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In industries such as valve manufacturing, pressure vessel production, petrochemical plant maintenance, and power system overhaul, conducting accurate and reliable pressure tests on valves and safety valves is a core step to ensure the safe operation of equipment and prevent leakage accidents. Traditional manual testing methods are not only inefficient and labor - intensive but also have many pain points, such as inaccurate pressure control, incomplete data recording, and high safety risks. They are difficult to meet the strict requirements of modern industry for standardized testing processes and traceable data. Especially when dealing with high - pressure, large - diameter, or special - medium working conditions, the lack of professional and efficient testing equipment often becomes a bottleneck for project progress and product quality.
In response to these industry challenges, Shanghai Luoji Pump Industry Co., Ltd., with years of in - depth cultivation and manufacturing experience in the pump product field, combines precision mechanical design with fluid control technology and launches professional - grade valve pressure test pumps and safety valve pressure calibration platform solutions. Our company has a registered capital of 10 million yuan and focuses on the processing and manufacturing of the pump industry. Our product line covers various types such as pressure test pumps, chemical pumps, and metering pumps. We deeply understand the testing needs in different industrial scenarios and are committed to providing customers with high - precision pressure testing equipment from standard models to fully customized ones through technological improvement. Our products aim to solve the control problems in the pressure testing process, improve testing efficiency and safety, and ensure that each calibration is accurate and reliable.
1. Product working mechanism and core features
The core working mechanism of this series of valve pressure test pumps and safety valve pressure calibration platforms is to pressurize low - pressure liquid (usually clean water or hydraulic oil) to a preset high - pressure state through electric or manual driving methods and stably output it to the cavity of the valve or safety valve to be tested, simulating its actual working pressure conditions, so as to test its sealing performance, opening pressure, reseating pressure, and overall strength.
- High - precision pressure control and display: The equipment is equipped with a precision pressure gauge or digital pressure controller with high resolution and accurate indication. It can monitor and precisely control the rising and falling process of the test pressure in real - time to ensure the reliability of the test results.
- Stable pressure output and pressure - holding performance: High - quality plunger pumps or booster pump heads are used, combined with precision pressure regulating valves and pressure stabilizing devices, which can achieve a smooth establishment of pressure and long - term stable maintenance without pressure fluctuation or attenuation, meeting the pressure - holding test duration required by the standards.
- Multiple safety protection designs: The system integrates devices such as safety valves (relief valves), pressure relief valves, and overload protection. When the system pressure exceeds the set safety value, it will automatically relieve pressure, effectively protecting the safety of operators and the equipment itself and preventing over - pressure accidents.
- Flexible configuration and connection: It offers a variety of pressure ranges, flow specifications, and interface forms (such as threads and flanges), which can be selected according to the caliber, pressure rating, and test standards of the valve to be measured, with strong versatility.
- User-friendly operation and maintenance: The structure design is compact and reasonable. The operation handles and control valves are arranged in line with ergonomics, facilitating operation. The key components are easy to disassemble and maintain, reducing the long-term use cost of the equipment.
II. Technical specifications and parameter details
The following table lists the key technical parameters of some standard models. The specific specifications can be customized non-standardly according to customer requirements.
| Parameter item | Parameter range/description | Remarks |
|---|---|---|
| Rated working pressure | 0 - 10 MPa, 0 - 25 MPa, 0 - 40 MPa, 0 - 60 MPa | Higher pressure ratings can be customized according to requirements |
| Drive power (electric type) | 0.75 kW, 1.5 kW, 2.2 kW, 3 kW | Match different flow and pressure requirements |
| Flow output (electric type) | 0.5 - 3.0 L/min (at low pressure), the flow decreases at high pressure | The flow is inversely proportional to the pressure, suitable for precise pressurization |
| Accuracy of pressure gauge | Class 1.6 or higher precision digital display gauge (optional) | Ensure the accuracy of test data |
| Test medium | Clean water, hydraulic oil, or other compatible liquids specified by the user | The characteristics of the medium need to be specified in advance |
| Interface size | G1/2", G3/4", 1" NPT, or customized flange standards | Compatible with various valve interfaces |
| Equipment weight (approx.) | 50 - 150 kg (depending on the model) | Mobile or bench - type design |
III. Core Advantages of the Product
- Accurate calibration, reliable data: The high - precision pressure measurement system ensures the calibration accuracy of key parameters such as the opening pressure and reseating pressure of the safety valve, meeting the requirements of relevant domestic and international standards such as ASME and GB/T, and providing data support for equipment safety.
- High - efficiency and labor - saving, improving production capacity: Compared with pure manual pumps, the electric - driven models significantly reduce the labor intensity of operators. They have a fast pressure - boosting speed and stable pressure - holding performance, significantly shortening the testing time of a single valve and improving the overall efficiency of the production line or inspection station.
- Sturdy and durable, long - term stability: The core pressure - bearing components such as the pump body and cylinder are made of high - quality alloy steel or stainless steel materials. After precision machining and heat treatment, they have high pressure - resistance strength and good anti - fatigue performance, ensuring the long - term stable operation of the equipment under frequent high - pressure tests.
- Widely applicable, multi - purpose: It is not only suitable for the calibration of safety valves and relief valves, but also can be used for the sealing test and strength test of various valves such as gate valves, globe valves, ball valves, and plug valves. It is an ideal equipment for valve manufacturers, quality inspection units, and maintenance workshops.
- Comprehensive customized services: For non - standard requirements such as special pressure ranges, ultra - large flow rates, explosion - proof environments, corrosive media, and automation integration (such as connecting to PLC and data acquisition systems), Shanghai Luoji Pump Industry Co., Ltd. provides full - process customized services from design, manufacturing to commissioning, effectively solving customers' personalized problems.
As an enterprise with a registered capital of 10 million yuan and focusing on pump manufacturing, Shanghai Luoji Pump Industry Co., Ltd. is well aware that product quality is the cornerstone of winning customers' trust. Our products, with superior performance and excellent quality, have successfully served many enterprises and institutions in the fields of engineering supporting, industrial manufacturing, civil construction, and petrochemical, power, pharmaceutical industries, etc., and have won wide recognition. This recognition comes from our strict control of every production process, from raw material screening to precision machining, from assembly and commissioning to factory inspection. We follow an internal control process higher than the industry standard.
By choosing our valve pressure test pumps and safety valve calibration stations, you're not just getting a piece of equipment; you're getting a reliable pressure testing solution and a long - term technical support partner. We are committed to user service and aim to meet customer requirements. Whether you have standard pressure testing needs or face special testing challenges that existing equipment can't handle, our technical team is happy to provide professional advice and customized solutions. We firmly believe that through in - depth communication about your specific application scenarios and testing standards, we can jointly determine the most economical, efficient, and safe equipment configuration. Feel free to contact us at any time to discuss your pressure testing needs. Let our enthusiasm and professional service help you take your product quality and safe production to the next level.
FAQ (Frequently Asked Questions)
1. Q: When testing safety valves with this equipment, how can the accuracy of the opening pressure calibration be ensured?
A: The equipment is equipped with high - precision pressure gauges or digital displays, and the opening point of the safety valve can be slowly approached through a precision pressure regulating valve. For higher requirements, it can be upgraded to a system with data acquisition function to record the pressure - time curve in real - time and accurately determine the pressure value at the moment of opening, ensuring that the calibration results meet the requirements of ASME or GB/T standards.
2. Q: We need to test the sealing performance of large - diameter high - pressure gate valves. Is the flow rate sufficient?
A: For large - diameter valves with large cavity volumes, we can customize a pump set with a higher flow rate based on the standard model, or add an accumulator/booster cylinder to the system to shorten the filling time. The key is to clarify your valve diameter, test pressure, and required pressure - rising time, and we will recommend or design a suitable solution accordingly.
3. Q: Does the equipment support the use of test media other than clean water, such as oils?
A: Yes, it does. However, you need to clearly inform us of the type of medium (such as hydraulic oil, engine oil, etc.) before placing an order. Different media may require the replacement of the pump's sealing materials (such as O - rings and seals) for compatibility, and there are corresponding requirements for the system cleanliness. We will make adaptive adjustments to the equipment according to the characteristics of the medium.
4. Q: What aspects are usually included in non - standard customization? What are the customization cycle and cost?
A: Non - standard customization includes expanding the pressure range, special flow requirements, configuring explosion - proof motors, using special materials (such as all - stainless - steel corrosion - resistant), changing the interface form, and integrating automatic control (such as PLC, remote control), etc. The customization cycle and cost depend on the specific scope of changes. Generally, a detailed quotation and construction period will be provided after the technical solution is determined. We are committed to providing cost - effective customization solutions while meeting the functional requirements.
5. Question: If the equipment undergoes high-pressure testing for a long time, what are the service life and maintenance cycle of its key components?
Answer: The core pressure-bearing components such as plungers and cylinders are made of high-strength materials and heat-treated, with a long design life. Regular maintenance mainly focuses on the replacement of seals, filtration/replacement of hydraulic oil (if used), and inspection of the fastening of connecting parts. We will provide a detailed operation and maintenance manual and can give a recommended preventive maintenance plan based on the usage frequency. Spare parts are in sufficient supply.
6. Question: How should I choose between the electric type and the manual type?
Answer: The electric type is suitable for occasions with high testing frequency, high pressure requirements, and a pursuit of efficiency, such as valve production lines and professional inspection institutions. The manual type is more suitable for occasions with a small testing volume, no power supply on-site, or a limited budget, but the labor intensity of the operator is relatively high. We can recommend the most suitable type according to your budget and actual usage scenario.
7. Question: What are the safety protection measures of the equipment? How to prevent overpressure?
Answer: The standard configuration includes a system safety valve (relief valve), which can set the maximum safety pressure; a bursting disc may be installed in the pipeline as a secondary protection; the electric model may be equipped with a pressure sensor and electrical overload protection. During operation, we strongly recommend installing an independently calibrated pressure gauge in the system in addition to the equipment for double monitoring and following the safety operating procedures.
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