ZRC5A-DHD350 High Air Pressure without Footvalve DTH Hammers

ZRC5A-DHD350 Techinical Specifications
Length w/o bit	Weight w/o bit	Diameter	Thread	Rec. hole size
(mm)	(Kg)	(mm)
1105	67	126	API 2 3/8 REG	135-155
			API 2 3/8 IF
			API 3 1/2 REG
Work pressure	Impact Frequency	Air consumption	Rec. rotation speed
(Mpa)	(Hz)	(m³/min)	(r/min)
1.0-2.5	28 at 1.7 Mpa	7-19	20-35
ZRC5A-DHD350 DTH hammer features
1．Mainly for blasting hole above 135mm, in geothermal, water well, mining and quarry etc;
2．Adpot more realiable air distribution method, Valvess type air distribution;
3．Simple parts, more wear-resistence;
4．Low air consumption, energy saving, saving more than 10% oil than same model with footvalve type;
5．Simple structure, easy maintance; highly matched parts, more realiable, low faliure rate; low disamble rate, long service life, low operating cost, very steady in performance.

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E-mail: zhongrui@drillingmaker.com
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