• Best quality
  • Quick assembly
  • Longevity




HeatBloC® K31 DN 20 (¾")

direct / unmixed
Application range: for boiler charging, for modulating temperature heating
Recommended application range: up to 30 kW; 20 K up to 1300 l/h

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Our offer is exclusively aimed at corporate clients.

Operating data
Max. operating temperature: 110 °C
Dial thermometer: 0 - 120 °C
Output: 30 kW
Max. operating pressure: 6 bar
Temperature difference: 20 K
Kvs value: 4.7
Flow rate: 1300 l/h
Check valves: 1 x 200 mm wc
Dial thermometer: 0 - 120 °C
Shut-off valves: Ball valves with handle
Opening pressure check valve: 200 mm wc
Number of check valves: 1
Height: 385 mm
Width: 180 mm
Nominal diameter: DN 20 (¾")
Installation length: 255 mm
Connection generator: 1" ext. thread, flat sealing
Connection consumer: ¾" int. thread
Centre distance: 90 mm
Valves and fittings: Brass
Gaskets: EPDM
Insulation: EPP
Flat-sealing connections ¾'' internal thread / 1'' external thread
with 1" union nut for assembly on PAW distribution manifolds
with PAW mounting equipment, the HeatBloCs can be installed on wall brackets

Large ball valve handles,
easy handling, visible closing position

EnEV-compliant functional insulation
made of durable elastic EPP, complete insulation of valves and fittings, ventilation opening to cool the pump
the insulation for the distribution manifold is integrated in the heating circuit insulation

Free access to the pump head
by simply removing the front insulation shell

Check valve in the return pipe
can be opened, 200 mm wc, spring-loaded, thus suited for horizontal and overhead installation

Flow on the right = standard
Flow and return line can be changed on site, also for heating circuits with mixing valve

All water-carrying parts are made of brass

Full metal thermometers
can be pulled off, with immersion sleeve integrated in the ball valve

PAW heating pumps with high-efficiency (ECM) technology
fitted with 2 m cable, completely premounted, integrated in the insulation, pressure tested, with serial number, perfectly designed system, pump characteristics, EuP/ErP READY

Pump can be isolated,
so that it can be replaced without draining