Mechanical Seal Spring – RPW-031 Single Coil
Mechanical Seal Spring – RPW-031 Single Coil
Overview
HydroMax Seal RPW-031 | Bi-Directional Single Coil Spring Seal with PTFE ‘V’ Packing
The RPW-031 is a bi-directional single coil spring mechanical seal equipped with PTFE ‘V’ packing for enhanced chemical resistance and shaft adaptability. Designed for internal wet applications, it features a shrink-fitted rotary head, parallel shaft design, and a set screw drive system for secure installation and reliable torque transmission.
This seal is ideal for applications requiring low friction, excellent sealing under variable pressure, and compatibility with aggressive media.
Product Description
Design Features
- Bi-directional single spring configuration
- Shrink-fitted rotary head for secure and stable operation
- Parallel shaft design with chemically resistant PTFE ‘V’ packing
- Set screw driven for precise shaft engagement
- Suitable for internal wet applications across a variety of industries
Technical Specifications
| Seal Shaft Sizes | 1.000″ – 4.000″ (12mm – 100mm) |
| Inboard Seal Face Combination | Car/TC Car/SiC |
| Elastomers | V-Packing (PTFE) |
| Shaft Speeds | Up to 10 m/s |
| Pressures | Up to 8 Barg (116 psig) – Shaft Size Specific |
HydroMax Seal RPW-031 provides robust, chemically resistant sealing performance for rotating equipment where both reliability and bi-directional capability are essential.
Typical Applications & Industry Use Cases
The RPW-031 Single Coil Spring Mechanical Seal is a simple, reliable internal wet seal designed for parallel-shaft rotating equipment. It features a single helical coil spring and elastomeric secondary sealing to provide effective sealing in general industrial applications. The rotary element is secured with a set-screw drive for positive engagement to the shaft. This seal is suitable for a wide range of services requiring a basic, dependable mechanical seal.
Industries Served
Water and wastewater treatment
Chemical and petrochemical processing
Industrial process pumping
Manufacturing and assembly lines
HVAC and utility pumping systems
Agricultural and irrigation services
Equipment & Use-Case Scenarios
- Parallel-shaft centrifugal and process pumps, where simple internal wet sealing is acceptable
- Services with clean to moderately contaminated fluids
- Applications operating under low to moderate pressure and temperature
- Routine maintenance and replacement in general industrial pumping systems
Why It Fits These Applications
- Single coil spring design: Provides consistent radial loading to keep seal faces in contact while compensating for minor shaft motion
- Elastomeric secondary seals: Offer effective sealing against the shaft and housing surfaces
- Set-screw drive: Ensures secure mechanical engagement and simplifies installation
- Internal wet configuration: Suitable where the process fluid provides sufficient lubrication and cooling
- Cost-effective solution: Ideal for standard services that do not require complex seal support systems
Installation Guidelines
Pre-Installation Preparation
Clean and inspect the pump shaft, seal chamber bore, and gland surfaces. Remove corrosion, debris, and surface imperfections to ensure proper sealing surface contact and alignment.
Seal Installation
Slide the RPW-031 seal onto the shaft into the seal chamber. Position the coil spring and elastomer elements correctly relative to the shaft and housing. Tighten the set screws evenly to secure the seal without over-torquing.
Orientation Check
Confirm that the seal’s orientation matches the direction of shaft rotation and fluid flow, where applicable.
System Readiness
Verify that the seal chamber is flooded with process fluid if required and that all components are securely in place before starting the equipment.
Maintenance & Inspection Best Practices
- Routine Visual Checks: Inspect the seal area for signs of leakage, unusual vibration, or temperature changes
- Seal Face Condition: During scheduled downtime, check seal faces for wear, scoring, or deposits
- Secondary Seal Care: Replace elastomer O-rings if they show signs of hardening, cracking, or deformation
- Operating Logs: Track operating conditions such as pressure, temperature, and shaft speed to support predictive maintenance
- Spare Parts Inventory: Keep replacement springs, secondary seals, and seal faces available to minimize service downtime
Service & Support Options
- Application Review:Confirm material compatibility and elastomer choice for your specific fluid chemistry and operating conditions
- Installation Assistance: Guidance to help ensure proper orientation and secure set-screw engagement
- Preventive Maintenance Planning: Establish regular inspection intervals based on duty cycle and operating history
- Seal Upgrade Evaluation: If service conditions change or become more demanding, assess alternate designs or materials for improved performance
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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
