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WB2 Chemical Seal
WB2 Chemical Seal
Specifications
Brand Name :
JG
Model Number :
301
Certification :
FDA certificate
Place of Origin :
Zhejiang, China
MOQ :
1pcs
Price :
USD
Payment Terms :
T/T,Western Union,MoneyGram
Supply Ability :
1000PCS
Delivery Time :
3~10DAYS
Packaging Details :
white box
product name :
WB2 Chemical Seal
Size :
20~100mm
Application :
Chemical pump
Pressure :
up to 0.5Mpa
Temperature :
-10°C to +100°C
Speeds :
15m/s
Metal parts :
SS304,SS316
Type :
WB2
Description
WB2 Chemical Seal

When handling highly oxidizing or corrosive chemical fluids—such as sulfuric acid, hydrochloric acid, strong alkalis, and various oxidizing agents—standard stainless steel mechanical seals often suffer from rapid corrosion failure. The WB2 Series addresses this challenge through a unique outside-mounted (externally mounted) configuration and a PTFE (Teflon) bellows design.

The core advantage of this "Media Isolation" architecture is that all metallic components, including the multiple springs and fasteners, are positioned outside the seal chamber. By ensuring zero contact between metal parts and the corrosive media, the WB2 fundamentally eliminates spring failure caused by chemical attack, crystallization, or debris accumulation. It is the premier choice for chemical centrifugal pumps, reactors, and agitation equipment handling extreme chemicals.

Technical Specifications
Parameter Range / Specifications Industrial Application Insights
Shaft Range 25mm - 80mm / 1.0" - 3.15" Compatible with standard chemical pump & agitator shafts
Max Pressure ≤ 0.5 MPa (5 bar) Specifically optimized for atmospheric or low-pressure media
Temperature -20°C to +120°C Based on the thermodynamic stability of high-grade PTFE
Max Velocity ≤ 10 m/s Ideal for low-to-medium speed rotating equipment
Rotary Face PTFE / SiC Pure PTFE or Glass/Carbon-filled PTFE for enhanced hardness
Stationary Seat Ceramic / SiC High-purity Alumina Ceramic or Reaction Bonded SiC
Secondary Seals PTFE (V-Ring / Square Ring) All-PTFE construction for ultimate chemical inertness
Key Product Advantages
  • Extreme Chemical Inertness: The primary seal body (bellows) is fabricated from high-grade PTFE. It resists virtually all known strong acids, bases, and solvents, except for molten alkali metals and elemental fluorine.
  • External Spring Protection: By exposing the springs to the atmosphere rather than the process fluid, the seal prevents corrosion-related spring "hang-up." This also allows technicians to perform visual inspections of the spring compression and seal status without dismantling the pump.
  • Uniform Load Distribution (Multi-Spring): The multi-spring design provides more precise and uniform axial pressure compared to single-spring variants. This ensures the seal faces maintain a stable micron-level liquid film, even under conditions of minor equipment vibration.
  • Modular Component Design: The rotary seal head and PTFE bellows feature a detachable assembly. This modularity allows for the independent replacement of worn seal faces, significantly reducing long-term MRO (Maintenance, Repair, and Operations) costs.
Expert FAQ & Installation Guidelines
Why is the WB2 Series restricted to operating pressures below 0.5 MPa?
Due to the outside-mounted PTFE bellows structure, internal fluid pressure exerts an outward force that attempts to "blow out" or deform the bellows. For high-pressure, highly corrosive applications, we recommend chemical seals with metallic reinforcement rings or balanced-face geometries.
What are the critical industry-specific details to observe during installation?
Stationary seat perpendicularity is vital. Since PTFE exhibits "cold flow" (creep) characteristics, any misalignment in the face perpendicularity will lead to uneven loading and premature failure. Furthermore, never strike or tap the PTFE surfaces; even a microscopic scratch can become a high-risk leak path.
Can the WB2 seal be operated in a dry-run condition?
No. Although PTFE has inherent self-lubricating properties, the seal faces still require a liquid film (from the media or a flush) to dissipate frictional heat. Dry running will cause a rapid temperature spike, leading to thermal deformation or total destruction of the PTFE components.
Operating Limits
Pressure in the sealed chamber ≤0.5MPa
Temperature in the sealed chamber -10℃~100℃
Linear velocity ≤15m/sec
Additional 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
Product Features
  • The seal is replaceable for BT AR type
  • We have all the mould from 8mm to 70mm, all the rubber mould have LM (our trade mark) printed
  • From shaft size 30mm, we will use metal cup to hold the rubber to avoid its disassembling after long time
  • The color of ceramic could be yellow and white for clients choice
Operating Limits
Shaft diameter Pressure Temperature Sliding velocity
20~100mm up to 0.5Mpa -10~100°C 15m/s
Material Specifications
Component Materials
Rotary Ring Car / SIC/TC/Cer
O-Ring EPDM, NBR, AFLAS, Kalrez, PTFE
Spring and Metal Parts SUS304, SUS316
Stationary Ring Car / SIC /TC/Cer
Applications
  • 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
WB2 Chemical Seal
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Product Detail
Brand Name :
JG
Model Number :
301
Certification :
FDA certificate
Place of Origin :
Zhejiang, China
MOQ :
1pcs
Price :
USD
Contact Supplier
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WB2 Chemical Seal

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

Verified Supplier
8 Years
zhejiang, jiaxing
Since 1992
Business Type :
Manufacturer, Exporter, Trading Company, Seller
Main Products :
Industrial Mechanical Seals, Metal Bellows Seal, Cartridge Mechanical Seal
Total Annual :
10milion-15milion
Employee Number :
80~100
Certification Level :
Verified Supplier
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