Sandpiper S20 Non-Metallic User Manual download pdf (Page 17)

520-202-000 9/03 Model S20 Non-Metallic Design Level 2 Page 15

RuppGUARD™ FOR VIRGIN PTFE

EQUIPPED PUMPS CONCEPT

The spill prevention option prevents

the air end components from being

contaminated or damaged when a

pumping diaphragm ruptures while

pumping caustic or toxic materials. It

also helps to protect the environment.

With the installation of optional leak

detectors (either mechanical or

electronic) the diaphragm rupture can be

detected. The pump can then be shut

down and repaired before any caustic or

toxic materials can enter the air end and

be exhausted into the surrounding

environment.

RuppGUARD™ OPTION

DIAPHRAGM SERVICING

To service the diaphragms first shut

off the suction, then shut off the

discharge lines to the pump. Next shut

off the compressed air supply, bleed the

pressure from the pump, and disconnect

the air supply line from the pump. Drain

any remaining pumped liquid from the

pump. Remove the pump before

servicing.

Next, drain the fluid from the spill

prevention chambers. This can be done

by removing the bottom plug (item 53)

from each spill prevention chamber.

After the fluid from the spill

prevention chambers has been drained,

the wet end components can now be

removed. See diaphragm servicing

section for detailed instructions. The spill

prevention option has two additional

virgin PTFE pumping diaphragms (item

48). These diaphragms are installed with

the natural concave curve toward the

outer chamber (items 17 from the pump

assembly drawing). The molded

directional arrows on the diaphragms

must point vertically.

FILLING RuppGUARD™ CHAMBERS

WITH LIQUID

THE CHAMBERS ARE FILLED

WITH WATER AT THE FACTORY.

If you prefer to substitute another

liquid, to prevent system contamination

consult the factory first to determine

compatibility of the substitute with pump

construction.

Follow the steps listed here to replace

the liquid in the pump after disassembly

or liquid loss:

1. Drain the fluid in the spill prevention

chambers by removing the bottom two

boss plugs (items 53). Replace the

bottom two boss plugs after the fluid is

drained.

2. Remove the eight capscrews (item

10) fastening the discharge manifold and

elbows to the outer chambers (items 17).

The discharge manifolds and elbows can

now be removed.

3. Remove the top two boss plugs

(items 53). The spill prevention

chambers are filled through the exposed

ports.

4. Apply air pressure to the air

distribution valve. Install safety clip (item

1-N) into the smaller unthreaded hole in

one end cap (item 1-D). This locks the

valve spool to one side, keeping the

pump from shifting.

5. Face the side of the pump with

the installed safety clip. If the safety clip

is installed in the top end cap, fill the

left spill containment chamber. If the

safety clip is installed on the bottom end

cap, fill the right spill prevention chamber.

The volume of fluid is 1420 ml (48.01 fl.

oz.). It is important that the exact amount

of fluid is used. Too little or too much

fluid causes premature diaphragm

failure and erratic pumping.

6. Loosely reinstall one boss plug

(item 53) to the filled spill prevention

chamber.

7. Shut off air supply. Remove safety

clip. Adjust the air line regulator so that

air pressure slowly fills the pump. The

diaphragm expands, forcing the fluid in

the chamber to be slowly displaced.

When the pump shifts to the opposite

side, quickly install the safety clip.

8. Loosen the top boss plug on the

filled chambers. This allows fluid in the

chamber to purge trapped air from the

chamber. This can be seen by watching

the column of fluid in the sight tube. When

fluid appears at the top of the port,

quickly tighten the boss plug. Fluid loss

of 1 to 2ml is acceptable.

9. Tilt the pump so the uppermost

pipe tee (item 56) is in the vertical

position. Loosen the pipe plug (item 52).

This will allow trapped air to purge

through the pipe tee. When fluid appears

at the tee opening, reinstall the pipe

plug.

NOTE: If all air is not purged using

this procedure, remove the check valve

components from the top port of the outer

chamber (item 17). Apply manual

pressure to the pumping diaphragm by

inserting a blunt instrument into the top

port of the outer chamber and applying

pressure to the diaphragm. Loosen the

pipe plug (item 52) allowing the fluid to

Read these instructions

completely, before in-

stallation and start-up. It

is the responsibility of

the purchaser to retain

this manual for reference. Failure to

comply with the recommendations stated

in this manual will damage the pump, and

void factory warranty.

IMPORTANT

purge any remaining trapped air.

Reinstall the plug.

10. Repeat steps 5 through 9 to fill

opposite spill prevention chamber.

11. Reinstall the check valve

components, discharge manifold and

elbows to the pump. The pump is now

ready for operation.

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Sandpiper S20 Non-Metallic User Manual Page 17

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