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Balancing valves, and in particular VOMBVs, provide the tools to diagnose a multitude of hydronic system anomalies: 1. Close the VOMBV; the pressure drop you read across the valve is the ...

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(49) ASTM D4057-81, 95, Standard Practice for Manual Sampling of Petroleum and Petroleum Products, IBR approved for Appendix A: Method 19, Section 12.5.2.2.3. (50) ASTM D4084-82, 94, Standard Method ...