• Shaft Protection: The internal rubber sleeve acts as a protective barrier between the metal drive components and the pump shaft, completely eliminating fretting corrosion.
• Balanced Geometry: The seal faces are hydraulically balanced to handle the high pressures (up to 25 bar) typical of multistage booster systems without overheating.
Key Features
• H-Type Replacement: A fully assembled cartridge unit designed to replace the standard "H-Type" seals (HQQE, HQQV) found in Grundfos CR, CRI, and CRN vertical multistage pumps.
• Elastomer Sleeve Drive: Utilizes a robust rubber bellows/sleeve inside the cartridge to grip the shaft, transmitting torque without damaging the shaft surface.
• Speed & Simplicity: The cartridge design allows for seal replacement in under 20 minutes without completely disassembling the pump motor in many models.
Technical Specs | Materials | ||
Temperature | -30℃ to 200℃ | Stationary Ring | Sic/TC/Carbon |
Rotary Ring | Carbon/Sic/TC | ||
Pressure | ≤1.2MPa | Secondary Seal | NBR/EPDM/Viton |
Speed | ≤10m/s | Spring and Metal Part | Stainless Steel |
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 to finished product delivery. It ensures part machining accuracy and production efficiency, meeting various high-specification manufacturing requirements.
Product Research, Development and Testing
Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All 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
High-Rise Booster: A residential tower's water booster pumps were leaking. The OEM seals were worn. We installed these Rubber Cartridge Replacements. The EPDM rubber provided excellent drinking water compliance, and the cartridge format minimized system downtime.
Testimonials
These cartridges save us hours on every service call. They slide right onto the Grundfos shafts and lock in perfectly.
—Pump Service Contractor, UK
FAQs about Metal Bellows Seals for High Temperature Pumps
Q: Is this compatible with the new Grundfos E-pumps?
A: Yes, the seal chamber dimensions for CR/CRI/CRN pumps have remained consistent. Our cartridge fits both standard and E-pump (smart pump) variants of the same shaft size.
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
