Description

Mechanical Seal Grundfos Type GLF-04

General Information

• Type: Mechanical Seal (Pump Shaft Seal)
• Series: GLF-04
• Application: Grundfos centrifugal pump systems (GLF series and equivalent models)
• Available Sizes: 12 mm & 16 mm shaft diameter
• Design: Balanced mechanical seal (improved heavy-duty variant)

Specifications

• Shaft Sizes: 12 mm / 16 mm
• Operating Pressure: Up to approx. 3.0 MPa (30 bar equivalent)
• Temperature Range: -20°C to +180°C (depending on elastomer selection)
• Sliding Speed: Up to 15 m/s
• Design Type: Balanced seal for high stability under pressure and load

Materials

• Seal Faces: Silicon Carbide (SiC) / Tungsten Carbide (TC) / Carbon
• Stationary Ring: Silicon Carbide / Ceramic
• Rotary Ring: Carbon / Silicon Carbide
• Elastomers: NBR / EPDM / FKM (Viton) / PTFE
• Metal Parts / Springs: Stainless Steel (SS304 / SS316)

Design Features

• Enhanced balanced design for improved pressure handling
• Strong resistance to wear, corrosion, and thermal stress
• Suitable for continuous and demanding operation
• Stable sealing performance under fluctuating conditions
• Compact construction for easy installation and replacement
• Available in 12 mm and 16 mm shaft sizes

Applications

• Grundfos GLF pump series
• Industrial centrifugal pump systems
• Water supply and pressure boosting systems
• HVAC and cooling circulation systems
• Industrial utility water systems
• Light chemical and process fluid applications