Raptor 170kW vs twin 110kW: What changes underground.

Swapping a twin 110kW secondary ventilation fan for a single stage Raptor™ 170kW gives sites a shorter, lighter fan that installs in one lift and delivers the same airflow. The Raptor 170kW replaces two co-rotating stages with one. That means a smaller hole to cut, less weight to hang and less installed power, with no drop in airflow performance.

Key takeaways: What changes when a single stage secondary ventilation fan replaces a twin.

• Length: 2,500 mm shorter.
• Weight: 1,200 kg lighter.
• Installation: one lift in place of several.
• Installed power: 50 kW less.
• Airflow: same performance as a twin 110kW fan.

Raptor 170kW vs twin 110kW secondary ventilation fan comparison.

Download the full comparison guide.

Secondary fan length: 2,500 mm less to fit in.

The Raptor 170kW is 4,211 mm long and a twin 110kW fan is 6,769 mm, which makes the Raptor about 2,500 mm shorter, a 37% shorter footprint. A twin carries two stages, and the single stage Raptor removes the second stage from the overall length.

A shorter fan needs a smaller hole and an easier turn into the drive. In steep declines and tight development ends, the Raptor 170kW needs 50% less stripping of the backs.

Secondary fan weight and installation: one lift instead of several.

The Raptor 170kW weighs about 2,916 kg including its silencer, against about 4,028 kg for the twin, which is about 1,200 kg lighter. It installs as a single-lift fan package, where a twin needs multiple lifts.

A lighter fan is safer to hang, with less load on machinery. One lift in place of several also means less manpower, less machinery and shorter installation time. A lighter fan is also quicker to relocate when a development heading changes shape.

Installed power: 50 kW less than a twin 110kW.

The Raptor 170kW is one 170 kW single stage, while the twin installs 110 kW plus 110 kW. That’s 50 kW less installed power.

Installed power and power drawn are different measures. The running saving depends on duty point and run hours, so a ventilation engineer should model it for the specific duct and distance.

Airflow performance in a three-month underground trial.

The Raptor 170kW delivers the same airflow performance as a twin 110kW fan, with 2,500 mm less length and 50 kW less installed power. In a three-month underground trial, it surveyed at 46.3 m³/s against 46.2 m³/s modelled.

Duty point still depends on duct size and distance, so a ventilation engineer should confirm it for each site.

Where a single stage secondary ventilation fan fits best.

The Raptor 170kW suits new development ends, steep declines and sites replacing ageing twin 110kW fans, because length and lifting weight are the constraints in those drives. Where a drive has generous room and lifting gear is already in place, the length saving matters less. The single lift and the 50 kW reduction in installed power still apply.

Compare the Raptor 170kW with your current twin fan.

Minetek’s Raptor 170kW gives sites a single stage secondary fan that fits into shorter drives, installs in one lift and carries 50 kW less installed power than a twin 110kW. It’s available in about 2 weeks once ordered, against 10 to 12 weeks for a twin, which keeps development advance moving.

Replacing twins or planning a new development end? Connect with Minetek Air’s ventilation team on [email protected] to size a single stage fan against your drive, duct and duty point. Download the Raptor 170kW vs traditional twin 110kW comparison for the full detail