Carrier 42 SERIES Application Data page 25

SYMBOL/SKETCH
B + G
HAYES
DESCRIPTION
PRESSURE TEST PORT: Brass body
⁄ service access fitting with
1
4
removable depressor type core.
Application - Installed on both sides of
the coil to allow for pressure sensing.
Attach pressure gages to facilitate
close tolerance water balancing.
GAGE COCK: Brass shut-off valve
with 1 ⁄ FPT fitting for attachment of
4
pressure gages.
Application - Installed on both sides of
the coil to allow for pressure sensing.
Attach pressure gages to facilitate
close tolerance water balancing. May
be used in bleed bypass line to
regulate water flow.
CIRCUIT SETTER: Variable water
flow balancing valve with manual
adjustment knob, pointer, percent-open
scale, memory stop and integral
pressure read-out ports.
Application - Used for close tolerance
water flow balancing. Positive shut-off
ball valve feature allows usage as com-
bination balancing and shut-off valve.
BALANCE VALVE: Variable water
flow manual balancing valve with
screwdriver slot adjustment screw.
Application - Often used in conjunction
with test port fittings for water flow
balancing. Balance by temperature
differential or coil pressure drop (check
specifications for service fittings
required if balancing by pressure drop).
May be used in 3-way valve bypass
line to permit equal flow balancing.
FLOW SETTER: Variable water flow
manual balancing valve with
screwdriver slot adjustment and direct
gpm read-out sight glass.
Application - Used for water flow
balancing (8.0 gpm maximum).
FIXED FLOW VALVE: Spring and
insert type (non-adjustable).
Application - Used for water flow
balancing. Valve automatically adjusts
the flow to within 10% of set point. Not
available for flow rates above 8 gpm.
FIXED FLOW VALVE: Flexible orifice
type (non-adjustable).
Application - Used for water flow
balancing. Valve automatically adjusts
the flow to within 10% of set point.
Requires 15 psi (35 ft) of additional
pump head for proper operation.
C V FACTOR
1 ⁄
2
N/A
N/A
1.95
3.0
2.2
Valve orifice size
determines C V
factor. The orifice
of these fixed flow
valves changes as
flow is regulated.
As the water
pressure increases,
the orifice size
decreases, thereby
automatically
limiting the flow
rate to the
specified gpm
(+/ 10%).
25
RATING
STEAM
3 ⁄ PSI F
4
N/A 400 210
N/A 200 250
4.15 200 250
8.9 150 200
5.4 125 210
125 240
150 160
USE
NO
N/A
NO
NO
NO
NO
NO