LABGLASS LG-8076-104 Neck Ring Flange Reaction Vessel Cover 29/42

( Brand: Labglass ), ( Manufacturer Part Number: LG-8076-104 ), ( Part Type: Ring Cover Flange )

Review LABGLASS Neck O ring Flange Reaction Vessel Cover 29/42

The **Labglass LG-8076-104 Neck O-Ring Flange Reaction Vessel Cover (29/42 Joint)** is a precision-engineered component designed for high-performance chemical synthesis, pharmaceutical development, and laboratory-scale reactions requiring robust sealing and secure closure. Crafted from high-quality borosilicate glass (Type 3.3, meeting ASTM E438 standards), this vessel cover is engineered to withstand extreme thermal and pressure fluctuations, making it ideal for applications such as distillation, extraction, polymerization, and solvent recovery. The **29/42 ground glass joint** ensures a leak-proof, airtight seal when properly coupled with a matching neck, preventing contamination and ensuring the integrity of the reaction environment. The **O-ring flange design** enhances durability by distributing pressure evenly across the joint, reducing the risk of cracking or shattering under stress, while also simplifying assembly and disassembly for routine maintenance or sample retrieval.

This cover is equipped with a **smooth, polished surface** to minimize residue buildup and facilitate easy cleaning, a critical feature in laboratories where sterility and precision are paramount. The **reinforced rim** provides structural stability, allowing the vessel to endure vigorous stirring, refluxing, or heating without compromising the seal. Additionally, the **compatible 29/42 joint** ensures seamless integration with a wide range of Labglass reaction vessels, flasks, and condensers, offering versatility for various experimental setups. Whether used in academic research, industrial R&D, or pharmaceutical manufacturing, this vessel cover delivers reliability, chemical resistance, and long-term performance, making it an indispensable component for any laboratory requiring precise and secure reaction containment. Its durable construction and precise engineering ensure consistent results across a broad spectrum of chemical processes, from routine synthesis to high-temperature reactions.

### **Pros and Cons of buying a Labglass LG-8076-104 (Neck O-Ring Flange Reaction Vessel Cover, 29/42 Joint)**

1. **Compatibility with Standard Lab Equipment** The 29/42 joint is a widely used standard in laboratory glassware, making it easy to integrate with other glassware, condensers, and adapters. This reduces the need for custom fittings and simplifies setup.

2. **Sealing Reliability** The O-ring flange design ensures a secure, leak-proof seal when properly installed. This is critical for reactions involving volatile or hazardous chemicals, as it minimizes the risk of spills or contamination.

- Distillation

- Reflux reactions

- Stirred or heated reactions

- Vacuum or pressure applications (within safe limits)

The cover can be used with reaction vessels like round-bottom flasks, reaction kettles, or other glassware with matching joints.

4. **Durability** High-quality borosilicate glass (likely Type 3.3 or similar) resists thermal shock and chemical corrosion, ensuring long-term use even under demanding conditions.

5. **Easy to Clean and Maintain** Glass surfaces are non-reactive and can be easily cleaned with solvents or detergents. The O-ring (typically made of silicone or Viton) can be replaced if worn, extending the cover s lifespan.

6. **Pressure and Vacuum Tolerance** Designed to handle moderate pressure and vacuum conditions, making it useful for processes requiring controlled atmospheres.

7. **Cost-Effective for Standard Needs** Compared to custom or high-end metal-sealed systems, this glass cover offers a balance of performance and affordability for routine laboratory work.

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1. **Limited Pressure and Temperature Range** While suitable for many lab applications, the glass joint and O-ring have specific pressure and temperature limits (typically up to 100 C and moderate pressure). Exceeding these can lead to leaks, seal failure, or glass breakage.

2. **Manual Assembly Required** Unlike some metal-sealed systems, this cover must be carefully aligned and tightened by hand. Over-tightening can damage the O-ring or joint, while under-tightening risks leaks.

3. **O-Ring Wear Over Time** The O-ring will eventually degrade due to exposure to solvents, heat, or repeated use. Replacement parts may be needed, adding to long-term costs.

4. **Not Ideal for Aggressive Chemicals** While borosilicate glass resists most acids and bases, highly corrosive or abrasive substances (e.g., hydrofluoric acid, strong alkalis at high temperatures) may degrade the glass or O-ring over time.

5. **Bulk and Fragility** Glass components are heavier and more fragile than plastic or metal alternatives. They require careful handling during transport and use, increasing the risk of breakage.

6. **Limited Customization** Unlike metal-sealed systems, this cover is not easily modified for specialized applications (e.g., custom ports or high-pressure needs). Custom adapters may be required for non-standard setups.

7. **Potential for Leaks Under Extreme Conditions** In high-vacuum or high-pressure applications beyond the cover s rated limits, even a well-sealed O-ring may fail, leading to equipment damage or safety hazards.

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The **Labglass LG-8076-104 (29/42 joint O-ring flange cover)** is a **practical and cost-effective choice** for laboratories requiring a reliable, standard-compatible reaction vessel cover for routine processes like distillation, reflux, or stirred reactions. Its **sealing efficiency, compatibility with common glassware, and durability** make it ideal for general lab use. However, it is **not suitable for extreme conditions** (e.g., high pressure, aggressive chemicals, or high temperatures beyond its limits), where metal-sealed or custom systems would be more appropriate.

For most **academic, teaching, or small-scale industrial labs**, this cover offers an excellent balance of performance and affordability. If your application involves **high pressure, corrosive chemicals, or extreme temperatures**, consider alternative sealing methods (e.g., metal clamps, PTFE-lined flanges, or high-pressure glassware).

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- You need a **standard 29/42 joint cover** for routine reactions (e.g., organic synthesis, distillation, reflux).

- Your applications involve **moderate temperatures and pressures** (within the cover s rated limits).

- You prioritize **glass compatibility** with other lab glassware and easy cleaning.

- Budget is a consideration, and you can replace the O-ring as needed.

- Your work involves **high pressure, vacuum, or extreme temperatures** (e.g., >100 C or >1-2 bar pressure).

- You handle **highly corrosive chemicals** that may degrade the O-ring or glass.

- You require **custom ports, high durability, or metal-sealed reliability** (e.g., for pilot-scale or industrial processes).

- You frequently work with **volatile or hazardous substances** where even minor leaks could pose a risk.

For **long-term or high-stakes applications**, investing in a **metal-sealed reaction vessel** (e.g., with PTFE gaskets or high-pressure clamps) may be worth the extra cost for added safety and reliability.

Details:

Includes Neck O-Ring Flange Reaction Vessel Cover 29/42 as pictured. Photos are of the actual unit for sale. Privacy: Rest assured your information will not be given, sold, rented or loaned to any third party. Item will come with a 30 Day Warranty.

Shipping Details: originates from zip code 95742. Cosmetically in good condition showing minor scuffs / scratches blemishes from previous use. If a custom power cord or AC adapter is required for the item, it only included if pictured described above. Item was recently removed from working service and is in excellent order.

part #: lg8076104 price

• $299.99

specifications plasticwarelabsuppy:

• brand: Labglass
• mpn: Lg-8076-104
• part type: Ring Cover Flange

seller plasticwarelabsuppy:

• city: Rancho Cordova, California
• # reviews: 43739
• rating: 99.8%

payments plasticwarelabsuppy:

• wallet: Google-pay
• credit card: Diners-club
• other

general plasticwarelabsuppy:

• condition: Used
• Medical, Lab Dental Supplies > Glassware Plasticware > Other Medical Lab Glassware

shipping plasticwarelabsuppy:

• service: Standard, Expedited, Overnight
• cost: $0.00
• transit: 3-7 Days
• class: Standard, Expedited, One-day
• type: Fixed

returns plasticwarelabsuppy:

• time: 30 Days
• method: Money back
• policy: Returns Accepted
• paid by: Seller

offer plasticwarelabsuppy:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• started: May 12, 2026

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