Innovation provider



The Danish Technological Institute
Consultant René Gron
Tel. +45 7220 2937


The innovative design of Frese OPTIMA introduces an intelligent control valve that adjusts automatically to the preset flow in order to provide full modulating control. When the installer presets the valve according to the maximum designed flow, the stroke of the control valve remains the same thus providing 100% modulating control. In practical terms, Frese OPTIMA ensures that there is no overflow and that below the design flow the actuator has absolute authority. Furthermore, Frese OPTIMA combines all those features that are necessary to ease the work of designers and installers:
·  The wide (up to 400kPa) differential pressure range meets the requirements of most applications
· The compact design and the user-friendly presetting unit guarantee easy installation and commissioning.


Frese OPTIMA provides modulating control with full authority regard- less of any fluctuations in the differential pressure of the system.
Combines an externally adjustable automatic balancing valve, a differential pressure control valve and a full authority modulating control valve.
Makes it simple to achieve 100% control of the water flow in the building, while creating high comfort and energy savings at the same time.
An additional benefit is that no balancing is required if further stages are added to the system, or if the dimensioned capacity is changed.
· The presetting function has no impact on the stroke; Full stroke modulation at all times, regardless of the preset flow.
· The constant differential pressure across the modulating control component guarantees 100% authority.
· Dynamic balancing eliminates overflows, regardless of fluctuating pressure conditions in the system.
· Thermal actuator On/Off or 0-10 V, normally closed · Electric mechanical actuator 0-10 V and 3 point control, normally closed
· Differential pressure operating range up to 400 kPa
· High flows with minimal required differential pressure due to advanced design of the valve
· Higher presetting precision due to step less analogue scale.

Innovative aspects (ecologic, social and economic)

Frese OPTIMA can save up to 75% of the pump energy in the systems and make the heating and cooling devices work more efficient.
As 20% of all electricity in the world is use for pumps Frese OPTIMA can make very big savings to the environment.
If the valve were used in all HVAC systems throughout the world, 10% of all Coal fired power plants could be closed.

Installation and commissioning costs will typically be reduced by 30 – 50%

Application examples



Current stage of development

Already on the market
Exported to other countries 

Intellectual Property Rights

Patent applied for

Country of origin


Country of application




National Contact Point

René Grøn
Teknologisk Institut (DTI), Center for Produktion
2630 Taastrup
Tel: +45 7220 2937