SPS-625 – External Mount Heavy-Duty Slurry Seal
SPS-625 – External Mount Heavy-Duty Slurry Seal
The SPS-625 by HydroMax Seal is a double cartridge mechanical seal equipped with an integral, bi-directional barrier fluid pumping ring and inboard wetted parts made from wear-resistant materials. This seal is purpose-built for heavy-duty slurry applications where the process fluid contains abrasive particles, making it ideal for the Mining & Mineral, Pulp & Paper, and Water & Wastewater industries.
The innovative stationary seal design is delivered as a complete cartridge mechanical seal system and supports Plan 53, 53A, 53B, and 53C piping arrangements.
For equipment with small cross-section seal chambers, the SPS-625 can be mounted fully externally (where space permits). Its gland insert with built-in vortex breakers creates a large fluid volume over the inboard faces, optimizing seal performance and longevity.
Product Description
Design Features
- Wear-Resistant Components: Sleeve end cap and gland insert can be manufactured from a range of wear-resistant materials tailored for slurry duty.
- Fully Outboard Mounted: Ideal for equipment with limited seal chamber space, ensuring improved reliability in challenging slurry applications.
- Large Port Orifices: 1/2″ NPT Barrier Fluid In (BI) and Barrier Fluid Out (BO) connections support Plan 53 or 52 configurations.
- Directed Barrier Flow: Internal deflector in the gland guides fluid to inboard faces. Outboard outlet placement enables efficient heat removal on both seal faces.
- Vortex Breaker Design: Gland insert features integral vortex breakers to manage solids in slurry or particle-laden process media.
- API682-Compliant Clearances: Ensures proper radial spacing between rotating and stationary elements.
- Monolithic Seal Faces: Enhanced high-temperature performance.
- Self-Aligning Stationary Face: Ensures stability and performance at high shaft speeds.
- Multi-Spring Construction: Springs are isolated from the process fluid to prevent fouling and wear.
- Efficient Pumping Ring: Bi-directional pumping for reliable barrier fluid circulation.
- Plan 53 System Compatibility: Designed for seamless use with HydroMax Seal Plan 53, 53A, 53B, and 53C systems.
Technical Specifications
- Seal Shaft Sizes: All standard sizes supported
- System Vessel Sizes: 12L and 28L
- Inboard Seal Face Combinations:
- TC/TC
- Car / TC
- Ant. Car / RB SiC
- Ant. Car / TC
- RB SiC / RB SiC
- Outboard Seal Face Combinations:
- Car / TC
- Car / RB SiC
- Ant. Car / RB SiC
- Ant. Car / TC
- TC / TC
- Gasket Materials: Spiral Wound Stainless Steel, Graphite
- Secondary Sealing Materials: Viton, Alfas, ERP, Kalrez
- Maximum Shaft Speed: Up to 4,000 rpm
- Pressure Rating: Up to 25 Barg
- Instrumentation: Designed to work with Plan 53 piping systems
- Temperature Rating: Up to 250°C
Built for Extreme Slurry Conditions
The HydroMax SPS-625 is an advanced stationary seal engineered for demanding slurry environments with compact stuffing box designs. It integrates best-practice design standards and proven performance enhancements—detailed further in our technical blogs and white papers.
