108U Series Mechanical Seal 108U-20/25/30/35/40/45/50/55/60/65/70 Alloy Chemical Pump

The 108U Series Mechanical Seal is a universal product conforming to international standards. Featuring an internal mounting, single-face, single-spring, unbalanced design, it accommodates shaft diameters ranging from 35mm to 70mm. Operating at pressures ≤0.8MPa and temperatures between -20°C and 120°C, it provides effective sealing for diverse media including water, oil, acids, alkalis, and organic solvents. Its structure is straightforward, and its performance is dependable.

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.

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.

Features

1. The 1.108U 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.