Controlling the flow of backwash water in filtration equipments

Case Study – Filtration Equipment

Background

In many filtration systems, the primary pump regulates service water flow under normal operation. However, during the backwash phase, there is no back-pressure, meaning the backwash water flow is no longer controlled by the primary pump.

This creates a challenge: ensuring a consistent, controlled flow of backwash water through increasingly clogged filters, without overloading or damaging the system. Since backwashing is done with water only, it depends entirely on a pre-determined flow rate to be both effective and water-efficient. An uncontrolled flow risks damaging the filters and wasting large volumes of water.

Solution

By installing BT-Maric Threaded Flow Control Valves into the system, a constant, pre-set backwash flow rate is maintained—regardless of pressure variations that occur as filters become less clogged during the cleaning cycle.

This ensures that filters are rinsed gently but effectively, protects system components, and reduces unnecessary water consumption—making the backwash process safer, more predictable, and more efficient.

Key Benefits of BT-Maric Flow Control Valves

1. Simple to install and highly reliable

Compact, mechanical design makes installation quick and easy, with long-term dependable performance.

2. Economical and tamper-proof

The valve’s pre-set flow rate cannot be adjusted, ensuring consistent operation and eliminating the risk of misuse. Its maintenance-free design reduces lifetime costs.

3. Long service life

Built for durability, each valve offers a life expectancy of up to 20 years, even in demanding environments.

4. 100% mechanical – no external power required

Operates without electricity or control systems, simplifying integration and increasing reliability.

5. Stable flow despite pressure variations

Delivers a constant, pre-set flow rate regardless of upstream or system pressure fluctuations.

6. Supports water conservation

By preventing overuse and ensuring precise delivery, BT-Maric valves help save the planet’s most valuable resource—water.

Facing Challenges in Backwash Flow Control?

• How do you currently control the backwash water flow rate in your filtration systems?

• Have you experienced issues with backwash water management in centrifugal separators—such as inconsistent flow, water waste, or system stress?

If so, it may be time to consider a constant flow solution that ensures predictable, efficient backwash performance—regardless of pressure fluctuations.