balls and seats were still operational after more than 70,000 cycles in slurry where Stellite failed in 29,000 cycles. This is a prime example where Hardide has worked closely with a customer to engineer and prove a coating solution which gives their product competitive edge both technically and commercially."

Hardide Coatings manufactures and applies tungsten carbide-based coatings to a wide range of engineering components made from ferrous and nickel-based alloys. Its patented technology provides a unique combination of ultra-hardness, toughness, low friction and chemical resistance in one coating. The technology is proven to offer dramatic cost savings through reduced downtime and extended part life. The coating is particularly suited to oil and gas industry sealing and bearing surface applications. Customers include leading energy services companies, as well as aerospace and other general engineering manufacturers.

The Hardide Technology

The Hardide coating process is performed in a Chemical Vapour Deposition (CVD) furnace and is applied to customer supplied components which are heated to approximately 500oC/930oF depending on the substrate and the application. Once at the desired temperature, a controlled mixture of gases is pumped into the furnace. In the furnace chamber, a chemical reaction takes place between the gases which crystallizes on the surface of the components producing a smooth layer of binder-free tungsten carbide coating with abrasion, erosion and chemical resistant characteristics. This process uniquely enables all parts of the component including internal surfaces to be coated.

Source: Hardide Coatings

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