The OD-DL-S on-line safety valve test bench adopts an advanced measurement and control concept specifically developed for in-service safety valve testing.
The system enables precise testing of safety valve opening pressure and valve core lifting behavior while the valve remains installed in the system.
A key technical innovation of this product is the introduction of two independent central processing and data acquisition modes:Cold state detection mode，Hot state detection mode
This dual-mode design allows accurate testing under different operating conditions and makes the OD-DL-S the only on-line safety valve calibration product in China capable of reliably applying both detection methods.
During testing, the system measures the pressure corresponding to different valve core opening heights, enabling evaluation of spring linearity and valve performance behavior. The testing process is fast, sensitive, safe, and highly accurate.
| Detection Mode |
Manual detection with PLC control, manual pump boosting, intelligent shortcut operation |
| Judgment Mode |
Dual judgment: online cold displacement determination & hot characteristic point determination |
| Display Mode |
Full digital display; real-time monitoring of disc displacement and lifting force with automatic result generation |
| Connection Method |
Direct series connection (no support frame required) |
| Lifting Force Range |
0–10 T |
| Applicable Valve Size |
DN15–DN600 |
| Applicable Valve Types |
Direct-acting spring safety valve; pulsating safety valve; pilot-operated safety valve; power-assisted safety valve |
| Valve Core Opening Height Range |
0.0 mm (micro-open) to 5 mm (full opening) |
| Return Function |
Automatic valve seat return |
| Core Components |
Imported hydraulic pump; German displacement sensor; Siemens PLC system |
| Working Temperature |
−20 °C to +60 °C |
| Measurement Accuracy |
≤ ±1% |
Functions and Characteristics：
- Convenient manual detection mode with PLC control and manual pump boosting
- Intelligent shortcut operation for efficient testing
- Dual-judgment open mode supporting both cold displacement and hot characteristic point determination
- Full-parameter digital display with real-time monitoring of valve flap displacement and lifting force
- Automatic generation of measurement results
- Automatic return-to-seat function after testing
- High sensitivity and rapid response suitable for on-site inspection tasks
Product Advantages：
- Compared with conventional off-line safety valve test benches, the OD-DL-S on-line safety valve calibrator offers several significant advantages:
- Enables on-line testing without dismantling the safety valve
- Reduces system downtime and maintenance workload
- Portable structure for easy transportation and on-site use
- Supports real-time evaluation of valve spring linearity
- Suitable for both cold and hot working conditions
- High cost-performance ratio for industrial inspection applications
These advantages make the OD-DL-S particularly suitable for routine inspection and periodic verification of safety valves in operating systems.
System Configuration & Core Components：
The core configuration of the OD-DL-S on-line safety valve calibrator includes
- Imported hydraulic pump for stable lifting force output
- High-precision displacement sensor from Germany
- PLC control system with technical and product support from Siemens AG, Germany
- Integrated data acquisition and processing unit
- Portable mechanical structure designed for on-site operation
The combination of high-quality components and optimized system architecture ensures long-term reliability and consistent testing accuracy.
Our Manufacturing Strength:
As a professional manufacturer specializing in pressure testing and safety valve inspection equipment, we provide:
- Over 14 years of focused experience in pressure testing and calibration equipment
- Independent R&D capability for testing systems and control technology
- Stable production capacity with strict quality control procedures
- ISO9001 certified quality management system
- Products exported to Europe, North America, South America, and other international markets
- Long-term technical support for both standard and customized equipment
