Maintenance & Reliability · SOP

Compressor Condensate Management System Test

Standard procedure for verifying the functional performance of automatic condensate drains, separators, and control logic on stationary industrial compressors.

Estimated Time

45 min

Difficulty

Intermediate

Regulation

CSA B52 / ASME B31.1

Version

1.0

Free download — no sign‑up, no email.Take this SOP to your shop floor and make it yours.

↓ PDF (print‑ready) ↓ Word (editable)

Purpose

The purpose of this SOP is to establish a standardized testing protocol for the condensate management system on industrial air compressors. Proper condensate removal prevents moisture accumulation in downstream piping, pneumatic tools, and processes, averting corrosion, freeze damage, and control system malfunctions.

Scope

This procedure applies to all rotary screw and reciprocating compressors in the facility equipped with automatic condensate drains (timer-based, level-sensing, or zero-loss). It covers the testing of solenoid valves, level sensors, drain intervals, and associated check valves. It does not cover manual drain valves or condensate treatment systems.

Safety Precautions

LOTOLockout/tagout compressor prime mover. Verify zero energy state. Depressurize the separator completely before accessing drains or fittings.
PPEWear safety glasses, cut-resistant gloves, and hearing protection. Condensate can be hot (>60°C) and may contain aerosolized oil.
WasteDo not discharge condensate directly to the floor. Collect in a suitable container for proper disposal or treatment per local environmental regulations.

Required Tools & Materials

Multimeter (True RMS, rated CAT III)
Adjustable wrench set (8 in to 12 in)
Condensate collection container (5-gallon capacity)
PTFE thread sealant tape
Manufacturer's manual for drain logic programming
Snoop liquid leak detector

Stop Chasing Maintenance Blindly

Track every calibration, pressure drop reading, and machine performance trend in one place. ServiceGrid logs your tasks automatically and alerts you before failure.

Try ServiceGrid →

Procedure: Step-by-Step

1 Lockout/Tagout (LOTO): Isolate compressor electrically and mechanically. Wait for unit to fully depressurize. Verify zero pressure on gauge before proceeding.

2 Visual Inspection: Inspect all mechanical float drains, solenoid-operated drains, and zero-loss drains for physical damage, corrosion, or blockages. Check wiring harnesses for chafing or loose connections.

3 Solenoid Drain Test: Activate manual override on each solenoid valve. Confirm air/water discharge occurs. Measure voltage at solenoid coil during cycle; expected rated voltage ±10% (e.g., 120VAC).

4 Timer Drain Verification: Force a drain cycle via the controller. Measure drain open time and interval using a stopwatch or logged PLC data. Compare to manufacturer spec (typically 0.5–3 s open every 15–60 min).

5 Level-Sensing Drain Test: Pour clean water into the drain reservoir. Verify the sensor triggers the drain cycle at the correct fill level. Check high-level alarm and shutdown function.

6 Check Valve & Block Valve Test: Verify the block valve in the separator flush line opens fully. Test the check valve for proper seating and backflow prevention.

7 Leak Test & Reassembly: Tighten all connections using PTFE tape. Slowly open the isolation valve. Apply Snoop leak detector to all fittings and seals. Zero leakage permitted.

8 Return to Service: Remove LOTO, re-energize unit, allow system to cycle through 3 full drain cycles. Confirm system pressure returns to operational setpoint without excessive droop.

Compressor Condensate Management System Test

Stop Chasing Maintenance Blindly

Software that works like your best tools.