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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. USE WELL-LUBRICATED METAL BOLTS AND NUTS. USE SOFT RUBBER GASKETS. 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
ORIENTATION: It is recommended that these valves be installed no closer than 10 pipe diameters from a pump. At least 5 pipe diameters should be between these valves and an elbow. As in all plastic piping the maximum fluid velocity is 8 feet per second. This velocity minimizes the effects of valve closure and pump start up or shut down. Note flow direction when installing. The ball will not float. This valve can be used in an upflow line but not in a downflow line. In horizontal installations standard line drop will generally not allow ball to seat. REPAIR: 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, or the complete valve body from the piping system. The front face of the seal retainer indicates which direction of rotation tightens or loosens the seal retainer, with the word “tighten” and a directional arrow, and the word “loosen” and a directional arrow. Direction of rotation may vary depending on date of manufacture. Rotate 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. Use a non-petroleum base lubricant to lubricate the o-rings, and re-assemble the valve.
BALL (1) REQ SQUARE-CUT SEAL (1)REQ O-RING (2) REQ END CONNECTOR (2) REQ
True Union Ball Check Valves - 16511 FLOW
ASSEMBLY NUT (2) REQ BODY (1) REQ O-RING (1) REQ TCIS REV C 9/7/99 ECR 819R
