Flow regulating and pressure regulating valve. Ideal for oil & gas, chemical, wastewater,. Top coat eccentric hemispherical valve is suitable for sewage treatment, pulp, alumina, urban heating and heating, oil, natural gas, liquid two phases of mixed or easily chemical. However, there are certain. The structural design of the pq340 eccentric hemisphere valve is similar to a three eccentric hard seal butterfly valve, which has the advantages of easy operation, no friction during opening,.

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