Graf Grease Separator 4Ltr Sec with Diamant 2200Ltr Tank 700L Sludge

GRAF Diamant NS4 2200L Grease Separator

The GRAF Diamant 2200L grease separator removes fats, oils, grease and settleable food solids from commercial wastewater. This underground NS4 separator handles a nominal flow rate of 4 litres per second and incorporates a 700-litre sludge trap.

Commercial kitchens and food-preparation premises can discharge considerable amounts of fats, oils and grease, commonly known as FOG. As the wastewater cools, these substances may solidify inside drainage pipes and downstream treatment systems. Consequently, uncontrolled FOG can contribute to blockages, foul odours, pest activity and increased maintenance costs.

How does the grease separator work?

Wastewater from sinks, dishwashers and appropriate food-preparation areas enters the separator. First, the tank slows the flow. This allows heavier food particles and solids to sink into the integrated sludge trap.

Meanwhile, fats, oils and grease rise to the surface because they have a lower density than water. The separator retains the floating grease layer while the separated wastewater continues towards the sewer, septic tank or wastewater treatment system.

Therefore, the Diamant separator reduces the quantity of FOG reaching downstream drainage and treatment equipment. However, the operator must arrange regular inspections, emptying and cleaning to maintain effective separation.

Main specifications

• Manufacturer: GRAF
• Model: Diamant underground grease separator
• Nominal size: NS4
• Nominal flow rate: 4 litres per second
• Tank capacity: 2200 litres
• Sludge trap capacity: 700 litres
• Underground installation
• Integrated grease collection area
• Integrated sludge trap
• Sampling point
• Suitable for appropriate commercial wastewater applications

Typical applications

The GRAF Diamant NS4 grease separator may suit:

• Restaurants and commercial kitchens
• Cafés, takeaways and public houses
• Hotels and guest accommodation
• Schools and workplace canteens
• Nursing homes and care facilities
• Small food-processing premises
• Other businesses that discharge grease-laden wastewater

A qualified designer must confirm the correct nominal size for each project. In particular, the designer should consider the maximum wastewater flow, number of meals, operating hours, water temperature, detergents and expected grease loading.

Benefits of grease separation

Removing FOG before it reaches the downstream system helps limit grease deposits inside pipework. In addition, it protects pumps, septic tanks and biological wastewater treatment processes from excessive grease loading.

Effective separation may also help protect the percolation area from fats and grease that could contribute to clogging. Nevertheless, regular maintenance remains essential because the tank stores the collected grease and sludge.

View our complete range of grease traps and separators.

Sizing, installation and maintenance

Select and size grease separators according to the site requirements and the relevant parts of EN 1825. Furthermore, the installation must provide safe access for inspection, sampling, emptying and cleaning.

A competent contractor should assess the inlet and outlet levels, ventilation, ground conditions, access cover and desludging access before installation. The operator should then establish a maintenance schedule based on the site’s usage and the rate at which grease and sludge accumulate.

For further specifications, contact Percolation Supplies for assistance.

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Grease separator 4ltr sec with diamant 2200ltr tank 700lsludge