Maximum engine efficiency for on- and off-highway applications.
The requirements for fuel purity to operate modern diesel engines are constantly increasing.
Hengst Filtration stays on top of the latest trends in engine technology and has developed a modular system for fuel filtration. It consists of basic variants available as standard and can be customized by five innovative add-ons.
Blue.maxx is a fuel filter system that is characterized in particular by very effective water separation and can be optimally adapted to any application.
Overview
Hengst Filtration offers three different Blue.maxx basic sizes for a wide range of volume flow rates.

Features
Blue.maxx 200 | Blue.maxx 300 | Blue.maxx 450 | |||||
Pre-filter | Main-filter | Pre-filter | Main-filter | Pre-filter | Main-filter | ||
Filter housing geometry data | |||||||
Height h [mm] | 266 | 266 | 282 | 282 | 367 | 319 | |
Width w [mm] | 96 | 96 | 119 | 119 | 119 | 119 | |
Depth d [mm] | 104 | 104 | 148 | 140 | 148 | 140 | |
Connecting thread [mm] | M16x1,5 (5x) | M16x1,5 (5x) | M16x1,5 (4x) | M16x1,5 (4x) | M16x1,5 (4x) | M16x1,5 (4x) | |
Mechanical data | |||||||
Volumen rate (nominal) | 200 [I/h] | 200 [I/h] | 300 [I/h] | 300 [I/h] | 450 [I/h] | 450 [I/h] | |
Temperature | From -30 to 120 °C | From -30 to 120 °C | From -30 to 120 °C | From -30 to 120 °C | From -30 to 120 °C | From -30 to 120 °C | |
Working pressure suction side | -0,3 … 4 [bar] | -0,3 … 15 [bar] | -0,3 … 4 [bar] | -0,3 … 15 [bar] | -0,3 … 4 [bar] | -0,3 … 15 [bar] | |
Filtration data | |||||||
Initial Efficiency acc. to ISO 19438 | 97 % (@ 10 μm) | 97 % (@ 4 μm) | 97 % (@ 10 μm) | 97 % (@ 4 μm) | 97 % (@ 10 μm) | 97 % (@ 4 μm) | |
Dust holding capacity (nominal) ISO 19438 | 30 g (dp = 30kPa) | 55 g (dp = 80kPa) | 40 g (dp = 30kPa) | 70 g (dp = 80kPa) | 69 g (dp = 30kPa) | 105 g (dp = 80kPa) | |
Water separation efficiency acc. to ISO 16332 (60 μm @ 0,15 %) | 99 % | - | 99 % | - | 99 % | - |
Optionally, the systems (300, 450) are also available with a heater (incl. wiring kit). Systems 200, 300 and 450 are upgradable with the following kits: water-in-fuel sensor (with wiring kit), hose connection kit, thread adapter kit and antarctic version from -40 °C to 120 °C.
Add-Ons
The basic variants can be customized by different add-ons to meet the customer's individual requirements.
- Pumps
- Heaters
- WIF sensors
- Connectors
- Filter elements
Multi-stage water separation
High and robust water separation performance by adjustable filtration-, coalescing- and draining-stage design
Compensating ageing and high water impact over whole filter element lifetime
Accumulation of water inside the filter element and drainage to water bowl through bottom
Advantages

Blue.maxx – the most important advantages at a glance:
- High degree of customization - available at short notice
- Leading quality standards in filtration - directly visible compared to conventional Spin-on filters
- High degree of water separation over lifetime - guaranteed through innovative filter design
- Patent-protected filter elements guarantee high functional reliability & the aftermarket business