Pump & Valve Seals

Single Cartridge Mechanical Seal

Single cartridge mechanical seals for centrifugal and process pumps. Balanced designs, SiC and carbon seal faces, stainless steel construction and custom sizes.

Custom sizes, materials and profiles available
Reliable sealing performance under demanding conditions
Export-ready packing and documents

1. General Specifications

Parameter	Specification
Product Name	Single Cartridge Mechanical Seal
Product Type	Single Cartridge Pump Seal
Seal Arrangement	Single Mechanical Seal
Construction	Pre-Assembled Cartridge Unit
Seal Balance	Balanced Options
Seal Face Materials	Carbon Graphite / Silicon Carbide / Tungsten Carbide
Secondary Seal Materials	NBR / EPDM / FKM / PTFE Options
Metal Components	Stainless Steel 316 / Alternative Alloys
Reference Temperature Range	-20°C to +180°C (Selected Designs)
Reference Operating Pressure	Up to 25 bar (Selected Designs)
Reference Sliding Velocity	Up to 20 m/s (Selected Designs)
Shaft Sizes	Standard Metric / Inch / Custom Sizes
Shaft Sleeve	Integrated
Installation	Cartridge / Gland-Mounted
Applications	Centrifugal Pumps / Process Pumps / Industrial Machinery
Customization	Dimensions / Materials / Gland Design
MOQ	Flexible

2. Seal Face Material Options

Face Combination	Main Characteristics	Typical Applications
Carbon / Silicon Carbide	Good sliding performance and wear resistance in suitable lubricated media	Water Pumps / General Process Pumps
Silicon Carbide / Silicon Carbide	High hardness, wear resistance and chemical compatibility	Chemical Processing / Selected Contaminated Fluids
Carbon / Tungsten Carbide	Good mechanical strength and established sealing performance	Industrial Pumps / Process Equipment
Tungsten Carbide / Tungsten Carbide	High mechanical strength and abrasion resistance	Selected Heavy-Duty Pump Applications

3. Cartridge Design Options

Design Option	Main Characteristics	Typical Applications
Balanced Single Cartridge	Reduced hydraulic face loading for suitable pressure conditions	Industrial Process Pumps
Rotary Seal Arrangement	Flexible sealing element rotates with the shaft	General Industrial Pumps
Stationary Seal Arrangement	Flexible sealing element remains stationary	Selected High-Speed / Process Applications
Flush-Port Cartridge	Connection for controlled flushing or seal face cooling	Process Pumps / Industrial Circulation Systems

Single Cartridge Mechanical Seals are pre-assembled sealing units designed to prevent process fluid leakage along rotating pump shafts. Each cartridge typically incorporates a single set of mechanical seal faces, a shaft sleeve, gland plate, secondary seals and associated hardware into a ready-to-install assembly.

Compared with conventional component mechanical seals, cartridge designs simplify installation by reducing the need for on-site seal setting and adjustment. This helps minimize assembly errors and supports more consistent sealing performance during equipment maintenance and replacement.

Features & Advantages

Pre-Assembled Construction: Seal components are assembled into a complete cartridge unit for easier installation.
Single Seal Face Arrangement: Uses one primary sealing interface to control leakage between the rotating shaft and stationary housing.
Balanced Design Options: Hydraulically balanced configurations help reduce seal face loading in suitable pressure conditions.
Multiple Face Materials: Carbon graphite, silicon carbide and tungsten carbide combinations are available for different operating media.
Integrated Shaft Sleeve: Helps protect the equipment shaft and simplifies seal replacement.
Flush Connection Options: Selected designs include flushing or quench connections for seal face lubrication and temperature control.
Standard & Custom Supply: Available in different shaft sizes, materials and gland configurations.

Materials & Construction

Single cartridge mechanical seals commonly use carbon graphite, silicon carbide (SiC) or tungsten carbide (TC) as sealing face materials.

Secondary seals may be manufactured from NBR, EPDM, FKM or other elastomers according to fluid compatibility and operating temperature.

Metal components are commonly produced from stainless steel, including SS316 or equivalent grades. Alternative corrosion-resistant materials may be selected for demanding chemical applications.

Typical Applications

Centrifugal pumps and industrial process pumps
Water supply and wastewater treatment
Chemical processing equipment
Industrial cooling and circulation systems
Pulp and paper machinery
General industrial pumping equipment

Standard & Custom Supply

CORA SEALS supplies single cartridge mechanical seals for industrial distributors, pump maintenance companies, equipment manufacturers and replacement applications.

Different shaft diameters, gland configurations, sealing face combinations and elastomer materials can be sourced according to technical drawings, equipment details or existing samples.

For quotations, please provide the shaft diameter, pump model, seal chamber dimensions, working pressure, operating temperature, rotational speed and fluid type. Existing seal part numbers or drawings are also helpful for confirming replacement compatibility.

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