Troubleshooting, Problem Cause Solution

Troubleshooting

WARNING

To reduce the risk of serious bodily injury, including skin injection, splashing in the eyes or on the skin, or injury from moving parts, always follow the Pres- sure Relief Procedure on page 5 whenever the pump is shut off, before installing, cleaning, adjust- ing, removing, or servicing the valve or any part of the system, and whenever you stop dispensing.

NOTE: Check all possible solutions in the chart below before you disassemble the regulator.

Problem	Cause	Solution

No pressure regulation	Damaged diaphragm	Replace diaphragm.
	Leaking or dirty seat	Replace cartridge, or clean seat.

No fluid flow	Damaged valve actuator	Replace valve actuator.

Pressure creeps above	Metal chip or contamination	Replace cartridge, or clean seat area.
setting	between ball and seat
	Damaged diaphragm	Replace diaphragm.
	Damaged o-ring or improper seal	Replace the o-ring under the seat.
	Damaged or clogged air regulator or	Clear obstruction in line. Service regula-
	line (air-operated regulator only)	tor if necessary.
	Leaking or dirty seat	Replace cartridge, or clean seat.
	Large change in inlet pressure	Stabilize regulator inlet pressure.

Pressure drops below	Empty/clogged supply line	Fill/flush supply line.
setting
	Damaged or clogged air regulator or	Clear obstruction in line. Service regula-
	line (air-operated regulator only)	tor if necessary.
	Using valve beyond its rated flow	Install valve for each spray gun or
	capacity	dispensing valve.
	Large change in inlet pressure	Stabilize regulator inlet pressure.

Fluid leaks from spring	Loose fluid housing	Tighten the four cap screws.
housing
	Damaged diaphragm	Replace diaphragm.

Chatter	Excessive pressure differential	Reduce pump pressure to not more than
	between pump and gun	2000 psi (14 MPa, 138 bar) greater than
		required gun pressure.
	Excessive flow rate	Reduce fluid flow through regulator.
		Connect only one spray gun or dispens-
		ing valve to each fluid regulator.

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