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Jiaxing Burgmann Mechanical Seal Co., Ltd. Jiashan King Kong Branch
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Single Big Spring Water Pump Seal With Solid Sic Less Leak
This single big spring water pump seal utilizes a robust, heavy-duty helical spring to provide a consistent axial closing force on the seal faces. The primary sealing rings are constructed from monolithic, solid silicon carbide (SiC) on both the rotating and stationary faces. This material combination offers exceptional resistance to abrasive particles, providing superior wear characteristics and extended service life in harsh water applications, including those with suspended solids. The simple, large-spring design enhances stability and reduces the risk of clogging in dirty water environments. The exceptional hardness and low friction coefficient of the solid SiC faces minimize heat generation and wear, directly resulting in a significantly lower leak rate compared to seals with carbon/graphite or reaction-bonded SiC faces. This design is engineered for reliability in general industrial water, cooling, and low-pressure transfer pumps.
Features
For plain shafts
Single seal
Unbalanced
Conical spring rotating
Dependent on direction of rotation
Advantages
Economical seal solution
No damage of the shaft by set screws
Short installation length possible (G16)
Operating range
Temperature:
–20 °C ~ 140 °C (–4 °F ~ 355 °F)
Pressure:
up to 145 psi(g)/10 bar(g)
Speed:
15m/s (3000fpm)
Axial movement:
±1.0 mm
Recommended applications
Water and waste water technology
Building services engineering
Water pumps
Heating circulation pumps
Materials
Seal face:
Carbon graphite resin impregnated
Seat G9:
Silicon carbide, Special cast CrMo steel, Aluminium oxide
Product variants
M2
Rotating unit M2 with seat G4 or G16 (shorter installation length)
Seal face: Carbon graphite resin impregnated
Seat G4: Silicon carbide, Special cast CrMo steel
Seat G16: Silicon carbide, Special cast CrMo steel, Aluminium oxide
M2N4
Rotating unit M2 with seat G6
Seal face: Carbon graphite resin impregnated
Seat G6: Silicon carbide, Special cast CrMo steel
Frequently Asked Questions
Q1: What is the key material advantage of solid silicon carbide (SiC) seal faces in abrasive water applications?
A1: Solid SiC possesses extreme hardness (Knoop 2600 kg/mm²) and high thermal conductivity, which provides exceptional resistance to abrasive wear. This minimizes face erosion and maintains face flatness, directly leading to a lower and more stable leak rate over the seal's lifespan compared to softer materials like carbon graphite.
Q2: How does the single spring design impact maintenance and serviceability?
A2: The simplicity of the single large spring design offers improved resistance to clogging from silt or debris in raw water. It also simplifies inspection and handling during maintenance procedures, as there are no multiple small springs to corrode or lose.
Q3: What is the primary limitation of a single big spring design regarding operational speed?
A3: The primary limitation is centrifugal unweighting. At high rotational speeds, centrifugal forces can act on the large spring, reducing its effective closing force on the seal faces. This makes the design generally unsuitable for very high-speed applications, where a multi-spring design is preferred.
Q4: Why is this seal type particularly suited for raw water and cooling water services?
A4: Its suitability stems from the combination of the clog-resistant single spring and the highly abrasion-resistant solid SiC faces. This configuration reliably handles suspended solids without the failure modes associated with multi-spring seals (clogging) or carbon faces (erosive wear).
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Trading Company,Seller
Year Established:
1992
Total Annual:
10milion-15milion
Employee Number:
80~100
Ecer Certification：
Verified Supplier
JIAXING BURGMANN is a professional manufacturer of mechanical seal for pump and autoclave used in the mining, industry, agriculture, flange, rubber ring, bushing, hard alloy and Sic. We are specialized in producing Burgmann series seals.
We have over 20 years production experience, wit... JIAXING BURGMANN is a professional manufacturer of mechanical seal for pump and autoclave used in the mining, industry, agriculture, flange, rubber ring, bushing, hard alloy and Sic. We are specialized in producing Burgmann series seals.
We have over 20 years production experience, wit...
