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link 15.06.2009 12:02 |
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Subject: full area ports 9.2.2.6 Ball ValvesAll ball valves shall have full area ports, Teflon seats and seals, and chrome plated carbon steel or stainless steel balls. The valves shall not require lubrication. The use of these valves shall be in accordance with the pressure-temperature ratings specified by the manufacturer. 9.2.2.6 Шаровые краны |
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link 15.06.2009 13:13 |
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видно тоже самое, что и full port вопрос снимается |
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