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Titanium ball valve withstands environment testing
HOUSTON – Watson Grinding & Mfg., Watson Valve Services, Inc. announce Barrick Technology Centre R&D titanium ball valve ball and seat with chrome oxide coating unaffected by test environment.
The ½”-Ti/CrO ball valve spent approximately 480-hours in service at temperature and pressure over about 2-years. There was no catastrophic failure to the ½”-ball valve; a leak in the soft seal was the only issue. The typical autoclave temperature was 225°C (437°F) with total pressure approximately 455-psig for multiple pilot runs.
The purpose of the R&D ½”-Ti/CrO ball valve was to study the level of corrosion upon failure. The test environments ran were the autoclave pilot programs for Goldstrike ore feed and Pascua Lama concentrate feed – both acidic at discharge where this valve was exposed (with approximately 20-g/L H2SO4 free acid and 60-g/L H2SO4 free acid). This valve acted as the primary discharge isolation ball valve which sees the hot acidic slurry but not duty cycled like the discharge valve.
The metallurgical evaluation performed by the Watson Coatings Laboratory division concluded the chrome oxide coating was unaffected by the test environment with no excessive wear to critical parts.
About Watson Valve – Watson Valve Services specializes in the custom design, repair and modification of severe service metal seated ball valves. Watson’s severe service ball valves are unique because of the proven coatings technology of sister company, Watson Grinding & Manufacturing, on the internal components (ball, seat, stem, etc.) of the valve. Watson Valve’s products have been proven in Autoclave Operations, Mining and Chemical plants world-wide. ISO 9001:2008.
About Barrick Technology Centre: Barrick operates the Barrick Technology Centre in Vancouver as a center of excellence for metallurgy and process development. The Centre has more than 40 permanent employees working in a recently modernized facility with new equipment. Its testing and analysis capabilities play an important role in innovation efforts and company initiatives worldwide to enhance recovery, decrease operating costs, and generally improve operations. (Source: www.barrick.com).