FLO-PLUG® Tank floor protection valve

FLO-PLUG^® 2 was engineered and patented by NORHAM in 2007 to provide a professional solution for preventing the mechanical damage caused to the bottoms of tanks when groundwater and gas rises particularly when the tank is empty.

With no moving parts, the tank floor protection device, FLO-PLUG^® 2 is comprised of:

• A “hat-shaped” body, with holes drilled all over its periphery, made from PP Homopolymer, with a UV-resistant coating.
• and an EPDM membrane that covers it.

Thanks to the materials chosen for its manufacture, the FLO-PLUG^® 2 device is highly resistant to:

• pressure,
• corrosion,
• mechanical stress,
• UV light,
• sewage,
• and withstands temperatures ranging from -40°C to + 90°C.

FLO-PLUG^® 2 offers a feed-through flow rate of 5,000 l/h (for concrete basins/tanks - 4000l/h for geomembrane basins) for a pressure loss (groundwater pressure or gas pressure needed for opening the valve) of 60 mbar (60 mm head).

The FLO-PLUG^® 2 tank floor valve is ideal for holding tanks.

It can be set up on:

• concrete structures,
• geomembrane tanks
• or on other water storage facilities (reservoirs, vats ...).

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For a geomembrane application, it is necessary to ballast the tank floor.

Make sure to have backfill materials and a spacer in this case (provided by us on request).

Contrary to the traditional free-standing tank floor valves, FLO-PLUG^® 2 is

• extremely space-saving,
• lightweight (only 1.5 kg),
• and easy to set up!

A stand-alone safety element, once installed, it requires very little servicing.

The fastenings provided with the FLO-PLUG^® 2 tank valves are made from grade 1.4401 (316) stainless steel for a better durability over time.

Hard floors (e.g.: concrete tank).

The setting up of FLO-PLUG® 2 tank floor valves onto a concrete slab is very simple.

1. Make sure, firstly, that the support on which the FLO-PLUG^® 2 will be installed is perfectly even, clean and smooth.
2. Also, make sure that the hole in the concrete slab is no larger than 200 mm in diameter.
3. Then place the body of the valve onto the wall, centre it and mark the fastening points found on the flange.
4. Drill at Ø 8 mm and 65 mm in depth and put the bolts into position.
5. Reposition the valve body onto the set fastenings and tighten all of the bolts evenly – Torque setting: 12 N.m

Supple floors (e.g.: watertight geomembrane water reserve).

Geomembrane also require a companion flange.

This is delivered with the FLO-PLUG^® 2 valve for geomembrane tank.

If it becomes necessary to ballast the geomembrane with the backfill material (or equivalent), a spacer between the geomembrane and the Flo-Plug™ must be installed (ask us).