The HEHOM Mechanical Seal, manufactured by Harini Engineering in Tirupur, Tamil Nadu, is a round, polished SS304 stainless steel seal designed for external mounting on shafts, often used in sanitary pumps and light industrial applications.It’s offered as a single-seal assembly suitable for compact gland arrangements with ease of maintenance and corrosion resistance.

• Key applications: Used in small to mid-size sanitary and industrial pumps, mixers, and compressors—especially where clean operation and minimal fluid contamination are critical.

• Advantages:

  • External springs improve serviceability and reduce fouling

  • Stainless steel polish enhances hygiene and corrosion resistance

  • Adaptable sizing fits various shaft diameters and gland spaces

  • Balanced design reduces friction and extends seal life

• Model/Brand Name: HEMTN, by Harini Engineering (Tirupur, India) .

• Sold as a polished, round stainless steel mechanical seal.

• Primarily used in industrial equipment like pumps and mixers—designed for high durability (“unbreakable,” “fine finish”)
  
  
  

  Sealing Characteristics

   

  • Sealing Type: Standard mechanical seal—probably single or unbalanced design, manually mounted.

  • Chemical resistance: Effective for water, oils, mild chemicals, and wastewater; elastomer compatibility dictates media tolerance .

  • Face Coating: No special coatings; standard polished stainless or metal-ceramic faces.

The HET50 mechanical seal, produced by Harini Engineering in Tirupur, Tamil Nadu (India), is a compact, external-mounted, balanced single-face mechanical seal. Machined from polished SS304 stainless steel and available in both silver and black finishes, it’s tailored for industrial pumps and rotating equipment where corrosion resistance and maintenance efficiency are crucial

• Widely used in centrifugal pumps, mixers, compressors, and agitators across industries like water treatment, chemical processing, and general industrial operations.

• Ideal for environments requiring easy servicing, space-efficient design, and moderate durability.

A mechanical pump is an engineered device that moves fluids—liquids or gases—by converting mechanical energy into hydraulic energy. Broadly, pumps are classified into two major categories:

1. Positive Displacement Pumps – trap fixed volumes of fluid and force them through the system.

2. Dynamic (Centrifugal/Axial/Mixed Flow) Pumps – impart velocity to fluid, then convert it into pressure.

The HE160A Mechanical Seal is a robust and versatile sealing solution engineered for precision and reliability in a wide variety of industrial fluid handling systems. Known for its superior construction and dependable performance, the HE160A is ideal for use in pumps, mixers, and rotating equipment across diverse sectors including chemical processing, petrochemical industries, food and beverage, pharmaceuticals, water treatment, and power generation.

This seal is designed with a single balanced, pusher-type configuration, which allows it to operate under varying pressure conditions while maintaining stability and minimal leakage. The balanced design significantly reduces the axial load on the seal faces, improving the seal’s longevity and reducing wear, even in high-pressure systems. Its pusher mechanism ensures consistent sealing even when faced with shaft movements, thermal expansion, or misalignments.

The HE160A typically uses high-grade materials for optimal performance and resistance. The seal faces are made from premium-grade materials such as Tungsten Carbide, Silicon Carbide, or Carbon, which provide excellent thermal and chemical resistance. These materials are highly durable and capable of withstanding abrasive and corrosive media. The secondary sealing elements are manufactured from elastomers like Viton, EPDM, or Nitrile (NBR), selected based on compatibility with the process fluid. The metal components are generally crafted from SS316 or SS304 stainless steel, offering mechanical strength and corrosion resistance.

One of the distinguishing features of the HE160A is its modular and compact design, which facilitates quick installation and easy maintenance without dismantling the equipment entirely. The mechanical seal is engineered to operate efficiently under a temperature range from -20°C to +180°C, making it suitable for both chilled and high-temperature processes. It can withstand pressures up to 20 bar and shaft speeds up to 3600 RPM, depending on the size and material configuration.

Available in shaft sizes ranging typically from 20 mm to 100 mm, the HE160A can be customized to fit specific application needs. The seal also offers excellent chemical compatibility, allowing it to handle aggressive chemicals, slurry, light hydrocarbons, and other industrial fluids. Its design accommodates minor shaft misalignment and vibration, ensuring consistent performance over long operating cycles.

The HE160A complies with DIN 24960 and ISO 3069 standards, ensuring compatibility with a wide range of pump brands and models. It is often used as a replacement or equivalent for well-known international sealing systems such as Burgmann M7N and John Crane Type 21 or 2100, making it a reliable alternative for OEM applications.

Maintenance professionals prefer the HE160A for its reliable sealing, low friction operation, and extended service intervals. Whether used in clean water systems or aggressive process media, this seal minimizes unplanned downtimes and reduces overall lifecycle costs.

A mechanical shaft is a fundamental component used in machines to transmit rotary motion and torque from one part of a mechanical system to another. Whether in pumps, motors, turbines, gearboxes, or automotive systems, the shaft acts as the axis around which rotating elements—such as gears, pulleys, impellers, or flywheels—are mounted. Designed to withstand torsional, bending, and axial loads, shafts are essential to maintaining alignment, mechanical integrity, and efficient power transfer.

The primary role of a mechanical shaft is to:

• Transmit torque from a power source (e.g., motor) to a driven element (e.g., pump impeller).

• Maintain rotational alignment across components.

• Support mounted elements such as gears or pulleys.

• Provide a path for bearing support and sealing systems.

In dynamic conditions, shafts must also handle bending loads (from overhung masses), torsion, and axial loads (especially in helical gear systems or pump impellers).

Key factors affecting performance include:

• Straightness and concentricity (to avoid vibrations)

• Tensile and torsional strength

• Surface finish and hardness (to resist wear at bearing and seal interfaces)

• Fatigue resistance (critical in cyclic loading environments)
  
  
  

  Applications

  Mechanical shafts are found in:

   

  • Industrial pumps and motors

  • Automotive drive trains (e.g., crankshafts, camshafts, propeller shafts)

  • Turbines and generators

  • Conveyors and material handling equipment

  • Gearboxes and reduction drives

A molded diaphragm is a flexible, precision-engineered membrane used in a wide range of mechanical and fluid control systems to isolate two environments or regulate the movement of gases and liquids. Made from elastomeric materials—often reinforced with fabric or metal inserts—molded diaphragms are designed to flex repeatedly under pressure while maintaining an airtight or liquid-tight seal.

Molded diaphragms serve primarily as dynamic seals or barriers. They are key components in:

• Pumps: Like diaphragm metering pumps, air-operated double-diaphragm (AODD) pumps

• Valves: Pressure regulators, diaphragm control valves

• Actuators: Pneumatic and hydraulic control systems

• Compressors: Especially where lubrication-free, low-friction sealing is needed

• Medical and pharmaceutical equipment: Due to their sterile, non-contaminating properties when made from approved materials

In these systems, the diaphragm moves axially, flexing back and forth in response to pressure changes or mechanical actuation, effectively controlling flow without exposing moving parts to the fluid medium.

• Hermetic sealing: Prevents leakage between chambers, ideal for sterile or sensitive environments

• No sliding friction: Eliminates the need for lubrication

• Long service life: When properly designed and reinforced, they withstand millions of flexing cycles

• Chemical compatibility: With a range of elastomers and PTFE layers available

• Customization: Can be designed with specific shapes, inserts, thicknesses, and materials to meet unique system requirements

Silicon carbide (SiC), often referred to as carborundum, is a remarkable engineer's and scientist’s material. Here’s a refined 500‑word overview of solid SiC, covering its structure, properties, manufacturing methods, and wide-ranging applications

• Wear-resistant Components: Seals, bearings, nozzles, rollers

• Abrasives & Cutting Tools: Drills, grinding media

• Thermal & Structural Ceramics: Furnace elements, kiln furniture

• Armor & Protective Systems: Lightweight ballistic protection

• Power Electronics: SiC MOSFETs, diodes, high-voltage inverters for EVs, solar, data centers, HVDC

• Quantum & Photonic Technologies: Color-center quantum devices

A stainless steel polished mechanical shaft is a critical component in a wide range of machinery, designed to transmit torque and rotational motion while withstanding various operational stresses. The combination of stainless steel material and a polished surface finish makes these shafts highly durable, corrosion-resistant, and ideal for precision mechanical systems across industries such as automotive, aerospace, manufacturing, marine, and medical equipment.

Polished stainless steel mechanical shafts are used in:

• Pumps and Motors: Providing long-lasting shaft support under varying pressures.

• Food Processing Equipment: Where hygiene and corrosion resistance are essential.

• Medical Devices: Demanding both strength and a sterile surface.

• Automotive Transmissions: Requiring high fatigue strength and precision.

• Marine Propulsion Systems: Exposure to saltwater necessitates corrosion-resistant materials.

A Viton® bellows mechanical seal is a high-performance sealing component combining a flexible bellows structure (typically metal or PTFE) with Viton (fluoroelastomer) secondary sealing. These seals are widely used in rotating equipment like pumps and agitators, particularly in chemical, petrochemical, and high-temperature environments.

Bellows

• Material: Can be welded metal (e.g., Hastelloy, Inconel, stainless steel), PTFE, or rubber.

• Function: Acts as both spring and secondary seal, compensating for shaft misalignment and thermal expansion.
  
  

  1. Primary Sealing Faces

     • Typically durable materials such as silicon carbide (SiC), carbon, or tungsten carbide.

  2. Secondary Seal (O-ring or elastomer)

     • Made from Viton, chosen for its excellent chemical resistance and broad temperature range.
       
       
       

       Key Advantages

        

       • Corrosion & Chemical Resistance:
         Viton seals resist hydrocarbons, acids, solvents, and aromatic compounds, making them ideal for aggressive fluids.

       • Wide Operating Range:

         • Bellows: Designed for temperatures up to 260 °C (with metal alloys like Hastelloy).

         • Viton: Performs from approximately −20 °C to +200 °C (some grades maintain integrity up to +250 °C).

       • Axial Flexibility:
         Bellows accommodate movement, vibration, and shaft deflection without compromising seal integrity.