Milton Roy GB Series, Инструкция по эксплуатации

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easily from the other liquid end parts.
2. Unscrew the ball guide (424) from the liquid end.
3. Screw the union nut part way (one or two turns) onto the end of the ball guide that has the seat in it. Be sure
the union nut is on loosely. This will allow a gap for the seat (420) to fall into as it is removed from the ball guide.
4. Set the ball guide/union nut onto a flat surface with the union nut down. Looking into the top of the ball
guide, you will see four large holes surrounding one small hole. Insert a thin, blunt instrument such as a hex
head screwdriver into the small center hole until it rests on the top of the ball (422).
5. Tap screwdriver gently with a hammer until the ball and seat are released from the ball guide.
CAUTION:
If you are disassembling unit for inspection only, be sure to use a blunt instrument and tap gently to
avoid damaging the ball. If the ball and/or seat are damaged during disassembly they will have to be
replaced. If available, to avoid damage, it is advisable to use gentle air pressure (applied at end
opposite the seat - 420) for ball and seat removal.
6. Carefully remove the two or three o-rings (depending on liquid end style) from the ball guide and seat.
7. Carefully clean any parts to be reused. If any chemicals are used in the cleaning process, ensure that
they are compatible with the process liquid.
GB GB 0080 0080 ~GB ~GB 1500 1500 Liquid End Plastic Check Valves: Reassembly Liquid End Plastic Check Valves: Reassembly
Refer to Figure 6-3 ~ 6-10
1. Fit new o-rings into position on the ball guide and seat.
NOTE:
To assure a tight, leak free seal, new o-rings should be used each time the check valves are disassembled.
2. Drop the ball into the curved inner chamber end of the ball guide.
3. Sit the ball guide on a flat surface so that the side with the ball faces upwards. Position seat on the ball
guide, trapping the ball inside. When the seat is pressed into the ball guide, the beveled edge of the seat
must be facing outward. The bevel should not face the inside of the check valve (refer to Figure 6-3 ~ 6-10).
Use a flat surface such as a board to press the seat into the ball guide with firm, even pressure.
CAUTION:
If the seat is improperly positioned, the ball will not create a tight seal and poor pumping performance will result.
4. Position the union end (445) onto the correct end of the ball guide. Refer to Figure 6-3 ~ 6-10 as the
correct end is determined by whether the valve is intended for the suction or discharge port of the liquid end.
Slip the union nut (435) over the union end and screw tightly (hand tight only) onto the ball guide.
CAUTION:
The order of Assembly of the suction and discharge check valves is different. Refer to Figure 6-3 ~ 6-10
for proper Assembly order. If check valve cartridges are installed incorrectly, one of the following will
occur: (a) immediate severe damage to pump mechanism, (b) no pumping,(c) reverse pumping action
(from discharge line into suction line).
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