Disassembly

Unscrew and Remove the Filter Retainer, Filter Screen and Top and Bottom Platens, being careful not to lose the Check Balls. Remove the Pump Body.

Remove the Top and Bottom Retainers, then remove the Centre Rod from the Bladder Sleeve by pushing one end of the Centre Rod onto a solid surface, while gripping the Bladder Sleeve. It may be necessary to use one of the Retainers to push the Centre Rod out.

Remove the Bladder from the Bladder Sleeve using a pair of needle nose pliers.

Decontamination

Completely disassemble the pump.

Wash all pump components with phosphate-free soap or a detergent.

Rinse all components thoroughly with deionized water.

Replace any worn O-rings and reassemble.

Reassembly

Manually slide the new Bladder into the Bladder Sleeve. It should extend about 1/4" beyond the Bladder Sleeve at both ends.

Using your finger, slightly flare both ends of the Bladder.

If necessary install new O-rings on both Top and Bottom Retainers and both Platens. (Total of 8.)

Hold both ends of the Replacement Bladder to minimize slip within the Sleeve. Liberally lubricate a Retainer with water, and insert it first at a 45° angle and rotate gently back and forth until the Bladder has been pushed about 1/4" past the second O-ring on the Retainer.

Insert the Centre Rod into the Sleeve until it rests in the Retainer.

Lubricate the second Retainer with water, align it onto the Centre Rod and working gently to avoid twisting or crumpling of the Bladder, push the Retainer into the Bladder until it is about 1/4" past the second O-ring.

Take the Bottom Platen and drop the 3/8" OD Teflon Check Ball into it. Do not force the ball in as the correct ball should drop in easily.

Fit the Bottom Retainer of the assembly firmly into the Bottom Platen.

Slip the Pump Body over the assembly and screw it onto the Bottom Platen. If tight, use a single wrap of Teflon Tape.

Drop a 3/8" OD Teflon Check Ball into the Top Platen and screw the Pump Body onto it.

Shake the assembled pump to hear if the Check Balls rattle. If not, repeat steps 8 to 10 to ensure that the Check Balls are positioned correctly.

Fit the Filter Screen onto the Bottom Platen and screw the Filter Retainer into place.

Note: Be careful not to lose the two pieces of the ferrule if loosening or removing the nut from the compression fitting.

® Teflon is a registered trademark of DuPont Corp.