Gauge pressure looks fine but tools lack power or stall under load.
1
Undersized hose or piping for the flow required
CheckCompare hose/pipe ID and length to required CFM using a pressure-drop chart.
FixUpsize hose/piping; minimize length and fittings.
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2
Excessive pressure drop across filters/regulators/dryers
CheckMeasure ΔP across each FRL, filter, and dryer at full flow; typical clean-filter ΔP is only 1–3 psi, rising with loading.
FixReplace loaded elements; verify components are sized for actual flow.
ToolsDifferential pressure gauge
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3
Quick-connect couplers restrictive or worn
CheckCompare coupler flow rating to tool requirement; inspect for wear.
FixUse industrial-flow couplers matched to hose ID.
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4
Kinked or damaged hose
CheckVisual inspection along full length under pressure.
FixReplace hose.
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5
Total connected demand exceeds compressor capacity
CheckSum rated CFM of tools in simultaneous use vs compressor nameplate CFM.
FixAdd capacity, stage tool usage, or add adequate storage receiver.
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Safety
Lockout/tagout before opening enclosures. Verify zero energy. Bleed system pressure before opening any pneumatic connection.