Automatic

Bund Dewatering

GPT are experts in the installation, maintenance and repair of all types of automatic bund dewatering devices. These pumps prevent your bunds filling with rainwater, ensuring legal compliance and preventing pollution.

What are Automatic Bund Dewatering Devices?

Effective bunding around oil tanks captures both oil and rainwater, but excess water can reduce storage capacity. Not only does this cause a potential breach of legislative requirements, but also causes the risk of oil overtopping the bund wall in the event of a tank failure.

Automatic bund dewatering devices provide a solution by continuously monitoring liquid levels in the bund, pumping out rainwater while leaving oil behind. Using advanced circuitry and micro-controller technology, these devices discriminate between oil and water to within 5mg, keeping the oil safely contained and ensuring the capacity of the containment area is not reduced by rainwater.

We can either fit the system as part of a new bund, or retrofit the system into an existing bund, including a sump installation. We can also take over the maintenance contracts for currently installed systems of all makes and models.

Key Features

  •  24/7 Monitoring: The device operates 24/7 365 days a year ensuring compliance with legal capacity requirements.
  •  Precision: The system discriminates between oil and water to within 5mg/l (5 parts per million) pumping out only the water, leaving the oil behind.
  •  Cost Savings: Reduces the need for regular waste contractor visits, lowering costs and minimizing your environmental impact.
  •  Early warning: High oil alarm allows for timely action to prevent an incident occurring causing damage to the environment.
  •  Remote site monitoring: It’s ideal for unmanned or remote sites, like electricity substations, where maintenance visits are minimized.
  •  Flexible Installation: We offer device installation within new bunds or can retrofit the system into existing bunds, including sump and pump setup.
  •  Legal Compliance: We can assist with obtaining necessary permits from the regulator should one be required, ensuring installations meet all necessary regulations.

How it works

The robust, stainless steel pump and sensor unit are housed in the sump, activating only when water levels require removal.

It then directs clean water to the appropriate discharge point (foul sewer or interceptor, depending on site circumstances).

We offer a selection of automatic bund dewatering devices. The latest version features a second pump which removes excess oil floating on the surface of the sump, so that the system is able to continue for a longer period without manual intervention.

diagram demonstrating the functionality of the bundguard device submerged in water with a control panel and flashing beacon
silver dual pump bund guard system and a diagram of the internal control panel with each probe numbered 1 to 5

Sensor unit probes

The Common Probe creates conductivity with the other probes when immersed in water.

The control unit monitors conductivity between the probes and activates the pump when the water level reaches the Start Pump (Probe 3) and switches the pump off when the water level drops below the Stop Pump (Probe 2).

If the water level rises and reaches the High Water Alarm (Probe 4) a second pump will be activated (if fitted).

The High Oil Level Float Switch Alarm (5) triggers the control panel's high oil alarm & deactivates it once the level drops below the float switch.

For sensitive site conditions only, if there is no underground interceptor tank, we recommend FilterSepta, a cost-effective above ground system that guarantees a Class 1 discharge of water from the bund to surface water adhering to BS EN 858-1:2002.

FilterSepta
Bund Surveys
Bund Repair