Products Description
6.5HP Engine 2″ Water Seal with Bronze Sleeve 108-25
Mechanical Shaft Seal Assembly for 2-Inch Water Pumps
The 108-25 water seal is a mechanical seal assembly designed to prevent fluid leakage between the rotating pump shaft and the stationary pump housing. It is engineered for 6.5HP gasoline engines driving 2-inch water pumps, commonly used in agriculture, construction dewatering, and general water transfer applications. Featuring a bronze sleeve for enhanced durability and a size designation of 108-25 for 25mm shafts, this seal assembly ensures long-lasting, leak-proof performance.
Technical Profiles & Materials
108-25 Mechanical Seal Design
This seal follows the 108 series mechanical seal standard, which conforms to GB6556-86, DIN24960-80, and ISO3069-74 standards. The 108-25 model is specifically sized for 25mm diameter shafts, with L dimension of 32mm and D1 of 39mm.
Bronze Sleeve Construction
The assembly includes a bronze sleeve that provides a durable, corrosion-resistant surface for the seal faces. Bronze sleeves offer excellent wear resistance and protect the pump shaft from scoring, extending the service life of both the seal and the pump. For 25mm shaft applications, the sleeve typically features a nominal ID of 25mm with a press-fit tolerance.
Seal Face Materials
The mechanical seal features stationary and rotating faces made from wear-resistant materials. Options include ceramic/stationary rings paired with carbon/rotary rings, or silicon carbide/tungsten carbide combinations for abrasive fluid applications.
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Model | 108-25 (108 series mechanical seal) |
| 2 | Shaft Diameter (d1) | 25 mm |
| 3 | Overall Length (L) | 32 mm |
| 4 | Outer Diameter (D) | 40 mm |
| 5 | Housing Bore (D1) | 39 mm |
| 6 | Seal Type | Single spring, unbalanced, internal mounting |
| 7 | Pressure Rating | Up to 1.0 MPa |
| 8 | Speed Rating | Up to 10 m/s |
| 9 | Temperature Range | -30°C to +200°C (depending on elastomer) |
| 10 | Sleeve Material | Bronze (sintered or machined) |
| 11 | Seal Faces | Carbon vs Ceramic / Silicon Carbide / Tungsten Carbide |
| 12 | Secondary Seal | NBR / EPDM / FKM (Viton) |
| 13 | Application | 6.5HP engine-driven 2″ water pumps |
Products Application
Agricultural Irrigation
Ideal for 2-inch water pumps used to draw water from ponds, rivers, and reservoirs for crop irrigation. The 108-25 seal prevents leakage and contamination, ensuring consistent pump performance during extended operation. Common in 6.5HP petrol engine pumps with 2-inch inlets used on farms and rural properties.
Construction and Dewatering
Essential for construction site pumps handling water from excavations and flooded areas. The bronze sleeve provides robust protection against abrasive particles, while the mechanical seal prevents leakage that could compromise dewatering efficiency. Compatible with 6.5HP Honda GX200-powered 2-inch pumps.
Chemical and Industrial Transfer
Suitable for pumps handling mild chemicals and industrial fluids. The 108-25 seal can be specified with FKM elastomer and silicon carbide faces for improved chemical resistance. Found on polypropylene pump bodies paired with 6.5HP engines for chemical transfer applications.
Quality and Craftsmanship Details
Products Package
About Us
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Customer Reviews
FAQ
Q: How do I confirm this seal fits my pump?
A:Check your pump's shaft diameter. The 108-25 seal fits 25mm (approx. 1 inch) diameter shafts. Verify your pump is a 2-inch centrifugal pump driven by a 6.5HP engine, and that the existing seal is a 108 series type.
Q: What is the advantage of the bronze sleeve?
A: The bronze sleeve provides a durable, replaceable wearing surface for the seal faces, protecting the pump shaft from scoring and corrosion. It extends pump life and allows for easier seal replacement during maintenance.
Q: What elastomer material should I choose?
A: NBR is suitable for water and mild chemicals. EPDM offers better resistance to hot water and mild acids. FKM (Viton) provides the best chemical resistance for aggressive fluids. Choose based on your pumped media.
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