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Pressure regulators problem.

Pressure regulators problem. One more pressure regulator was tested Zimmerli ZM-R25S sample #2057 Ageing rate is 10-15 %/100h – more or less the same as in the previous tests . 3 Bachofen and 5 Zimmerli pressure regulators have bean tested in 13 tests.

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Pressure regulators problem.

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  1. Pressure regulators problem.

  2. S.Konovalov "Pressure regulators."

  3. One more pressure regulator was tested Zimmerli ZM-R25S sample #2057 Ageing rate is 10-15 %/100h – more or less the same as in the previous tests. 3 Bachofen and 5 Zimmerli pressure regulators have bean tested in 13 tests. All tested samples of Bachofen and Zimmerli pressure regulators gave ageing. S.Konovalov "Pressure regulators."

  4. Which parts of p-regulators are responsible for the ageing? • Metal parts. • Membranes. • Other non metal parts. • Grease, lubricants… • Solvents used for cleaning. S.Konovalov "Pressure regulators."

  5. Tests of membranes. • Viton membrane for Bachofen pressure regulator – ageing 14 %/100h • Viton membrane of Zimmerli regulator type #2053 ageing 11 %/100h • Teflon parts and seat (viton) of Zimmerli regulator type #2053 No ageing after 212 hours. Viton membranes are the main sources of ageing. S.Konovalov "Pressure regulators."

  6. Which material can be used for diaphragms instead of viton? • PTFE membrane of Zimmerli pressure regulator was tested. NO ageing after 220 hours. S.Konovalov "Pressure regulators."

  7. Do we have other sources of Si except membranes? We are planning to test Zimmerli pressure regulator with teflon membrane. It is flushing since Tuesday and will start irradiation on Monday. S.Konovalov "Pressure regulators."

  8. Pressure regulator Bachofen Instrum AG LPRI sample 2049 after flushing and heating gave electronegative impurities. The concentration of electronegative impurities decreased during the test. Gas gain v.s. gas flow Sample 2049-2 No ageing with electronegative impurities S.Konovalov "Pressure regulators."

  9. Electronegative impurities removed • Ageing processes started again when concentration of electronegative impurities decreased. S.Konovalov "Pressure regulators."

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