ZRC4A-DHD340 High Air Pressure without Footvalve DTH Hammers

ZRC4A-DHD340 Techinical Specifications
Length w/o bit	Weight w/o bit	Diameter	Thread	Rec. hole size
(mm)	(Kg)	(mm)
985	38	99	API 2 3/8 REG	110-135
Work pressure	Impact Frequency	Air consumption	Rec. rotation speed
(Mpa)	(Hz)	(m³/min)	(r/min)
1.0-2.5	30 at 1.7 Mpa	6-14	25-40
ZRC4A-DHD340 DTH hammer features
1．Mainly for blasting hole above 110mm, in geothermal, water well, mining and quarry etc;
2．Drill bit without footvalve, and thus avoid the trouble caused by footvalve crack, broken, thermal expansion and contraction etc.
3．Low impact power consumption, fast impact frequency, 15%-20% faster in penetration speed than same model with footvalve type;
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.

Mob.: +86 15005366588
E-mail: zhongrui@drillingmaker.com
Tel. / Fax.: +86 0536 2288189
Add.: No. 3701, Zhuangjian Road, Kuiwen Economic Development District, Weifang City, Shandong Province, China