BT-Maric flow limiter
– is designed to provide a consistent, limited flow rate for water.

The BT-Maric flow limiters (commonly called constant flow valves, but also often called flow regulation valves or flow control valves) keep water flow at a specified, pre-set rate, regardless of pressure changes. These robust flow limiters offer a mechanical solution for reliable water management and equipment protection.

Bertfelt is the leading manufacturer of BT-Maric flow limiters for industrial applications.

a wide range of flow limiters

Precise flow limiter valves, pipe fittings and sealing accessories in stainless steel by Bertfelt

Precise flow limiters

We supply a wide range of flow limiters, from 0.15 L/min to 8,854 L/min. These devices reduce water consumption and improve operational efficiency.

OEM-customized flow limiter solutions are also available to meet our customers challenges.

flow limiter valve installed efter a water meter

Applications of flow limiters

Our flow limiters are used in diverse sectors, including:

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

This is how it works

Many benefits when using flow limiters

Why use a flow limiter?

  • Do you need to reduce water usage at the point of consumption?
  • Want to stabilize flow despite pressure variations?
  • Need to protect pumps, filters, and distribution systems?
  • Looking for cost savings in fluid handling systems?

BT-Maric flow limiters deliver:

  • Reliable and constant flow rates under varying pressures.
  • Reduced equipment breakdown and extended lifespan.
  • Lower operating and maintenance costs.
  • Effective water conservation across applications.

How does BT-Maric constant flow valves work?

This is how it works

BT-Maric constant flow valves utilize a flexible rubber control O-ring with an orifice diameter that responds instantly to fluctuations in water pressure.

As pressure differential increases, the orifice diameter reduces to maintain the pre-set flow rate.

Likewise, as pressure reduces, the orifice opens up to maintain the pre-set flow rate.

Watch our video:

A mechanical solution to achieve constant flow.

BT-Maric O-ring at low pressure – orifice opens wider to maintain constant flow

LOW PRESSURE

The ring has a larger opening at low pressure.

BT-Maric O-ring at high pressure – orifice narrows against the conical seat to maintain constant flow

HIGH PRESSURE

At high pressure the ring is pressed against the conical body. The ring’s opening reduces and the flow remains constant.

Learn more