Use these adaptors to eliminate adhesion of high-abrasive material to sleeve and stacking of fine grain materials, which causes faulty valve operation. The adaptors are also useful for controlling flow of melting materials, liquid, and air.

■Installation Attach a spool to hopper flange and flow-control valve by bolts. To insert a valve in the middle of chute or duct, two spools and one adaptor sleeve are required. To install a valve at the exit of hopper or chute, one spool and one sleeve are required. The illustration on the right shows an example of using adaptor spools and adaptor sleeve with manual valve in the middle of chute.

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■Dimensions(Same for models FV and MFV)

■Dimensions Table

Unit : mm

Model Applicable float Control valve	A	B		C	D	E	F		H	Hole number
		Type A	Type S				Type A	Type S
FV/MFV-4A(S)	155※	115	101	95	140※	76	9	6	7	6
FV/MFV-6A(S)	230	166	152	146	214	76	9	6	9	6
FV/MFV-8A(S)	283	217	205	197	267	76	9	6	9	6
FV/MFV-10A(S)	345	262	250	242	325	127	9	6	11	8
FV/MFV-12A(S)	410	312	300	292	390	127	9	6	11	8

Note:	1. Type A:Aluminum, Type S:Stainless steel
	2. *MFV-4A(S):A=160, D=14
	3. Customers are requested to create a spool with above specifications.

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■Measure to create smooth flow of materials of extremely low-downward pressure on flow control valve

Use a special adaptor sleeve (with ring weight in its bottom) to control smooth opening of sleeve, when handling materials of extremely low-downward pressure, which often underperform sleeve opening.

■Measure to decrease pressure on flow control valve

Try to reduce material pressure as low as possible, in order to ensure smooth operation of flow control valve. The practice also extends sleeve life. We calculate standard material pressure on sleeve at 140g/cm2. The following illustrations show examples of measures to reduce pressure.

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