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DTH hammers selector reference
Date:2018/9/27 10:16:43


Prospecting project / Geotechnical drilling engineering Reference for pneumatic impactor selection table

       

DTH Hammer is the main drilling tool for DTH hammer drilling, and its performance directly affects drilling efficiency. Hunan New Diamond Construction Machinery Co., Ltd. attaches great importance to the study of the performance of the impactor, solves many key technical problems, and greatly improves the performance of the impactor. There are many series of products developed, which are suitable for deep hole, low consumption and low pressure medium and high pressure products. Most of them are valveless structure, with few internal parts, simple structure, strong and easy to use.

From the perspective of application in recent years. The products of Hunan New Diamond Construction Machinery Co., Ltd can basically meet the engineering needs, and the price is cheaper than that of foreign countries. In addition, increasing the air pressure can improve the drilling efficiency, which is also the reason for domestic and foreign efforts to develop high air pressure impactors. For construction units, the selection of high wind pressure or low wind pressure impactor depends on the actual situation. When conditions permit, high wind pressure impactor should be selected as far as possible, but the price of high wind pressure and low wind pressure of impactor with the same specifications is quite different, so attention should be paid to the selection.


       

Matching table for pneumatic downhole impactor of Hunan new diamond engineering machinery Co., Ltd.


DTH Hammer

Product model

Working Pressure/Mpa

Air Consumption/m3 min

External Diameter/mm

Hole Range/mm

Connection Thread

Middle-Low Air Pressure

BR

BR1A

1.0-1.5Mpa

0.7Mpa:1.5m³/min

1.0Mpa:2.5m³/min

1.4Mpa:3.0m³/min

Ø54mm

Ø64-Ø76mm

Br40,BOX

BR2A

1.0-1.5Mpa

0.7Mpa:2.5m³/min

1.0Mpa:4.0m³/min

1.4Mpa:5.0m³/min

Ø62mm

Ø70-Ø90mm

Rd50,BOX

BR3A

1.0-1.5Mpa

0.7Mpa:4.0m³/min

1.0Mpa:6.0m³/min

1.4Mpa:8.0m³/min

Ø82mm

Ø90-Ø110mm

API2 3”/8REG



DTH Hammer

Product model

Working Pressure/Mpa

Air Consumption/m3 min

External Diameter/mm

Hole Range/mm

Connection Thread

High Air Pressure Without Foot Vale

ND

ND55C(A)

1.3-2.3Mpa

1.0Mpa:8.0m³/min

1.8Mpa:6.0m³/min

2.4Mpa:19.0m³/min

Ø126mm

Ø135-Ø155mm

API2 3”/8REG

API3 1”/2REG

API2 7”/8REG

ND65A

1.5-3.0Mpa

1.0Mpa:9.0m³/min

1.8Mpa:18.0m³/min

2.4Mpa:26.0m³/min

Ø142/Ø146mm

Ø155-Ø203mm

API3 1”/2REG

ND75A

1.5-3.0Mpa

1.0Mpa:11.0m³/min

1.8Mpa:20.0m³/min

2.4Mpa:28.0m³/min

Ø165mm

Ø175-Ø216mm

API3 1”/2REG

ND85A

1.5-3.0Mpa

1.0Mpa:12.0m³/min

1.8Mpa:22.0m³/min

2.4Mpa:28.0m³/min

Ø180/Ø185mm

Ø195-Ø254mm

API4 1”/2REG

ND1120A

2.0-3.5Mpa

1.0Mpa:28.0m³/min

1.8Mpa:50.0m³/min

2.4Mpa:71.0m³/min

Ø275mm

Ø305-Ø445mm

API6 5”/8REG

NQL

NQL4A

1.2-2.0Mpa

1.0Mpa:5.0m³/min

1.8Mpa:9.0m³/min

2.4Mpa:14.0m³/min

Ø99mm

Ø110-Ø135mm

API2 3”/8REG

NQL5A

1.3-2.3Mpa

1.0Mpa:7.0m³/min

1.8Mpa:14.0m³/min

2.4Mpa:19.0m³/min

Ø126 mm

Ø155-Ø203mm

API2 3”/8REG

API3 1”/2REG

API2 7”/8REG

NQL6A

1.5-2.5Mpa

1.0Mpa:9.0m³/min

1.8Mpa:18.0m³/min

2.4Mpa:26.0m³/min

Ø165mm

Ø155-Ø203mm

API3 1”/2REG

NQL8A

1.5-3.0Mpa

1.0Mpa:12.0m³/min

1.8Mpa:22.0m³/min

2.4Mpa:28.0m³/min

Ø180/Ø185mm

Ø195-Ø254mm

API4 1”/2REG

NQL95A

1.8-3.0Mpa

1.0Mpa:16.0m³/min

1.8Mpa:28.0m³/min

2.4Mpa:39.0m³/min

Ø203mm

Ø216-Ø254mm

API4 1”/2REG

NSD

NSD4A

1.2-2.0Mpa

1.0Mpa:6.0m³/min

1.8Mpa:9.0m³/min

2.4Mpa:14.0m³/min

Ø99mm

Ø110-Ø135mm

API2 3”/8REG

NSD5A

1.3-2.3Mpa

1.0Mpa:7.0m³/min

1.8Mpa:14.0m³/min

2.4Mpa:19.0m³/min

Ø126mm

Ø155-Ø190mm

API2 3”/8REG

API3 1”/2REG

API2 7”/8REG

NSD6A

1.5-2.5Mpa

1.0Mpa:9.0m³/min

1.8Mpa:18.0m³/min

2.4Mpa:26.0m³/min

Ø146mm

Ø155-Ø203mm

API3 1”/2REG

NSD8A

1.5-3.0Mpa

1.0Mpa:12.0m³/min

1.8Mpa:22.0m³/min

2.4Mpa:28.0m³/min

Ø180/Ø185mm

Ø195-Ø254mm

API4 1”/2REG

NSD10A

2.0-3.5Mpa

1.8Mpa:14.0m³/min

2.4Mpa:65.0m³/min

Ø226mm

Ø254-Ø311mm

AP6 5”/8REG

NSD12A

2.0-3.5Mpa

1.0Mpa:28.0m³/min

1.8Mpa:50.0m³/min

2.4Mpa:71.0m³/min

Ø275mm

Ø305-Ø445mm

API6 5”/8REG



DTH Hammer

Product model

Working Pressure/Mpa

Air Consumption/m3 min

External Diameter/mm

Hole Range/mm

Connection Thread

High Air Pressure

With Foot Valve

No bottom Valve

ND

ND35

1.0-1.5Mpa

1.0Mpa:4.5m³/min

1.5Mpa:9.0m³/min

Ø82mm

Ø90-Ø110mm

API2 3”/8REG

ND45

1.2-2.0Mpa

1.0Mpa:6.0m³/min

1.8Mpa:10.0m³/min

2.4Mpa:15.0m³/min

Ø99mm

Ø110-Ø135mm

API2 3”/8REG

ND55

1.3-2.3Mpa

1.0Mpa:9.0m³/min

1.8Mpa:15.0m³/min

2.4Mpa:23.0m³/min

Ø126mm

Ø135-Ø155mm

API2 3”/8REG

API3 1”/2REG

API2 7”/8REG

ND55C

1.3-2.3Mpa

1.0Mpa:9.0m³/min

1.8Mpa:15.0m³/min

2.4Mpa:23.0m³/min

Ø126mm

Ø135-Ø155mm

API2 3”/8REG

API3 1”/2REG

API2 7”/8REG

ND65

1.5-2.5Mpa

1.0Mpa:10.0m³/min

1.8Mpa:20.0m³/min

2.4Mpa:28.5m³/min

Ø142mm Ø144mm

Ø146mm Ø148mm

Ø155-Ø190mm

API3 1”/2REG

ND85

1.5-3.0Mpa

1.0Mpa:15.0m³/min

1.8Mpa:26.0m³/min

2.4Mpa:34.0m³/min

Ø180mm/Ø185mm

Ø195-Ø254mm

API4 1”/2REG

ND1120

2.0-3.5Mpa

1.0Mpa:30.0m³/min

1.8Mpa:56.0m³/min

2.4Mpa:78.0m³/min

Ø275mm

Ø305-Ø445mm

API6 5”/8REG

NQL

NQL4

1.2-2.0Mpa

1.0Mpa:6.0m³/min

1.8Mpa:10.0m³/min

2.4Mpa:15.0m³/min

Ø99mm

Ø110-Ø135mm

API2 3”/8REG

NQL5

1.3-2.3Mpa

1.0Mpa:9.0m³/min

1.8Mpa:15.0m³/min

2.4Mpa:23.0m³/min

Ø126mm

Ø135-Ø155mm

API3 1”/2REG

API2 7”/8REG

NQL6

1.5-2.5Mpa

1.0Mpa:10.0m³/min

1.8Mpa:20.0m³/min

2.4Mpa:28.5m³/min

Ø142mmØ144mm

Ø146mmØ148mm

Ø155-Ø190mm

API3 1”/2REG

API2 7”/8REG

2 7”/8 IF

NQL8

1.5-3.0Mpa

1.0Mpa:15.0m³/min

1.8Mpa:26.0m³/min

2.4Mpa:34.0m³/min

Ø180mm

Ø195-Ø254mm

API4 1”/2REG

NSD

NSD4

1.2-2.0Mpa

1.0Mpa:6.0m³/min

1.8Mpa:10.0m³/min

2.4Mpa:15.0m³/min

Ø99mm

Ø110-Ø135mm

API2 3”/8REG

NSD5

1.3-2.3Mpa

1.0Mpa:9.0m³/min

1.8Mpa:15.0m³/min

2.4Mpa:23.0m³/min

Ø126mm

Ø135-Ø155mm

API3 1”/2REG

API2 7”/8REG

NSD6

1.5-2.5Mpa

1.0Mpa:10.0m³/min

1.8Mpa:20.0m³/min

2.4Mpa:28.5m³/min

Ø142mmØ144mm

Ø146mmØ148mm

Ø155-Ø190mm

API3 1”/2REG

NSD8

1.5-3.0Mpa

1.0Mpa:15.0m³/min

1.8Mpa:26.0m³/min

2.4Mpa:34.0m³/min

Ø180mm/Ø185mm

Ø195-Ø254mm

API4 1”/2REG

NSD10

2.0-3.5Mpa

1.0Mpa:22.0m³/min

1.8Mpa:40.0m³/min

2.4Mpa:55.0m³/min

Ø226mm

Ø254-Ø311mm

API4 1”/2REG

API6 5”/8REG

NSD12

2.0-3.5Mpa

1.0Mpa:30.0m³/min

1.8Mpa:56.0m³/min

2.4Mpa:78.0m³/min

Ø275mm

Ø305-Ø445mm

API6 5”/8REG


Note: Due to the large number of models and specifications for the production of down-the-hole hammers, some of the products listed in the table are for reference only.






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