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Rotary Lobe Positive Displacement Sludge Pumps for Pumping Sludge
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Chlorides, Hydroxides, H2S

Chlorides, Hydroxides, H2S and Other Applications Requiring Special Metals

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Our 316 Stainless Steel C-Series line Chemical and Corrosive Pumps satisfactorily handle many chemical and corrosive applications. However, sometimes a different type of stainless steel such as Duplex Steel is required. These include applications with fluids containing chlorides, hydroxides, fluorides, bromides or H2S. Such applications are frequently found in Oil & Gas processing. 

For more details on these applications see “Corrosive Engineering” Additionally duplex is specified instead of 316 SS in applications which are both corrosive and abrasive because duplex is tougher and harder than 316 Stainless Steel.

LobePro stocks duplex steel parts for fast delivery of our D-Series duplex steel wet end pumps in a broad range of sizes. All LobePro Duplex parts are solution annealed and passivated. This is very important to obtaining the best resistance to chloride corrosion, pitting and cracking.

LobePro can provide pumps with wetends made in most types of austenitic, martensitic or duplex stainless steels and high nickel alloys such as Hastelloy. LobePro stocks Hastelloy CW-2M wetends, the cast version of Hastelloy C4, in the S16 pump size. Hastelloy CW-2M, is approximately 65% nickel, 16% chrome and 16% molybdenum. Other sizes and metal types are available with an approximately 4 month lead-time. Applications requiring high nickel alloys include those where hydrogen embrittlement, caustic chemical corrosion, and chemicals oxidation, especially at temperatures over 40°C are worries to name a few.

See “Corrosive Engineering” for further information.

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