Durable Single Coil Spring – RPW-022
Durable Single Coil Spring – RPW-022
Overview
HydroMax Seal RPW-022 | Uni-Directional Single Coil Spring Seal with O-Ring
The RPW-022 is a unidirectional single-coil spring mechanical seal designed for internal wet applications. It features a shrink-fitted rotary head and is suitable for parallel shafts with O-ring elastomer sealing. This seal is set screw driven and offered in standard working lengths, ensuring easy installation and consistent torque transfer.
Engineered for reliability in clean or lightly contaminated fluids, the RPW-022 is ideal for moderate pressure and speed applications.
Product Description
Design Features
- Uni-directional single spring design
- Shrink-fitted rotary head for secure sealing
- Parallel shaft compatibility with O-ring sealing
- Set screw drive for positive shaft engagement
- Designed for internal wet sealing applications
Technical Specifications
| Seal Shaft Sizes | 1.000″ – 4.000″ (12mm – 100mm) |
| Inboard Seal Face Combinations | Car/TC Car/SiC |
| Elastomers | Viton ERP |
| Shaft Speeds | Up to 10 m/s |
| Pressures | Up to 8 Barg (116 psig) – Shaft Size Specific |
HydroMax Seal RPW-022 provides dependable unidirectional sealing performance for rotating equipment operating under moderate conditions.
Typical Applications & Industry Use Cases
The RPW-022 Single Coil Spring Mechanical Seal is a unidirectional, internal wet seal designed for parallel-shaft rotating equipment. Featuring a single helical coil spring and an O-ring secondary seal, it is suitable for general sealing duties requiring a simple, reliable mechanical seal. The rotary head is shrink-fitted for secure assembly, and set screws drive the seal to provide consistent torque transfer and stable performance.
Industries Served
Chemical and petrochemical processing
Water and wastewater treatment
General industrial pumping systems
Oil and gas fluid transfer operations
Utilities and power generation facilities
Manufacturing and processing industries require dependable shaft sealing
Equipment & Use-Case Scenarios
- Parallel-shaft centrifugal and process pumps require a simple, unidirectional mechanical seal
- Internal wet applications where process fluid provides adequate lubrication and cooling
- Equipment handling particulate or mildly abrasive fluids where a basic spring-loaded seal is appropriate
- OEM equipment and replacement applications using component-style mechanical seals
Why It Fits These Applications
- Single coil spring design maintains consistent seal-face loading while accommodating shaft movement
- O-ring secondary sealing provides reliable elastomeric sealing against the shaft and housing
- Shrink-fitted rotary head ensures secure assembly and minimizes component slippage during operation
- Set-screw drive delivers dependable torque transmission and straightforward installation
- Standard working lengths allow compatibility with common component seal dimensions
Installation Guidelines
Pre-Installation Preparation
Clean and thoroughly inspect the pump shaft, seal chamber bore, and gland face. Remove corrosion, debris, and surface defects to ensure proper alignment and sealing performance.
Seal Installation
Carefully slide the RPW-022 seal onto the shaft and into the seal chamber. Position the single coil spring and O-ring components correctly, then tighten the set screws evenly to secure the drive without over-tightening.
Orientation Check
Confirm that the seal’s unidirectional design matches the direction of shaft rotation and process flow requirements.
System Readiness
Ensure the seal chamber is properly flooded with fluid if required and that all components are seated securely before startup.
Maintenance & Inspection Best Practices
- Perform routine visual checks for leakage, vibration, or abnormal temperature near the seal area
- Inspect seal faces during scheduled maintenance for wear, scoring, or buildup
- Replace O-rings if signs of hardening, cracking, or deformation are observed
- Maintain operating logs documenting pressure, temperature, shaft speed, and fluid characteristics
- Keep spare springs, seal faces, and secondary seals available to reduce maintenance downtime
Service & Support Options
- Application reviews to confirm material and elastomer compatibility with process fluids
- Installation guidance to support correct positioning and initial operation
- Preventive maintenance planning based on duty cycles and service conditions
- Evaluation of upgraded seal designs if operating conditions become more severe
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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
