Single Spring Semi-Cartridge Mechanical Seal

 

• Description: 

The SSC696A-B Single Spring Semi-Cartridge Mechanical Seal is a pre-assembled sealing solution engineered for reliable operation in light-duty slurry, non-abrasive, and moderate process services. The semi-cartridge design ensures correct installation settings, minimizing human error and reducing commissioning time. 

 

This seal is available in both balanced and unbalanced configurations, allowing flexibility based on pressure and fluid characteristics. Its single spring design enhances mechanical reliability while maintaining consistent face loading, even in variable operating conditions. 

 

The design is particularly suitable for general industry pumps where ease of maintenance, cost control, and dependable sealing performance are critical. 

 

• Key Features: 

• Cost-effective design with refurbishment capability. 

• Available in metric and inch sizes for global compatibility. 

• Independent of rotation direction – suitable for bi-directional equipment. 

• Easy installation and removal – reduce downtime and maintenance effort. 

• Available in balanced & unbalanced configurations for application flexibility. 

• Single spring design – robust and less prone to clogging in light slurry service. 

• Optional flushing and quenching connections for enhanced seal environment control. 

• Semi-cartridge construction – factory assembled and pre-set for error-free installation. 

 

• Service Overview: 

Parameter	Value
Seal Type	Single Spring Semi-Cartridge
Configuration	Balanced / Unbalanced
Equipment	Process Pumps
Fluid Type	Light slurries, light hydrocarbons, viscous media
Industry Use	Chemical, pharma, sugar, distillery, power, steel
Installation	Pre-assembled, no setting required

 

• Technical Specifications: 

Item	Min	Max	Typical / Notes
Shaft Size	20 mm	100 mm	0.75” to 4.0”
Pressure	—	12 bars	Depends on the balance design
Temperature	-20°C	160°C	Elastomer dependent
Speed	—	2900 RPM	Standard pump applications
Seal Arrangement	Single	—	API Arrangement 1 equivalent
Balance	Optional	—	Based on service severity

 

• Materials of Construction: 

Component	Standard Material	Optional Material	Comment
Seal Faces	Carbon / Ceramic	Silicon Carbide / Tungsten Carbide	Selected based on abrasiveness & heat
Elastomers	NBR / EPDM	FKM, Aflas, PTFE, TTV	Chemical compatibility driven
Hardware	SS 304	SS 316 / Hastelloy B & C	Corrosion resistance selection

 

• Applications: 

• Chemical process pumps 

• Sugar mills and distilleries 

• Pharmaceutical and sterile fluid handling 

• Light hydrocarbon and refinery auxiliary services 

• General industrial pumps in steel and power plants 

• Beverage and food processing (non-abrasive service) 

 

 

• Operating Limits: 

Parameter	Value
Shaft Size	20 – 100 mm (0.750” to 4.000”)
Pressure	Up to 12 bars (174 psi)
Temperature	-20°C to +160°C (-4°F +320°F)
Speed	Up to 2900 RPM

 

• Engineering Note: 

This seal is recommended where: 

• Process fluid is non-hazardous or moderately hazardous 

• Frequent maintenance access is available (single seal limitation) 

• Cost-effective sealing is required without compromising reliability 

• For hazardous, high-pressure, or zero-emission applications, evaluation for dual seal (API Arrangement 2 or 3) is recommended.