DMT Series
Purpose-built for tunnelling, municipal networks and plant air — low pressure, high flow
Range: 36–66 m³/min · 7–8 bar (low pressure, high flow)
5
models in production, 160–315 kW
7–8
bar, configured for low pressure and high flow
100%
stepless speed control — no idle losses of fixed-speed units
- Full-range VSD: a four-pole permanent-magnet motor follows the swings in air demand as drilling, shotcreting and mucking alternate
- Low vibration, low noise: a multi-layer acoustic enclosure and isolation mounts damp noise from the airend outwards
- Built for harsh sites: upgraded electrical protection, cooling margin and filtration against damp, dust and wide temperature swings
- Dedicated industrial controller: real-time pressure and humidity data with instant protection against over-pressure, over-temperature and phase faults
- Where grid power is available: quieter, lower energy per m³ and longer service intervals than diesel units
Feature 1
Full-range variable-speed drive
A high-efficiency four-pole permanent-magnet motor with variable-speed drive gives stepless control across the range. It follows the changing demand of drilling, shotcreting and mucking, removing the unloaded running of fixed-speed units — savings are greatest on long continuous supply.
Feature 2
Low-vibration, low-noise design
Tunnels are enclosed and echo heavily, so the unit uses a multi-layer acoustic enclosure and isolation mounts to damp noise from source to housing — meeting strict limits in municipal tunnels and plants.
Feature 3
Built for harsh conditions
Electrical protection, cooling margin and filtration are upgraded for tunnels, municipal networks and plants — resisting damp, dust and wide temperature swings for long, intensive operation.
Feature 4
Dedicated industrial control
Underground supply lines are long, voltage fluctuates and humidity is high. A dedicated compressor controller reads pressure and humidity in real time and protects instantly against over-pressure, over-temperature and phase faults.
Feature 5
Smart diagnostic panel
An integrated panel shows status and key parameters at a glance, with self-diagnosis, plain fault codes, service reminders and run history — lowering underground maintenance cost and downtime risk.
Full model list
5 models in production. Switch by drive and compression stages, and filter by air delivery, pressure and engine brand.
Showing 5
| Model | Air delivery (m³/min) | Pressure (bar) | Power | Outlet | Chassis | Weight (kg) | Dimensions (mm) | |
|---|---|---|---|---|---|---|---|---|
| DMT160-36/7 | 36 | 7 | PM VSD 160kW | 1-1.5"、1-DN80 | 4-wheel | 4000 | 3700×2050×2270 | Quote |
| DMT200-42/7 | 42 | 7 | PM VSD 200kW | 1-1.5"、1-DN80 | 4-wheel | 4900 | 3950×2150×2350 | Quote |
| DMT220-45/7 | 45 | 7 | PM VSD 220kW | 1-1.5"、1-DN80 | 4-wheel | 4900 | 3950×2150×2350 | Quote |
| DMT250-56/8 | 56 | 8 | PM VSD 250kW | 1-1.5"、1-DN80 | 4-wheel | 5500 | 4150×2150×2350 | Quote |
| DMT315-72/8 | 66 | 8 | PM VSD 315kW | 1-1.5"、1-DN100 | 4-wheel | 8000 | 4500×2260×2550 | Quote |
No models match. Try widening the filters.
Not sure which compressor you need?
Answer 6 quick questions — country, application, hole size, rock and site conditions — and get recommended models in about 3 minutes
Options & accessories
View service kits ›
Heavy-duty desert air-filter kit
Cold-start system
High-altitude intake option
IoT diagnostic panel
FAQ
Can the DMT and M Series replace each other?
+
Not recommended. DMT is configured for low pressure and high flow (7–8 bar); the M Series covers 8–35 bar. Size to the pressure you actually need — running a high-pressure unit at low pressure wastes energy.
What if there is no grid power in the tunnel?
+
DMT units are electric (PM VSD) and need site power. Without a grid connection, choose an M Series diesel unit.
Is maintenance different for VSD units?
+
The control system differs from standard units. Use the KayDrill maintenance manual and technicians familiar with VSD systems; the manual is in the Download Center.
On-site video
Real working footage showing noise, vibration and the control panel
