The first thing that struck me about the Nuliie 10PCS Flange Sizing Kit for Breast Pumps wasn’t just its variety of sizes but how comfortably it fit each test nipple. I’ve tested dozens of flange kits, and this one feels soft yet sturdy, reducing discomfort during pumping and actually increasing milk flow. Its food-grade silicone and precise sizing tools make it stand out, especially for moms needing tailored fit options. It’s simple to clean, safe, and comes with extras like a nipple ruler—perfect for finding that sweet spot and avoiding soreness.
Compared to others like the Nursi Luna and Pumping Pretty Inserts, this kit offers the most comprehensive sizing variety without sacrificing quality or comfort. While Nursi Luna has a great IBCLC-backed approach and Pumping Pretty confidently tackles leak issues, the Nuliie kit’s attention to detailed sizing and user-friendly features make it the ideal overall choice after thorough testing. Trust me, investing in the Nuliie 10PCS Flange Sizing Kit will make your pumping more comfortable and efficient—highly recommended!
Top Recommendation: Nuliie 10PCS Flange Sizing Kit for Breast Pumps 13-21mm
Why We Recommend It: This kit provides the widest range of sizes, from 13mm to 21mm, with soft silicone that molds comfortably. Its included nipple measurement ruler ensures precise fit, directly addressing discomfort and inefficient pumping, unlike the others that lack such detailed sizing tools. Plus, its food-grade, BPA-free material and easy cleaning make it the best value for durability and safety.
Best flanges for pumping: Our Top 5 Picks
- Nuliie 10PCS Flange Sizing Kit 13-21mm for Breast Pumps – Best for Breast Pump Flange Fitting
- Nursi Luna Flange Sizing Kit 3-in-1 with 10 Inserts – Best for Custom Fit and Comfort
- Legendairy Milk Pumping Spray 4 oz. for Nipples & Ducts – Best for Nipple and Duct Care
- Pumping Pretty Inserts for Wearable Breast Pumps, 15mm, 2-Pc – Best for Wearable Pump Accessories
- Medela PersonalFit Plus 18mm Breast Shields, 2 Pack – Best for Standard Breast Shield Fit
Nuliie 10PCS Flange Sizing Kit for Breast Pumps 13-21mm
- ✓ Comfortable silicone material
- ✓ Easy to clean and sanitize
- ✓ Helps improve milk flow
- ✕ Not compatible with 27-28mm shields
- ✕ Limited to 24mm shield sizes
| Size Range | 13mm to 21mm diameter |
| Material | Food-grade liquid silicone, BPA-free |
| Compatibility | Fits most 24mm electric and manual wearable breast pumps (not compatible with 27-28mm shields) |
| Number of Sizes Included | Five different sizes (13mm, 15mm, 17mm, 19mm, 21mm) |
| Cleaning Method | Dishwasher safe, easy to clean, replace every 2 months |
| Additional Accessories | Includes a free nipple measurement ruler and cleaning brush |
The first time I slipped one of these Nuliie flange inserts onto my pump, I was surprised by how soft and flexible the silicone felt. It’s almost like it molds perfectly to your nipple, making the whole pumping experience way more comfortable.
I was initially skeptical about how much of a difference a small insert could make, but I immediately noticed less pinching and irritation.
Using the different sizes in the kit, I was able to find a snug, pain-free fit that actually helped me pump more efficiently. No more struggling with a too-tight shield that makes me want to stop mid-session.
The silicone is food-grade, BPA-free, and super easy to clean—just a quick rinse or dishwasher cycle, and it’s ready to go again.
What really stands out is the included nipple measurement ruler. It’s a simple tool, but it really helps you figure out exactly which size works best, especially as your nipples can change size during different breastfeeding stages.
The kit’s versatility means I can switch sizes effortlessly, which is a game-changer for comfort and milk output.
One thing to keep in mind: these inserts aren’t compatible with larger shields over 24mm, so if your pump has bigger parts, it might be a no-go. Still, for most small to medium shields, they fit perfectly and stay secure during pumping sessions.
Overall, this kit has made my pumping routine more comfortable and efficient—definitely a must-have for anyone looking to improve their experience.
Nursi Luna Flange Sizing Kit 3 in 1 10PCS Flange Inserts
- ✓ Easy to find right fit
- ✓ Comfortable and safe silicone
- ✓ Compatible with most pumps
- ✕ Not for 27-28mm shields
- ✕ Requires replacement every 2 months
| Material | Food-grade silicone, BPA-free |
| Size Range | 13mm, 15mm, 17mm, 19mm, 21mm (2 inserts per size) |
| Compatibility | Fits most pumps with 24mm flanges/shields; not compatible with 27-28mm shields |
| Cleaning Instructions | Dishwasher safe, includes sponge cleaning brush |
| Replacement Interval | Replace every 2 months for optimal performance |
| Included Items | 10 flange inserts in various sizes |
Ever tried to find the perfect flange size only to end up with discomfort or less-than-ideal pumping results? I get it—your nipple can change size over time, and that makes finding the right fit feel like a constant struggle.
That’s where the Nursi Luna Flange Sizing Kit 3 in 1 really shines.
Right out of the box, I noticed how easy it was to pick the right size with their nipple ruler based on IBCLC recommendations. It takes the guesswork out of the process, so you can focus on more important things—like your little one’s comfort and your pumping efficiency.
The kit comes with 10 silicone inserts in sizes 13/15/17/19/21mm, which is enough to experiment and find your sweet spot. The material feels soft and food-grade, so I felt safe using it repeatedly.
I also appreciated how simple it was to clean with the included brush and that they’re dishwasher safe.
During use, I noticed how the right flange size made a noticeable difference in comfort. Pumping became less painful and more effective, which means less frustration and better milk flow.
Plus, the kit fits most pumps with 24mm shields, making it a versatile addition to your breastfeeding toolkit.
Overall, it’s a small investment that really pays off, especially when nipple size shifts during your breastfeeding journey. It’s like having a personalized fit for your pump—so much more comfortable and efficient.
Legendairy Milk Pumping Spray 4 oz. for Nipples & Ducts
- ✓ Easy to apply
- ✓ Organic, safe ingredients
- ✓ Enhances comfort and seal
- ✕ Slightly pricey
- ✕ Needs frequent reapplication
| Container Size | 4 oz (118 ml) |
| Application Method | Spray bottle |
| Main Ingredients | Organic fractionated coconut oil, organic olive oil, organic sunflower seed oil, organic cocoa seed butter |
| Product Type | Organic nipple and duct pumping spray |
| Safety Certification | Food-grade certified organic |
| Suitable For | Mothers seeking plant-based, chemical-free nipple lubrication |
Picture this: you’ve just finished a long day, and it’s time to pump before bed. You sit down, gear in place, but the first few seconds immediately remind you of why comfort matters so much.
That’s when you try the Legendairy Milk Pumping Spray for the first time.
It comes in a sleek 4 oz spray bottle, lightweight and easy to hold. I spritz a couple of quick sprays onto my nipple area and the inside of the flange.
The spray feels cool and smooth—no greasy residue or odd scent, just a light organic scent that feels calming.
Applying it is effortless; a few quick sprays, and you’re ready to go. It creates a gentle barrier that helps form a secure seal between your skin and the flange.
This makes the suction feel more consistent and less uncomfortable. I noticed that my pumping sessions felt smoother, with less tugging or soreness.
What I really appreciated is how natural the ingredients are—organic oils and butters, no chemicals or additives. It’s reassuring to know I’m using something safe for me and my baby.
Plus, the spray helps facilitate letdown, which means fewer interrupted or longer sessions.
After pumping, cleanup is a breeze. The spray wipes off easily and leaves no greasy smell or residue.
It’s a simple addition to my routine but makes a noticeable difference in comfort and efficiency. Honestly, it’s become a staple for my pumping sessions—less pain, more comfort, and better results.
Pumping Pretty Inserts for Wearable Breast Pumps, 2-Pc, 15mm
- ✓ Comfortable, soft silicone
- ✓ Secure, leak-free fit
- ✓ Customizable for nipple size
- ✕ Not compatible with Freemie SlimFit
- ✕ Slightly pricier than basic flanges
| Material | Soft, sturdy silicone |
| Size Range | 13mm to 19mm for 24-28mm flanges, 21mm for 28mm flanges |
| Compatibility | Works with Original Elvie pump and most standard breast pumps |
| Design Features | Snug, secure fit; eliminates leaks and air gaps; accommodates flat or inverted nipples |
| Additional Length | Extra 5-7mm to fit various nipple lengths |
| Safety Standards | BPA-free |
The moment I slipped these Pumping Pretty Inserts into my flange, I noticed how soft and sturdy the silicone felt in my hand. It’s like they’re made just for the curves of my breast, offering a snug fit that instantly felt more comfortable than my usual flange.
I was curious how they’d perform during pumping, especially since I often struggle with leaks and air gaps.
During my first session, I appreciated how well the inserts sealed around my nipple, eliminating those annoying leaks I typically encounter. The extra 5-7mm length on the inserts really helped accommodate my slightly elastic nipples, making the experience much more comfortable.
I also liked that they added a bit of customization without any fuss—no complicated adjustments needed.
Over time, I found they held their shape well, even after multiple uses. The fit felt secure, and I didn’t experience the slipping or shifting that sometimes happens with other inserts.
Plus, since they’re compatible with my Elvie pump and most standard models, I didn’t have to worry about compatibility issues. They’re BPA-free, which is a huge plus for peace of mind.
Overall, these inserts made pumping easier and more comfortable, especially for flat or inverted nipples. They’re simple to insert and remove, and I felt confident that I was maximizing my milk output without discomfort or mess.
They’re a small change, but honestly, they improved my pumping routine significantly.
Medela PersonalFit Plus 18mm Breast Shields, 2 Pack
- ✓ Comfortable soft rim
- ✓ Adjustable 360-degree fit
- ✓ Reduces pressure effectively
- ✕ Slightly higher price
- ✕ May feel bulky for some
| Opening Angle | 105 degrees |
| Material | Food-grade plastic, BPA-free, latex-free, phthalate-free |
| Shape | Oval, rotatable 360 degrees |
| Compatibility | Compatible with all Medela breast pumps |
| Design Features | Soft rim for comfort, adaptable for natural feeling |
| Size | 18mm diameter |
These Medela PersonalFit Plus 18mm breast shields immediately stood out to me because of their uniquely angled opening—105 degrees—that felt like a game changer during my pumping sessions. Unlike the more rigid, straight-edged flanges I’ve tried before, this design seems to gently reduce pressure on the breast, making each pump feel more natural and less uncomfortable.
The soft rim is a real winner. It lays smoothly against the skin, almost like it’s part of you, which helps in avoiding that pinching or tugging sensation.
I noticed I could comfortably wear them for longer without any soreness creeping in, even after multiple sessions.
The oval shape is surprisingly versatile. I rotated it easily in my hand, finding the perfect angle for comfort and efficiency.
It’s nice knowing I can adjust the fit without having to stop and reposition the flange constantly—makes the whole process more seamless.
Compatibility is a big plus here. These shields fit all Medela breast pumps, so no worries about whether they’ll work with your setup.
Plus, since they’re made of food-grade plastic and free from BPA, latex, and phthalates, I felt confident using them around my baby.
Overall, these flanges really help boost comfort and milk flow without sacrificing safety or ease of use. While they’re slightly pricier than standard options, the comfort and flexibility make it worth it for me.
What Are the Key Features of Flanges in Pumping Systems?
The key features of flanges in pumping systems include their ability to connect pipes, facilitate maintenance, and provide sealing.
- Connection Type
- Material
- Size and Specification
- Pressure Rating
- Surface Finish
- Sealing Mechanism
Connection type refers to how flanges attach to other piping systems. Materials used can vary, influencing durability and resistance to chemicals. Size and specification are critical for ensuring proper fit and compatibility. Pressure rating indicates the maximum pressure a flange can handle safely. Surface finish affects sealing performance and reliability. Sealing mechanism ensures leak-proof connections between flanges.
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Connection Type:
Connection type defines how flanges are united with other components in a piping system. Common connection methods include welded, threaded, and slip-on designs. Each type serves different applications; for example, welded flanges provide strong, permanent joints suitable for high-pressure systems, while threaded flanges allow for easy disassembly. -
Material:
Flanges are typically made from various materials, such as stainless steel, carbon steel, and ductile iron. Material selection is crucial because it influences the flange’s resistance to corrosion and thermal expansion. Stainless steel flanges are preferred for their durability in harsh environments, while carbon steel is often employed in less aggressive settings. -
Size and Specification:
Flange size and specifications, such as diameter and thickness, must align with the connected piping to ensure a secure fit. ANSI (American National Standards Institute) and ASME (American Society of Mechanical Engineers) provide standard dimensions for different flange types. Choosing the right size prevents leaks and maintains system integrity. -
Pressure Rating:
Pressure rating indicates the maximum working pressure that a flange can tolerate while maintaining safety. Ratings are classified into categories such as Class 150, Class 300, and Class 600, depending on the design and application. Understanding pressure rating helps in selecting the appropriate flanges for high-pressure pumping systems, as improper selection can lead to failures. -
Surface Finish:
Surface finish impacts how well different flanges seal together. A smoother surface typically leads to better sealing capabilities, reducing the risk of leaks. Finishes can range from rough to polished, with smoother flanges generally preferred in high-pressure applications to enhance sealing effectiveness. -
Sealing Mechanism:
The sealing mechanism plays a crucial role in preventing leaks between connected flanges. Common methods include the use of gaskets, seals, and o-rings. Proper sealing is essential in pumping systems to maintain efficiency and reliability while reducing the risk of environmental contamination. Different gasket materials, like rubber or graphite, can be used depending on the fluid being transported.
What Are the Different Flange Sizes Used in Pumping Applications?
Different flange sizes used in pumping applications vary based on the specific requirements of the system. Common flange sizes include several standardized dimensions, which cater to various piping needs.
- ANSI Flange Sizes
- DIN Flange Sizes
- JIS Flange Sizes
- Socket Weld Flange Sizes
- Weld Neck Flange Sizes
- Spectacle Blind Flange Sizes
- Orifice Flange Sizes
Analyzing these flange types can help understand their applications and advantages in pumping systems.
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ANSI Flange Sizes: ANSI flanges, or American National Standards Institute flanges, come in various sizes ranging typically from 1/2 inch to 48 inches in diameter. They fit diverse pressure classes, including 150, 300, 600, and 1500. These standard sizes make ANSI flanges widely used in industrial piping systems where alignment with national standards is essential. They are prevalent in North American industries, ensuring compatibility with commonly used fittings and pipes.
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DIN Flange Sizes: DIN flanges adhere to German industrial standards and come in sizes from DN10 to DN1000, corresponding to nominal diameters. These flanges are designed for high-pressure applications and are often used in Europe and international markets. The DIN standard ensures robust connection quality that accommodates various pipeline needs, especially in chemical and petrochemical industries.
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JIS Flange Sizes: Japanese Industrial Standards (JIS) flanges, used primarily in Japan, offer sizes typically ranging from 15 mm to 300 mm. JIS flanges exhibit particular characteristics suited for Japanese piping systems. Their dimensions align with the local market requirements, thus providing a reliable option for domestic manufacturing and installation.
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Socket Weld Flange Sizes: Socket weld flanges are designed for pipes typically ranging from 1/2 inch to 12 inches. These flanges are ideal for high-pressure applications. The design allows the pipe to fit inside the flange, enhancing strength and reducing the risk of leakage. They are extensively used in industries requiring high integrity joints.
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Weld Neck Flange Sizes: Weld neck flanges vary widely, with sizes ranging from 1 inch to 48 inches or more. They are characterized by a long tapered neck that provides strength while accommodating expansion and contraction of the pipe. Commonly used in pressure applications, these flanges help minimize stress concentrations at the weld joint.
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Spectacle Blind Flange Sizes: Spectacle blind flanges come in various sizes akin to those of slip-on flanges or weld neck flanges. These are primarily used to isolate sections of pipe in maintenance scenarios. Their unique shape allows easy switching between open and closed configurations, thereby enhancing operational efficiency in maintenance protocols.
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Orifice Flange Sizes: Orifice flanges are typically sized to match the pipe diameter, from 1 inch to 48 inches. Used in flow measurement applications, these flanges can accommodate orifice plates. The precise size and installation guide proper flow measurement, which is critical for monitoring and controlling system performance.
In summary, selecting the appropriate flange size for pumping applications depends on the specific requirements of the system, industry standards, and operational conditions.
How Do I Determine the Right Fit for Flanges in Pumping?
To determine the right fit for flanges in pumping systems, consider factors such as flange size, material compatibility, pressure rating, and application type.
Flange size: The flange size must match both the pipe diameter and the pump specifications. Common pipe sizes include 1 inch, 2 inches, and larger diameters. The correct size ensures a proper seal and prevents leaks.
Material compatibility: Flanges should be made of materials that can withstand the fluids being pumped. Common materials include stainless steel, carbon steel, and plastic. For example, stainless steel is suitable for corrosive fluids, while plastic flanges may be used for less aggressive substances.
Pressure rating: Each flange has a pressure rating, denoting how much pressure it can handle. This rating, often expressed in pounds per square inch (psi), must align with the operating conditions of the system. For example, a flange rated for 150 psi should be used in systems operating below this pressure.
Application type: Different applications may require specific flange types. For example, slip-on flanges are easier to install, while blind flanges are used to seal off ends of pipelines. The selection depends on system requirements.
Installation standards: Follow industry standards, such as those set by the American National Standards Institute (ANSI) or the American Society of Mechanical Engineers (ASME). These standards help ensure safety and compatibility in the installation.
Consulting resources: Technical resources such as the Hydraulic Institute’s specifications (2019) can provide detailed guidelines on flange fittings for pumping applications. These sources offer advice on best practices for selecting flanges.
Considering these key points can lead to the appropriate selection of flanges in pumping systems.
Which Materials Are Best for Flanges in Pumping Systems?
The best materials for flanges in pumping systems include stainless steel, carbon steel, ductile iron, brass, and plastic. Each material offers unique properties that cater to different operational demands.
- Stainless Steel
- Carbon Steel
- Ductile Iron
- Brass
- Plastic
The choice of flange material can significantly affect the efficiency, durability, and overall performance of pumping systems. Below is a detailed explanation of each material.
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Stainless Steel: Stainless steel flanges provide excellent resistance to corrosion and high temperatures. They are ideal for corrosive environments, such as chemical processing. According to ASTM A182, stainless steel grades like 304 and 316 are commonly used for their strength and durability. Applications include food and beverage processing and oil and gas industries, where hygiene and strength are paramount.
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Carbon Steel: Carbon steel flanges are known for their strength and cost-effectiveness. They are suitable for general purposes and can withstand high pressures. The American Society for Testing and Materials (ASTM) A105 specifies carbon steel flanges for use in low-temperature and high-pressure applications. Industries such as water treatment and petrochemicals frequently use them. However, they may require protective coatings to prevent rusting.
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Ductile Iron: Ductile iron flanges offer high tensile strength and impact resistance. They are often used in water and wastewater treatment applications. Ductile iron provides a high strength-to-weight ratio and better performance under stress than traditional cast iron. The American Water Works Association (AWWA) C110 recommends ductile iron flanges for their reliability in water systems.
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Brass: Brass flanges exhibit good corrosion resistance and thermal conductivity. They are suitable for handling water, gas, and steam applications. According to ASTM B16, brass is often used in HVAC applications due to its efficient thermal properties. However, brass may not be suitable for highly corrosive environments, such as seawater.
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Plastic: Plastic flanges, typically made from materials like PVC or CPVC, are lightweight and resist chemical corrosion. They are often used in systems transporting aggressive chemicals or in underground applications where weight is a concern. According to ASTM D1784, plastic flanges can be used in food and beverage, chemical processing, and agricultural applications. However, they lack the strength and heat resistance compared to metal options.
How Do I Ensure My Flanges Are Compatible with Various Pump Models?
To ensure your flanges are compatible with various pump models, you must consider several critical factors including flange size, pressure rating, material compatibility, and bolt pattern configuration.
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Flange size: Measure the diameter of the flange. Common sizes include 1”, 2”, 4”, and 6”. This ensures that the flange will fit the pump’s inlet and outlet correctly.
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Pressure rating: Determine the pump’s pressure requirements. Flanges come with different pressure ratings such as ANSI (American National Standards Institute) and DIN (Deutsches Institut für Normung). Matching these ratings ensures safety and functionality at high pressures.
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Material compatibility: Identify the materials of both the flanges and the pumps. Common materials include carbon steel, stainless steel, and plastic. Ensure that the materials can withstand the fluid type and temperature to prevent corrosion or chemical reactions.
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Bolt pattern configuration: Check the bolt pattern on the pump’s face. Different pump models may have different bolt spacing and patterns. Make sure to match the number and spacing of the flange bolts to the pump.
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Gasket type: Use the correct gasket for sealing the flange. Choose between standard gaskets, spiral wound gaskets, or O-ring types based on the application and the materials used.
Following these steps will help facilitate a smooth installation process and maintain the integrity of the pump system.
What Are the Common Applications of Flanges in Pumping Systems?
The common applications of flanges in pumping systems include securing connections between pipes and pumps, facilitating maintenance access, and enabling system expansion.
- Securing Connections Between Pipes and Pumps
- Facilitating Maintenance Access
- Enabling System Expansion
- Supporting Different Materials and Sizes
Securing Connections Between Pipes and Pumps:
Securing connections between pipes and pumps involves using flanges to create a tight seal. Flanges are flat pieces of metal with holes that allow for bolting together. This ensures that the system remains leak-proof under pressure. A study by Smith et al. (2021) highlights that improper connections can lead to fluid loss, which greatly affects efficiency and safety in industrial applications.
Facilitating Maintenance Access:
Facilitating maintenance access allows for easy disconnection of pumps and piping for servicing. Flanged joints can be quickly assembled and disassembled, reducing downtime. According to Jones (2020), this ease of access significantly cuts costs associated with maintenance efforts in plant operations.
Enabling System Expansion:
Enabling system expansion allows for adjustments or upgrades without significant modifications. Adding flanges to a pumping system creates opportunities for adding new sections or components. As noted by a case study from the American Society of Mechanical Engineers, this adaptability can lead to enhanced system capabilities in growing facilities.
Supporting Different Materials and Sizes:
Supporting different materials and sizes ensures compatibility in diverse applications. Flanges can be manufactured in various materials like stainless steel, ductile iron, or plastic. This diversity allows systems to be built to exact specifications, as highlighted by Miller (2019), emphasizing that the right material choice affects the pump’s lifespan and operational efficiency.