To support expanding global OEM demand, Boxinhuasheng Hydraulic Technology Co., Ltd. has expanded its 68,000m² manufacturing campus with 30 new automated CNC testing benches and high-precision diamond honing cells.
Figure 1: Boxinhuasheng 68,000m² manufacturing campus encompassing 4 modern production facilities in Qingzhou, China.
1. Enhancing Machining Precision & Diamond Honing Capacity
Our facility expansion features new automated diamond honing centers. Spool bore diameter control is critical; a clearance that is too loose increases internal oil bypass, reducing volumetric efficiency. A clearance that is too tight can cause spool sticking due to thermal expansion. The new honing lines utilize multi-stone diamond tooling to control bore diameter and roundness within 0.002 mm (2 microns), maintaining consistent oil film lubrication and ensuring reliable operation under heavy duty cycles.
2. Integrated Production and Automated Cleaning
The manufacturing process is managed end-to-end inside our 4 modern plants. After CNC machining and honing, components pass through a 5-stage automated ultrasonic cleaning line. This process removes all metallurgical dust, sand, and honing residue, meeting ISO 4406 fluid cleanliness standards and preventing premature system wear.
Figure 2: Automated testing bench room conducting 100% workload simulation testing for internal leakage and proof pressure.
3. 100% Workload Simulation Testing Mandate
Quality assurance is backed by 30 new automated testing benches. Rather than random batch testing, 100% of finished directional control valves, gear pumps, and PTO units undergo dynamic workload simulation tests. The test protocol checks: - Main relief valve opening threshold and pressure-flow characteristics. - Spool leakage under peak pressure (31.5 MPa). - Volumetric efficiency of gear pumps under load. - Shifting and engagement response of pneumatic and mechanical PTO units. All test data is saved in our quality system database, providing lot-code traceability for OEM contracts.
4. Certifications & Global OEM Supply Reliability
Established in 2001, Boxinhuasheng is certified under IATF 16949 standards and is an SGS-verified manufacturer. Producing over 1.5 million hydraulic units annually, we supply Tier-1 machinery builders and commercial vehicle bodybuilders in 80+ countries with high supply chain reliability.
