The 109 series mechanical seal is also one of the most commonly used single-end face universal standard mechanical seals for pump rotating shafts. The 109 design adds positioning retaining rings or limit step structures on the outer side/backside of the rubber bellows (or secondary sealing components), enabling the sealing components to have a more clear axial positioning and anti-slip movement capability on the shaft.

Product advantages

Product Advantages: Professional Sealing, Long-lasting and Practical
Auxiliary Sealing: Uses Dicron, Fluorocarbon, and Ethylene Propylene Diene Monomer (EPDM) for excellent sealing performance.
Sealing Section:
Made of materials such as graphite, silicon carbide, and tungsten carbide.
Metal Components:
Uses stainless steel 304, which is hard in texture, resistant to rust, and has a long service life.

Good sealing performance
Small standard error in size, small structural cross-section, easy installation, strong sealing capability
Easy installation Choose high-quality materials and craftsmanship. The surface is smooth and has a good texture, without any rough edges or burrs.

Support customization Products can be customized according to customer requirements. The edges are smooth and attention is paid to details. Welcome to inquire and place an order.

Products features

More reliable axial positioning: The sealing component is firmly locked in the predetermined position by the retaining ring/locking spring or the stop step, reducing the reliance on the processing errors of the shaft shoulder and shaft sleeve step - in the actual working conditions of "old pump renovation, inconsistent shaft diameter, inconsistent cavity depth/depth", this feature is extremely valuable.
Secondary sealing (also for transmission) of rubber corrugated pipe: Just like 108, the corrugated pipe provides elastic followability, is more tolerant of scratches on the shaft surface and minor eccentricity; at the same time, it has fewer parts and a compact structure, with fewer failure points.
Standardized interface, quick changeover: The installation dimensions are compatible with the sealing cavities of mainstream water pumps/chemical centrifugal pumps, the spare parts have strong universality, and the downtime is short.

Material combination

Friction pair: Resin immersion/silver-sulfur graphite × Silicon carbide (SiC) / Hard alloy (YG6/YG8) / Alumina ceramic
Auxiliary seals (flexible tube/O-ring/retaining ring): NBR / EPDM / FKM (Viton) / VMQ
Metal parts: SUS304 / SUS316L (springs, retaining rings, fasteners can be upgraded as needed)

Application fields

Water supply and drainage: IS/IH water pumps, pipeline pumps, booster pumps, water supply pumps, circulation pumps, cooling tower pumps
Municipal and environmental protection: sewage treatment lift pumps, return pumps, regulating tank circulation pumps (medium cleanliness medium)
Industrial general pumps: weakly corrosive chemical centrifugal pumps, auxiliary pumps for printing and dyeing/papermaking (provided that the material matching is in place)
Buildings/Fire protection/Heating, Ventilation and Air Conditioning: Building booster, fire stabilization pump matching (materials and sealants need to meet local regulations)