Clenston air and dirt separator

Air and dirt separator for the removal of dissolved gases and dirt particles from heating systems.

Available in 7 models to suit pipe sizes of DN50, DN65, DN80, DN100, DN125, DN150 and DN200.

Warranty 2 product item

Product information

    • Protects boilers and heating system against corrosion, pump failure and other problems caused by air, dirt and sludge in the heating system.
    • Promotes longer system life through air and dirt elimination.
    • Saves time when servicing / commissioning as the unit can be flushed whilst the system is operational.
    • Large collector capacity reduces need for flushing.
    • Clenston air and dirt separator units are suitable for bi-directional flow.
    • Saves space and costs by combining the removal of both air and dirt in one unit.
    • Buy in confidence from a UK manufacturer with decades of commercial heating and hot water expertise.

Technical data

CL-50 CL-65
Nominal bore (mm) 50 65
Pipe connection DN50-PN16 DN65-PN16
Dry weight (kg) 15 16
Volume flow rate*
(m3/ hr) 12.2 20.4
(l/s) 3.39 5.67
Optimum boiler power* (kW)
@11°C ΔT 156 261
@20°C ΔT 283 474
@30°C ΔT 425 711
*@ Nominal fluid velocity through Clenston = 1.5m/s


Clenston air and dirt separator brochure

Product brochures 230 kb

Clenston air and dirt separator technical data table

Data tables 230 kb

Clenston air and dirt separator installation manual

Installers guides 240 kb

Ideal uses/applications

  • Matched for use with Hamworthy boilers
  • Refurbishment projects with old, dirty heating systems

Optional extras

  • There are no optional extras for this product.

Often bought with

Upton modular boiler

Learn more

You might also be interested in

Horton chemical dosing pot

Learn more