TTM Shuntopac® 20-200 FK

Shunt unit for district cooling

Shuntopac® 20-200 FK is a shunt unit that makes it possible to raise the return temperature of a district cooling installation and thus avoid additional costs in the form of flow rate. High heating in an installation increases the efficiency and utilization of the district cooling installation.

Shuntopac® 20-200 FK is available as standard with connection dimensions from DN 20 to DN 200. The shunt unit can be equipped with several components of any make, e.g. pump, valves, piping material etc.

Shuntopac® 20-200 FK is supplied with a fire and corrosion resistant Aluzink sheet metal cover. The insulation is AF/Armaflex AF-2 as standard. he shunt unit has a stand with four legs and foot plates for floor set-up and attachment. The standard pipe package consists of fully welded pressure vessel pipes in accordance with the standard. EN 10216-2:2013. Pipe packages in other materials, e.g. stainless steel, copper or with surface treatment can be supplied on request.

The design of the pipe package, in the specified mounting positions, provides a barrier against unwanted energy transfer due to double circulation.

Shuntopac® 20-200 FK has the EC declaration according to the Machinery Directive 2006/42/EC, ”Partly completed machinery”.


1. Seat valve
2 pcs. seat valves of any make and type. Supplied with or without actuator depending on make, type and requirements.

2. Adjusting valves
2 pcs. of any make, type and dimension. Mounted on the pipe package with coupling or flange connection. IMI/TA STAD/F is supplied as standard. Can also be supplied with dynamic adjustment valves or differential pressure regulator.

3. Shut-off valves
3 pcs. low lead ball valves DN 20-50 with full flow and high stem neck respectively 3 pcs. butterfly valves DN 65-200, dimensioned to act as end valves if the shunt unit is dismantled from the system. Mounted to the pipe package with conical coupling and flange respectively.

4. Pump Optional
manufacture and type with “wet” or “dry” motor.

5. Thermometers
5 pcs. bimetallic thermometers graduated every 2° from -40 – +40 °C °C, mounted in pocket or immersion tube.

6. Non-return valve
1 pc made of brass/cast iron/stainless steel with spring-loaded cone. Service-friendly mounted in a flange connection.

7. Drainage
Design with screwed hose joint R 1/2”.

8. Test sockets
Type IMI/TA STAD/F mounted on all connections so that complete flow and differential pressure measurement can be carried out.

Examples of configurations

09 FV

10 FV

System solution. Contact TTM for dimensioning and additional connection options.


TTM SHUNTOPAC® Green Line is a category of shunt units equipped with low-lead valves. Green Line is intended for customers with high demands for improved environmental assessments


TTM SHUNTOPAC® Dynamic gives correct regulation even in systems with varying differential pressures or where the differential pressure is unknown.


TTM SHUNTOPAC® EM is a category of shunt units equipped with ultrasound energy metering equipment according to EN 1434 class 2 and MID 2004/22/EC.


Simonsland in Borås

When Kanico created a new district in the town of Borås, they chose TTM to supply shunt units for the HVAC systems. The area is called Simonsland and contains 60,000 m2 of buildings.


TTM Energiprodukter was one of the suppliers in the construction of the prestigious Copenhagen Opera House Together with their reseller, the company succeeded in winning the deal and delivering 98 different shunt units.


NCC are building their new head office at Järva Krog in Solna. The new head office has a strategic and easily accessible position adjacent to the E4 motorway.