PIPING COMPONENTS
SYMBOL/SKETCH | DESCRIPTION | CV FACTOR | RATING | STEAM | |||
1¤2 | 3¤4 | PSI | F | USE | |||
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| MANUAL AIR VENT: Threaded brass |
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| needle valve with screwdriver slot |
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| for adjustment. |
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| Application - Body brazed into high | N/A | N/A | 400 | 100 | NO | |
| point of heating and cooling coils for | ||||||
| bleeding air from coil. Standard item |
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| on all hydronic coils (not used on |
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| steam or DX coils). Should not be used |
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| in lieu of main system air vents. |
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| AUTOMATIC AIR VENT: Nickel |
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| plated brass valve, |
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| positive |
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| vent feature via knurled vent screw. |
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| Application - Optional replacement for |
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| manual air vent. Automatically passes |
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| minute quantities of air through the |
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| ®ber discs which expand upon contact | N/A | N/A | 125 | 240 | NO | |
| with water, completely sealing the | ||||||
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| valve. As air accumulates, the ®ber |
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| discs dry and shrink, repeating the |
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| cycle. Not recommended for removing |
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| large quantities of air encountered |
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| during initial |
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| draining and re®lling. Should not be |
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| used in lieu of main system air vents. |
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| SWAGE: Copper tube end expanded |
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| to accept a copper tube of the same |
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| size for factory or ®eld brazing. |
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| Application - Used where possible for | N/A | N/A | 300 | 200 | YES | |
| all tubing joints for best joint integrity. | (*) | (*) | ||||
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| (*) See page 30 for ratings of different |
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| joining materials and operating |
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| temperatures. |
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| UNION: Combination wrought |
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| copper/cast brass union assembly, |
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| solder by solder. |
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| Application - Used for quick connect |
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| (and disconnect) of valve package | N/A | N/A | 300 | 200 | YES | |
| components to minimize ®eld labor | (*) | (*) | ||||
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| and facilitate servicing of unit. |
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| (*) See page 30 for ratings of different |
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| joining materials and operating |
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| temperatures. |
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| INSERTION TEST PORT: Brass body |
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| valve for acceptance of test probe (up |
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| to 1¤8 in. diameter). |
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| Application - Installed on one (or both) | N/A | N/A | 250 | 250 | NO | |
| sides of the coil to allow for temperature | ||||||
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| or pressure sensing. Used for close |
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| tolerance water balancing and |
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| service analysis. |
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24
