Product Detail Content
1) Design Goal: Remove the "Foot Valve Bottleneck"
In high-pressure pneumatic drilling, the foot valve can become a reliability bottleneck. ND/QL Valveless is purpose-built to: eliminate the valve-related risk points, keep airflow timing stable, support efficient flushing in abrasive formations.
2) Air System & Impact Behavior
This series is engineered for: Higher impact frequency at lower air consumption, improving output per compressor capacity.
A valveless distribution approach that simplifies airflow control and reduces failure modes.
3) Build Quality: Materials + Heat Hardening
ND/QL Valveless emphasizes: alloy-steel body and wear components for fatigue resistance, heat-hardened spare parts to extend service life under continuous impacts, precision-machined threads and sealing interfaces to reduce leakage and ease service.
4) Service-Friendly Threaded Connections
Thread connections on top sub and drive chuck are engineered to simplify disassembly: faster teardown, reduced risk of damaged interfaces during maintenance, easier field servicing.
5) Field Case Example: Open-Pit Blast Hole Program
An open-pit operation drilling blast holes in abrasive rock experienced repeated downtime linked to valve failures and maintenance complexity. After switching to ND/QL Valveless hammers with no-foot-valve bits, the team reported: fewer unplanned stops tied to valve issues, steadier hole cleaning and penetration in abrasive intervals, faster servicing due to threaded teardown and reduced internal parts
Result: better daily meterage consistency and improved operational predictability.
FAQ
Q1: Is ND/QL Valveless compatible with common rigs/compressors?
A1: It is a pneumatic high-pressure hammer; matching air pressure/volume to hammer size is essential. We provide selection guidance.
Q2: What is the main difference vs foot-valve hammers?
A2: No-foot-valve bit compatibility and reduced valve-related failures, plus simplified servicing.
