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108U Series Mechanical Seal - China Suppliers & Factory for 35mm to 70mm Alloy Chemical Pumps
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108U Series Mechanical Seal - China Suppliers & Factory for 35mm to 70mm Alloy Chemical Pumps

The 108U Series Mechanical Seal is a versatile solution crafted by leading China suppliers, complying with international standards. This mechanical seal boasts an internal mounting, single-face, single-spring, and unbalanced design, accommodating shaft diameters from 35mm to 70mm. It operates effectively at pressures ≤0.8MPa and temperatures ranging from -20°C to 120°C, ensuring reliable sealing for a variety of media, including water, oil, acids, alkalis, and organic solvents. With its simple structure and robust performance, the 108U Series is an ideal choice for industries seeking dependable mechanical seals from a trusted factory in China
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    Product Details

    Product Introduction

    The 108U mechanical seal is a typical single-spring unbalanced mechanical seal designed for highly corrosive pumps. This seal structure complies and is widely applicable across various pump types, particularly for demanding highly corrosive conditions in industries such as petrochemicals, refining, and chemical processing. Its single-face, single-spring design ensures a compact structure that is straightforward to install and maintain.

    Performance parameters for the 108U mechanical seal include: operating pressure not exceeding 0.8MPa, operating temperature range from -20°C to 120°C, rotational speed not exceeding 3000r/min, and applicable shaft diameter range from 35mm to 70mm. These specifications enable the 108U to adapt to diverse operational environments and pump requirements.

    Max Pressure ≤ 0.8 MPa
    Temperature Range -20°C to 120°C
    Max Speed ≤ 3000 r/min
    Shaft Diameter 35 mm – 70 mm

    Furthermore, the 108U mechanical seal features: a single-spring configuration where the spring transmits torque, with spring rotation direction dependent on the pump shaft rotation; excellent wear and corrosion resistance for harsh environments; simple construction, low cost, broad applicability, and reliable, stable performance.

    Owing to its outstanding wear and corrosion resistance, the 108U mechanical seal finds extensive application across industries including petrochemicals, oil refining, chemical processing, synthetic fibres, water treatment, and chemical transfer.

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    Features
    1 The 108U mechanical seal employs a single-spring configuration, with torque transmitted via the spring whose rotation direction correlates with the pump shaft rotation. It exhibits excellent wear and corrosion resistance, rendering it suitable for demanding operating conditions. Its straightforward construction, cost-effectiveness, and widespread adoption ensure reliable and stable performance.
    2 The seal's core components, particularly the friction pair faces, undergo precision machining and lapping to guarantee superior sealing performance. The product complies with multiple international and national standards, including ISO 3069, GB 6556, and DIN 24960, guaranteeing dimensional accuracy, universality, and interchangeability throughout the manufacturing process.
    3 This series of seals typically employs spring-transmitted torque (via a hook spring drive), a structure renowned for its reliable transmission. It is important to note that this design fixes the seal's rotational direction; therefore, the pump shaft's rotation must be carefully considered during installation.
    4 The single-spring (large spring) design offers superior resistance to clogging compared to multi-spring configurations, making it more suitable for media containing fine particles. Additionally, the single-face design results in a relatively simple structure, contributing to cost reduction and ease of maintenance.
    Frequently Asked Questions
    Q What is the maximum operating pressure for the 108U mechanical seal?
    The 108U mechanical seal is rated for a maximum operating pressure of 0.8 MPa, making it suitable for a wide range of industrial pump applications under moderate pressure conditions.
    Q What industries is the 108U mechanical seal designed for?
    The 108U is widely used in petrochemicals, oil refining, chemical processing, synthetic fibre manufacturing, water treatment, and chemical transfer operations — particularly wherever corrosive media are present.
    Q Does the 108U mechanical seal support both clockwise and counter-clockwise shaft rotation?
    No. Because the 108U uses a hook spring drive to transmit torque, the rotational direction is fixed by the spring wind direction. You must confirm the pump shaft's rotation direction before installation and select the corresponding seal specification accordingly.
    Q What international standards does the 108U mechanical seal comply with?
    The 108U mechanical seal complies with ISO 3069, GB 6556, and DIN 24960. These standards ensure dimensional accuracy, broad interchangeability, and compatibility with pumps from multiple manufacturers worldwide.
    Q Is the 108U mechanical seal suitable for media containing fine particles?
    Yes. The single large-spring design provides better anti-clogging performance compared to multi-spring designs, making the 108U a more reliable choice when the pumped medium contains fine particulate matter.
    Q What shaft diameter range is compatible with the 108U mechanical seal?
    The 108U mechanical seal supports shaft diameters ranging from 35 mm to 70 mm, allowing it to be fitted to a broad variety of pump models and sizes used across different industrial sectors.