High-Efficiency RPW-125 HydroMax Seal for Rotating Equipment
High-Efficiency RPW-125 HydroMax Seal for Rotating Equipment
Overview
Hydraulically Balanced Single Cartridge Rotary Pusher Seal
The RPW-125 from HydroMax Seal is a multi-spring, hydraulically balanced single-cartridge mechanical seal designed for versatile use in industrial rotating equipment. Featuring integrated flush, quench, and drain ports, this seal is engineered for robust performance in applications involving moderate speeds, temperatures, and pressures.
The Rotary Pusher Wet (RPW) seal is equipped with shrink-fitted seal faces, O-ring secondary seals, and is optimized for parallel shaft rotating equipment. Factory-assembled and pressure-tested, the RPW-125 ensures ease of installation and operational reliability.
Product Description
Key Design Features
- Hydraulically balanced pusher seal design for reduced face loading and wear
- Multi-spring configuration promotes even load distribution
- Set screw drive for secure attachment to rotating shafts
- Environmental connections: Flush, quench, and drain ports ensure optimal performance under varied operating conditions
- External restriction bush improves outboard sealing and protects secondary elements
- Shrink-fitted seal faces enhance mechanical strength and temperature handling
- Compact single-cartridge design ensures simple installation and maintenance
Technical Specifications
| Seal Shaft Sizes | 20 mm to 100 mm (1.000″ to 4.000″) |
| Inboard Seal Face Combinations | Carbon / TC Carbon / SiC TC / TC TC / SiC SiC / SiC |
| Gasket Materials | GFT AF1 |
| Elastomer Options | Viton ERP Aflas Kalrez |
| Maximum Shaft Speed | Up to 20 m/s |
| Maximum Pressure Rating | Up to 290.1 psig (shaft size specific) |
| Operating Temperature | Up to 230°F |
Note: The seal’s performance limits (speed, pressure, temperature) are provided as isolated maximums. Do not use the upper limit of multiple variables simultaneously without consulting a HydroMax engineer.
The RPW-125 is part of HydroMax Seal’s reliable and easy-to-install pusher seal line, built for dependable sealing in general industrial and process applications.
Typical Applications & Industry Use Cases
The RPW-125 is a hydraulically balanced single-cartridge rotary pusher seal engineered for robust performance in general industrial rotating equipment. With its multi-spring configuration, flush/quench/drain ports, and compact design, it delivers reliable sealing under moderate pressures, speeds, and temperatures.
Industries Served
General process manufacturing
Pumps, gearboxes, and auxiliary systems requiring a compact single seal.
Chemical and petrochemical plants
Light to moderate duty applications where space is constrained and flushing or quenching is needed.
Water and wastewater
Booster pumps and service equipment for flush or atmospheric drainage.
OEM equipment
Rotating machinery where ease of installation and maintenance matter.
Equipment & Use-Case Scenarios
- Single-shaft rotating equipment where a cartridge-style seal with simplified installation is preferred.
- Pumps operating with flush or quench connections to remove heat or contamination from the seal chamber.
- Retrofit installations where a compact single cartridge seal replaces multiple components, reducing maintenance downtime.
- Machines with shaft diameters in the 20 mm to 100 mm (≈1″ to 4″) range, moderate pressures (up to ~290 psig), and moderate speeds (up to ~20 m/s).
Why It Fits These Applications
- The hydraulically balanced pusher seal design lowers face loading, improving wear life and stability in variable conditions.
- Multi-spring assembly provides even compression across the sealing faces, enhancing durability and reliability.
- Integrated flush, quench, and drain ports allow the seal to adapt to various support-system configurations — including Plan 11/21/31 flush loops or simple open drain systems.
- Compact cartridge format simplifies installation and replacement, reducing maintenance effort and downtime in industrial plant environments.
Installation Guidelines
Ensure the shaft and seal chamber bore are clean, straight, and within tolerance before inserting the cartridge. Remove any scoring, corrosion, or debris to guarantee face alignment.
Carefully slide the cartridge onto the shaft (or into the gland) without forcing the spring assembly. Securely engage the set-screw drive to the shaft as specified.
Connect the flush, quench, and drain ports according to your system’s support plan. Ensure ports are correctly oriented and verify that piping is leak-free and well-supported.
Before startup, confirm that the seal chamber pressure, temperature, and fluid conditions fall within the RPW-125’s rated limits. For example: maximum shaft speed ~20 m/s, pressure up to ~290 psig, moderate operating temperature.
Record an initial baseline of seal-face temperature, flush flow, shaft speed, and chamber pressure for future comparison.
Maintenance & Inspection Best Practices
- Monitor flush/quench flow and drain performance: reduced flow or rising face temperature may indicate blockages or face wear.
- During scheduled shutdowns, inspect the cartridge if feasible: remove the assembly and check the seal faces for wear, the springs for fatigue, and the secondary seals (O-rings) for damage.
- Keep a log of operating parameters, including shaft speed changes, fluid condition (cleanliness/contamination), flush system performance, and any abnormal events (start-stop cycles, vibration spikes).
- Replace secondary seals (O-rings, gaskets) during planned maintenance rather than waiting for failure. Maintain cleanliness in the flush loop to maximise service life.
- If the application’s conditions change (higher speed, higher pressure, more severe fluid contamination), review whether the RPW-125 remains the best fit or if an upgrade is necessary.
Service & Support Options
- Pre-installation consultation is available to confirm the proper specification of the cartridge (face materials: Carbon/TC, Carbon/SiC, TC/TC, etc.), elastomer options (Viton, Aflas, Kalrez), and flush/quench plan compatibility.
- Field or remote commissioning assistance can ensure the flush/quench system is set up correctly and that the seal operates under real-system conditions with temperature and pressure monitoring.
- Spare-parts kits are offered covering seal faces, O-rings, gaskets, springs, and set screws — facilitating maintenance turnaround and minimising downtime.
- Upgrade paths exist: if your service intensifies (for example,e higher speed, higher pressure, or more aggressive media), you can migrate to an enhanced seal model or specification.
- Preventive-maintenance programmes are available to track seal performance, document trends, and optimise life-cycle cost by reducing unplanned seal replacement.
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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
