Field Instruments

General

With OPTIMA Compact you get a dynamic flow and temperature control valve for heating and cooling systems

OPTIMA Compact combines the functions of an externally adjustable dynamic balancing valve, a differential pressure control valve and a full authority modulating control valve in one single, compact valve housing.

The OPTIMA Compact provides modulating control with full authority regardless of variations in the differential pressure of the system making it possible to achieve 100% control of the water flow in the building.

In addition, the correct application of the OPTIMA Compact can significantly reduce pump energy consumption and improve the efficiency of other hydronic system components. It also provides optimal comfort for end users due to high precision temperature control.

The valve operates by adjusting automatically to the pre-set flow under fluctuating pressure conditions whilst also providing full modulating control. To achieve the design flow rate, the simple pre-setting scale on top of the valve is rotated to the required set point, which can be determined by using the Frese flow tables or the Frese Valves app.

OPTIMA Compact is also available in a Veriflow-series. This has an additional P/T plug which allows for both flow measurement and verification of minimum differential pressure across the valve. This is the first pressure independent control valve (PICV) on the market to integrate both functionalities in the original valve housing without add-ons and additional space requirements.

Features

• The presetting function has no impact on the stroke; Full stroke modulation at all times, regardless the preset flow
• Regulation characteristic remains unchanged regardless of preset flow
• The constant differential pressure across the modulating control component guarantees 100% authority
• Automatic balancing eliminates overflows, regardless of fluctuating pressure conditions in the system
• Motoric actuator 0-10 V and 3 point control
• Differential pressure operating range up to 800 kPa
• High flows with minimal required differential pressure due to advanced design of the valve
• Small dimensions due to compact housing
• Higher presetting precision due to stepless analogue scale
• Rangeabililty > 100:1

Specifications

• Make : Frese
• Model: 53-1237-02
• Size: DN250
• DP controller: Stainless steel
• Spring: Stainless steel
• Diaphragm: Reinforced EPDM
• O-rings: EPDM
• Pressure class: PN25
• Stroke 48 mm
• Flange connections: ISO 7005-2 / EN 1092-2
• Max. differential pressure: 800 kPa
• Needles for DP measurement: Max diameter, ø3.2 mm
•  Length, 25 - 40 mm

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