Table 5 — Piping Components

SYMBOL/SKETCH

DESCRIPTION

CV FACTOR

RATING*

STEAM

1/ in.

3/

4

in.

PSI

F

USE

 

 

2

 

 

 

 

 

 

MANUAL AIR VENT: Threaded brass needle

 

 

 

 

 

 

 

 

valve with screwdriver slot for adjustment.

 

 

 

 

 

 

 

 

Application — Body brazed into high point of

N/A

N/A

400

100

NO

 

heating and cooling coils for bleeding air from

 

coil. Standard item on all hydronic coils (not

 

 

 

 

 

 

 

 

used on steam or DX coils). Should not be

 

 

 

 

 

 

 

 

used in lieu of main system air vents.

 

 

 

 

 

 

 

 

AUTOMATIC AIR VENT: Nickel plated brass

 

 

 

 

 

 

 

 

valve, fiber-disc type, with positive shut-off ball-

 

 

 

 

 

 

 

 

check and quick vent feature via knurled vent

 

 

 

 

 

 

 

 

screw.

 

 

 

 

 

 

 

 

Application — Optional replacement for man-

 

 

 

 

 

 

 

 

ual air vent. Automatically passes minute

 

 

 

 

 

 

 

 

quantities of air through the fiber discs which

N/A

N/A

125

240

NO

 

expand upon contact with water, completely

 

 

 

 

 

 

 

 

 

sealing the valve. As air accumulates, the fiber

 

 

 

 

 

 

 

 

discs dry and shrink, repeating the cycle. Not

 

 

 

 

 

 

 

 

recommended for removing large quantities of

 

 

 

 

 

 

 

 

air encountered during initial start-up or subse-

 

 

 

 

 

 

 

 

quent draining and refilling. Should not be

 

 

 

 

 

 

 

 

used in lieu of main system air vents.

 

 

 

 

 

 

 

 

SWAGE: Copper tube end expanded to accept

 

 

 

 

 

 

 

 

a copper tube of the same size for factory or

 

 

 

 

 

 

 

 

field brazing.

N/A

N/A

300

200

YES

 

Application — Used where possible for all tub-

 

 

 

 

 

 

 

 

ing joints for best joint integrity.

 

 

 

 

 

 

 

 

UNION: Combination wrought copper/cast

 

 

 

 

 

 

 

 

brass union assembly, solder by solder.

 

 

 

 

 

 

 

 

Application — Used for quick connect (and dis-

N/A

N/A

300

200

YES

 

connect) of valve package components to min-

 

 

 

 

 

 

 

 

imize field labor and facilitate servicing of unit.

 

 

 

 

 

 

 

 

INSERTION TEST PORT: Brass body valve

 

 

 

 

 

 

 

 

for acceptance of test probe (up to 1/ in.

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

diameter).

 

 

 

 

 

 

 

 

Application — Installed on one (or both) sides

N/A

N/A

250

250

NO

 

of the coil to allow for temperature or pressure

 

 

 

 

 

 

 

 

sensing. Used for close tolerance water bal-

 

 

 

 

 

 

 

 

ancing and service analysis.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

Cv — Coefficient of Velocity

DX — Direct Expansion

*Check all system component pressure ratings (coils, values, pumps, etc.) with manufacturer and any applicable local or national piping codes prior to specifying system pressure rating.

NOTES:

1.Motorized 2-way valves have a maximum close-off differential of 25 psi.

2.Motorized 3-way valves have a maximum close-off differential of 10 psi.

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Carrier 42D, 42C, 42S, 42V specifications Piping Components

42V, 42D, 42S, 42C specifications

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