HDU 427/-filters are multi-stay, offline fine filters with four stays (stacks) of filter inserts fitted inside one single filter housing.

Available with or without integral pump and used for marine diesel engine lube oil filtration and in certain quench oil systems. Pump capacities from 2 to 6 litres/minute.
The HDU 427/- units are available in sizes 427/54, 427/81 and 427/108, using four stacks of each 2, 3 or 4 CJC™ Filter Elements of type A 27/27 according to system oil volume.

The quench oil filter removes:
- Dust, metal particles, rust.
- Ingressed Water
- Oxidation Deposits & Cracking Deposits (resins)