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Cocon QTZ Pressure independent control valve with external thread PN 25
DN 15, G ¾, 200-1300 l/h, with two mounted Classic measuring valves and mounted metering station, DZR brass

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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 15
  • Connections: External thread
  • Connection size: G 3/4
  • Control range: 200 - 1,300 l/h
  • Differential pressure p1-p3: 16 - 600 kPa
  • kvs: 2.1
  • Operating temperature: -10 - 120 °C
  • Max. differential pressure: 6 bar
  • Presetting: Yes
  • Presetting blockable: Yes, lead sealable
  • Presetting indicator: Yes
  • Shutoff: Yes
  • Measuring connection: Yes
  • Measuring valve: Classic
  • Measuring method: Differential pressure p1-p3
  • Body material: DZR brass
  • Type: Straight
  • Connection actuator: M 30 x 1.5
  • Control stroke: 2.8 mm
  • Installation location: Supply or return
  • Thermal insulation shell: Available as accessory
Art.-Nr.: 1145064
EAN: 4026755421927
Manufacturer: Oventrop GmbH & Co. KG
Subject to technical changes
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Replaces

Cocon QTZ Pressure independent control valve with external thread PN 16 DN 15, G ¾, 150 - 1050 l/h, with two mounted Classic measuring valves and mounted metering station, DZR brass
Item no. 1144764

Accessories

Spindle extension for Cocon QTZ pressure independent control valves, extension = 25 mm
Item no. 1149190
Aktor T ST Thermal actuator, 0 - 10 V control 24 V AC, normally closed, connection thread M 30 x 1,5
Item no. 1012953

Actuators

Aktor T 2P Thermal actuator, on/off control 230 V AC, normally closed, connection thread M 30 x 1.5
Item no. 1012415
Aktor T 2P Thermal actuator, on/off control 24 V AC / DC, normally closed, connection thread M 30 x 1.5
Item no. 1012416
Aktor T 2P Thermal actuator, on/off control 230 V AC, normally open, connection thread M 30 x 1.5
Item no. 1012425
Aktor T 2P Thermal actuator, on/off control 24 V AC / DC, normally open, connection thread M 30 x 1.5
Item no. 1012426
Aktor T 2P Thermal actuator, on/off control 230 V AC, normally closed with integrated auxiliary switch, connection thread M 30 x 1.5
Item no. 1012435
Aktor T 2P Thermal actuator, on/off control 24 V AC / DC, normally closed, M 30 x 1.5, cable length 2 m
Item no. 1012442
Aktor T 2P Thermal actuator, on/off control 230 V AC, normally closed, connection thread M 30 x 1.5, cable length 2 m
Item no. 1012452
Aktor T 2P Thermal actuator, on/off control 230 V AC, normally closed, connection thread M 30 x 1.5, cable length 5 m
Item no. 1012455
Aktor T 2P Thermal actuator, on/off control 230 V AC, normally closed, connection threadM 30 x 1.5, cable length 10 m
Item no. 1012459
Aktor M Motorized actuator, on/off control, with short running time (3 s) 230 V AC, connection thread M 30 x 1.5
Item no. 1012710
Aktor M Motorized actuator, on/off control, with short running time (3 s) 24 V AC / DC, connection thread M 30 x 1.5
Item no. 1012711
Aktor M ST L NC Motorized actuator, modulating with 0 - 10 V 24 V AC / DC, modulating proportional actuator, connection thread M 30 x 1.5
Item no. 1012717
Aktor M Electromotive actuator, modulating with 0 - 10 V modulating with 0 - 10 V, 24 V AC / DC, modulating proportional actuator, connection thread M 30 x 1.5
Item no. 1012725
Aktor M Motorized actuator, modulating with 0 - 10 V 24 V AC / DC, modulating proportional actuator with position feedback, connection thread M 30 x 1.5
Item no. 1012726
Aktor M Motorized actuator, on/off and floating control 230 V AC, connection thread M 30 x 1.5
Item no. 1012729
Aktor M Motorized actuator with Modbus RTU interface 24 V AC / DC, connection thread M 30 x 1.5, suitable for Cocon QTZ
Item no. 1012745
Aktor M Motorized actuator with KNX interface 21 - 32 V (from KNX bus), connection thread M 30 x 1.5
Item no. 1012746
Electrothermal actuator "Aktor T 2P" "M NC", 120 V, closed with current "off", two point, M 30 x 1,5, may only be installed in approved countries outside the EU
Item no. 1012420

Dimensions

Dimensions of article

Length Width Height Weight
135 mm 115 mm 90 mm 0,91 kg

Packing units

Type Qty. Length Width Height Weight
Carton 1 140 mm 135 mm 125 mm 1,06 kg
Unknown 10 500 mm 315 mm 280 mm 10,77 kg

BIM/CAD

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Documents

Manual

  Name Size
L_114486480.pdf
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L_114486480.pdf
Einbauanleitung
2,53 MB

Technical data

  Name Size
Cocon QTZ Technical information
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Cocon QTZ Information technique
Cocon QTZ Datenblatt
Cocon QTZ Informacion tecnica
Cocon QTZ Datablad
2,36 MB

Brochure

  Name Size
"Cocon" Pressure independent control valves/Differential pressure regulators
more languages
«Cocon» Robinets de réglage et de régulation / Régulateurs de pression différentielle
"Cocon QTZ" PN 25, "Cocon QTR/QFC" PN 15/PN 25 Válvulas de control independiente de presión
Cocon Gecombineerde (in)regelafsluiter/verschildrukregelaar
„Cocon QTZ/QTR/QFC” zawór z funkcją automatycznego równoważenia do regulacji wydajności instalacji grzewczych i chłodniczych
Комбинирани регулиращи вентили „Cocon QTZ“ PN 25 „Cocon QTR/QFC“ PN 16/PN 25
„Cocon QTZ/QTR/QFC“ Комбинированные балансировочно-регулирующие вентили
"Cocon QTZ" PN 25 "Cocon QTR/QFC" PN 16/PN 25 Valvole combinate di regolazione e controllo
Cocon QTZ/QTR/QFC" 动态平衡电动调节阀
1,82 MB
Flow, pressure and temperature balancing
more languages
Robinet de transformation à trois voies pour installation monotube verticale
Fachinformation Hydraulischer Abgleich von Heizungs- und Kühlanlagen
Equilibrado de caudal, presión y temperatura
Гидравлическая увязка Регулирование расхода, давления и температуры
Inregelen van debiet, druk en temperatuur
Regulacja przepływu, ciśnienia i temperatury
Балансиране на дебита, налягането и температурата
Echilibrare hidraulicã
Bilanciamento delle portate, pressioni e temperature
自控产品
Vyvážení průtoku, tlaku a teploty
3,99 MB