Dust filters are installed within housings at the pump inlet to protect the pump against ingested small particles and dust. This FH-25 housing encases a element media dust filter (not included PN 140117S on this website) used to filter 98% of particles larger than 5 microns from inlet gases for Trivac D 16/25 B pumps. Note that installing a dust filter in the intake line of the pump throttles its pumping speed at lower intake pressures much more than at higher intake pressures . Rugged steel construction with baked enamel finish.

Inlet Vacuum Filter Housing DN KF-25 Inlet and Outlet Flanges:
Fits Pump Models: Leybold Trivac D16B, D25B
Inside Filter Element Media: Leybold P/N 140117S
Weight: 2.5 lbs