Hunan new diamond Construction Machinery Co., Ltd. is a professional R & D and production of mining, rock chiseling, infrastructure, well foundation pile series of high, medium pressure, reverse circulation DTH impactor, drill; With the pipe drilling products; series of top hammer-impact rock drill bit, screw drill and other drilling technology-based manufacturing enterprises. My company produces, developed a series of high pressure, energy efficient high-pressure, through-type reverse circulation DTH impact drill with drilling efficiency, low failure rate, long life and other advantages. Even for all types of harsh rock with high hardness and high abrasiveness, the Supman Boring Tool can also be used for efficient and economical drilling. "New King Kong" brand DTH drill with its stable quality, excellent performance and selling the country, and exported to Europe, Australia, Africa, Russia, the Middle East, and Southeast Asia.     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 following advantages:      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.Lower air and oil consumption.The oil consumption is about 10% lower than the one with foot valve. The appearance of the picture is different from that of the actual product, and the actual product is the standard.
NQL Series High Air Pressure DTH Hammers Without Foot Valve
Item Description		Weight(kg)
		NQL4A		NQL5A	NQL6A		NQL8A		NQL95A
1、Top Sub		6.50		13.70	20.00		34.00		35.00
2、 “O” Ring Of Top Sub		0.01		0.015	0.015		0.015		0.01
3、Breakout Ring		-		-	-		0.30		0.04
4、Chenck Valve		0.35		0.70	0.70		1.20		1.20
5、Spring		0.05		0.10	0.10		0.10		0.10
6、Air Distributor		1.50		2.00	3.50		6.00		7.00
7、Internal Cylinder		2.10		2.70	4.20		6.50		7.50
8、Piston		8.50		15.00	23.00		42.50		48.00
9、External Cylinder		15.20		24.00	30.00		59.00		75.00
10、Guided Sleeve		1.80		3.00	4.00		6.30		12.00
11、“O” Ring Of Stop Ring		0.005		0.01	0.01		0.01		0.01
12、Stop Ring		0.20		0.40	0.60		1.40		1.70
13、Breakout Ring		-		-	-		0.30		0.40
14、Drive Chuck		3.20		4.50	5.50		13.00		15.00
15、Drill Bit		9.00		16.00	25.00		35.00		50.00
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 API2 7”/8REG			API3 1”/2REG		API4 1”/2REG		API4 1”/2REG
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 1.8Mpa:9.0m³/min 2.4Mpa:14.0m³/min		1.0Mpa:7.0m³/min 1.8Mpa:14.0m³/min 2.4Mpa:19.0m³/min			1.0Mpa:9.0m³/min 1.8Mpa:18.0m³/min 2.4Mpa:26.0m³/min		1.0Mpa:12.0m³/min 1.8Mpa:22.0m³/min 2.4Mpa:28.0m³/min		1.0Mpa:16.0m³/min 1.8Mpa:28.0m³/min 2.4Mpa:39.0m³/min

FAQ

Q: What's your delivery time?
A: Commonly produce need 20-25 days to produce. Within 3or 5 days if in stock

Q: What methods of payment are accepted?
A: We agree T/T, L/C, West Union.

Q: What about the shipment?
A: Based on order quantity. We can send it to you by Express, by Air, by Sea, and by Train. Or send the goods to your Chinese agent.

Q: How to control the quality?
A: We should be checking & testing everyone button bit before shipment.

Q: Do you agree sample order?
A: Yes, we are welcome your sample order to testing our quality.

Q: Can we select the button bit color?
A: Yes, We color the product according to the color you need.

Q: Can we change to our mark on the button bit?
A: Yes, we can casting your company mark on the button bit. (Except sample order).

Q: Do you have after-sale service and warranty service?
A: Any quality or quantity problem once confirmed, we will reply you within 24 hours and give you a solution.

Q: Can i trust your company?