| System 3 |
2 Way valve with primery pump |
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| Functions |
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| -Primery Circuits :flow control constant temperature |
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| -Secondary Circuits :temperature control ,constant flow |
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| -District heating systems |
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| -Large air heaters ,not subjected to freezing |
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| |
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| Balancing |
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| 1.Close V. |
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| 2-Adjust STAD-S for design flow qs |
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| 3-Open V fully |
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| 4-Adjust STAD-P for design flow qp |
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| Return to control
valve selection |
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