HE28 Mechanical Seal

The HE28 Mechanical Seal is a compact, efficient, and highly reliable mechanical seal designed for general industrial applications requiring robust sealing performance. This seal type is commonly used in centrifugal pumps, water systems, light chemical processing units, and rotary equipment that handle non-aggressive and moderately corrosive media. Its simplicity in design, ease of installation, and adaptability make it a preferred choice for OEMs and maintenance teams across various sectors.

The HE28 is a single, unbalanced, pusher-type mechanical seal, ideal for low to medium pressure and moderate temperature applications. Its unbalanced design allows for cost-effective performance in systems where operating pressures do not exceed typical limits. The seal’s pusher-type configuration means it compensates for axial shaft movement during operation, ensuring consistent contact between seal faces for leak prevention.

Seal faces are manufactured from combinations such as Carbon vs Ceramic, Silicon Carbide vs Carbon, or even Tungsten Carbide vs Carbon, depending on the intended use and the nature of the fluid being sealed. These material pairings provide a balance of hardness, chemical compatibility, and thermal resistance. The carbon face is often resin-impregnated to enhance wear life, while the mating face is polished to a fine finish to reduce friction and leakage.

The secondary sealing elements, such as O-rings, are available in Viton®, Nitrile (NBR), EPDM, or PTFE, offering flexibility in application environments. These elastomers are selected based on fluid type, temperature range, and desired durability. For example, Viton is widely chosen for its chemical resistance and performance under elevated temperatures.

All metallic components in the HE28 seal are typically made of stainless steel SS304 or SS316, depending on the chemical environment and client specifications. These materials ensure mechanical strength and corrosion resistance, particularly in wet or mildly corrosive conditions.

The HE28 is engineered to operate at pressures up to 10 bar, and shaft speeds up to 3000 RPM, with a working temperature range of -20°C to +120°C. This makes it well-suited for water pumps, HVAC systems, agricultural pumps, light oil systems, and utility pumps in industries such as food processing, textile, pulp and paper, and general manufacturing.

In terms of design, the HE28 is compact and designed for ease of assembly and disassembly. It fits within DIN and ISO dimensional standards, making it easy to replace in existing systems or integrate into new equipment. Its simple spring mechanism applies consistent pressure to maintain face contact while allowing for thermal expansion and minor shaft deflections.

Overall, the HE28 Mechanical Seal offers a durable, cost-effective sealing solution with versatile material options and excellent operational stability. Its practical performance across a range of low- to medium-duty applications ensures process efficiency, reduces leakage and downtime, and extends pump service life. With proper material selection and installation, the HE28 proves to be a reliable sealing partner in diverse industrial environments.