Carbon graphite mechanical seal assemblies are drop-in OEM-interchangeable grundfos pump mechanical seals for CR, CRN, NK, TP and CHI series circulators and multistage boosters. Featuring self-lubricating FDA-grade carbon graphite rotating faces paired with tungsten carbide or SiC stationary seats, they resist thermal cycling in HVAC and domestic water duty, tolerate brief dry-run, and ship factory-direct from our ISO 9001 workshop at wholesale cost.
Key Features
• Grundfos Replacement: Replaces the standard "A-Type" or "B-Type" O-ring seals found in Grundfos TP, NB, and NK end-suction pumps with a premium carbon graphite mechanical seal assembly for extended service life and reduced leakage risk.
• Optimized for Water: Carbon Graphite vs. Silicon Carbide (or Ceramic) is the ideal pairing for clean water circulation, HVAC, and pressure boosting.
• Quiet Operation: The low friction of carbon faces ensures quiet, squeak-free operation for grundfos pump mechanical seals, making them essential for pumps in residential or commercial buildings where noise control is critical.
• Energy Efficiency: Carbon's low coefficient of friction consumes less power than hard-face combinations, contributing to the overall efficiency of the pump system.
• Flexible Drive: The rubber bellows or O-ring drive mechanism in this carbon graphite mechanical seal absorbs minor shaft vibrations, protecting the brittle carbon face from fracture during start-up or pressure fluctuations.
Product Specifications
Graphite chemical property | ||||||||
Category | Model | Density (g/cm) | Fractural Strength (MPa) | Compressive Strength (MPa) | Shaw Hardness (HS) | Porosit y(%) | Temperature (℃) | |
Carbon-graphite | Impregnated Epoxy Resin (H) | M106H | 1.75 | 65 | 200 | 85 | <1 | 250 |
M120H | 1.7 | 60 | 180 | 80 | <1 | 250 | ||
Impregnated Furan Resin (K) | M106K | 1.75 | 67 | 200 | 90 | <1 | 250 | |
M120K | 1.7 | 62 | 180 | 85 | <1 | 250 | ||
Impregnated Phenol Aldehyde Resin (F) | M106F | 1.75 | 60 | 200 | 85 | <1 | 250 | |
M120F | 1.7 | 55 | 180 | 80 | <1 | 250 | ||
Antimony Carbon (D) | M106D | 2.3 | 65 | 220 | 90 | <1.5 | 400 | |
M120D | 2.3 | 60 | 220 | 90 | <1.5 | 400 | ||
M254D | 2.3 | 55 | 210 | 65 | <1.5 | 450 | ||
Operating Limits | Units | M106D |
Imperegnated material | Slibium-allay | |
Shaw Hardness | HS | ≥90 |
Indicated Parosity | % | ≤2.0 |
Volume Density | g/m³ | ≥2.20 |
Compressive Strength | Mpa | ≥240 |
Flexural Strength | Mpa | ≥70 |
Coefficient Of Heat Expansion | 10-6·1/℃ | 7.2 |
Using Temperature | ℃ | ≤400 |
Workshop
This workshop is equipped with professional processing equipment and integrated with standardized material warehousing management, enabling a one-stop production process from precision machining of carbon graphite mechanical seal components to finished product delivery. Specialized production lines for Grundfos pump mechanical seals ensure part machining accuracy and production efficiency, meeting various high-specification manufacturing requirements for OEM-interchangeable replacements.
Product Research, Development and Testing
Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All grundfos pump mechanical seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.
Industry Solutions
Case Study
Office Building HVAC: Cooling pumps in an office block were noisy due to face vibration. We replaced the old seals with our Grundfos Carbon/SiC seals. The self-lubricating carbon silenced the noise and has run leak-free for 2 years.
Testimonials
We service hundreds of Grundfos TP pumps. These carbon seals are our standard stock item. Reliable and priced right for the repair market.
—Pump Service Center, Germany
FAQs
Q: Does this replace the BAQE code?
A: Yes, BAQE is the Grundfos code for Carbon/SiC/EPDM. Our seal is a direct functional replacement, offering the same material properties and dimensional fit.
Q: Are carbon graphite mechanical seals direct drop-in replacements for Grundfos CR, CRN, NK, TP and CHI series pumps?
A: Yes. Our carbon graphite mechanical seal follows the original OEM envelope dimensions, shaft size and bolt pattern—no pump modification required. They are fully interchangeable with Grundfos genuine "A-Type" and "B-Type" O-ring seal configurations for CR, CRN, NK, TP and CHI series multistage and end-suction pumps.
Q: What makes carbon graphite the preferred material choice for Grundfos pump mechanical seals in water and HVAC applications?
A: Self-lubricating carbon graphite faces provide quiet, squeak-free operation essential for residential and commercial buildings. They also tolerate brief dry-run during system priming, resist thermal cycling from cold makeup water to hot recirculation, and cost significantly less than silicon carbide alternatives.
Q: How does the rubber bellows or O-ring drive mechanism protect the carbon graphite seal face during pump operation?
A: The rubber bellows or O-ring drive mechanism in our Grundfos pump mechanical seals absorbs minor shaft vibrations and misalignment, preventing the brittle carbon graphite face from fracturing during start-up, pressure fluctuations or occasional cavitation events. This extends seal life and reduces unplanned maintenance downtime.
Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.
E-mail: gechacha@aliyun.com
Mobile: +86-18758835650
WhatsApp: +86-18758835650
Add: No8-2, Jinsha road Yuelin Street, Fenghua District, Ningbo, Zhejiang
