Rubber Bellows Mechanical Seal Replace John Crane 2100

Operating Limited:

Material:

Advantages:

• Spring unit averted from the product so no sticking and clogging of the springs
• Safe operation (no fractures) because of seal face locking by square pin
• Suitable for pressure reversals
• Operation in vacuum without additional seat locking possible
• No damage of the shaft by a dynamically loaded O-Ring
• Small installation sizes
• Best suitable for conversions, no adaptations of the pump
• Insensitive to solid containing and abrasive media
• Advantages of a balanced seal even with plain shafts
• Insensitive to shaft movements because of the stationary design

Application:

• Water and waste water technology
• Chemical industry
• Refining technology
• Dirty, abrasive and solid containing media
• Fugitive hydrocarbons (no API seal!)
• Sticky and stringy media
• Chemical standard pumps
• Sewage pumps

Shipping & Payment Terms:

Port of Loading: Shanghai

Shipping Method: DHL,UPS,FEDEX,TNT, etc

Payment Terms: T/T, Western Union, money gram

Our services:

◆ OEM/ODM orders are available for our factory

◆ Accept customized mechanical seals according to your drawing or requirements

◆ Small quantity is accepted

◆ Provides excellent quality with competitive price

Q1: What makes the John Crane 2100 equivalent mechanical seal a reliable choice?

A: This seal features a flexible elastomer bellows design, ensuring superior axial movement compensation and vibration resistance. Its carbon or silicon carbide (SiC) sealing faces provide excellent wear resistance, while NBR/FKM/EPDM elastomers offer broad chemical compatibility, making it ideal for harsh industrial environments.

Q2: What pressure and temperature ranges does this seal support?

A: It operates reliably under pressures up to 10 bar (1.0 MPa) and temperatures from -20°C to +150°C (extendable to 200°C+ with FKM bellows), ensuring performance in demanding applications like hot water, steam, or chemical processing.

Q3: Which materials are available for different media?

A:

• NBR (Nitrile): Best for oils, water, and mild chemicals.

• FKM (Fluorocarbon): Resistant to acids, fuels, and high temps.

• EPDM: Ideal for steam, hot water, and alkaline solutions.

• Seal Faces: Choose carbon (economical) or SiC (high wear resistance).

Q4: Is this seal compatible with OEM John Crane 2100 models?

A: Yes, it’s a direct replacement for John Crane 2100 seals, matching dimensions (16–120mm shaft sizes) and performance standards while offering cost savings without compromising quality.

Q5: How do I ensure proper installation for leak-free operation?

A:

• Use Permatex #3 sealant for easy disassembly or Three Bond 1184 for stronger adhesion.

• Follow manufacturer-specified compression levels to avoid over-tightening.

• Inspect the seal cavity post-installation for leaks (check shift lever area).

Q6: Where is this seal commonly used?

A: It’s widely applied in:

• Chemical pumps (acid/alkali resistance with FKM/EPDM).

• Water treatment & HVAC systems (NBR for general use).

• Food processing (EPDM for steam cleaning compatibility).