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FLANGED CONNECTION:

Flange bolts should be tight enough to slightly compress the gasket and make a good seal, without distorting or putting excessive stress on the flanges. Suitable washers should be used between the bolt head and flange and the nut and flange. Bolts should be tightened in alternating sequence. RECOMMENDED FLANGE BOLT TORQUE FLANGE BOLT TORQUE FLANGE BOLT TORQUE SIZE DIA. FT. LBS. SIZE DIA. FT. LBS.

1/2 1/2 10-15 2 5/8 15-25 3/4 1/2 10-15 2-1/2 5/8 20-25 1 1/2 10-15 3 5/8 20-25 1-1/4 1/2 10-15 4 5/8 20-25 1-1/2 1/2 10-15 6 3/4 30-40

NOTE: USE WELL LUBRICATED METAL BOLTS AND NUTS. USE SOFT RUBBER GASKETS.

ADJUSTMENT: EXTREME CAUTION MUST BE TAKEN WHEN WORKING ON THIS VALVE. THE PIPING SYSTEM MUST BE DEPRESSURIZED AND DRAINED. PROPER CARE MUST BE TAKEN. CONSULT M.S.D.S. (MATERIAL SAFETY DATA SHEETS) INFORMATION REGARDING YOUR SPECIFIC APPLICATION.

Remove the assembly nut and end connector from the “adjust” end of the body which is always the right port as viewed from the top with the tab up; or the complete valve body from the piping system. The direction of rotation is right hand tightens (clockwise rotation), counterclockwise loosens. The assembly nut should be installed on the valve “hand tight”. Using a strap wrench only

the joint may be tightened 1/2 to 3/4 of a turn past hand tight.

REPAIR:

Follow the adjustment sequence and information above, but rotating the seal retainer completely in the “loosen” direction and remove it from valve body. The o-rings and seals are now accessible for replacement using a “seal” repair kit. Carefully remove the o-rings from their respective locations taking care not to scratch their sealing surfaces. Insert o-rings and re-assemble. See table below.

SEAL RETAINER STEM O - RING BALL ASSEMBLY NUT SEAT SEAL RETAINER O - RING

OPERATION:

The valve flow pattern is in or out one side port and down through the bottom port. Ball pattern allows both side ports to be blocked at the same time.

Recommended valve stem torque to rotate

the ball 360

º when valve is reassembled.

VALVE TORQUE SIZE IN*LB 1/2” 40 3/4” 50 1” 60 1 1/2” 70 2” 80 3” & 2 1/2” 140 4” & 6” 170 TWIS.DOC REV A 08/12/2004 ECR 687T