Logo Oventrop GmbH & Co. KG

Cocon QTZ Pressure independent control valve with external thread PN 25
DN 25, G 1 ¼, 400-2500 l/h, without measuring valves, DZR brass


Pressure independent control valve for dynamic hydronic balancing of heat exchangers, for example fan coils or cooling ceilings and distribution pipes in heating and cooling systems with closed circuits. The valve combination consists of an automatically operating flow controller and a control valve and can be equipped with an actuator or a manual regulating head.
Two-way valve, with secured, lead sealable, infinitely adjustable flow limitation. Direct setting in litres per hour. Readability of the set value possible from the outside, independent of the handwheel position, even with the actuator mounted. Valves with blind plugs can be retrofitted with Classic measuring valves. All DN 15 and DN 20 valves with internal thread are suitable for copper pipe with compression fittings. 
Valve body and wetted parts made of dezincification resistant brass, plastic, stainless steel, EPDM or PTFE. Maintenance-free spindle sealing.
Cocon QTZ are characterized by easy adjustability, compact dimensions and best control quality.



  • Main function: Pressure independent control valve
  • Medium: Water, Water-glycol mixture
  • Pressure rating: PN 25
  • Nominal size: DN 25
  • Connections: External thread
  • Connection size: G 1 ¼
  • Control range: 400 - 2,500 l/h
  • Differential pressure p1-p3: 20 - 600 kPa
  • Kvs: 4.1
  • Operating temperature: -10 - 120 °C
  • Max. differential pressure: 6 bar
  • Presetting: Yes
  • Presetting blockable: Yes, lead sealable
  • Presetting indicator: Yes
  • Shutoff: Yes
  • Measuring connection: Closed with blind plug
  • Body material: DZR brass
  • Type: Two-way
  • Connection actuator: M 30 x 1.5
  • Control stroke: 4 mm
  • Installation location: Supply or return
  • Insulation shell: Available as accessory
Art.-Nr.: 1143668
EAN: 4026755421842
Manufacturer: Oventrop GmbH & Co. KG
Subject to technical changes

Actuators

Dimensions

Dimensions of article

Length Width Height Weight
115 mm 110 mm 75 mm 1,23 kg

Packing units

Type Qty. Length Width Height Weight
Carton 1 125 mm 140 mm 96 mm 1,31 kg
Carton 10 390 mm 295 mm 212 mm 13,71 kg
Europallet 400 1200 mm 800 mm 1215 mm 571,56 kg

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ETIM

Klassifizierung
ETIM 7.0
Property Value
Height 61.8 mm
Material quality Dezincification resistant brass (DZR)
Suitable for glycol
Volume flow 0.4 - 2.5
Suitable for liquids
Suitable for gases
Article compression class PN 25
Max. medium temperature (continuous) 120 °C
Min. medium temperature (continuous) -10 °C
Suitable for steam
Housing material Brass
Nominal inner diameter DN 25