As a pillar industry of the national economy, petrochemicals involve complex working conditions such as high temperature and high pressure, strong corrosion, a wide viscosity range, and flammability and explosiveness. The stability, precision and safety of fluid transfer equipment directly determine production efficiency, product quality and the bottom line of safe production. In segmented scenarios such as fine chemicals, specialty chemicals, chemical pilot/semi-pilot tests, SCR tail gas treatment and additive dosing, there is a growing demand for pump equipment with precise micro-volume transfer, low leakage, high pressure difference and high corrosion resistance. However, traditional pump types struggle to adapt to these high-end working conditions due to structural limitations.

Boasting core technical advantages including full flow coverage, leak-free magnetic drive, pulse-free precision metering and a corrosion-resistant material system, the JONSN series of precision micro gear pumps effectively addresses many pain points of traditional pumps under complex petrochemical working conditions. It provides stable and reliable fluid solutions for key scenarios such as additive injection, pilot plants, sampling systems and waste heat recovery.

I. Five Core Demands of the Petrochemical Industry

II. Pain Points of Traditional Pump Solutions

Centrifugal pumps and screw pumps, commonly used in the petrochemical industry, have obvious shortcomings in precision transfer, high-pressure corrosion resistance and stable operation due to their structural principles. The advantages of JONSN precision gear pumps are clearly visible when compared with traditional solutions:

     Core Pain Point Breakdown

· Persistent Leakage Hazards: Mechanical seals or reciprocating dynamic seals easily fail under high pressure differences and corrosive media, and even minor leaks can trigger safety accidents.

· Flow Pulsation Impairs Process Consistency: Pulsed output from plunger pumps causes additive ratio deviations, affecting final product quality.

· Lack of Suitable Solutions for Small Flow Scenarios: Petrochemical pilot plants and micro-dosing systems have long lacked high-precision, high-pressure difference small-flow pumps, forcing the use of large pumps with throttling, resulting in high energy consumption and difficult control.

· Frequent Maintenance and High Downtime Losses: Traditional pumps have many wearing parts, requiring maintenance and replacement every 3-6 months in commercial applications, directly increasing operating costs and production interruption risks.

III. JONSN Series Precision Micro Gear Pumps: Six Core Technological Breakthroughs

Precise and Pulsation-Free Flow: Flow range of 1 ml/min to 67 L/min with wide linear adjustment for single pumps. The gear meshing structure eliminates pulsation, delivering flow accuracy of ±0.5%. Paired with stepper/servo motors, it ensures high repeat accuracy, suitable for various micro-precision dosing scenarios.

Stable Pressure with Small Fluctuations: Optimized gear clearance combined with magnetic drive design enables the pump head to withstand a maximum pressure of 6 MPa, with a working pressure difference of 0.5-25 bar (0.5-14.5 bar for the MRF series) and pressure fluctuations ≤±0.2 bar. Equipped with variable frequency motors, it adapts to pipeline resistance and maintains constant pressure for high-pressure reaction processes.

Magnetic Drive for Zero Leakage: A fully enclosed magnetic coupling structure eliminates dynamic seal leakage. It is ideal for transferring flammable, explosive, toxic and valuable media, ensuring safer use.

Durable Materials for Wide Adaptability: Standard 316L stainless steel with optional Hastelloy C-276. It accommodates media with a viscosity of 0.4-3000 mPa·s, stably transporting acids, alkalis, resins, chemical auxiliaries and other petrochemical materials.

Long Service Life and Low Maintenance: Core components adopt hard alloy wear-resistant materials with no vulnerable parts. With a continuous service life exceeding 20,000 hours, it outperforms plunger pumps and diaphragm pumps, significantly reducing maintenance costs.

Flexible Adaptation and Easy Integration: Compatible with various standard/explosion-proof motors, supporting communication protocols such as 4-20mA, RS485 and CAN. It can be integrated into DCS and PLC systems for remote control and intelligent monitoring.

IV. Field Application Verification: A Reliable Choice for Key Petrochemical Links

Application Case 1: Large-Scale Refining and Chemical Enterprise in East China – Precision Additive Injection System

The enterprise’s hydrogenation unit required continuous injection of micro-volume antiscalant into the reactor, previously using plunger metering pumps. Operational issues included flow pulsation causing injection concentration fluctuations of ±8% (impairing catalyst activity) and plunger seal leakage every 3 months (posing safety hazards). After switching to JONSN MRB series gear pumps (flow rate: 400-4800 ml/min, 316L pump head + explosion-proof motor):

· Flow accuracy improved to ±0.5% with pulse-free output, greatly enhancing injection concentration stability;

· No dynamic seal leakage occurred after 18 months of continuous operation;

· Pressure fluctuations remained consistently within ±0.2 bar, ensuring stable unit operation.

Application Case 2: Fine Chemical Research Institute – Universal Platform for Pilot/Semi-Pilot Plants

The institute operates multiple pilot and semi-pilot plants handling media such as methanol, ethylene glycol and phenolic resin, with flow requirements ranging from 5 ml/min to 30 L/min. Previously, multiple pumps of different principles (diaphragm pumps, peristaltic pumps, centrifugal pumps) were used, leading to cumbersome management and inconsistent accuracy. After introducing JONSN MPG008 (15-280 ml/min), MRA (100-2000 ml/min) and MRC (0.8-14 L/min) series pumps:

· One family of gear pumps covers the entire flow range, with quick replacement of 316L and Hastelloy pump heads;

· Measured flow linearity R² > 0.999 under rated flow rates, and pulse-free performance ensures pilot test reproducibility;

· Compact pump body facilitates bench integration. The institute has designated JONSN gear pumps as the standard selection for new semi-pilot plant

In addition, JONSN products are widely used in other scenarios: online sampling systems in petrochemical laboratories, high-pressure feeding for catalyst activation units, urea solution metering for desulfurization and denitrification, and precise dosing of auxiliaries for polymer polymerization, all receiving positive feedback.

V. Future Outlook: Empowering High-Quality Petrochemical Development with Precision Fluid Technology

As the petrochemical industry raises increasingly stringent requirements for the accuracy, stability, safety and intelligence of fluid transfer, precision micro gear pumps have become a core competitive advantage in refining units, pilot platforms and fine chemical processes. Adhering to the philosophy of "devoting ourselves to crafting every precision gear pump with care and focus", JONSN is equipped with professional equipment for gear hobbing, gear grinding, CNC machining and comprehensive testing. Certified by the German  ISO 9001:2015 Quality Management System, it implements a "one item, one code" full-process traceability system, strictly controlling quality from raw materials to finished products and ensuring exceptional reliability and consistency for every gear pump delivered.

In the future, JONSN will focus on precision fluid transfer, continuously upgrade products and expand applications across all petrochemical scenarios. It will prioritize the development of high-temperature and high-pressure special pumps, combined with intelligent operation and maintenance technology to provide full-process services, empowering petrochemical enterprises with reliable fluid solutions and driving the green, safe and efficient development of the industry.