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Submersible Motors Seal 202UU Water Alkali Pump Seal
Submersible Motors Seal 202UU Water Alkali Pump Seal
Specifications
Brand Name :
JG
Model Number :
202UU
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 :
202UU Water Pump Seal
Size :
20~80mm
Application :
Submersible Motors Seal
HS code :
8484200090
Pressure :
0~1.2Mpa
Temperature :
-30°C to 180°C
Speeds :
3000r/mins
Metal parts :
SS304,SS316,904L, Titan
Description
Submersible Motors Seal 202UU Water Alkali Pump Seal

The 202UU Series is a robust, single-spring mechanical seal engineered specifically for the demanding environments of submersible motors and water-alkali pumping systems. Known for its compact axial profile and high reliability, the 202UU is the industry standard for preventing fluid ingress in submersible sewage pumps, fountain pumps, and chemical transfer units handling alkaline solutions.

In submersible applications, the 202UU often functions as the primary barrier within the oil chamber, where it must withstand both the external pressure of the pumped media and the internal lubrication requirements of the motor. For alkali services, our 202UU units utilize specialized material pairings that resist caustic embrittlement, ensuring a leak-free operation in high-pH environments.

Technical Specifications
Parameter Range / Specifications Engineering Application Insights
Shaft Diameter 12mm - 60mm Standard metric sizing for submersible shafts
Max Pressure ≤ 1.0 MPa (10 bar) Suitable for medium-head submersible applications
Operating Temp -20°C to +120°C Stable performance in varied fluid temperatures
Peripheral Speed ≤ 10 m/s Optimized for 2-pole and 4-pole motor speeds
Primary Faces SiC / Tungsten Carbide (TC) Superior hardness for handling grit and alkali crystals
Secondary Seals Viton (FKM) / EPDM High chemical resistance to alkalis and oils
Metal Hardware AISI 304 / 316 Stainless Steel Corrosion-resistant springs and drive components
Key Technical Advantages
  • Dual-Face Reliability (UU Configuration): The "UU" designation signifies a design optimized for dual-application or high-specification material pairings (such as SiC vs. SiC). This is critical for submersible pumps where the seal must resist abrasion from silt and sand while maintaining a tight seal against caustic alkalis.
  • Clog-Resistant Single Spring: The large-diameter open coil spring prevents the accumulation of fibrous debris or alkaline scale. Unlike multi-spring designs, the 202UU spring maintains constant axial pressure even in "dirty" water or slurry-heavy environments.
  • Optimized for Submersible Oil Chambers: Specifically designed to operate effectively within the oil-filled buffer zone of submersible motors, ensuring the secondary seal (O-ring) remains resilient against both the lubricating oil and the external process fluid.
  • Alkali-Resistant Material Science: For pumps handling sodium hydroxide (caustic soda) or other alkaline cleaners, we provide specialized EPDM or Viton elastomers that prevent "swelling" or hardening, which are common causes of seal failure in chemical services.
Expert FAQ & Maintenance
Why is the 202UU preferred over standard component seals for submersible motors?
Submersible motors experience significant thermal expansion and pressure changes. The 202UU features a flexible non-pusher design that accommodates minor shaft axial play and vibration, which are common during the start-stop cycles of submersible equipment.
Which material pairing is recommended for high-concentration alkali pumps?
We strongly recommend Silicon Carbide (SiC) vs. Silicon Carbide faces paired with EPDM secondary seals. EPDM offers superior resistance to alkaline solutions compared to standard Nitrile (NBR), while SiC faces resist the "leaching" effect that chemicals can have on softer materials.
How do I verify the seal's integrity during a motor overhaul?
During maintenance, check for "tracking" or heat checks on the seal faces. In submersible units, ensure the oil in the buffer chamber is not milky; milkiness indicates a breach in the 202UU seal, allowing water or alkali to contaminate the lubricant.
Product Features
  • 202UU Replacement for: Burgmann pump, diving pump and circulating pump
  • Double seal design
  • Unbalanced configuration
  • Independent direction of rotation
  • Multiple springs
  • Conforms to ISO3069 standards
  • Wear resistant with superior sealing effects
  • Low friction operation
  • Easy replacement and maintenance
  • Customized manufacturing available
  • Quality management system certified
  • Professional packaging
  • Wide industrial application range
  • Technical drawings provided for mass production
Operating Limits
Parameter Specification
Shaft Diameter 20-80mm
Pressure 0-1.2 MPa
Temperature -30°C to 180°C
Sliding Velocity 3000 rpm
Material Specifications
Component Materials
Rotary Ring Car / SiC / TC / Ceramic
O-Ring EPDM, NBR, AFLAS, Kalrez, PTFE
Spring and Metal Parts SUS304, SUS316, Titanium, 904L
Stationary Ring Car / SiC / TC / Ceramic
Industrial 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 available
  • Customized mechanical seals according to your drawings or requirements
  • Small quantity orders accepted
  • Excellent quality with competitive pricing
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Submersible Motors Seal 202UU Water Alkali Pump Seal

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Product Detail
Brand Name :
JG
Model Number :
202UU
Certification :
FDA certificate
Place of Origin :
Zhejiang, China
MOQ :
1pcs
Price :
USD
Contact Supplier
Submersible Motors Seal 202UU Water Alkali Pump 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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