Introduction
The Underground DW Outer Injection Single Hydraulic Prop is an underground hydraulic prop used for roof support in coal mine roadways.
Features
1. Height Adjustability
The prop height is adjusted through hydraulic extension, with available heights covering approximately 0.6–4.5 m.
2. Portability
The prop integrates the cylinder and valve unit into a single body, without external pumps or hoses.
3. Ease of Operation
Lifting and lowering are controlled by a manual valve mounted directly on the prop body.
4. Wide Working Stroke
Typical models offer a working stroke of approximately 200–2000 mm,covering common underground support height ranges.
After-sales Service
1.Regional Service Support
2.Technical Assistance
3.Operation Guidance
4.Usage & Maintenance Support
FAQ
Q1: What do you need for a quotation?
Product model, quantity, and surface treatment.
Q2: What is your industry experience?
Long-term manufacturer of coal mine support equipment; first in China certified for a 5-meter single hydraulic prop; involved in 6-meter prop development.
Q3: Are the products certified?
Yes. National coal mine safety certification.
Q4: How is quality checked?
Each unit is inspected before shipment.
Q5: Can technical drawings be provided?
Yes, available before order confirmation.
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| Model project |
Max height (mm) |
min height (mm) |
Working stroke (mm) |
Rated working resistance (KN) |
weight (Kg) |
Rated working pressure (Mpa) |
Pump station pressure (Mpa) |
Initial support (KN) |
Bore diameter (mm) |
Woek liquid |
| DW45--250/110X | 4500 | 2520 | 1980 | 250 | 109 | 28.2 | 15～ 20 |
132.3～ 176.4 |
110 | Emulsioncontaining 1% to2% M10emulsified oil |
| DW42--250/110X | 4200 | 2360 | 1840 | 101 | ||||||
| DW40--250/110X | 4000 | 2250 | 1750 | 95 | ||||||
| DW38--250/110X | 3800 | 2140 | 1660 | 89 | ||||||
| DW35--300/110X | 3500 | 1980 | 1520 | 300 | 75.5 | 34 | ||||
| DW31.5--300/110X | 3150 | 1800 | 1350 | 67 | ||||||
| DW28--350/110X | 2800 | 1620 | 1180 | 350 | 61.1 | 39.7 | ||||
| DW25--350/110X | 2500 | 1450 | 1050 | 57.5 | ||||||
| DW22--350/110X | 2240 | 1300 | 940 | 52.5 | ||||||
| DW20--350/110X | 2000 | 1170 | 830 | 48 | ||||||
| DW18--350/110X | 1800 | 1055 | 745 | 44.5 | ||||||
| DW16--350/110X | 1600 | 940 | 660 | 41 | ||||||
| DW14--350/110X | 1400 | 830 | 570 | 37.5 | ||||||
| DW12--350/110X | 1200 | 720 | 480 | 33 | ||||||
| DW10--350/110X | 1000 | 615 | 385 | 29.5 | ||||||
| DW08--350/110X | 800 | 510 | 290 | 25.5 | ||||||
| DW06-350/110X | 630 | 420 | 210 | 23 | ||||||
| DW35-350/110XH | 3500 | 1980 | 1520 | 208.6 | ||||||
| DW31.5-350/110XH | 3150 | 1800 | 1350 | 190 | ||||||
| DW35--250/100X | 3500 | 1980 | 1520 | 250 | 71 | 34.6 | 108.5～144.7 | 100 | ||
| DW31.5--250/100X | 3150 | 1800 | 1350 | 65 | ||||||
| DW28--300/100X | 2800 | 1620 | 1180 | 300 | 59 | 41.5 | ||||
| DW25--300/100X | 2500 | 1450 | 1050 | 54 | ||||||
| DW22--300/100X | 2240 | 1300 | 940 | 49.5 | ||||||
| DW20--300/100X | 2000 | 1170 | 830 | 45 | ||||||
| DW18--300/100X | 1800 | 1055 | 745 | 41.5 | ||||||
| DW16--300/100X | 1600 | 940 | 660 | 38 | ||||||
| DW14--300/100X | 1400 | 830 | 570 | 34 | ||||||
| DW12--300/100X | 1200 | 720 | 480 | 30.5 | ||||||
| DW10--300/100X | 1000 | 615 | 385 | 27.5 | ||||||
| DW08--300/100X | 800 | 510 | 290 | 24 | ||||||
| DW06-300/100X | 630 | 420 | 210 | 21 |
