Changsha ENYU Engineering Equipments Co. Ltd.
Changsha ENYU Engineering Equipments Co. Ltd.
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DHD3.5 DTH Hammers And Bits With Foot Valve , High Performance Dth Drilling Tools
Introduction:
DHD3.5 dth hammer is a kind of valveless down-the-hole hammer, designed to efficiently operate at high air pressures.
Technical data:
| Length (less bit) | Weight(less bit) | External diameter | Bit shank | Hole range | Connection thread | ||
| 930mm | 25.00kg | ∅82mm | DHD3.5 | ∅90-∅110 | API 2 3/8" Reg | ||
| Working Pressure | Impact rate at 1.4 Mpa | Recommended rotation speed | Air consumption | ||||
| 1Mpa | 1.5Mpa | ||||||
| 1-1.5Mpa | 28HZ | 25-40r/min | 4.5 m³/min | 9.0m³/min | |||
Feature:
1. Valveless air distribution. More reliable
2. The operating air pressures are between 1Mpa and 1.5Mpa
3. Simple design of the piston, long life
4. More efficient energy transfer faster drilling speed, lower air consumption and lower oil consumption
