Carrier 42 SERIES specifications PIPING COMPONENTS cont

PIPING COMPONENTS (cont)

SYMBOL/SKETCH	DESCRIPTION	CV FACTOR		RATING		STEAM
		1¤2	3¤4	PSI	F	USE
	STRAINER: Y-type body with
	50 mesh stainless steel screen.
	Application - Used for removal of small
	particles from system water during
	normal system operation. Should not
	be used in lieu of main system	9.0	19.0	400	250	N/A
	strainers. Strainer screen may have to
		Clean	Clean
	be removed during initial high pressure
	system ¯ushing during start-up.
	Screen should be removed and cleaned
	per normal maintenance schedule
	(provisions for strainer blow-down
	not provided).
	GATE VALVE: Manual shut-off valve.
	Application - Used for unit isolation	19.8	36.0	200	200	NO
	during system ¯ushing, servicing, etc.
	Do not use for water balancing.
	GLOBE VALVE: Standard pattern,
	manual shut-off and throttling valve.
	Application - Used for unit isolation.	1.8	3.9	200	200	NO
	Not recommended for high ¯ow rates
	due to relatively high pressure drop.
	COMPRESSION STOP VALVE:
	Manual shut-off valve.
	Application - Used for unit isolation	2.3	5.4	150	200	NO
	during system ¯ushing, servicing, etc.
	Not recommended for high ¯ow rates
	due to relatively high pressure drop.
	BALL VALVE: Manual balance and
	shut-off valve.
	Application - Used for unit isolation
	and water ¯ow balancing. Without	4.0	7.5	400	200	YES
	memory stop feature water balance
	point must be marked by installer (if
	necessary). Check speci®cations for
	service ®ttings required when used for
	water balancing.
	BALL VALVE WITH MEMORY STOP:
	Manual balance and shut-off valve.
	Application - Used for unit isolation
	and water ¯ow balancing. The adjust-	4.0	7.5	400	200	N/A
	able memory stop feature allows return
	to the balance point after shut-off.
	Check speci®cations for service
	®ttings required when used for
	water balancing.

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