Jiaxing Burgmann Mechanical Seal Co., Ltd. Jiashan King Kong Branch

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GLF-SA Mechanical Seal Grundfos CM CRK Pump Seal

Name: GLF-SA Mechanical Seal Grundfos CM CRK Pump Seal
Brand: Jiaxing Burgmann Mechanical Seal Co., Ltd. Jiashan King Kong Branch
SKU: GLF-SA
Price: 14.00 USD
Availability: InStock

Product Details

Place of Origin: Zhejiang, China

Brand Name: JG

Certification: ISO9001

Model Number: GLF-SA

Payment & Shipping Terms

Minimum Order Quantity: 10 Pieces

Price: USD 3-25 / Piece

Packaging Details: Carton Packaging with Foam Protection

Delivery Time: 7-15 Working Days

Payment Terms: T/T,Western Union,

Supply Ability: 10,000 Pieces / Month

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Specifications

Description

Specifications

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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              GLF-SA Mechanical Seal, Grundfos CM CRK Pump Seal, Long Spring O Ring Type Seal
                                                  

Product Name:	GLF-SA Mechanical Seal	Application:	Grundfos CM CRK Pump
Seal Type:	Unbalanced, O-Ring Type, Long Spring	Shaft Diameter:	12 Mm / 16 Mm
Friction Pair Material:	Carbon / Silicon Carbide / Tungsten Carbide	Max Working Pressure:	3 MPa
Temperature Range:	-20°C ~ 180°C	Sliding Velocity:	≤15 M/s

Product Name:	GLF-SA Mechanical Seal
Application:	Grundfos CM CRK Pump
Seal Type:	Unbalanced, O-Ring Type, Long Spring
Shaft Diameter:	12 Mm / 16 Mm
Friction Pair Material:	Carbon / Silicon Carbide / Tungsten Carbide
Max Working Pressure:	3 MPa
Temperature Range:	-20°C ~ 180°C
Sliding Velocity:	≤15 M/s

Description

GLF-SA Mechanical Seal Grundfos CM CRK Pump Seal

The GLF-SA mechanical seal is a long spring O-ring type shaft seal designed for Grundfos CM horizontal pumps and CRK multistage pumps with 12 mm and 16 mm shafts. It fits Grundfos CM 1/3/5, CM 10/15/25, CRK2, CRK4, CRK8 and CRK16 models, making this seal a direct replacement that restores original pump performance without adaptation.

The long spring O-ring construction features a rigid torque transmission design required for hard material pairings such as WC/WC or SiC/SiC, even where lubrication is poor, and the unbalanced seal geometry keeps installation simple and reliable.

The seal operates at pressures up to 3MPa, media temperatures from -20°C to 180°C and sliding velocities up to 15 m/s, covering both standard CM pump duty and demanding CRK multistage applications. The rotary and stationary rings can be selected from carbon, silicon carbide and tungsten carbide, with O-rings in EPDM, NBR, AFLAS, Kalrez or PTFE and springs and metal parts in SUS304, SUS316 or Hastelloy C. For high-temperature service we recommend heat-resistant elastomer compounds. Every GLF-SA mechanical seal is 100% pressure-tested before shipment and backed by our ISO9001 quality management system.

Technical Parameters

Parameter	Value
Model	GLF-SA (GLF / GLF-2 compatible)
Shaft Diameter	12 mm / 16 mm
Working Pressure	up to 3 MPa
Media Temperature	-20 °C ~ 180 °C
Sliding Velocity	≤ 15 m/s
Seal Type	Unbalanced, O-Ring Type, Long Spring
Fits Pumps	Grundfos CM 1/3/5, CM 10/15/25, CRK2/4/8/16
Rotary / Stationary Ring	Carbon / Silicon Carbide / Tungsten Carbide
O-Ring	EPDM / NBR / AFLAS / Kalrez / PTFE
Spring and Metal Parts	SUS304 / SUS316 / Hastelloy C

Applications

Grundfos CM horizontal and CRK multistage pumps
Water supply and pressure boosting systems
Irrigation and agricultural pumping
HVAC circulation and industrial water systems

Key Advantages

Direct replacement for Grundfos CM and CRK pumps, no pump adaptation needed
Long spring O-ring design with rigid torque transmission for hard face pairings
Spring unit averted from the product, no sticking or clogging
Suitable for pressure reversals and vacuum operation
Small installation sizes, best for conversions
OEM/ODM service and cross-reference for Grundfos part numbers

Product Q&A

Q1: Which Grundfos pumps does the GLF-SA mechanical seal fit?

A1: The GLF-SA fits Grundfos CM horizontal pumps such as CM 1/3/5 and CM 10/15/25, and CRK multistage pumps including CRK2, CRK4, CRK8 and CRK16. Only two shaft sizes are used across this range, 12 mm and 16 mm, which keeps the GLF-SA mechanical seal simple to stock and quick to fit.

Q2: What is the advantage of the long spring O-ring type design?

A2: The long spring provides stable axial load over the full wear range of the seal faces, while the O-ring secondary seal gives a rigid torque transmission structure. This combination is required for hard material pairings such as tungsten carbide against tungsten carbide or silicon carbide against silicon carbide, which perform reliably even where lubrication is poor.

Q3: What are the operating limits of this GLF-SA seal?

A3: The GLF-SA mechanical seal handles pressures up to 3MPa, media temperatures from -20°C to 180°C and sliding velocities up to 15 m/s. For high-temperature media we recommend selecting heat-resistant elastomers such as AFLAS, Kalrez or PTFE for the elastomers.

Q4: Can I get a customized GLF-SA mechanical seal for my pump?

A4: Yes. We offer OEM/ODM production of the GLF-SA mechanical seal, including custom face materials, elastomer options, special metal parts and private label packaging. Cross-reference service for OEM part numbers is available, and samples can be supplied before mass production.

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GLF-SA Mechanical Seal Grundfos CM CRK Pump Seal