Radiator Pressure Ratings
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Pressure Drop Considerations Individually piped Runtal Radiators have minimal pressure drops, usually less thon 0.5 feet of head per radiator. Medium and high pressure radiators have slightly higher pressure drops than the equivalent standard pressure model. To calculate specific pressure drop values for projects in design, contact your Runtal Sales Representative. |
| Flow Rate Considerations Flow rates with Runtal may differ from flow rates with fin-tube products by virtue of the Runtal flat tube design. Turbulent flow for good heat transfer is achieved at comparably lower flow rates with flat tubes than with round tubes. The resulting lower flow rates can provide higher delta T's, lower average water temperatures, and allow the use of smaller pumps for better system efficiency. | |
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Piping Arrangements Flow connections provided with the radiators are 1/2 " NPT standard tapered thread. Larger pipe sizes can be used, and reduced at the radiator itself. Vent connections provided are 1/8 " NPT. Standard connection patterns are recommended, but for special piping arrangements, contact your Runtal Sales Representattive.
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| Lefthand Supply shown- Righthand Supply available
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Series Piping Arrangements A same end series with Runtal produces equivalent average water temperatures in all the radiators, and in some cases can reduce the system piping required.
C and D piping arrangements are not available for column style radiators
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Radiator Expansion Runtal Radiators will expand during normal operation to a maximum of 0.16 inch per foot at 215 ° F. Proper expansion compensation should be provided in the piping, especially in series piping.
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