The Grundfos JMK seal is a cartridge mechanical seal specifically designed for Grundfos pumps, such as the CR and CRN series. Its characteristics are as follows:

Performance Parameters: It can operate at a speed of up to 20 m/s, within a temperature range from -30°C to +180°C, and withstand a maximum pressure of 40 bar, enabling it to adapt to a variety of working conditions.
Structural Design: It features a cartridge structure, which simplifies installation and maintenance. There is no need to measure the sealing working length. During installation, simply sleeve it on and tighten the bolts of the sealing cover to ensure the assembly quality and avoid leakage issues during startup.
Sealing Materials: The sealing face materials are typically silicon carbide, tungsten carbide, etc., possessing high hardness, wear resistance, and corrosion resistance. The secondary seal often uses fluorine rubber, ethylene propylene diene monomer (EPDM) rubber, etc., which can adapt to different working media and temperature conditions.
Quality Assurance: The production process strictly adheres to quality control standards. From raw material procurement to finished product inspection, each stage is closely monitored to ensure reliable product quality, stable performance, and a long service life. It usually comes with a warranty period of up to 12 months.

Products Description:

Mechanical seals

1. Auto Cooling Pump Mechanical Seal

2. Mechanical Seals for Sanitary Pumps

3. Flygt Pumps Mechanical Seals

4. Metal Bellow Mechanical Seals

5. PTFE Wedge Mechanical Seals

6. O-ring Mechanical Seals

7. Elastomer Bellow Mechanical Seals

8. Cartridge Mechanical Seals

Pump Mechanical Seal suitable for Grundfos Pump

Product Description

Product name	Pump Mechanical Seal suitable for Grundfo Pump
Item No.	RS
Materials	1.Stationary Ring: Carbon/SIC/TC; 2. Rotary Ring: SIC/TC; 3. Retainer: SUS304/SUS316; 4. Spring: SUS304/SUS316; 5. O-Ring: NBR/EPDM//PTFE
Medium	Water,oil and other weak corrosive medium
Temperature	-20~+150°C
Pressure	≤0.6MPa
Linear velocity	≤10m/s
Application	Rotating equipment,pumps,mixers,agitators and compressors

--- Advantages

1. Wear resistant products

2. Superior sealing effects

3. Low friction

4. Easy replacement

5. Strong QC and R&D teams to assure high quality products

6. Reasonable factory price

7. Small order quantity is welcomed

8. Can help you develop the design based on your idea

9. Customized specifications are welcome

10. OEM and ODM orders are warmly welcome

--- Sealing Ring Main Performance Index

Tungsten Carbide Sealing ring
Density(g/cm3)	14-15
Hardness(HS)	87-91
Elastic Modulus(MPa)	608100
Bend Strength(MPa)	1420-2058
Coefficient of Heat Expansion(10-6/°C)	4.5-6.3
Thermal Condutivity(cal/cm.s.°C)	0.17

Pump Grundfos JMK Mechanical Seal Replacement Cartridge Structure

SIC Sealing ring
Density(g/cm3)	3.00-3.10
Hardness(HS)	110-125
Elastic Modulus(kg/mm2)	42×103
Tensile Strength(kg/mm2)	28
Bend Strength(kg/mm2)	34
Compressive Strength(kg/mm2)	120
Thermal Condutivity(cal/cm.s.°C)	0.3

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