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Flypass

Versatile and variable
Flypass Set

The Oventrop Flypass Set consists of a connection unit, a strainer and a Cocon QTZ pressure independent control valve (PICV). It offers functions to facilitate installation, commissioning and pressure independent flow control of terminal units in hydronic systems.

The advantages of the Flypass Set

  • Before installation of the terminal unit the bypass function enables to flush, fill and also operate the supply system
  • For installation of the terminal unit the Flypass Set enables quick and easy connection between supply and unit
  • For commissioning the Flypass Set provides functions to flush, fill and vent either supply or terminal unit
  • For operation the Flypass Set is equipped with a Cocon QTZ PICV for pressure independent flow control

Flypass Multifunctional Connection Set:
Functions at a glance

Flypass Funktionen Grafiken
Normal operation
Flypass Funktionen Grafiken
Bypass operation
Flypass Funktionen Grafiken
Shutoff
Flypass Funktionen Grafiken
Fill and vent supply
Flypass Funktionen Grafiken
Drain supply and terminal unit, Vent and flush supply
Flypass Funktionen Grafiken
Drain, vent and flush supply
Flypass Funktionen Grafiken
Fill and flush terminal unit
Flypass Funktionen Grafiken
Drain terminal unit
Flypass Funktionen Grafiken
with Accessories: Top up, vent and flush terminal unit with second drain valve
Flypass Funktionen Grafiken
with Accessories: Measure ΔP, for example with OV-DMC 3 measuring system
Flypass with Cocon QTZ
FLYPASS SET WITH COCON QTZ
Size: 1/2"
Control range: 0.9 up to 5.7 US gpm

Consisting of a Flypass fitting with strainer and a Cocon QTZ pressure independent control valve, completely pre-assembled, function and pressure tested.
Flypass mit Cocon QTZ
FLYPASS SET WITH COCON QTZ
Size: 3/4"
Control range: 1.1 up to 7.9 US gpm

Consisting of a Flypass fitting with strainer and a Cocon QTZ pressure independent control valve, completely pre-assembled, function and pressure tested.
Externally threaded connection
EXTERNALLY THREADED CONNECTION
Size: 1/2"
Suitable for: Unit connection on Flypass 1/2
Size: 3/4"
Suitable for: Unit connection on Flypass 3/4”

Remains balanced under pressure:
Cocon QTZ

Pressure independent flow control: the desired flow is set at the Cocon QTZ control valve which then limits the flow into the terminal unit regardless of the differential pressure. Flow setting is easily done with a handwheel with US gpm markings. No reference tables needed to find the right flow setting.
Cocon Q Detail
The PICV can be equipped with a modulating, floating or on / off actuator for linear or equal percentage operation. The unit is protected against dirt by a strainer on the inlet. The Flypass Set is delivered completely pre-assembled, function and pressure tested.
Flypass Flow Rate Curve
FLOW RATE CURVE
 
1 Below the control range: The flow rate increases to the kvs characteristic line (max. control setting, fully open). The flow rate can be calculated using the kv formula.

2 Within the control range: The flow rate is constantly adjusted to the set value.

3 Above the control range: The flow rate remains approx. at the set value. There is a risk of noise development and / or fluctuations.
 

Oventrop
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Established as a foundry of brass fixtures in 1851, Oventrop has since evolved into a global manufacturer of balancing valves and thermostatic radiator valves for the building industry and is the partner for efficient heating and cooling. Its modular systems and services offer pioneering solutions for all HVAC experts, easy and flexible – from planning to installation, from industry to trade. Oventrop accompanies all its partners over many years – competently and personally.
 
As a family business with a history of over 170 years, Oventrop is rooted in the Sauerland region in the Northwestern part of Germany, but also has a strong international presence with eight subsidiaries and numerous sales agencies worldwide.
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Learn more about
Flypass Set and Cocon Q