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560A Series Rubber Industrial Mechanical Sewage Pump Seals
The 560A series mechanical seal is specifically designed for industrial wastewater treatment, municipal sewage handling, and high-viscosity fluid transfer. As a self-aligning rubber bellows seal, it excels in sewage pumps handling solids, fibrous materials, or mildly abrasive media, thanks to its unique single-spring and bellows construction. As a professional upgrade of the 560 model, the 560A offers enhanced axial displacement compensation, making it an ideal choice for industrial pump maintenance and OEM supply.
Technical Excellence & Material Integrity
Non-Clogging Bellows Design: The rubber bellows eliminates media hang-up and clogging issues common with traditional spring seals, and automatically compensates for axial offset and shaft runout.
Premium Elastomers: High-performance NBR (Nitrile), EPDM, or Viton (FKM) rubber ensures excellent elasticity and aging resistance in acidic, alkaline, oil-based, and fluctuating temperature conditions.
Superior Face Materials: Seal faces can be specified as Silicon Carbide (SiC), Tungsten Carbide (TC), or Graphite Carbon, providing extreme hardness and wear resistance to significantly extend Mean Time Between Failures (MTBF).
Reliability Features
Dynamic Pressure Balancing: Maintains stable operation at working pressures up to 1.0 MPa (10 bar) while reducing frictional heat generation.
Easy Installation: Compact design and standardized dimensional tolerances (compatible with a wide range of shaft diameters) enable quick, error-free field replacement.
Strict Quality Control: Each seal undergoes rigorous pressure integrity testing and seal face flatness inspection, conforming to ISO 3069 and DIN 24960 standards.
Operating Limits
Shaft diameter
8~50mm
Pressure
up to 0.6Mpa
Temperature
-20~150°C
Sliding velocity
10m/s
Material Specifications
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
Key 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
Why Professionals Rely on Our 560A Seals?
Universal Compatibility: Perfectly matches sewage and centrifugal pump models from leading global brands such as Grundfos, Lowara, Flygt, and others.
Reduced Maintenance Costs: Minimizes shaft wear and prevents leakage, significantly lowering long-term operational costs and unplanned downtime.
Expert Support: We provide detailed installation instructions and material selection recommendations to ensure 100% compatibility with your actual fluid media.
Technical FAQ: 560A Series Mechanical Seals for Sewage Pumps
Q1: Why is the 560A bellows seal superior to conventional multi-spring seals for sewage pumps?
A: Sewage often contains fibers, solids, or viscous materials. In conventional multi-spring seals, the springs are prone to clogging or stiction due to debris winding or scale buildup, leading to seal failure. The 560A series uses a single large spring together with a rubber bellows. The large spring is self-cleaning, and the bellows design prevents loss of compensatory flexibility from debris accumulation, dramatically reducing clogging risk.
Q2: How do I select the correct elastomer for the 560A seal based on the service medium?
A: Elastomer choice directly determines seal life: NBR (Nitrile): Suitable for general industrial wastewater, oils, and water supply (temperature up to 100 °C). EPDM: Recommended for hot water, weak acids, or weak alkalis - but not compatible with mineral oils. Viton / FKM: For aggressive chemical media, high temperatures (up to 180 °C), or complex organic solvents.
Q3: How does the 560A seal protect the shaft against wear?
A: One key advantage of the 560A is that the rubber bellows does not slide relative to the shaft. The driving torque is transmitted directly through the rubber onto the shaft - unlike seals that rely on an O-ring sliding axially on the shaft for wear compensation. This design effectively protects the pump shaft or shaft sleeve from wear, saving costly shaft repair or replacement.
Q4: Can the 560A series tolerate dry running?
A: The vast majority of mechanical seals, including the 560A, are not designed for dry running. The instantaneous frictional heat will damage the seal faces (cracking or carbonization). If your sewage pump is at risk of running dry, we recommend specifying SiC vs. SiC faces together with an external flush system or a dry-run protection device.
Q5: How can I verify proper installation of a 560A seal?
A: Pay attention to three key points: Working Length: Ensure the seal compression matches the specification sheet. Over-compression reduces efficiency; under-compression causes leakage. Shaft Surface Roughness: Shaft roughness should be ≤ Ra 0.8 μm to guarantee static sealing of the rubber bellows. Concentricity: Check that shaft radial runout is within 0.05 mm. The 560A's self-aligning feature compensates for minor misalignment, but excessive runout will shorten service life.
Q6: Which international brand models can the 560A series interchange with?
A: The 560A series is dimensionally highly interchangeable and typically serves as a drop-in replacement for similar products from:
EagleBurgmann: EA560 series
John Crane: Type 6 / Type 21 series (partial compatibility)
Flowserve: Equivalent bellows series in corresponding sizes
Standard components in Grundfos and Flygt submersible 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
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...
