Graf Grease Separator 15Ltr Sec with Diamant 3350Ltr Tank 1500L Sludge

GRAF Diamant NS15 3350L Grease Separator

The GRAF Diamant 3350L grease separator removes fats, oils, grease and settleable food solids from commercial wastewater before it enters a sewer, septic tank or wastewater treatment system. This underground NS15 separator handles a nominal flow rate of 15 litres per second and incorporates a 1500-litre sludge trap.

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

How does the grease separator work?

Wastewater from sinks, dishwashers and suitable food-preparation areas enters the separator. First, the tank reduces the speed of the incoming flow. This allows heavier food particles and solids to settle into the sludge trap.

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

Therefore, the Diamant separator helps protect sewers, septic tanks, wastewater treatment plants and percolation areas from excessive grease loading. However, the system requires regular inspection, emptying and cleaning to maintain effective separation.

Main specifications

• Manufacturer: GRAF
• Model: Diamant underground grease separator
• Nominal size: NS15
• Nominal flow rate: 15 litres per second
• Tank capacity: 3350 litres
• Sludge trap capacity: 1500 litres
• Underground installation
• Integrated grease collection area
• Integrated sludge trap
• Sampling point
• Suitable for appropriate commercial wastewater applications

Typical applications

The GRAF Diamant NS15 grease separator may suit:

• Restaurants and commercial kitchens
• Hotels and guest accommodation
• Schools, hospitals and nursing homes
• Canteens and catering facilities
• Food-processing premises
• Meat preparation and production facilities
• Other commercial premises that discharge grease-laden wastewater

A suitably qualified designer must confirm the correct nominal size for each installation. In particular, the designer should consider the maximum wastewater flow, operating hours, water temperature, detergents and the quantity of fats and solids entering the system.

Benefits of effective grease separation

Removing FOG before it reaches the downstream system can reduce grease deposits inside pipes. In addition, it helps protect pumps, septic tanks and biological wastewater treatment processes from excessive grease loading.

Effective separation may also lower the risk of grease reaching the percolation area, where it could contribute to clogging. Nevertheless, regular servicing remains essential because the separator stores the collected grease and sludge inside the tank.

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, emptying, cleaning and sampling.

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

For further technical information, contact Percolation Supplies for assistance.

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Grease separator 15ltr sec with diamant 3350ltr tank 1500lsludge