The float valve sub is a bit sub in which a float valve is installed. Its connection is ordered by user. The supplier put a float valve into the bore of sub according to specification of standard API. Mechanical property of material of sub conforms to the requirement of standard SY5200-93 and API.

Type	OD	I.D.	Length	Connection	Float Valve Type
	(mm/inch)	(mm/inch)	(mm/inch)	API
FVJ121D	121(4-3/4)	50.8(2)	915(36)	3-1/2″REG B× NC38B	2F-3R
FVJ165D	165(6-1/2)	71.4(2-13/16)	915(36)	4-1/2″REG B× NC50B	4R
FVJ203D	203.2(8)	71.4(2-13/16)	915(36)	6-5/8″REG B× 6-5/8″REGB	5F-4R
FVJ229D	228.6(9)	76.2(3)	915(36)	7-5/8″REG B×7-5/8″REGB	5F-4R
When ordering or requesting quotation, if size out of above specification, pls. specify clearly.