Sandpiper F15 Service & Operating Manual Download Page 11

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f15mdl1sm-rev0219

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Model F15 Metallic •

Recommended Installation Guide

Troubleshooting Guide

For additional troubleshooting tips contact After Sales Support at [email protected] or 419-524-8388

Symptom:

Potential Cause(s):

Recommendation(s):

Pump Cycles Once

Deadhead (system pressure meets or exceeds air

supply pressure) .

Increase the inlet air pressure to the pump. Pump is designed for 1:1 pressure ratio at zero flow.

(Does not apply to high pressure 2:1 units) .

Air valve or intermediate gaskets installed incorrectly . Install gaskets with holes properly aligned .
Bent or missing actuator plunger .

Remove pilot valve and inspect actuator plungers .

Pump Will Not Operate

/ Cycle

Pump is over lubricated .

Set lubricator on lowest possible setting or remove . Units are designed for lube free operation .

Lack of air (line size, PSI, CFM) .

Check the air line size and length, compressor capacity (HP vs . CFM required) .

Check air distribution system .

Disassemble and inspect main air distribution valve, pilot valve and pilot valve actuators .

Discharge line is blocked or clogged manifolds .

Check for inadvertently closed discharge line valves . Clean discharge manifolds/piping .

Deadhead (system pressure meets or exceeds air

supply pressure) .

Increase the inlet air pressure to the pump. Pump is designed for 1:1 pressure ratio at zero flow.

(Does not apply to high pressure 2:1 units) .

Blocked air exhaust muffler.

Remove muffler screen, clean or de-ice, and re-install.

Pumped fluid in air exhaust muffler.

Disassemble pump chambers . Inspect for diaphragm rupture or loose diaphragm plate assembly .

Pump chamber is blocked .

Disassemble and inspect wetted chambers. Remove or flush any obstructions.

Pump Cycles and Will

Not Prime or No Flow

Cavitation on suction side .

Check suction condition (move pump closer to product) .

Check valve obstructed . Valve ball(s) not seating

properly or sticking .

Disassemble the wet end of the pump and manually dislodge obstruction in the check valve pocket .

Clean out around valve ball cage and valve seat area . Replace valve ball or valve seat if damaged .

Use heavier valve ball material .

Valve ball(s) missing (pushed into chamber or

manifold) .

Worn valve ball or valve seat. Worn fingers in valve ball cage (replace part). Check Chemical

Resistance Guide for compatibility .

Valve ball(s) / seat(s) damaged or attacked by product . Check Chemical Resistance Guide for compatibility .
Check valve and/or seat is worn or needs adjusting .

Inspect check valves and seats for wear and proper setting . Replace if necessary .

Suction line is blocked .

Remove or flush obstruction. Check and clear all suction screens or strainers.

Excessive suction lift .

For lifts exceeding 20’ of liquid, filling the chambers with liquid will prime the pump in most cases.

Suction side air leakage or air in product .

Visually inspect all suction-side gaskets and pipe connections .

Pumped fluid in air exhaust muffler.

Disassemble pump chambers . Inspect for diaphragm rupture or loose diaphragm plate assembly .

Pump Cycles Running

Sluggish / Stalling,

Flow Unsatisfactory

Over lubrication .

Set lubricator on lowest possible setting or remove . Units are designed for lube free operation .

Icing .

Remove muffler screen, de-ice, and re-install. Install a point of use air drier.

Clogged manifolds .

Clean manifolds to allow proper air flow.

Deadhead (system pressure meets or exceeds air

supply pressure) .

Increase the inlet air pressure to the pump. Pump is designed for 1:1 pressure ratio at zero flow.

(Does not apply to high pressure 2:1 units) .

Cavitation on suction side .

Check suction (move pump closer to product) .

Lack of air (line size, PSI, CFM) .

Check the air line size, length, compressor capacity .

Excessive suction lift .

For lifts exceeding 20’ of liquid, filling the chambers with liquid will prime the pump in most cases.

Air supply pressure or volume exceeds system hd .

Decrease inlet air (press. and vol.) to the pump. Pump is cavitating the fluid by fast cycling.

Undersized suction line .

Meet or exceed pump connections .

Restrictive or undersized air line .

Install a larger air line and connection .

Suction side air leakage or air in product .

Visually inspect all suction-side gaskets and pipe connections .

Suction line is blocked .

Remove or flush obstruction. Check and clear all suction screens or strainers.

Pumped fluid in air exhaust muffler.

Disassemble pump chambers . Inspect for diaphragm rupture or loose diaphragm plate assembly .

Check valve obstructed .

Disassemble the wet end of the pump and manually dislodge obstruction in the check valve pocket .

Check valve and/or seat is worn or needs adjusting .

Inspect check valves and seats for wear and proper setting . Replace if necessary .

Entrained air or vapor lock in chamber(s) .

Purge chambers through tapped chamber vent plugs . Purging the chambers of air can be dangerous .

Product Leaking

Through Exhaust

Diaphragm failure, or diaphragm plates loose .

Replace diaphragms, check for damage and ensure diaphragm plates are tight .

Diaphragm stretched around center hole or bolt holes . Check for excessive inlet pressure or air pressure . Consult Chemical Resistance Chart for compatibility

with products, cleaners, temperature limitations and lubrication .

Premature Diaphragm

Failure

Cavitation .

Enlarge pipe diameter on suction side of pump .

Excessive flooded suction pressure.

Move pump closer to product . Raise pump/place pump on top of tank to reduce inlet pressure .

Install Back pressure device (Tech bulletin 41r) . Add accumulation tank or pulsation dampener .

Misapplication (chemical/physical incompatibility) .

Consult Chemical Resistance Chart for compatibility with products, cleaners, temperature limitations

and lubrication .

Incorrect diaphragm plates or plates on backwards,