As a professional manufacturing enterprise deeply engaged in the field of chemical pumps,  Anhui Wolong Pump and Valve Co., Ltd. has always been committed to optimizing product structure design and sealing systems with years of mature technology accumulation in the field of fluid transportation. We use high-strength and corrosion-resistant special materials, combined with precise and rigorous assembly processes, to ensure that every chemical pump can maintain long-term, stable, and efficient operation even under harsh working conditions such as high temperature, high pressure, and strong corrosiveness. Our product line covers various styles such as fluoroplastic-pump，stainless-steel-pump，centrifugal-pump，magnetic-pump，self-priming pumps, etc., which can meet the diverse needs of different chemical processes and provide customers with reliable professional solutions.

In addition to excellent product performance, we also value the full lifecycle user experience of our customers. We optimize the structural design to make equipment maintenance more convenient in the later stage. At the same time, relying on a sound supply chain system, we ensure timely and accurate matching of core components such as pump shafts, impellers, mechanical seals, and liners, greatly reducing production interruptions and maintenance pressure caused by equipment downtime in chemical enterprises. Choosing Wolong Pump Valve is not only about choosing a high-quality chemical process pump, but also about choosing a worry free and reliable long-term partnership. With our professional technology andproducts, we can safeguard your safe production and efficient operation.

our chemical pumps are undoubtedly the ideal choice for your production process. Anhui Wolong Pump and Valve Co., Ltd. has been deeply involved in the field of chemical pump manufacturing for many years, always placing quality first. From precision machining of core components to strict control of overall assembly, we strive for excellence and meticulousness in every aspect. We are well aware of the unique requirements of different chemical processes for pump equipment. Therefore, we not only provide standardized products, but also focus on providing professional customized selection suggestions to ensure that each pump can be accurately matched with your specific production process, becoming a reliable and efficient part of the system.

Our chemical pumps are designed with full consideration for the challenges of complex working conditions, and possess excellent anti clogging and corrosion resistance, capable of handling a variety of harsh media and production environments with ease. During operation, the equipment performs stably and has a low failure rate, which can significantly reduce maintenance downtime and effectively help you improve overall production efficiency and reduce operating costs. Choosing us means choosing continuous and reliable power support and trustworthy professional guarantee.

In chemical production, frequent maintenance of equipment and slow after-sales response often lead to production interruptions and cost increases, which are often caused by the materials of pump and valve products being non corrosion-resistant, poor adaptability, or lengthy supply chains. As a leading factory in the field of chemical pumps, Anhui Wolong Pump Valve Co., Ltd. has fundamentally resolved this pain point through independently developed corrosion-resistant chemical pumps and customized chemical pump valve solutions. The product adopts high-performance materials and optimized design, demonstrating excellent stability against various complex media such as acids, alkalis, and organic solvents. It significantly reduces the failure rate caused by corrosion or wear, significantly shortens downtime for maintenance, and ensures continuous and efficient production operation.

In specific application scenarios, such as in the petrochemical industry, pesticide formulation production, or salt chemical evaporation cycle, the corrosion-resistant chemical pump of Wolong Pump Valve, with its dual adaptation of material and structure, can withstand the erosion of high temperature and high concentration media for a long time, while achieving efficient and energy-saving power transmission. In addition, the factory supports customizing pump bodies, impellers, and sealing materials according to working conditions, ranging from fluoroplastic alloys to special stainless steel, ensuring that each pump fits perfectly with the actual process. Thanks to the direct supply model from the source, customers not only enjoy price advantages, but also receive fast response technical services. From selection guidance to installation and debugging, there are no intermediate links in the whole process, truly achieving peace of mind when buying and using.

By combining the quality of mass production inspection with the ability to flexibly customize, Wolong Pump Valve has helped many chemical enterprises achieve quality and efficiency improvement in their operation and maintenance systems. Whether it is replacing old faulty equipment or configuring pump and valve systems for new production lines, their products have become a reliable choice in chemical medium transportation due to their long-term corrosion resistance, energy efficiency, and stability. Choosing the source factory is not only about choosing a pump, but also about choosing continuous production assurance and cost optimization, which solves the maintenance problems in chemical production.

Chemical production is most afraid of unexpected shutdowns, and stable operation is the core. The chemical pumps directly supplied by the source factory of Anhui Wolong Pump and Valve Co., Ltd. have undergone large-scale production and rigorous testing under extreme working conditions, and their operational stability has reached the top level. Whether it is sustained high temperature environments, high-pressure impacts, or complex and harsh working conditions such as corrosion and wear, it can handle them steadily, ensuring the continuity and reliability of the production process.

In addition to excellent universal performance, we also provide in-depth on-demand customization services. The materials of the pump body and key components can be specially selected and customized according to your specific process medium, accurately adapting to various working conditions with special corrosiveness or physical characteristics, and solving the matching problem from the source. This ensures that the device not only performs well under standard conditions, but also delivers long-lasting performance in exclusive scenarios.

The most crucial thing is that we supply directly as the source factory, completely eliminating the intermediate circulation link. There is no layer by layer markup, which means you can get the same top-notch quality at a better price. Truly achieving the integration of high performance and high cost-effectiveness - wide adaptability to multiple working conditions makes you worry free, and the price of direct supply from the source saves you money. Choosing us means choosing reliable guarantees and cost advantages for your chemical production line.

In modern chemical production, the raw material transportation process is like the "lifeblood" of the system, and its safety and stability are the cornerstone of overall operation. As the core equipment of this critical link, the performance of chemical pumps directly determines production safety, efficiency, and cost. We are well aware of the great responsibility, so we have always focused on the research and manufacturing of high-performance chemical pumps. By adopting advanced sealing technology and special corrosion-resistant alloy materials, we have fundamentally constructed a sturdy anti leakage barrier, effectively blocking the leakage of hazardous media and building the first line of defense for safe production.

In response to the complex composition and harsh working conditions of chemical media, Anhui Wolong Pump and Valve Co., Ltd. has conducted in-depth fluid dynamics research and continuously optimized the core component of the pump - the impeller. The new impeller spectrum not only significantly improves the smoothness and continuity of transportation, reduces pulse and cavitation phenomena, but also achieves significant energy-saving effects in the high-efficiency zone, helping customers reduce long-term operational energy consumption. Each delivered pump is not simply subjected to factory inspection, but undergoes rigorous performance and endurance testing on a testing platform that simulates real working conditions to ensure its reliable performance in practical applications. Our products can be widely adapted to various complex chemical scenarios such as acid and alkali transportation, solvent circulation, and high-risk medium transfer. We are committed to providing stable, efficient, and safe transportation solutions to make your production process more secure and reassuring.

The Great Cold comes at the end of the year, with winter passing and spring coming. Once the Great Cold passes, a new cycle begins. Da Han, the last solar term among the 24 solar terms, is also the coldest period of the year. At the end of the year, as winter deepens and frost and snow alternate, Anhui Wolong Pump and Valve Co., Ltd. extends warm greetings and care to you.

In this season of sudden temperature drops, customers, partners, and all employees must pay attention to cold prevention and keep warm: add clothing in a timely manner, prevent colds due to large indoor and outdoor temperature differences; Pay attention to equipment maintenance: Cold weather may affect equipment operation, please do a good job of inspection and protection; Pay attention to travel safety: In rainy and snowy weather, the road is slippery, so be careful when driving or walking; Proper warming and conditioning: There is a saying in folk culture that "welcoming the new year with a great cold", which can be supplemented appropriately to accumulate energy;

The Great Cold has arrived, and spring is about to begin. A year of perseverance and hard work will turn into a new force when the ice and snow melt. Anhui Wolong Pump and Valve Co., Ltd., together with you, we have walked through the last cold winter and welcomed the new spring. Professional manufacturing, craftsmanship inheritance; Knowing each other's warmth and coldness, walking with you.

In chemical production, the adaptability of pumps directly affects the smoothness of the process and overall efficiency. Anhui Wolong Pump and Valve Co., Ltd., have been deeply involved in the manufacturing of chemical pumps for many years, and have a deep understanding of the demanding requirements of different medium characteristics on equipment. For complex media such as strong corrosion, high wear, easy crystallization, or containing particles, we continuously optimize the pump body structure design and use corrosion-resistant and wear-resistant materials to create the core overcurrent components, significantly improving the pump's medium adaptability and service life. From raw material transportation to intermediate reactions, and then to finished product transportation, each pump undergoes strict multiple rounds of sealing testing and precise operation debugging before leaving the factory, ensuring that it can still achieve stable, low consumption, and low-noise long-term operation under complex working conditions such as high pressure, high temperature, and vacuum.

This persistent pursuit of reliability stems from our profound understanding of the continuity and safety of chemical production. The fluctuation of one link may affect the overall situation, and as the "power heart" in the process, the stability of the pump is crucial. Therefore, we not only focus on the performance parameters of the pump itself, but also strive to provide customers with overall solutions that are highly compatible with the process. Through in-depth communication and working condition analysis in the early stage, customized design and lean manufacturing in the middle stage, and installation guidance and continuous service in the later stage, we ensure that every pump put into operation can seamlessly integrate into the production chain, effectively reducing the risk of unplanned downtime and maintenance costs. In the end, all these efforts converge into a simple goal: to make every aspect of your production process more efficient, safe, and worry free.

In chemical production, frequent equipment damage and short service life are long-standing pain points that have plagued enterprises. They not only lead to production interruptions and increased maintenance costs, but also directly affect overall operational efficiency and safety. To this end, Anhui Wolong Pump and Valve Co., Ltd. focuses on the research and manufacturing of chemical pump products, placing excellent quality at the core. From design, material selection to strict control of processes, we ensure that every pump has excellent corrosion resistance, wear resistance, and fatigue resistance. By optimizing the fluid structure and operational stability, our chemical pumps can significantly reduce equipment losses, fundamentally extend their service life, and help you get rid of the trouble of frequent equipment replacement.

We insist on direct supply from the source, eliminating intermediate links, and providing more competitive prices while ensuring high quality. We also support customization according to specific requirements for different working conditions, and can adapt to a variety of corrosion-resistant and high-temperature resistant materials to ensure that the equipment perfectly matches your process conditions. Choosing our chemical pumps means one investment, long-term benefits - not only significantly reducing equipment replacement and maintenance costs, but also continuously providing reliable power for the production system, truly solving the problem of chemical production equipment lifespan, allowing you to focus on production with peace of mind.

Polyvinyl butyral (PVB), due to its excellent transparency, toughness, superior metal adhesion, and good film-forming properties, occupies an important position in coatings, adhesives, printing inks, and safety glass interlayers. By adjusting the degree of polymerization (molecular weight), degree of acetalization, and residual hydroxyl content, PVB is endowed with diverse physicochemical properties, forming a matrix of specifications to meet different industrial needs.

1. Core Specification System: Performance Comparison of HX, SY, and TX Series

The differences in PVB specifications are mainly reflected in two dimensions: viscosity (molecular weight) and degree of acetalization.

1.1 Differences in Viscosity (Molecular Weight) Grades

Viscosity is a core indicator determining the processing fluidity and film strength of PVB.

♠ Low-viscosity grades (PVB Resin B-02HX, CCP B-03HX):

Performance characteristics: Excellent dissolution speed and low viscosity at high solid content, with strong permeability.

Key applications: Mainly used in printing inks, metal foil coatings, and penetrating primers. Due to its shorter molecular chains, it provides a smooth film surface and good wettability.

♠ Medium-viscosity grades (CCP B-06HX, Changchun PVB B-08HX):

Performance characteristics: Balances processability and toughness, making it the most widely used "all-rounder" grade.

Key applications: Widely used in wood coatings (sealers) and ceramic adhesives. Its viscosity is sufficient to maintain pigment suspension while ensuring the strength of the green body after sintering.

♠ High-viscosity grades (Changchun PVB B-17HX, PVB B-20HXB):

Performance characteristics: High molecular weight, resulting in extremely high impact strength and tensile strength after film formation.

Key applications: Primarily used in safety helmets/composite materials and peelable protective films. In these areas, PVB provides strong structural support, preventing materials from shattering under stress.

1.2 Trade-off between Degree of Acetalization and Polarity

♣ HX series (standard type): The degree of acetalization ranges from 72-88wt%, providing good general solubility (e.g., in alcohol solvents).

♣SY series (high degree of acetalization): This series has a higher butyral group content. Comparative Advantages: Increased acetal content means enhanced hydrophobicity. Compared to the HX series, the SY series exhibits superior solubility in non-polar solvents (such as methyl ethyl ketone and toluene mixtures), lower water absorption, and better dimensional stability. It is commonly used in special paints or precision electronic adhesives requiring excellent water resistance.

♣ TX Series (Special Modification):

Comparative Advantages: Designed for high-temperature processing environments. Its optimized residual hydroxyl group distribution significantly improves heat resistance after crosslinking with resins.

Key Applications: Specifically used in printed circuit boards (PCB) and copper foil adhesives, capable of withstanding the high temperatures during the soldering process.

2. Comparison of Solubility Behavior in Different Solvent Systems

The performance of PVB is highly dependent on the choice of solvent. The manual indicates that PVB is readily soluble in alcohols, ketones, and esters, but insoluble in pure hydrocarbons.

Solvent Strength Comparison: Alcohols (such as ethanol and isopropanol) are the most commonly used solvents, providing stable viscosity; while adding a small amount of aromatic solvents (such as toluene and xylene) not only reduces costs but also effectively lowers system viscosity and improves coating efficiency.

Effect of Water Content: PVB is extremely sensitive to water. The manual emphasizes that even a very small amount of water in the solvent can lead to a sharp increase in solution viscosity, or even gelation. Therefore, in safety glass or optical films requiring high transparency, the solvent specifications must be strictly controlled.

3. Comparison of PVB's Functional Roles in Multiple Fields

Adhesion vs. Sintering Residue (Ceramic Industry)

In ceramic adhesives, compared to other organic resins, PVB's advantage lies in its extremely high green strength. It allows the powder to be tightly packed in the mold and has a "residue-free" characteristic during the sintering process, ensuring the electrical performance and mechanical structure of the ceramic product.

Anti-corrosion Function vs. Decorative Function (Metal Coating)

In wash primers, PVB reacts with chromates and phosphates to form a chemically bonded layer on the metal surface, providing excellent anti-corrosion performance. This contrasts sharply with its role as purely a leveling agent and film-forming agent in baked enamel coatings for metal cans.

Enhanced Toughness (Resin Modification)

When PVB is used in combination with epoxy resin or phenolic resin, its function shifts from being the "main film-forming component" to a "modifier." Compared to the brittleness of pure epoxy resin, the addition of PVB significantly improves impact toughness and adhesion to metals due to the incorporation of long-chain PVB into the cross-linked network formed during the resin curing process.

Low-viscosity grades prioritize flow and penetration, making them ideal for inks and primers;

High-viscosity grades prioritize strength and toughness, making them core components for structural materials and protective films;

High acetal content and modified grades (SY/TX) provide specialized solutions for extreme environments requiring water and heat resistance.

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In the industrial application of chloroprene rubber, the processing performance and physical properties of the rubber vary significantly depending on the type of regulator used during the polymerization process. CR121 and CR322 are two highly representative general-purpose chloroprene rubbers. This article will analyze the specific differences between sulfur-modified (CR121) and mixed-modified (CR322) chloroprene rubber from three dimensions: technical characteristics, processing performance, and application selection, providing professional reference for production and processing.

1. Comparison of Technical Characteristics and Performance Indicators of CR121 and CR322

CR121 belongs to the classic sulfur-modified chloroprene polymer. This type of rubber uses sulfur as a regulator during polymerization, and its molecular chain contains a certain amount of sulfur segments, which gives it good tear resistance and flexural resistance. In terms of physical form, CR121 is a yellowish-white or light brown block, with a density of 1.23. From a performance standard perspective, the crystallization rate of CR121 is at a medium-to-low level, its tensile strength is not less than 24 MPa, and its elongation at break is excellent, usually above 900%. In industry standards, CR121 is similar to Dupont Neoprene GNA and Denka Chloroprene PM-40.

In contrast, CR322 is a chloroprene polymer that uses sulfur and diisopropyl xanthate disulfide as mixed regulators. This "mixed modification" mode aims to retain the advantages of sulfur-modified types while introducing xanthate to improve the stability and processing flexibility of the rubber compound. CR322 is also a yellowish-white or light brown block, with a density of 1.23, and its crystallization rate is also medium-to-low. In terms of core physical indicators, the tensile strength of CR322 is slightly higher than that of CR121, reaching over 26 MPa, but the elongation at break is slightly lower, approximately 800%. This model is similar in performance to Dupont Neoprene GW.

In terms of Mooney viscosity, both offer subdivided grades to meet different needs. CR121 includes specifications such as CR1211 (20-40), CR1212 (41-60), and CR1213 (61-75). CR322 correspondingly offers grades such as CR3221 (25-40), CR3222 (41-60), and CR3223 (61-80). Both exhibit consistent Mooney scorch time, requiring more than 30 minutes, ensuring good thermal stability.

2. Analysis of Differences in Processing Performance and Physical Strength

Although CR121 and CR322 are similar in some basic physical indicators, the actual production experience brought about by "mixed modification" and "pure sulfur modification" is quite different.

The core advantage of CR121 lies in its extremely high elastic reserve and excellent dynamic fatigue resistance. Due to its elongation at break reaching 900%, under working conditions requiring significant stretching or frequent bending, the molecular chains of CR121 exhibit stronger fatigue resistance. However, the disadvantage of the pure sulfur modified type is that it requires stricter processing techniques, especially during mixing and extrusion, where the control of rubber flow and viscosity requires extensive experience.

CR322 is designed to compensate for the shortcomings of traditional sulfur-modified types. Official technical data shows that CR322 has better processing performance than pure sulfur-modified rubber. In actual production, due to the introduction of xanthate modifiers, CR322 has better plasticizing performance and more stable molding fluidity. In addition, CR322's tear strength is particularly outstanding, which matches its tensile strength of 26 MPa. This means that in situations involving sharp objects scratching or strong tearing, CR322 can provide more robust structural protection than CR121.

Furthermore, in terms of storage stability, both are basically the same. From the date of manufacture, they can be stored for one year below 20℃ and for six months below 30℃. However, in extreme climates or complex warehouse environments, the mixed-modified CR322 often exhibits better resistance to physical property degradation than the pure sulfur type, thanks to its diversified molecular structure improvements.

3. Typical Application Scenarios and Selection Guidelines

The choice between CR121 and CR322 depends primarily on the dynamic load requirements and manufacturing process of the final product.

♠ Applicable Scenarios for CR121: Due to its excellent flexural resistance and high elongation, CR121 is the preferred choice for manufacturing high-performance transmission products.

Industrial belts: Including conveyor belts, multi-ribbed belts, V-belts, and synchronous belts. In these applications, the rubber is repeatedly bent around pulleys, and the excellent bending fatigue resistance of CR121 significantly extends the belt's service life.

Heavy-duty cable sheathing: Especially for mining cable sheathing and other applications requiring frequent movement and dragging, the tear resistance and flexibility of CR121 provide reliable physical protection.

♠ Applicable Scenarios for CR322: Thanks to its higher physical strength and optimized processing rheology, CR322 performs better in structural rubber components.

Hose products: CR322 is commonly used in the manufacture of various chemical-resistant and weather-resistant industrial hoses. Its high tear strength ensures that the hose body is less prone to structural failure under pressure or external abrasion.

Complex molded parts: Due to its superior processing performance compared to sulfur-modified types, for rubber parts with complex shapes and high mold cavity filling requirements, using CR322 can effectively reduce the scrap rate and improve production efficiency.

Specialty tapes: In the manufacture of tapes requiring extremely high strength, CR322, with its tensile strength advantage of 26 MPa, can provide stronger load-bearing capacity.

Summary: If you are pursuing ultimate flexibility and dynamic fatigue resistance (such as synchronous belts and V-belts), CR121 is the technical "gold standard." If your production process requires high fluidity and moldability of the rubber compound, or if your product requires higher tensile strength and tear protection (such as pressure hoses and high-strength seals), then the mixed-modified CR322 will be a more efficient and cost-effective choice.

In practical applications, users also need to make fine adjustments based on specific grades (such as different Mooney viscosity levels). For example, CR1211 is suitable for processes requiring good flowability, while CR3223 is suitable for heavy industrial applications that demand higher hardness and tensile strength. Understanding the chemical modification mechanisms of these two materials is crucial for improving the quality of rubber products.

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