Carrier 42C Series Product Data page 18

Application data (cont)
SYMBOL/SKETCH
LEGEND
Cv — Coefficient of Velocity
DX — Direct Expansion
18
PIPING COMPONENTS (cont)
DESCRIPTION
STRAINER: Y-type body with 50 mesh stain-
less steel screen.
Application — Used for removal of small parti-
cles from system water during normal system
operation. Should not be used in lieu of main
system strainers. Strainer screen may have to
be removed during initial high pressure sys-
tem flushing during start-up. Screen should be
removed and cleaned per normal mainte-
nance schedule (provisions for strainer blow-
down not provided).
GATE VALVE: Manual shut-off valve.
Application — Used for unit isolation during
system flushing, servicing, etc. Do not use for
water balancing.
GLOBE VALVE: Standard pattern, manual
shut-off and throttling valve.
Application — Used for unit isolation. Not rec-
ommended for high flow rates due to relatively
high pressure drop.
COMPRESSION STOP VALVE:
Manual shut-off valve.
Application — Used for unit isolation during
system flushing, servicing, etc. Not recom-
mended for high flow rates due to relatively
high pressure drop.
BALL VALVE: Manual balance and shut-off
valve.
Application — Used for unit isolation and
water flow balancing. Without memory stop
feature water balance point must be marked
by installer (if necessary). Check specifica-
tions for service fittings required when used
for water balancing.
BALL VALVE WITH MEMORY STOP:
Manual balance and shut-off valve.
Application — Used for unit isolation and
water flow balancing. The adjustable memory
stop feature allows return to the balance point
after shut-off. Check specifications for
service fittings required when used for water
balancing.
C FACTOR RATING
V
1 / 3 / PSI
2 4
9.0 19.0
400
Clean Clean
19.8 36.0 200
1.8 3.9 200
2.3 5.4 150
4.0 7.5 400
4.0 7.5 400
STEAM
USE
F
250 N/A
200 NO
200 NO
200 NO
200 YES
200 N/A