BT-Maric flow regulation valve

The BT-Maric flow regulation valves (commonly called Constant flow valves) – are engineered to deliver a precise and constant flow rate for water. Flow regulation valves keep the flow of liquid at a fixed, pre-set rate, unaffected by pressure fluctuations. These durable valves ensure that systems operate efficiently and reliably in all conditions.
Bertfelt is the leading manufacturer of BT-Maric flow regulation valves for industrial use.

New to flow regulation? See our flow regulator overview →

a full range of flow regulation valves

Precise flow regulation valves

Bertfelt supplies a full range of flow regulation valves (from 0.15 L/min to 8,854 L/min). They are designed to save water, optimize processes, and protect critical equipment.

Custom OEM solutions are also available to meet specific requirements.

Flow regulation valves Applications

Our flow regulation valves are trusted in industries such as:

  • water treatment
  • irrigation and farming
  • pump & filter protection
  • firefighting
  • marine systems
  • process and food industries
Applications
Mechanical flow regulation solution — BT-Maric flow regulator

This is how it works

Why choose a flow regulation valve?

Are you considering that…

  • You need a reliable and limited flow in your process?
  • You want a stable flow rate regardless of pressure variations?
  • Reducing water consumption is a priority for you?
  • You need to protect pumps or filters from damage?
  • You mix fluids that require precise proportions?

BT-Maric flow regulation valves provide:

  • stable and accurate flow regulation,
  • extended equipment life by reducing wear and breakdown,
  • lower investment and operating costs,
  • significant water savings in both industrial and commercial applications.

When to choose a flow regulation valve

Specify a BT-Maric flow regulation valve when:

  • Pipe size is fixed (DN6 to DN300, threaded, wafer or insert) and the flow rate must hold within ±10% of nominal under varying upstream pressure.
  • The application demands no electronics, no actuators, and no commissioning adjustments — typical of OEM equipment, water meters, irrigation manifolds, and cooling loops.
  • Tamper-proof, factory-set flow is a procurement requirement.
  • Long service life (decades in clean water) is a design criterion.

For applications outside the standard range — custom flow rates, non-standard flange specifications, or OEM integration — Bertfelt supplies tailor-made OEM solutions.

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