Blow Downs for RC Drilling


You don’t build a great RC drill rig hydraulic blow down valve overnight. Harlsan’s Hydraulic Blow Down represents years of development and is reflected in its reputation within the RC drilling industry today.

While manual RC Drilling Blow Down operations are time consuming and involve safety issues, the Harlsan Hydraulic Blow Down can clear RC drill string blockages, back flush holes, improve sample purity and clear bit face blockages at the flick of a switch. The Blow Down is available in single port design for blow down function only or double port for blow up and blow down operation.


“The durability, availability of parts & ease of service keeps downtime to a minimum. We simply drill more metres with Harlsan Blow Downs on our rigs.”

Jason Howie, Operations Manager – Ranger Drilling

Designed and field tested for the toughest of reverse circulation drilling conditions. Get a boost in production and reduce down time with a Harlsan Blow Down on your rig.

Product Brochure

Download the Harlsan Blow Downs for RC Drilling Brochure Harlsan Blow Downs for RC Drilling Brochure

Ordering Information

From Africa through to Asia, Eastern Europe through to the UK, and Canada through to South America. We can supply you with robust and productive Harlsan Blow Downs.

You can depend on us

For pricing, immediate supply or customised orders
Call (08) 9021 1288 (+61 8 9021 1288 international).

Get your engineering component and part supply requirements on time, on budget and on track with Harlsan manufacturing services. Call us now and request for a quote.

Avatar for Harley Hollier

About Harley Hollier

Harley Hollier has had extensive experience in the reverse circulation drilling industry as a director of Harlsan Industries. Harley’s current industry roles incorporate the engineering, research and development of innovative reverse circulation drilling equipment and supporting customers with drilling application and solution development. He can be contacted on Ph. +61 8 9021 1288 (GMT +8 Hours) or email:
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