In modern finishing work, a spray gun is not merely an air tool; it is a precision instrument that directly affects surface quality, coating efficiency, material consumption, operator comfort, and the final value of the finished product. The W400 heavy duty spray gun is designed for users who need dependable atomization, stable output, and practical working efficiency in demanding painting environments. With selectable fluid nozzle sizes of 1.4 mm, 1.6 mm, and 2.0 mm, a 600 ml gravity cup, 50 PSI working air pressure, and a G1/4 inch air inlet, this model provides a balanced solution for automotive refinishing, metal coating, industrial repair, furniture finishing, equipment maintenance, and general professional paint application.

Unlike light-duty tools intended only for occasional use, the W400 belongs to the heavy duty spray gun category. This means it is developed for repeated operation, reliable coating delivery, and consistent spray performance across a wide range of finishing tasks. Its gravity feed design helps improve material flow, while the cup capacity supports practical working intervals without excessive refilling. For workshops, distributors, repair centers, finishing departments, and painting professionals, the W400 offers a combination of usability, durability, and production practicality.

Behind the product is Ningbo Lis Industrial Co., Ltd., a professional manufacturer engaged in the research, development, manufacturing, and marketing of air painting spray guns, mini air compressors, and related air tools. Established in 1984 and located in Ningbo, China, the company has developed into one of the largest enterprises in China’s painting spray gun industry. With more than 400 employees, a factory area exceeding 400,000 square feet, strong research and development capability, advanced quality management systems, and international certifications, the company provides manufacturing depth that supports consistent product quality and long-term supply reliability.

W400

Product Overview: A Heavy Duty Spray Gun Built for Practical Performance

The W400 is a gravity feed heavy duty spray gun with a 600 ml cup and multiple nozzle options. Its core value lies in its adaptability. A finishing worker may need fine atomization for thinner coatings, broader material delivery for medium-viscosity paints, or stronger output for heavier coating tasks. The availability of 1.4 mm, 1.6 mm, and 2.0 mm fluid nozzles allows users to select a configuration that better matches their coating material, working speed, and desired finish.

The 1.4 mm nozzle option is suitable for many fine finishing applications where a smoother surface and controlled paint volume are important. The 1.6 mm option provides a versatile balance for general coatings, primers, and medium material flow. The 2.0 mm option supports heavier materials or situations requiring higher output. This range gives the W400 a competitive advantage over single-nozzle tools, because users can adapt the gun to more jobs rather than purchasing separate spray guns for each task.

The gravity feed system is another important practical advantage. In a gravity spray gun, coating material is held above the gun body and is assisted by gravity as it moves into the fluid passage. This arrangement can help reduce the need for excessive suction, making material delivery more responsive and efficient. Compared with older conventional suction feed designs, a gravity feed spray gun can help reduce paint waste, improve control at lower material levels, and support more stable spray behavior during detailed work.

The 600 ml cup capacity is well suited for professional operation. It is large enough to support continuous spraying for many common finishing jobs, yet not so oversized that it makes the tool unnecessarily heavy or difficult to control. This balance matters because fatigue affects quality. A painter who can maintain a steady wrist angle, consistent distance, and controlled movement is more likely to achieve uniform film thickness and a smooth finish. The W400’s practical cup size supports workflow efficiency without ignoring operator comfort.

Key Technical Specifications

Item	Specification	Practical Meaning
Product Model	W400	Heavy duty spray gun for professional coating tasks
Category	Heavy Duty Spray Guns	Designed for repeated workshop and industrial use
Fluid Nozzle Options	1.4 mm / 1.6 mm / 2.0 mm	Supports fine, general, and heavier coating applications
Air Pressure	50 PSI	Provides strong atomization energy for consistent spraying
Cup Capacity	600 ml	Balances continuous work time and manageable tool weight
Feed Type	Gravity	Improves material flow and supports efficient paint use
Air Inlet	G1/4 inch	Compatible with common air pipeline and fitting arrangements
Carton Size	84.5 cm × 44 cm × 15 cm, 10 pcs per carton	Convenient for distributors, bulk shipping, and warehouse planning

Why Nozzle Choice Matters in Professional Finishing

One of the most important features of the W400 is its nozzle flexibility. In spray finishing, the nozzle size influences coating volume, atomization quality, spray pattern behavior, and the type of material that can be used effectively. A nozzle that is too small for a coating may restrict material flow, slow down the job, or require excessive thinning. A nozzle that is too large for a fine coating may deliver too much material, increasing the risk of runs, orange peel, and uneven film thickness. By offering 1.4 mm, 1.6 mm, and 2.0 mm options, the W400 gives users practical control over the spraying process.

For fine topcoats and clear finishes, many painters prefer smaller nozzles because they can support refined atomization and controlled application. The 1.4 mm option is useful for applications where surface appearance is especially important, such as automotive panels, decorative metal parts, and certain woodworking finishes. When coating quality is judged visually under light, a consistent spray pattern and controlled paint volume can make a significant difference.

The 1.6 mm nozzle serves as a general-purpose choice. It can be suitable for a broad range of coatings where neither extremely fine output nor very heavy flow is required. For workshops that handle varied work every day, this nozzle size can reduce setup complexity. Operators can use it for common primers, base materials, and medium-viscosity paints, depending on coating manufacturer guidance and thinning requirements.

The 2.0 mm nozzle broadens the W400’s usefulness for heavier coatings, higher build materials, or situations that call for faster output. In industrial maintenance, equipment repair, and certain primer applications, a larger fluid passage can improve productivity. Instead of forcing a small spray gun to handle thick material poorly, operators can choose a larger nozzle that better suits the job. This improves working efficiency and can reduce defects caused by improper material delivery.

Gravity Feed Efficiency Compared with Conventional Alternatives

The W400’s gravity feed design gives it a practical advantage over many conventional suction feed spray guns. In suction feed systems, air pressure creates a vacuum to draw material upward from a cup below the gun. While this design has been used for many years, it can require stronger airflow and may struggle when cup levels become low or material viscosity changes. Gravity feed systems place the cup above the gun, allowing material to move downward naturally into the fluid passage.

This gravity assistance can improve paint usage efficiency because less material may remain trapped in the cup after spraying. It can also help the operator maintain better control during intermittent spraying, touch-up work, and smaller batches. For shops where coating materials are expensive, reducing waste is not a minor issue. Even small savings per job can become meaningful over months of operation.

Gravity feed spray guns can also support more responsive triggering. When the operator pulls the trigger, material flow is already aided by its position above the gun body. This helps produce a more immediate and predictable spray response. For work involving edges, curves, frames, recessed sections, and detailed surfaces, predictable response improves control and reduces the chance of dry spray or excessive overlap.

Compared with low-cost entry-level spray guns, the W400’s heavy duty positioning and practical specifications make it better suited for repeated use. Many economy tools may be acceptable for occasional hobby work but can become inconsistent under daily shop conditions. A professional user needs more than a low purchase price. The tool must spray consistently, be easy to set up, withstand regular cleaning, and support repeatable results. The W400 is designed to address these professional expectations.

Air Pressure and Atomization Performance

The W400 operates at 50 PSI, giving the spray gun strong atomization capability for heavy duty finishing work. Air pressure is critical because it breaks the liquid coating into fine droplets and shapes the spray pattern. If atomization is weak, the coating may appear rough, uneven, or heavy. If air pressure is excessive or poorly controlled, it may create overspray, waste material, and make it harder to achieve a controlled finish. The W400’s specified pressure provides a clear operating reference for users preparing their compressed air system.

In a professional workshop, the spray gun is only one part of the finishing system. Air compressors, filters, regulators, hoses, fittings, and moisture control all affect final results. The G1/4 inch air inlet on the W400 supports compatibility with common air supply systems and accessories. When paired with a stable compressor and proper air preparation, the spray gun can deliver consistent atomization and reduce common finish problems caused by moisture, pressure fluctuation, or contamination.

The company’s broader product range includes mini oil-free compressors, air pipeline accessories, air fittings and accessories, paint tanks, spray gun kits, air blow guns, sandblast guns, tyre inflating guns, water guns, grease guns, air polishers, airless spray guns, electric spray guns, and paint sprayers. This wide manufacturing experience is valuable because it shows familiarity with the entire air tool and spraying ecosystem. A manufacturer that understands air supply, accessories, and finishing equipment can design spray guns with practical compatibility in mind.

Heavy Duty Construction for Demanding Work Environments

Heavy duty spray guns must endure more than occasional paint application. They are often exposed to solvent cleaning, repeated triggering, air pressure cycles, coating residue, accidental impacts, and long operating hours. The W400 is positioned for users who need a practical tool that can support regular workshop operation. While proper maintenance is always necessary, the product’s heavy duty category indicates that it is made for more demanding conditions than basic light-duty spray guns.

Durability is important not only because it extends product life but also because it protects finishing consistency. A spray gun that wears quickly may develop leakage, poor pattern control, unstable fluid delivery, or uneven atomization. These issues increase rework costs and reduce productivity. A dependable heavy duty gun can help maintain predictable operation across repeated jobs, which is especially valuable for repair shops, production lines, and distributors serving professional users.

The carton specification of 10 pieces per carton with a carton size of 84.5 cm × 44 cm × 15 cm also reflects practical supply planning. For wholesalers, importers, and professional tool distributors, packaging efficiency matters. A product that is easy to carton, store, handle, and ship supports better inventory management. The W400 is therefore not only a tool for the painter; it is also a product designed with commercial distribution in mind.

Advantages Over Competing Spray Guns

The W400 offers several competitive advantages when compared with many generic spray guns in the market. First, it combines heavy duty positioning with a versatile nozzle range. Many lower-priced models are offered with limited nozzle choices, reducing their adaptability. The W400 gives users three important nozzle options, helping one platform cover multiple coating tasks.

Second, the gravity feed design provides improved material handling compared with traditional suction feed tools. This can contribute to better paint transfer, smoother workflow, and reduced leftover material. For professional users, efficiency is measured not only by how quickly a tool sprays but also by how much coating is wasted, how much rework is required, and how easily the operator can maintain control.

Third, the 600 ml cup capacity offers a practical compromise between work time and balance. Some competitors use smaller cups that require frequent refilling, interrupting the painting rhythm. Others use larger cups that may become heavy and difficult to control during extended use. The W400’s cup size is appropriate for many common tasks and helps support steady operation.

Fourth, the product benefits from the manufacturing scale and quality systems of Ningbo Lis Industrial Co., Ltd. A spray gun’s performance depends on machining accuracy, component fit, air passage design, quality inspection, and consistency from batch to batch. The company’s long history, large production base, and certifications create a stronger foundation than suppliers that only assemble low-cost tools without deep technical control.

Fifth, the company offers OEM and ODM services, which is important for international distributors and professional buyers. Customers who require specific packaging, configurations, private-label solutions, or product adaptation can benefit from a manufacturer with engineering capacity. This flexibility makes the W400 and related product lines more suitable for global markets with different standards, user habits, and distribution requirements.

Manufacturing Strength Behind the Product

Ningbo Lis Industrial Co., Ltd. has been engaged in the spraying equipment industry for decades. Since its establishment in 1984, the company has continuously developed its production capability, technical expertise, and quality management. It operates in Ningbo, a port city known for convenient transportation, developed industry, and strong export support. This location helps the company serve global customers efficiently while maintaining stable access to supply chains and logistics channels.

The factory covers more than 400,000 square feet and employs more than 400 people. Large-scale manufacturing capacity is a major advantage for customers who require stable supply. In the spray gun industry, consistency matters. A professional distributor does not want a product that performs well in one shipment and differently in the next. Manufacturing scale, process control, and trained staff help reduce variation and support repeatable product quality.

The company has achieved recognition as a national high-tech enterprise, a customs advanced certification enterprise, an individual item champion of Ningbo City, and a provincial engineering and technology center. These achievements indicate that the company is not limited to basic production. It has invested in technology, management, compliance, and product development. For the W400, this manufacturing background means the product is supported by industrial experience and technical resources.

Annual output exceeding 40 million US dollars reflects the company’s ability to meet substantial market demand. Production capacity is especially important for buyers who purchase in volume, supply regional markets, or manage seasonal demand. The company states that production capacity can be increased by 30% within two months, which provides reassurance to customers with fluctuating order requirements. In a competitive global market, the ability to scale production quickly is a real business advantage.

Advanced Process Control and Quality Assurance

Spray gun quality depends on many small details. Air channels must be accurately formed. Fluid passages must be smooth and properly aligned. Nozzles and needles must fit correctly. Threads must connect securely. Seals must resist leakage. Trigger movement must feel controlled. The spray pattern must remain stable after repeated use. These outcomes require process discipline rather than simple assembly.

Ningbo Lis Industrial Co., Ltd. follows quality management practices based on the ISO9000 quality system. The company has also passed ISO9001 international quality system certification, OHSAS18001 occupational health and safety system certification, and ISO14001 environmental management system certification. These systems support organized production, safer working conditions, environmental responsibility, and consistent product inspection.

Quality control begins with raw material management. If material quality is unstable, the final spray gun cannot be stable. The company emphasizes strict control from raw material through production and final inspection. This is important for spray gun bodies, nozzles, air caps, needles, cups, seals, and fittings. Each part contributes to the performance of the complete tool.

During production, machining accuracy and surface treatment are critical. A spray gun’s internal and external surfaces affect durability, cleaning convenience, and airflow behavior. Proper production processes help ensure that parts fit together correctly and operate smoothly. Final inspection then verifies that the product meets performance and appearance requirements before shipment. This complete quality chain gives buyers greater confidence than products sourced from suppliers without systematic inspection.

The company’s products have passed CE and GS certifications. These certifications are meaningful for international markets because they reflect compliance with recognized standards and buyer expectations. For European and global customers, certification support can simplify product acceptance and strengthen distributor confidence.

Research and Development Capability

A strong spray gun manufacturer must do more than reproduce existing designs. Coating materials, user expectations, air systems, environmental requirements, and market preferences continue to change. Research and development capability allows a manufacturer to improve product structure, optimize performance, develop new models, and respond to customer needs.

Ningbo Lis Industrial Co., Ltd. has a strong R&D team and provides both OEM and ODM services. OEM service allows customers to order products according to supplied drawings or samples. ODM service allows the company to develop solutions according to customer needs. This is valuable for customers who want differentiated products, regional specifications, special packaging, or tailored configurations.

The company has established a spraying machinery engineering technology center and has carried out technical cooperation with American Wagner Spraying Technology Co., Ltd., focusing on the development and research of spraying machinery. Such technical engagement helps improve the company’s understanding of coating application, mechanical design, and international product expectations. For the W400, this background supports confidence that the product belongs to a broader system of continuous improvement rather than being an isolated model.

Innovation in spray guns may involve air cap design, nozzle geometry, ergonomic balance, material compatibility, sealing structure, trigger feel, cleaning convenience, and production repeatability. Even small improvements can produce meaningful benefits for professional users. A better-balanced tool reduces fatigue. A more stable air cap improves pattern consistency. Better sealing reduces leakage. More accurate machining improves atomization. These details define the difference between a basic tool and a professional finishing instrument.

Applications for the W400 Heavy Duty Spray Gun

The W400 can be used in a wide range of coating environments. Its gravity feed design and selectable nozzle sizes make it suitable for general refinishing, repair painting, industrial coating, furniture work, metal surface finishing, equipment maintenance, and workshop spraying tasks. Users should always match nozzle size, air pressure, viscosity, and coating manufacturer recommendations to achieve best results.

In automotive refinishing, the W400 can support primer, basecoat, and topcoat tasks depending on configuration and material requirements. The 1.4 mm nozzle can be useful for finer coating layers, while the 1.6 mm and 2.0 mm options can support higher material delivery where needed. Automotive work demands control because uneven film build, overspray, or poor atomization can lead to visible defects. The W400’s practical design helps operators maintain steady application technique.

In woodworking, finishing quality affects the appearance and value of the product. Cabinets, furniture, doors, panels, and decorative components require even coating and controlled spray patterns. The gravity feed system can help reduce waste when applying stains, sealers, lacquers, or paints, depending on material compatibility. The ability to choose nozzle size helps adapt the tool to different finishing systems.

In industrial maintenance, productivity and durability are often more important than ultra-fine decorative finishing. Equipment parts, frames, metal structures, machinery housings, and maintenance components may require stronger coating output and reliable coverage. The W400’s heavy duty category and 2.0 mm nozzle option make it relevant for such work, while the smaller nozzle options allow the same platform to handle more refined tasks when required.

In general workshops, versatility is often the key purchasing factor. A shop may handle metal parts one day, wood panels the next, and repair painting later. Buying separate spray guns for every situation increases cost and inventory complexity. The W400’s nozzle range and practical cup capacity help workshops cover many tasks with a single model family.

Operator Experience and Workflow Benefits

A spray gun must feel manageable in the operator’s hand. Even a technically capable gun can produce poor results if it is tiring, awkward, or difficult to control. The W400’s 600 ml gravity cup provides enough capacity for meaningful work intervals while remaining practical for manual handling. This matters during long passes, vertical surfaces, overhead angles, and detailed edge work.

Workflow efficiency also depends on setup and cleaning. A gravity feed spray gun is generally convenient for smaller batches and color changes because the cup is accessible and material flow is direct. Proper cleaning after use is essential for maintaining nozzle accuracy and preventing dried coating from affecting the spray pattern. Users should flush compatible cleaning solvent through the fluid passage, clean the cup, remove residue from the nozzle and air cap, and store the gun in a clean environment.

The G1/4 inch air inlet supports connection with common fittings and air supply accessories. A stable air supply is essential for good performance. Users should install moisture separation and filtration when spraying coatings sensitive to contamination. A regulator near the gun can help maintain consistent pressure. Clean, dry, regulated air will help the W400 perform more consistently and reduce defects such as bubbling, spitting, uneven atomization, and water contamination.

Professional painters often judge a spray gun by repeatability. Once the gun is adjusted to the desired pattern, they want it to maintain that behavior during the job. Repeatability reduces mental workload and allows the operator to focus on movement, overlap, distance, and surface inspection. The W400’s heavy duty design and manufacturing background are intended to support this kind of dependable operation.

How the W400 Supports Lower Total Cost of Ownership

When evaluating a spray gun, purchase price is only one part of the cost. A cheaper gun may become expensive if it wastes paint, creates defects, requires frequent replacement, or slows down workers. The W400 supports lower total cost of ownership through adaptability, efficient gravity feed material delivery, practical cup capacity, and durable heavy duty positioning.

Paint and coating materials can be costly. A spray gun that helps control output and reduce waste can save money over time. The nozzle options allow users to avoid using an improper setup that either over-applies or under-atomizes the material. Better matching between nozzle and coating improves efficiency and finish quality.

Rework is another hidden cost. Runs, uneven texture, dry spray, poor coverage, and rough finish can require sanding, repainting, material loss, and labor time. While operator skill remains critical, a stable and properly selected spray gun reduces the likelihood of avoidable defects. The W400 provides a professional platform that supports better process control.

Downtime is also costly. If a spray gun fails during a job or cannot be cleaned properly, production stops. Heavy duty design, quality-controlled manufacturing, and reliable supply support long-term operation. For distributors, product consistency reduces complaints and returns. For workshops, reliable tools reduce interruptions.

Global Supply Capability and Customer Support

Ningbo Lis Industrial Co., Ltd. serves customers around the world and has developed business relationships across Europe, North America, the Middle East, South Africa, East Asia, and other regions. Global market experience is important because different countries have different preferences, standards, fitting systems, packaging requirements, and application habits. A manufacturer with international experience is better prepared to support varied customer needs.

The company offers a broad product category portfolio, including HVLP spray guns, heavy duty spray guns, woodworking low pressure spray guns, economical conventional spray guns, texture paint spray guns, paraffin washing guns, air blowing guns, sandblast guns, foam guns, tyre inflating guns, water guns, grease guns, automatic spray guns, air brushes, mini oil-free compressors, air pipeline accessories, paint tanks, air fittings and accessories, air polishers, spray gun kits, pro touch-up spray guns, car polish machines, airless spray guns, electric spray guns, and paint sprayers. This wide range allows buyers to build complete product programs from one supplier.

For importers and distributors, working with a manufacturer that can supply multiple related categories simplifies sourcing. Instead of coordinating many separate factories, buyers can consolidate orders, maintain consistent quality expectations, and develop more efficient logistics. The W400 can therefore be part of a broader professional spraying and air tool solution.

The company’s stated mission is to create value for global customers through innovative design, high-quality products, and services. Its vision focuses on the painting industry and on providing professional products, services, and solutions for domestic and worldwide needs. These goals align with the requirements of professional users who need both product performance and supplier reliability.

Recommended Use and Best Practices

To achieve best results with the W400, users should begin by selecting the correct nozzle size for the coating. The coating manufacturer’s technical data sheet should be consulted for viscosity, recommended spray equipment, pressure range, thinning ratio, and film thickness. If the material is too thick for the selected nozzle, atomization may be poor. If the nozzle is too large, excessive material may be applied.

Before spraying the final workpiece, users should test the spray pattern on a sample panel or test surface. The pattern should be even, without heavy edges, dry center, spitting, or irregular shape. Adjustments should be made carefully, including air pressure, fluid control, fan width, and spraying distance. A consistent overlap pattern is usually necessary for even coverage.

Air preparation is essential. Compressed air should be clean and dry. Moisture in the air line can cause coating defects, especially in automotive and fine finishing applications. Oil contamination can create fisheyes and adhesion problems. Proper filters, separators, and regulators should be used to protect finish quality.

Cleaning should be performed immediately after use. Coating left inside the gun can dry and block fluid passages. The cup should be emptied, flushed, and wiped clean. The nozzle and air cap should be cleaned using appropriate tools that do not damage precision openings. Needles and seals should be handled carefully. Good maintenance extends service life and keeps the spray pattern stable.

Operators should also wear appropriate personal protective equipment, including respirators suitable for the coating type, eye protection, gloves, and protective clothing. Spraying should be performed in a properly ventilated area or approved spray booth according to local safety regulations. The spray gun is one part of a safe finishing process; responsible operation protects both workers and product quality.

Why Manufacturing Origin and Company Strength Matter

In the global tool market, many spray guns appear similar from the outside. However, performance differences often come from manufacturing details that buyers cannot see immediately. Internal air channel design, nozzle concentricity, needle fit, material selection, machining tolerance, surface treatment, assembly discipline, and inspection standards all influence the final result. This is why the manufacturer’s strength matters.

Ningbo Lis Industrial Co., Ltd. has more than four decades of industry experience. This long operating history suggests accumulated knowledge in product design, production control, supplier management, and export service. The company’s scale, certification background, engineering center, and R&D capability give it a stronger foundation than short-term trading suppliers.

The company’s quality philosophy emphasizes that product quality is the key to gaining a larger market share. It applies stringent quality control throughout the whole system, from raw materials to production and final inspection. For a product like the W400, this approach is critical because users expect every unit to perform predictably. A professional buyer needs confidence not only in one sample but in repeated shipments.

Advanced manufacturing is also linked to customization. Because the company can provide OEM according to drawings or samples and ODM according to customer needs, it can support customers who want differentiated specifications. This ability is valuable in competitive markets where distributors need products aligned with local demand.

Positioning the W400 in a Professional Product Line

The W400 is best understood as a practical heavy duty gravity spray gun for users who need reliable performance without unnecessary complexity. It is not limited to one narrow task. Instead, it provides a flexible nozzle platform, a sensible cup size, standard air connection, and professional production support. This makes it suitable for workshops, distributors, industrial users, and finishing professionals who value both function and supply reliability.

Compared with miniature touch-up guns, the W400 offers greater capacity and broader coating output. Compared with basic economy spray guns, it provides heavier duty positioning and manufacturing support. Compared with specialized high-cost spray equipment, it remains practical and accessible for common professional applications. This balanced positioning is one of its key strengths.

The W400 also fits naturally into broader spraying solutions. A customer may combine it with air compressors, filters, hoses, fittings, spray gun kits, air polishers, or paint tanks from the same manufacturing ecosystem. This supports a more complete finishing setup and helps reduce compatibility concerns.

Q&A Section

What type of spray gun is the W400?

The W400 is a heavy duty gravity feed spray gun designed for professional paint and coating applications. It uses a 600 ml cup and offers 1.4 mm, 1.6 mm, and 2.0 mm fluid nozzle options.

What are the main advantages of the gravity feed design?

The gravity feed design helps material flow naturally from the cup into the gun. This can improve responsiveness, reduce leftover material, support efficient coating use, and make the gun practical for a wide range of finishing tasks.

Which nozzle size should be selected?

The 1.4 mm nozzle is generally suitable for finer coatings and controlled finish work. The 1.6 mm nozzle is a versatile general-purpose option. The 2.0 mm nozzle is useful for heavier materials or higher output applications. Users should always follow the coating manufacturer’s recommendations.

What air pressure does the W400 use?

The W400 is specified for 50 PSI air pressure. A clean, dry, and stable compressed air supply is recommended for consistent atomization and finish quality.

What is the cup capacity?

The W400 has a 600 ml cup. This capacity provides a practical balance between continuous spraying time and manageable tool weight.

What air inlet does the spray gun use?

The W400 uses a G1/4 inch air inlet, which is compatible with many common air fittings and workshop air supply systems.

What applications is the W400 suitable for?

The W400 can be used for automotive refinishing, general repair painting, metal coating, woodworking finishing, industrial maintenance, equipment painting, and workshop coating tasks, depending on nozzle selection and coating compatibility.

How does the W400 compare with low-cost spray guns?

The W400 offers heavy duty positioning, multiple nozzle options, a practical gravity feed system, and the support of an experienced manufacturer with established quality systems. These factors help improve consistency, adaptability, and long-term value compared with many basic economy tools.

Why is the manufacturer important when selecting a spray gun?

Spray gun performance depends on precision manufacturing, component fit, quality control, and repeatable production. Ningbo Lis Industrial Co., Ltd. has decades of experience, a large production base, international certifications, and R&D capability, which support product consistency and supply reliability.

Can the product be supplied for distributors or customized orders?

Yes. The manufacturer provides OEM and ODM services and has experience serving international customers. The W400 is also packaged in cartons of 10 pieces, supporting wholesale and distribution requirements.

Conclusion

The W400 heavy duty spray gun is a practical and versatile solution for professional coating work. Its 1.4 mm, 1.6 mm, and 2.0 mm nozzle options allow users to adapt the gun to different materials and application needs. The gravity feed design supports efficient material delivery, while the 600 ml cup capacity provides a balanced working experience. With 50 PSI air pressure and a G1/4 inch air inlet, the W400 fits common workshop systems and supports dependable atomization when used with proper air preparation.

Its advantages extend beyond product specifications. The W400 is backed by Ningbo Lis Industrial Co., Ltd., a manufacturer with a long history, large production capacity, strong R&D capability, international certifications, and a broad product ecosystem in spraying equipment and air tools. For professional users, distributors, and industrial buyers, this manufacturing strength is essential. It supports consistency, quality control, customization, and dependable supply.

In a market filled with similar-looking spray guns, the W400 stands out through its balanced design, heavy duty positioning, flexible nozzle selection, and strong manufacturing foundation. It is suitable for users who need reliable coating performance, practical operation, and long-term value from a professional spray gun.

References

1. Technical product specifications for W400 heavy duty gravity spray gun, Ningbo Lis Industrial Co., Ltd.

2. Company profile and manufacturing capability information, Ningbo Lis Industrial Co., Ltd.

3. ISO 9001 quality management system principles and industrial production control guidelines.

4. CE and GS product certification principles for international tool and equipment markets.

5. General principles of spray finishing, atomization, nozzle selection, and compressed air preparation in professional coating applications.

Product: W400