Universal Maintenance Tool for High-Pressure Accumulator Systems
Accumulator gas pre-charge pressure is vital to hydraulic system stability, energy recovery, and equipment protection. Operating an accumulator with under-charged or depleted nitrogen results in bladder crushing, piston collision against end caps, extreme hydraulic shock, and catastrophic component failure. The SCHWERLL CQJ universal charging tool kit allows maintenance technicians and service engineers to safely inspect, adjust, and replenish nitrogen gas pre-charge across all accumulator brands (including SCHWERLL, Hydac, Parker, Bosch Rexroth, Olaer, and standard ASME/CE models).
Key Engineering Features
- Multi-National Thread Adapters: Includes precision CNC-machined brass and stainless steel adapters: 5/8″-18UNF (US standard), 7/8″-14UNF (high-pressure standard), G5/8″ (European ISO 228), M14×1.5, and M28×1.5 for direct connection to industrial nitrogen gas cylinders and accumulator gas valves.
- Dual-Scale Shockproof Gauges: Fitted with two glycerin-filled stainless steel pressure gauges (0–10 MPa / 0–1,500 PSI for low-pressure precision tuning, and 0–40 MPa / 0–6,000 PSI for high-pressure industrial systems).
- Micro-Metering Bleed Valve: Built-in stainless needle valve allows precision micro-venting to achieve exact pre-charge target pressures within ±0.1 bar accuracy without overshoot.
- Burst-Resistant Hose Assembly: Heavy-duty DN4 high-pressure thermoplastic micro-bore hose with double stainless steel wire braid, rated to 63 MPa (9,100 PSI) working pressure and 160 MPa burst pressure.
- Heavy-Duty Transit Case: High-impact ABS protective case with custom high-density EVA foam cutouts to protect precision instruments during tough industrial site transport.
Technical Specifications
| Parameter | Specification / Metric Value | Imperial Equivalent |
|---|---|---|
| Model Code | CQJ-40-U (Universal Multi-Standard) | Universal Industrial Kit |
| Maximum Working Pressure | 40 MPa (400 bar) | 5,800 PSI |
| Proof Test Pressure | 60 MPa (600 bar) | 8,700 PSI |
| Dual Gauge Ranges | 0–10 MPa (Class 1.6) & 0–40 MPa (Class 1.6) | 0–1,500 PSI & 0–6,000 PSI |
| Pressure Gauges Type | 63 mm Glycerin-Filled Stainless Steel Case | 2.5″ Dial, Bottom Mount |
| Standard Hose Length | 3.0 Meters (Custom 5m / 10m available) | 9.84 Feet |
| Hose Max Rating | 63 MPa WP / 160 MPa Burst | 9,130 PSI WP / 23,200 PSI Burst |
| Gas Adapter Standards | 5/8″-18UNF, 7/8″-14UNF, G5/8″, M14x1.5, M28x1.5 | Compatible with ASME, DIN, ISO, GB |
| Operating Temperature | -20°C to +80°C | -4°F to +176°F |
| Case Dimensions & Weight | 380 × 300 × 120 mm / 3.8 kg | 15.0″ × 11.8″ × 4.7″ / 8.4 lbs |
