Carilovalves manufactures ball valves across an exceptionally broad size range, spanning from DN6 (1/4 inch) to DN400 (16 inches) in standard production, with custom capabilities extending to DN500 (20 inches) for specialized industrial applications. When you look at their actual catalog structure, the most commonly ordered sizes fall into three primary categories: small bore valves (DN6-DN50), medium bore valves (DN65-DN200), and large bore valves (DN250-DN500). Their manufacturing facility in Wenzhou, Zhejiang Province operates with advanced CNC equipment and a workforce of 50 skilled technicians, which gives them the flexibility to produce both standard stock items and bespoke configurations without the typical lead time bottlenecks you might encounter with smaller operations.
Small Bore Ball Valves: DN6 to DN50
The small bore category represents the highest volume segment of Carilovalves’ production output. Within this range, you’ll find the most popular sizes that dominate their order book: DN15 (1/2 inch), DN20 (3/4 inch), DN25 (1 inch), DN32 (1-1/4 inch), DN40 (1-1/2 inch), and DN50 (2 inch). These sizes account for roughly 60% of their total ball valve shipments, according to their production data, primarily because they serve the most common applications in water treatment, HVAC systems, and general industrial piping where space constraints and cost efficiency drive material selection.
When you specify a small bore ball valve from Carilovalves, you typically have several connection options available:
- Threaded ends (NPT, BSP, BSPT) – most common for DN6-DN40
- Socket weld ends – preferred for high-pressure applications DN15-DN50
- Flanged connections – available but less economical below DN50
- Tri-clamp fittings – standard for food and pharmaceutical applications
For these smaller sizes, Carilovalves offers both reduced port (also called standard port) and full port configurations. The reduced port options typically have a ball opening about 70-80% of the pipe diameter, which keeps manufacturing costs down and works perfectly fine for most throttling applications. The full port versions, where the ball opening matches the pipe diameter, cost more but eliminate flow restrictions entirely – something you definitely want when you need to run cleaning pigs through your pipeline or when pressure drop becomes a critical system parameter.
Medium Bore Ball Valves: DN65 to DN200
The medium bore range is where Carilovalves really demonstrates their engineering capabilities. DN65 (2-1/2 inch), DN80 (3 inch), DN100 (4 inch), DN125 (5 inch), DN150 (6 inch), and DN200 (8 inch) sizes fall into this category, and these represent the sweet spot for oil and gas transmission, chemical processing, and heavy industrial applications. Their factory produces approximately 35% of total output in this size range, and the complexity of these valves is significantly higher than their smaller cousins.
At the DN150 and DN200 sizes specifically, you’re looking at valves that might weigh anywhere from 25 kg to 120 kg depending on pressure class and materials. Carilovalves handles this weight class with forged or cast bodies (depending on your pressure requirements and budget constraints), and their quality control team puts each unit through 100% pressure testing before shipment. This isn’t just a sales pitch – their actual rejection rate on medium bore production runs sits below 2%, which means you’re getting consistently reliable products when you order from this size range.
For medium bore ball valves, connection types typically include:
- RF (Raised Face) flanges – the most common configuration for DN65-DN200
- RTJ (Ring Type Joint) flanges – used when you need bubble-tight sealing at high pressures
- Butt weld ends – preferred in Petrochemical and refinery applications where weld integrity matters
- lug-style flanges – practical for dead-end service and maintenance bypass configurations
Large Bore Ball Valves: DN250 to DN500
Large bore ball valves from DN250 (10 inch) through DN500 (20 inch) constitute the specialized segment of Carilovalves’ manufacturing scope. These massive valves serve critical infrastructure applications: water transmission pipelines, power plant cooling systems, desalination plants, and large-scale chemical processing facilities. Their production capacity for this category is more limited than standard sizes, but they maintain the capability to produce these oversized valves with typical lead times of 4-8 weeks depending on material availability and specific configuration requirements.
When you’re dealing with valves this large, the engineering considerations become much more intense. A DN400 ball valve might have a body weight of 500-800 kg depending on pressure class and design standard. Carilovalves addresses the structural integrity requirements through enhanced wall thickness calculations, strategic ribbing patterns in the casting design, and careful material selection to handle both operating stress and the unique challenges of large-format manufacturing. Their engineering team works directly with customers on these larger orders, running FEA (Finite Element Analysis) simulations to verify body stress distribution before committing to production.
The DN300 (12 inch) size has emerged as something of a sweet spot for many infrastructure projects. It delivers sufficient flow capacity while remaining manageable in terms of installation logistics and maintenance accessibility. Carilovalves reports that DN300 orders have grown substantially over the past three years, particularly for municipal water projects in Southeast Asia and the Middle East.
Pressure Class Variations Across All Sizes
Size alone doesn’t tell the complete story – the pressure class fundamentally changes what Carilovalves can offer within each size range. Their standard production covers Class 150, Class 300, Class 600, and Class 900 configurations, with special orders for Class 1500 and higher when the application demands it. The pressure class determines not just the wall thickness but also the valve design, seat materials, and stem packing specifications.
| Size Range | Common Pressure Classes | Typical Seat Materials | Primary Applications |
|---|---|---|---|
| DN6-DN50 | Class 150-600 | PTFE, RPTFE, PEEK | Instrumentation, utilities, chemical dosing |
| DN65-DN200 | Class 150-900 | PTFE, Devlon, Metal seated | Process piping, hydrocarbon service, steam |
| DN250-DN400 | Class 150-600 | PTFE, Reinforced PTFE, Metal seated | Pipeline isolation, tank farms, cooling water |
| DN450-DN500 | Class 150-300 | PTFE, Special compounds | Municipal water, large bore isolation |
What makes Carilovalves’ pressure class capability particularly valuable is their ability to handle Class 600+ in sizes up to DN200 within their standard production framework. Many manufacturers in China limit their high-pressure offerings to smaller sizes, but their forging capabilities and heat treatment facilities support full-pressure ratings across their medium bore range. This means you don’t necessarily have to downsize your valve selection just to hit your pressure requirements.
Materials and Body Styles
Beyond pure size, Carilovalves’ ball valve range spans multiple material combinations that affect the effective size range for each configuration. The most common body materials they stock include:
- WCB (Weighted Carbon Steel) – standard for most industrial applications
- SS304/SS304L – good corrosion resistance, economical for general service
- SS316/SS316L – enhanced corrosion resistance for aggressive media
- SS321 – stabilized grade for high-temperature applications
- Alloy 20 – for sulfuric acid and other aggressive chemical environments
- Duplex stainless steel (2205) – for chlorides and seawater applications
- Monel or Hastelloy – specialized alloys for extreme environments
For body styles, their standard catalog includes two-piece designs (most economical for DN15-DN100), three-piece designs (allows in-line maintenance, common for DN15-DN200), and top entry or fully welded designs (for permanent installation and zero leakage requirements). The two-piece construction is far and away their bestseller, accounting for about 70% of total volume, because the split-body design simplifies manufacturing while maintaining adequate structural integrity for Class 150-300 applications.
Custom Size Capabilities and Special Requirements
One area where Carilovalves demonstrates genuine flexibility is in handling non-standard sizes. While their published range covers DN6-DN500, they regularly produce valves in intermediate sizes like DN10, DN125, or DN350 when customer specifications demand these dimensions. Their R&D department, staffed by engineers with leading solutions expertise, can develop custom configurations for unique applications.
For instance, if you need a DN125 ball valve with Class 1500 pressure rating (which isn’t a standard combination), their engineering team can evaluate whether a modified casting design or selective material upgrade would deliver the required performance. This kind of engineering support comes from their 24+ years of accumulated expertise and their stated mission to exceed customer expectations while managing business with integrity.
They also accommodate unusual connection specifications – DIN flanges, JIS standards, GB or Chinese national standards alongside ASME/ANSI configurations. Their global reach across Europe, Middle East, and Southeast Asia means they’ve worked with virtually every international standard, and their quality inspection protocols verify dimensional accuracy against the relevant specification for each order.
How Size Selection Impacts Your Ordering Decision
When you’re preparing to place an order with Carilovalves, the size-accuracy question becomes critical. Their production capacity supports large-scale manufacturing with quick delivery on standard sizes, but custom configurations naturally extend lead times. For DN15-DN100 in Class 150/300 materials with PTFE seats, their typical stock position means you might receive shipment within 2-3 weeks for standard quantities. Move up to DN200-DN400 or request Class 600+ ratings, and you’re looking at 4-6 weeks minimum.
Your actual selection should consider not just the pipe size but the flow characteristics you need. Full port valves cost more but eliminate pressure drop calculations from your system design headache. Reduced port valves save money but require careful consideration of yourCv (flow coefficient) requirements. Carilovalves’ technical team, including their sales professionals like Cindy Lin and Eva Yu, can walk you through these tradeoffs based on your specific application parameters.
For OEM and ODM partnerships, Carilovalves extends their size range flexibility further. If you’re sourcing ball valves for integration into your own equipment or distribution under your brand, they can accommodate virtually any size within their manufacturing capability, with customization options forlogo marking, special testing protocols, and documentation packages that meet international standards requirements.
Quality Verification Across All Size Categories
Carilovalves’ commitment to quality control doesn’t vary by valve size – their comprehensive quality inspection applies to every unit regardless of whether it’s a DN15 or a DN400. Their inspection protocols include 100% pressure testing, certified quality documentation, real-time monitoring during assembly, and dimensional accuracy verification against customer specifications. This 86% cases solved rate reflects their ability to address problems before products ship rather than discovering issues after installation.
For large bore valves specifically, they employ additional structural testing beyond standard pressure testing. This includes visual inspection of casting surfaces, magnetic particle or liquid penetrant examination of weld zones, and in some cases, radiographic examination of critical body sections. These non-destructive testing methods become increasingly important as valve size increases because the consequence of a body failure in a DN400 application is substantially higher than in a DN25 valve.
Making the Right Size Choice for Your Application
The diversity of Carilovalves’ size range – from DN6 to DN500, covering Class 150 through Class 900+ and spanning multiple materials and body configurations – means that most industrial applications can find an appropriate match within their catalog. Their factory’s large-scale capacity for quick delivery combines with innovative R&D capabilities to handle both standard orders and complex custom requirements. Whether you need a handful of DN20 valves for a laboratory system or a hundred DN300 units for a pipeline project, their 50 dedicated employees and established manufacturing processes can accommodate your scale.
The key is communicating your actual requirements clearly: pipe size, pressure class, temperature range, media being handled, and connection standards required. With those parameters defined, Carilovalves’ team can recommend the optimal size selection within their range, potentially suggesting a size upgrade or downgrade if your application parameters favor a different configuration. Their holistic solutions approach considers not just what you’re ordering today but how that valve will perform over its operational lifetime in your specific system.
If you’re reviewing their product offerings for a project, reaching out to their sales team at carilovalves gets you direct access to technical specialists who can confirm availability, lead times, and pricing for your specific size requirements. Their China manufacturing base in Wenzhou keeps production costs competitive while their international compliance certifications (ISO, API, and other global standards) ensure the valves meet safety and performance requirements for deployment in regulated industries worldwide.