Shenyang ABT Drilling Equipment Co., Ltd.
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NQL Series High Air Pressure DTH Hammers Without Foot Valve

NQL Series High Air Pressure DTH Hammers Without Foot Valve

ABT produces the highest quality and efficient DTH hammer and drill bits for the mining, construction, and water well industries. Drilling and blasting engineers and well contractors rely on ABT equipment because each of our product uses superior materials and advanced processes.
  • Product Description
  • Specification
The high-pressure submerged hole impactor without nylon tube is a valveless high-pressure impactor designed by our company. It is one of the most advanced impactors in the world, and the pressure is 12-30 bar. Its main features are as follows:
1.Out of the trouble of foot valve fracture expansion and contraction.
2.Lower energy consumption and higher impact frequency. The drilling speed is 15%-30% higher than the one with foot valve.
3.Simple structure, reliable parts, long life span, easy and cheap maintenance.
4. The components are few, the structure is simple, and all the parts are hardened. Therefore, the working life is long, the failure is few, and the maintenance is convenient.
5, the joint box card brazing sleeve is threaded and connected with the outer cylinder, easy to disassemble.

According to the different bits of the drill, it is divided into the following series:

NQL Series High Air Pressure DTH Hammers Without Foot Valve
Item Description Weight(kg)
1、Top Sub 6.5 13.7 20 34 35
2、 “O” Ring Of Top Sub 0.01 0.015 0.015 0.015 0.01
3、Breakout Ring - - - 0.3 0.04
4、Chenck Valve 0.35 0.7 0.7 1.2 1.2
5、Spring 0.05 0.1 0.1 0.1 0.1
6、Air Distributor 1.5 2 3.5 6 7
7、Internal Cylinder 2.1 2.7 4.2 6.5 7.5
8、Piston 8.5 15 23 42.5 48
9、External Cylinder 15.2 24 30 59 75
10、Guided Sleeve 1.8 3 4 6.3 12
11、“O” Ring Of Stop Ring 0.005 0.01 0.01 0.01 0.01
12、Stop Ring 0.2 0.4 0.6 1.4 1.7
13、Breakout Ring - - - 0.3 0.4
14、Drive Chuck 3.2 4.5 5.5 13 15
15、Drill Bit 9 16 25 35 50
Technical Data
Length(Without Bit) NQL4A NQL5A NQL6A NQL8A NQL95A
1070mm 1090mm 1183mm 1330mm 1340mm
Weight(Without Bit) 40.00kg 67.00kg 90.00kg 171.00kg 203.00kg
External Diameter Ø99mm Ø126 mm Ø165mm Ø180/Ø185mm Ø203mm
Bit Shank QL40 QL50 QL600 QL80 QL80
Hole Range Ø110-Ø135mm Ø155-Ø203mm Ø155-Ø203mm Ø195-Ø254mm Ø216-Ø254mm
Connection Thread API2 3”/8REG API2 3”/8REG API3 1”/2REG API4 1”/2REG API4 1”/2REG
API3 1”/2REG
API2 7”/8REG
Working Pressure 1.2-2.0Mpa 1.3-2.3Mpa 1.5-2.5Mpa 1.5-3.0Mpa 1.8-3.0Mpa
Impact Rate at 17 Bar 30HZ 28HZ 25HZ 22HZ 22HZ
Recommended Rotation Speed 20-30r/min 20-35r/min 20-30r/min 15-25r/min 15-25r/min
Air Consumption 1.0Mpa:5.0m³/min 1.0Mpa:7.0m³/min 1.0Mpa:9.0m³/min 1.0Mpa:12.0m³/min 1.0Mpa:16.0m³/min
1.8Mpa:9.0m³/min 1.8Mpa:14.0m³/min 1.8Mpa:18.0m³/min 1.8Mpa:22.0m³/min 1.8Mpa:28.0m³/min
2.4Mpa:14.0m³/min 2.4Mpa:19.0m³/min 2.4Mpa:26.0m³/min 2.4Mpa:28.0m³/min 2.4Mpa:39.0m³/min
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Add:No. 95-2, blacksmith Road, Hunnan District, Shenyang, Liaoning