Submersible Motors Seal 202UU Water Alkali Pump Seal
Price:
USD
MOQ:
1pcs
Delivery Time:
3~10DAYS
Brand:
JG
Product 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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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Jiaxing Burgmann Mechanical Seal Co., Ltd. Jiashan King Kong Branch
Location
No. 28 No. 28 Chengxi Road, Jiashan County, Jiaxing, Zhejiang, China 314100
Contact Person
Doris Sun