High-Efficiency RPW-020 Seal for Fristam Pumps
High-Efficiency RPW-020 Seal for Fristam Pumps
Overview
HydroMax Seal RBW-020 | Component Seal Range for Fristam Pumps
The RBW-020 is a component seal series designed specifically for Fristam pumps, allowing direct installation without any pump modification. These seals feature a single-spring energised rotary face paired with a compatible stationary seat, engineered for dependable sealing in hygienic and industrial processing environments.
All units are factory-tested and ready for installation, delivering performance and reliability in a simple, drop-in configuration.
Product Description
Design Features
- Designed to fit Fristam pump models without modification
- Single spring energised rotary seal faces
- Matched stationary faces included
- Supplied fully assembled and factory tested
Technical Specifications
| Inboard Seal Face Combination | Car/TC, TC/TC |
| Elastomers | Viton, ERP, Aflas |
| Shaft Speeds | Up to 20 m/s |
| Pressures | Up to 16 barg (232 psig) – shaft size specific |
| Temperatures | Up to 230°F |
Warning
Performance specifications are based on each parameter individually. Do not combine the upper limits of speed, pressure, and temperature without confirming suitability with HydroMax engineering support.
Typical Applications & Industry Use Cases
The RPW-020 is a cartridge-style single mechanical seal specially designed for compatibility with Fristam pumps. It uses a single-spring energized rotary seal face mated to a stationary face — delivering leak-free performance in standard fluid-transfer duties that require reliability and pump integrity.
Industries Served
Water supply, water treatment, and wastewater systems
for clear-water or low-contaminant services using Fristam or similar pumps.
General industrial fluid transfer
where clean or moderately clean liquids are pumped, and simple single seals suffice.
Hygienic or sanitary applications
as RPW-020 is compatible with Fristam’s hygienic pumps and designed to fit without pump modification, making it suitable for food, beverage, or pharmaceutical-grade fluid handling (subject to elastomer/material compatibility).
Light to moderate chemical or solvent handling
where pressures, temperatures, and fluid aggressiveness remain within the seal’s rated limits (e.g, up to ~16 barg pressure, up to ~230°F, shaft speeds up to ~20 m/s per spec)
Equipment & Use-Case Scenarios
- Small to medium centrifugal pumps — especially Fristam pumps — running clean water, light chemicals, or hygienic fluids requiring leak-tight sealing without complex barrier or flush systems.
- Systems where gland space is limited, and a compact, factory-fit cartridge seal simplifies maintenance and replacement without requiring pump housing modification.
- Operations with moderate pressures and temperatures where a balanced, single-spring seal provides stable sealing and acceptable performance.
- Situations where maintenance downtime must be minimal — the pre-assembled cartridge seal enables quick, error-free change-out.
Why It Fits These Applications
- As a cartridge-type seal, RPW-020 is factory-assembled and pre-set, reducing installation errors, simplifying maintenance, and minimizing downtime compared with traditional component seals.
- The single-spring, rotary seal-face design offers consistent face loading and stability under typical operating pressures and speeds, ensuring reliable sealing over extended runs.
- Compatibility with Fristam pump models means no pump modification is required — enabling straightforward replacement in existing equipment.
- Its material and elastomer options (seal face combinations such as Carbon/Tungsten Carbide or TC/TC; elastomers such as Viton, Aflas, or similar) provide flexibility for a range of fluid chemistries and moderately demanding services.
Installation Guidelines
Before installation, thoroughly clean and inspect the pump shaft, seal chamber bore (or sleeve), and gland face — ensure they are free of scoring, corrosion, or debris, and are within tolerance. Proper surface condition is essential for face alignment and sealing performance.
Slide the RPW-020 cartridge onto the shaft (or into the gland) carefully, without forcing or misalignment. Because it’s a pre-assembled cartridge, spring loading and face setting are already done — avoid disturbing the setup.
Engage any set-screw or drive-screw (if applicable) per the manufacturer’s instructions to securely fasten the rotary part. Confirm alignment and proper seating before closing the gland and tightening bolts evenly.
If fluid service conditions (pressure, temperature, fluid chemistry) are within the seal’s rated limits — up to ~16 barg and ~230°F — then commission the pump. Record baseline operating parameters (shaft speed, fluid pressure, temperature) to enable future monitoring and preventive maintenance.
Maintenance & Inspection Best Practices
- Regularly inspect for leaks, vibration, temperature rise, or unusual noise — since RPW-020 is a single-seal without an external barrier/fluid support, good operating conditions and clean fluid are important for long seal life.
- During scheduled maintenance, inspect secondary seals (O-rings, gaskets) for wear or deformation, examine seal faces for damage or scoring, and ensure shaft sleeve and gland surfaces remain in good condition. Replace any worn components promptly.
- Maintain a log of operating conditions: fluid type, cleanliness, pressure, temperature, run hours, and start-stop cycles — this helps detect patterns that may lead to premature seal wear or failure.
- Avoid dry running, rapid start-stop cycles under load, or prolonged operation at boundary conditions (maximum pressure, temperature, speed) — all of which increase the risk of seal wear or failure.
- If fluid properties change (more aggressive chemistry, higher temperature, particulate contamination), reassess the seal configuration and materials; a more robust seal design may be needed.
Service & Support Options
- Pre-installation consultation: confirm that RPW-020 is correctly specified for your pump (shaft size, operating conditions, fluid chemistry), and that the elastomer/face material combination meets service requirements.
- Spare-parts kit availability: ensure stock of seal faces, O-rings/gaskets, gland hardware, and sleeves (if applicable) to facilitate quick replacements and reduce downtime.
- Scheduled preventive maintenance: monitor operating logs, inspect seals during shutdowns, replace secondary seals periodically — extending seal life and protecting pump integrity.
- Upgrade or re-specification support: if your process becomes more demanding (higher temperature, pressure, aggressive fluid) — consider moving to a more heavy-duty seal design (balanced, dual seal, flush-supported, etc.) to ensure reliability.
- Long-term maintenance programmes to help you maximise uptime, control cost, and streamline replacement scheduling.
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Contact HydroMax Seal
Contact HydroMax Seal today for innovative solutions, expert guidance, and over a century of engineering excellence. Your journey to mechanical sealing excellence starts with HydroMax Seal!
E-Mail: sales@hydromaxseal.com
Address: 18511 Beaumont Hwy Building D
Houston, TX
77049
