Carrier 42BHC, 42BVC manual Piping Components

Application data (cont)

PIPING COMPONENTS (cont)

SYMBOL/SKETCH	DESCRIPTION	CV FACTOR		RATING*
		1/2	3/4	PSI	F
	BALANCE VALVE: Variable water flow manual bal-
	ancing valve with screwdriver slot adjustment
	screw.
	Application — Often used in conjunction with test	3.0	8.9	150	200
	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.
	STRAINER: Y-type body with 50 mesh stainless
	steel screen.
	Application — Used for removal of small particles
	from system water during normal system operation.	9.0	19.0
	Should not be used in lieu of main system strain-			400	250
	ers. Strainer screen may have to be removed dur-	Clean	Clean
	ing initial high pressure system flushing during
	start-up. Screen should be removed and cleaned
	per normal maintenance schedule (provisions for
	strainer blow-down not provided).
	BALL VALVE: Manual balance and shut-off valve.
	Application — Used for unit isolation and water flow
	balancing. Without memory stop feature water bal-	4.0	7.5	400	200
	ance point must be marked by installer (if neces-
	sary). Check specifications for service fittings
	required when used for water balancing.

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.

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