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DK Series Piston Pressure Gauge: High-Precision Modular Pressure Metrology Standard Solution
In the field of pressure metrology and instrument calibration, the piston pressure gauge, as a metrological standard based on the principle of gravity balance, has extremely high accuracy and long-term stability. It is an important device for metrology institutions, laboratories, and industrial sites to calibrate pressure gauges, pressure transmitters, differential pressure transmitters, and pressure sensors. The Nexisense DK series piston pressure gauge is a redesigned and structurally optimized version based on the original YS, KY, and JY series, achieving a highest accuracy of 0.005%, with a range up to 160MPa. It adopts a fully modular design, providing economical, practical, and highly reliable pressure calibration solutions for B2B metrology purchasers and system integrators.
Product Core Technical Features
The DK series piston pressure gauge adopts a modular structure. Both the piston system and the pressure generator are modularized, and various modules can work independently or be flexibly combined, significantly improving the versatility and economy of the equipment. A single basic platform can meet multi-range calibration needs by replacing different piston systems, reducing the user's overall ownership cost.
The main performance features include:
Modular Design: Fully modular piston system and pressure generator, which can be used singly or in combination, adapting to different calibration scenarios.
High Stability: The liquid piston adopts a low-position weight design with a lower center of gravity, resulting in smoother rotation and ensuring high reliability and measurement stability.
Excellent Interchangeability: Piston ranges are realized by replacing cylinder units, enabling arbitrary interchange and convenient on-site maintenance.
Material Advantages: The piston-cylinder unit is made of tungsten carbide material, and other key components are made of high-quality austenitic stainless steel, effectively avoiding deformation and wear.
Weight Optimization: Uses demagnetized high-quality austenitic stainless steel weights to reduce magnetic interference.
Precision Performance: Uniform rotation speed decay (for example, in a 60MPa product, the speed drops from 33.0 rpm to 24.8 rpm after 30 minutes), proving uniform pressure distribution in the piston-cylinder gap; the piston descent speed has a linear relationship with pressure, with a maximum descent speed of less than 5μm/s, and extremely small change in effective area (less than 0.0006mm).
Effective Area Characteristics: Under standard atmospheric pressure and 20℃ conditions, the average effective area and pressure deformation coefficient can be accurately measured by a reference pressure gauge.
These designs ensure that the DK series maintains extremely high repeatability and long-term stability across the full range, making it particularly suitable as a pressure metrology standard at the 0.005% accuracy level.
Instrument Structure and Operation Advantages
The DK series adopts hard-seal technology in the pressurization system, completely independent of O-ring or cup seal, fundamentally eliminating leakage risks and eliminating the need for frequent seal replacement or disassembly maintenance. This design reflects a high level of machining technology. The pre-pressurization process does not require valve control, further simplifying the operation process.
The pressurization rod is delicately designed, allowing easy pressurization up to 100MPa with one hand, significantly reducing the labor intensity of operators. The piston cylinder and piston rod are processed by German high-precision lathes without manual lapping, avoiding problems such as inconsistent descent speed or unqualified delay.
The low-position piston structure lowers the center of gravity of the equipment, making piston rotation smoother and improving the reliability of the overall measurement process. The DK series with local display or standard configuration is easy to operate, suitable for daily use in metrology laboratories, and also convenient for portable calibration operations in industrial sites.
Typical Application Scenarios
The DK series piston pressure gauge is widely used in fields requiring high-precision pressure standard traceability.
In metrology institutes and calibration laboratories, it serves as a primary or secondary standard for calibrating precision pressure gauges, digital pressure gauges, pressure transmitters, and sensors, ensuring the accuracy and traceability of metrological results. The modular feature allows one device to cover multiple ranges, optimizing laboratory equipment configuration.
In petrochemical and high-pressure process control projects, the product is suitable for periodic calibration of pressure instruments in high-pressure pipelines, reaction kettles, and storage tanks. The 160MPa range covers most industrial high-pressure application scenarios.
In high-precision pressure testing systems in industries such as aerospace, power, and automobile manufacturing, the DK series can be used as a reference device for periodic verification of pressure instruments used on site, ensuring safe operation and product quality control.
In addition, in the factory calibration process of third-party testing institutions and instrument manufacturing enterprises, the modular design supports efficient batch calibration, significantly improving production and quality inspection efficiency. In actual metrology projects, many units have adopted the DK series to replace traditional equipment, achieving higher calibration accuracy and lower maintenance costs.
Selection Guide
To match specific calibration needs, purchasers can refer to the following points for selection:
Accuracy and range selection: Highest accuracy 0.005%. Select the appropriate range (maximum 160MPa) according to the accuracy grade and working pressure range of the instrument under calibration, and reserve a certain margin.
Modular configuration: Combine different piston systems and pressure generator modules according to daily calibration tasks to achieve multi-purpose use with one machine and reduce procurement costs.
Environmental adaptability: Evaluate laboratory or on-site temperature and humidity conditions, and select high-wear-resistant material configurations such as tungsten carbide to ensure long-term stable operation.
Operation requirements: For high-frequency calibration occasions, prioritize hard-seal and easy pressurization design; for projects with high portability requirements, evaluate the overall weight and structure of the equipment.
Supporting accessories: Confirm weight sets, connectors, and effective area parameters under standard atmospheric pressure conditions. Calibration certificates can be requested if necessary.
Before purchase, provide calibration object parameters (type of instrument under calibration, range, accuracy requirements, usage environment, etc.), and the technical team can recommend the optimal module combination solution.
Integration and Usage Precautions
As an independent metrological standard, the DK series is relatively simple to use, but to ensure the accuracy of measurement results, the following engineering points should still be noted:
Installation and Environmental Control: The equipment should be placed on a level, vibration-free workbench, with ambient temperature controlled at around 20℃±2℃, avoiding direct sunlight or airflow interference.
Operation Specifications: Follow the requirements of the hard-seal system during pressurization, slowly rotate the piston to a stable speed, and observe whether the descent speed is linear. Check the cleanliness of weights and the piston-cylinder gap before use.
Maintenance Points: The hard-seal design reduces routine maintenance, but regularly check piston rotation and effective area changes. Ensure interface sealing is reliable when replacing modules.
Traceability and Verification: Regularly send to higher-level metrology institutions for re-inspection of effective area and deformation coefficient to ensure the equipment remains in standard condition.
Safety Operation: Strictly follow operating procedures when using high-pressure ranges to avoid overpressure; although tungsten carbide components are wear-resistant, handle them with care to prevent collisions.
For users integrating into automated calibration systems, software can be combined to record descent speed, rotation speed, and pressure values to achieve automatic data acquisition and report generation.
OEM Customization and Bulk Supply Advantages
Nexisense supports OEM/ODM cooperation for metrology institutions, instrument manufacturers, and engineering companies. The DK series can customize specific range combinations, module configurations, weight sets, and appearance identification according to requirements to meet different standard procedures or project bidding needs.
Bulk supply can provide stable delivery, cost optimization solutions, and technical training services. The company has accumulated rich experience in the field of piston pressure gauges and can cooperate with customers throughout the process from structural optimization to material selection, providing complete solutions from single laboratory equipment to batch production calibration lines.
FAQ
1. What is the highest accuracy and maximum range of the Nexisense DK series piston pressure gauge?
A: The highest accuracy reaches 0.005%, and the maximum range can reach 160MPa, meeting most high-pressure precision calibration needs.
2. How does the modular design help users reduce costs?
A: A single basic platform can install different piston systems and pressure generator modules to achieve multi-range sharing, reducing the number of equipment purchases and improving economy.
3. What are the advantages of the tungsten carbide piston-cylinder unit?
A: Tungsten carbide material has super wear resistance, effectively avoiding deformation, ensuring uniform pressure distribution in the piston-cylinder gap, and maintaining high stability for a long time.
4. What is the difference between the hard-seal pressurization system and traditional O-ring sealing?
A: Hard sealing does not require replacement of cups or O-rings, fundamentally eliminating leakage problems. Pressurization is easy and maintenance is extremely low.
5. How do piston descent speed and rotation speed affect measurement accuracy?
A: The descent speed has a linear relationship with pressure, with a maximum of less than 5μm/s; uniform rotation speed decay indicates good gap pressure distribution, directly ensuring measurement repeatability and accuracy.
6. For which instruments under calibration is the DK series suitable?
A: Suitable for high-precision calibration of various instruments such as precision pressure gauges, pressure transmitters, differential pressure transmitters, pressure sensors, and digital pressure gauges.
7. What operational points should be paid special attention to when using on site?
A: Keep the equipment level, control the ambient temperature, pressurize slowly and observe the stable state of the piston; strictly follow safety procedures during high-pressure operation.
8. Does it support OEM customization and bulk procurement?
A: Supports customization services for range, modules, materials, and identification. Bulk supply can provide stable delivery, technical support, and cost advantages.
Summary
The Nexisense DK series piston pressure gauge, with its core advantages of 0.005% high precision, 160MPa wide range, and modular structure, combined with tungsten carbide wear-resistant materials, hard-seal pressurization system, and low-position stable design, provides a highly reliable and practical standard solution for pressure metrology and instrument calibration. Its optimized structure and convenient operation characteristics effectively reduce maintenance costs and operation difficulty, and have become a trusted choice in metrology laboratories and industrial calibration fields.
As a professional pressure metrology equipment supplier, we look forward to in-depth cooperation with metrology institutions, instrument enterprises, and engineering project parties to jointly improve pressure traceability and calibration levels. If you are planning laboratory equipment upgrades, batch calibration system construction, or specific range customization needs, please feel free to contact the Nexisense technical team, provide calibration working condition details, and we will provide targeted selection suggestions, technical solutions, and bulk cooperation support.
