High Air Pressure DTH Hammer without Foot Valve

It is a kind of high air pressure DTH hammer without foot valve, and it is our newest design. It is also one of the most advanced DTH hammers in the world.
It has the following advantages:
Out of the trouble of foot valve fracture and expansion and contraction.
Lower energy consumption and higher impact frequency. The drilling speed is 15%-30% higher than the one with foot valve.
Simple structure, reliable parts, long life span, easy and cheap maintenance.
Lower air and oil consumption. The oil consumption is about 10% lower than the one with foot valve.

Inquiry
 Item Description KD35A KD45A KD45S KD55A KD55S KD65A KD75A KD85A
1. Top Sub 4.20 6.50 6.00 13.70 13.30 20.00 23.00 34.00
2. O ring of Top Sub 0.01 0.01 0.01 0.015 0.015 0.02 0.015 0.015
3. Breakout Ring






0.30
4. Check Valve 0.20 0.35 0.30 0.70 0.70 0.70 0.70 1.20
5. Spring 0.02 0.05 0.05 0.10 0.10 0.10 0.10 0.10
6. Air Distributor 0.80 1.50 1.30 2.00 1.90 3.50 4.50 6.00
7. Internal Cylinder 1.30 1.50 1.90 2.80 2.70 4.20 6.50 6.50
8. Piston 5.50 8.50 7.80 15.00 14.50 23.00 28.00 42.50
9. External Cylinder 9.50 15.20 14.60 24.00 23.00 31.50 40.00 60.00
10. Guided Sleeve 1.00 1.30 1.20 2.60 2.50 6.50 7.50 5.30
11. O Ring of Stop Ring 0.05 0.01 0.01 0.01 0.01 0.01 0.01 0.01
12. Stop Ring 0.15 0.30 0.20 0.50 0.50 0.60 0.80 1.20
13. Break out Ring






0.30
14. Drive Chuck 1.90 3.40 3.40 6.50 6.20 6.00 8.00 17.50
15 Drill Bit 5.00 9.00 8.50 16.00 15.50 26.00 28.50 40.00
Technical Date
Model KD35A KD45A KD45S KD55A
Length(Without Bit) 888mm 1011mm 986mm 1110mm
Weight(Without Bit) 25.00kg 43.20kg 37.00kg 69.00kg
External Diameter Φ82mm Φ99mm Φ92mm Φ125mm
Bit Shank IR3.5 COP44/DHD340 COP44/DHD340 COP54/DHD350R
Hole Range Φ90-Φ115mm Φ110-Φ135mm Φ105-Φ120mm Φ135-Φ155mm
Connection Thread API 2 3/8" Reg 1.0-1.5Mpa 25HZ 25-40r/min API 2 3/8" Reg 1.2-2.0Mpa 30HZ 22-35r/min API 2 3/8" Reg 1.2-2.0Mpa 30HZ 25-40r/min API 2 3/8" Reg API 31/2'' Reg API 2 /7/8'' Reg API 2 7/8'' IF
1.3-2.3Mpa
28HZ
20-35r/min
Working Pressure 1.0Mpa:3.8m³/min 1.0Mpa:6m³/min 1.8Mpa:8m³/min 1.0Mpa:7m³/min
Impact Rate at 17 Bar 1.5Mpa:7.5m³/min 1.8Mpa:10m³/min 2.4Mpa:13m³/min 1.8Mpa:14m³/min
Recommended 2.4Mpa:15m³/min KD35A 2.4Mpa:19m³/min KD45A KD45S KD55A
Rotation Speed
Air Consumption 888mm 1011mm 986mm 1110mm
25.00kg 43.20kg 37.00kg 69.00kg
Φ82mm Φ99mm
Model KD55S KD65A KD75A KD85A
Length (Without Bit) 1110mm 1238mm 1258mm 1359mm
Weight (Without Bit) 66.00kg 98.00kg 120.00kg 175.00kg
External Diameter Φ116mm Φ142mm Φ165mm Φ180mm/Φ185mm
Bit Shank COP54/DHD350R COP64/DHD360 COP64/DHD360 COP84/DHD380
Hole Range Φ127-Φ145mm Φ155-Φ203mm Φ175-Φ216mm Φ195-Φ254mm
Connection Thread API 2 3/8" Reg API 31/2'' Reg
API 2 /7/8'' Reg API 2 7/8'' IF 		API 3 1/2" Reg API 3 1/2" Reg API 4 1/2" Reg
Working Pressure 1.3-2.3Mpa 1.5-3.0Mpa 1.5-3.0Mpa 1.5-3.0Mpa
Impact Rate at 17 Bar 28HZ 25HZ 23HZ 22HZ
Recommended Rotation Speed 20-35r/min 20-30r/min 20-30r/min 15-25r/min
Air Consumption 1.0Mpa:7m³/min 1.0Mpa:9m³/min 1.0Mpa:11m³/min 1.0Mpa:12m³/min
1.8Mpa:13.5m³/min 1.8Mpa:18m³/min 1.8Mpa:20m³/min 1.8Mpa:22m³/min
2.4Mpa:18m³/min 2.4Mpa:26m³/min 2.4Mpa:28m³/min
Inquiry
 Model KSD4A KSD5A KSD6A KSD8A
1. Top Sub 6.5 13.7 20 34
2. O ring of Top Sub 0.1 0.015 0.015 0.015
3. Breakout Ring


0.3
4. Check Valve 0.35 0.7 0.7 1.2
5. Spring 0.05 0.1 0.1 0.1
6. Air Distributor 1.5 2 3.5 6
7. Internal Cylinder 2.1 2.8 4.2 6.5
8. Piston 8.5 15 23 42.5
9. External Cylinder 15.3 24 28 59
10. Guided Sleeve 1.3 2.6 2.5 6
11. O Ring of Stop Ring 0.005 0.01 0.01 0.01
12. Stop Ring 0.2 0.5 0.5 1.2
13. Break out Ring


0.3
14. Drive Chuck 4 7.5 7.5 16
15. Drill Bit 9.8 16 27 37
Technical Date
Model KSD4A KSD5A KSD6A HSD8A
Length(Without Bit) 1012mm 1090mm 1182mm 1330mm
Weight(Without Bit) 40.00kg 70.00kg 90.00kg 174.00kg
External Diameter Φ99mm Φ125mm Φ146mm Φ180/Φ185mm
Bit Shank SD4 SD5 SD6 SD8
Hole Range Φ110-Φ135mm Φ155-Φ190mm Φ155-Φ203mm Φ195-Φ254mm
Connection Thread API 2 3/8" Reg API 2 3/8" Reg API 2 1/2" Reg
API 2 7/8" Reg 		API 3 1/2" Reg API 4 1/2" Reg
Working Pressure 1.2-2.0Mpa 1.3-2.3Mpa 1.5-2.5Mpa 1.5-3.0Mpa
Impact Rate at 17 Bar 30HZ 28HZ 25HZ 22HZ
Recommended Rotation Speed 25-40r/min 20-35r/min 20-30r/min 15-25r/min
Air Consumption 1.0Mpa:6m³/min 1.0Mpa:7m³/min 1.0Mpa:9m³/min 1.0Mpa:12m³/min
1.8Mpa:9m³/min 1.8Mpa:14m³/min 1.8Mpa:18m³/min 1.8Mpa:22m³/min
2.4Mpa:14m³/min 2.4Mpa:19m³/min 2.4Mpa:26m³/min 2.4Mpa:28m³/min
Inquiry
 Model KQL4A KQL5A KQL6A KQL8A
1. Top Sub 6.5 13.7 20 34
2. O ring of Top Sub 0.1 0.015 0.015 0.015
3. Breakout Ring


0.3
4. Check Valve 0.35 0.7 0.7 1.2
5. Spring 0.05 0.1 0.1 0.1
6. Air Distributor 1.5 2 3.5 6
7. Internal Cylinder 2.1 2.7 4.2 6.5
8. Piston 8.5 15 23 42.5
9. External Cylinder 15.2 24 30 59
10. Guided Sleeve 1.8 3 4 6.3
11. O Ring of Stop Ring 0.005 0.01 0.01 0.01
12. Stop Ring 0.2 0.4 0.6 1.4
13. Break out Ring


0.3
14. Drive Chuck 3.2 4.5 5.5 13
15. Drill Bit 9 16 25 35
Technical Date
Model KQL4A KQL5A KQL6A KQL8A
Length(Without Bit) 1070mm 1090mm 1183mm 1330mm
Weight(Without Bit) 40.00kg 67.00kg 92.00kg 171.00kg
External Diameter Φ99mm Φ125mm Φ146mm Φ180/Φ185mm
Bit Shank QL40 QL50 QL60 QL80
Hole Range Φ110-Φ135mm Φ135-Φ155mm Φ155-Φ203mm Φ195-Φ254mm
Connection Thread API 2 3/8" Reg API 2 3/8" Reg API 3 1/2" Reg
API 2 7/8" Reg 		API 3 1/2" Reg API 4 1/2" Reg
Working Pressure 1.2-2.0Mpa 1.3-2.3Mpa 1.5-2.5Mpa 1.5-3.0Mpa
Impact Rate at 17 Bar 30HZ 28HZ 25HZ 22HZ
Recommended Rotation Speed 20-30r/min 20-35r/min 20-30r/min 15-25r/min
Air Consumption 1.0Mpa:5m³/min 1.0Mpa:7m³/min 1.0Mpa:9m³/min 1.0Mpa:12m³/min
1.8Mpa:9m³/min 1.8Mpa:14m³/min 1.8Mpa:18m³/min 1.8Mpa:22m³/min
2.4Mpa:14m³/min 2.4Mpa:19m³/min 2.4Mpa:26m³/min 2.4Mpa:28m³/min
Inquiry
 Model KHM4A KHM5A KHM6A KHM8A
1. Top Sub 6.5 13.7 20 34
2. O ring of Top Sub 0.1 0.015 0.015 0.015
3. Breakout Ring


0.3
4. Check Valve 0.35 0.7 0.7 1.2
5. Spring 0.05 0.1 0.1 0.1
6. Air Distributor 1.5 2 3.5 6
7. Internal Cylinder 2.1 2.8 4.2 6.5
8. Piston 8.5 15 23 42.5
9. External Cylinder 14.8 24 26 61
10. Guided Sleeve 1.8 2.6 4.8 5.3
11. O Ring of Stop Ring 0.005 0.01 0.01 0.01
12. Stop Ring 0.3 0.7 0.8 1.5
13. Break out Ring


0.3
14. Drive Chuck 3.8 6.5 4.2 17.3
15. Drill Bit 6.6 13.5 23 31
Technical Date
Model KHM4A KHM5A KHM6A KHM8A
Length(Without Bit) 1005mm 1110mm 1160mm 1338mm
Weight(Without Bit) 40.00kg 68.50kg 90.00kg 176kg
External Diameter Φ99mm Φ126mm Φ142mmΦ144mm Φ146mmΦ148mm Φ180/Φ185mm
Bit Shank KHM4 KHM5 KHM6 KHM8
Hole Range Φ110-Φ135mm Φ155-Φ190mm Φ155-Φ203mm Φ195-Φ254mm
Connection Thread API 2 3/8" Reg API 2 3/8" Reg API
3 1/2" Reg API 2 7/8" Reg 		API 2 7/8" Reg API 3 1/2" Reg
2 7/8" IF 		API 4 1/2" Reg
Working Pressure 1.2-2.0Mpa 1.3-2.3Mpa 1.5-2.5Mpa 1.5-3.0Mpa
Impact Rate at 17 Bar 30HZ 28HZ 25HZ 22HZ
Recommended Rotation Speed 25-40r/min 20-35r/min 20-30r/min 15-25r/min
Air Consumption 1.0Mpa:5m³/min 1.0Mpa:7m³/min 1.0Mpa:9m³/min 1.0Mpa:12m³/min
1.8Mpa:9m³/min 1.8Mpa:14m³/min 1.8Mpa:18m³/min 1.8Mpa:22m³/min
2.4Mpa:14m³/min 2.4Mpa:19m³/min 2.4Mpa:26m³/min 2.4Mpa:28m³/min
Other Product