WLD1900 Float Type Liquid Drainers

WLD1900-Series Liquid Drainers feature:

  • Cast Iron Bodies
  • Parallel Pipe Connection
  • 250 psig Operating Pressures
  • All Stainless Steel Internals

Used for draining liquids from Tanks, Vessels, and piping systems containing pressurized Air or other gases.

WLD1900 – Catalog Spec Sheet (pdf)
WLD1900 – I&M (pdf)


The WLD1900 float type liquid drainers contain a float-operated valve. When liquid enters the drainer, the float rises opening the valve which allows liquid to be drained.

Determine the capacity (lbs/hr) required at the specified differential pressure. Locate differential pressure on capacity chart; move down column to capacity required. Make sure to select the correct model based on the maximum inlet pressure.

Capacity in lbs/hr is based on differential pressure across the drainer. Select a model with an equal or higher PMO (max. operating pressure) than the maximum inlet pressure to the drainer. If the pressure to the drainer exceeds the PMO, the drainer may not open. If discharging to atmosphere, the differential pressure is equal to the inlet pressure.

Required to drain 3,000 lbs/hr at a differential pressure of 5 PSI. The maximum inlet pressure is 30 PSIG.Select Model:
WLD1916-030, 11/2”, capacity up to 4,710 lbs/hr based on 5 PSI differential pressure.