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

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Submersible Motors Seal 202UU Water Alkali Pump Seal

Name: Submersible Motors Seal 202UU Water Alkali Pump Seal
Brand: Jiaxing Burgmann Mechanical Seal Co., Ltd. Jiashan King Kong Branch
SKU: 202UU
Price: 46.00 USD
Availability: InStock

Product Details

Place of Origin: Zhejiang, China

Brand Name: JG

Certification: FDA certificate

Model Number: 202UU

Payment & Shipping Terms

Minimum Order Quantity: 1pcs

Price: USD

Packaging Details: white box

Delivery Time: 3~10DAYS

Payment Terms: T/T,Western Union,MoneyGram

Supply Ability: 1000PCS

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Specifications

Description

Specifications

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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Submersible motor water pump seal, Alkali resistant mechanical seal, 202UU double mechanical seal
                                                  

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

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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