RPW-040 – Precision Engineered Single Coil Spring
RPW-040 – Precision Engineered Single Coil Spring
Overview
HydroMax Seal RPW-040 | Single Coil Spring Seal for Alfa Laval Pumps
The RPW-040 is a single-coil spring mechanical seal designed for Alfa Laval pump applications. Featuring an internal wet configuration, this seal includes a monolithic rotary head, unbalanced O-ring sealing, and a threaded, shrink-fitted stationary face for secure installation and reliable operation in hygienic and light industrial processes.
Ideal for moderate-speed and pressure applications, the RPW-040 delivers consistent sealing performance in clean environments.
Product Description
Design Features
- Compatible with Alfa Laval pumps
- Internal wet seal with monolithic rotary head
- Unbalanced O-ring design for general-duty fluid sealing
- Single coil spring for simplicity and durability
- Shrink-fitted, threaded stationary face for secure assembly
- Suitable for sanitary and light processing systems
Technical Specifications
| Seal Shaft Size | 22mm |
| Inboard Seal Face Combination | Car/TC |
| Elastomers | Viton ERP |
| Shaft Speeds | Up to 10 m/s |
| Pressures | Up to 5 Barg (72 psig) – Shaft Size Specific |
HydroMax Seal delivers reliable and easy-to-install mechanical seals tailored for OEM pump models and hygienic industry requirements.
Typical Applications & Industry Use Cases
The RPW-040 Single Coil Spring Mechanical Seal is a basic internal wet seal designed for parallel-shaft rotating equipment. It features a single helical coil spring and elastomeric secondary seals to provide effective sealing in general industrial fluid services. Its simple construction and set-screw drive provide reliable mechanical engagement, making it suitable for applications requiring straightforward, dependable sealing without complex support systems.
Industries Served
Water and wastewater treatment
Chemical and petrochemical processing
Industrial process pumping
HVAC and building services
Agricultural and irrigation systems
General manufacturing and fluid transfer
Equipment & Use-Case Scenarios
- Parallel-shaft centrifugal and process pumps requiring simple internal sealing
- Services with clean to moderately contaminated fluids
- Applications operating under low to moderate pressure and temperature conditions
- Routine maintenance and replacement in standard pumping systems
Why It Fits These Applications
- Single coil spring design: Maintains consistent radial force to keep seal faces in contact
- Elastomeric secondary seals: Provide dependable sealing to the shaft and housing surfaces
- Set-screw drive: Ensures secure mechanical engagement and simplifies installation
- Internal wet configuration: Utilises process fluid for lubrication and cooling
- Straightforward, robust construction: Ideal for cost-effective general industrial services
Installation Guidelines
Pre-Installation Preparation
Clean and inspect the pump shaft, seal chamber bore, and gland surfaces. Remove corrosion, debris, and surface irregularities to ensure proper sealing surface contact and alignment.
Seal Installation
Slide the RPW-040 seal onto the shaft into the seal chamber. Ensure the coil spring and elastomer components are correctly positioned relative to the shaft and housing. Tighten the set screws evenly without over-torquing.
Orientation Check
Confirm that the seal’s orientation matches the intended direction of shaft rotation and fluid flow, where applicable.
System Readiness
Verify that the seal chamber is flooded with process fluid if required by your application and that all components are securely in place before starting the pump.
Maintenance & Inspection Best Practices
- Routine Visual Checks: Periodically inspect the seal area for leakage, unusual vibration, or abnormal temperatures
- Seal Face Condition: During scheduled maintenance, examine the seal faces for wear, scoring, or deposits
- Secondary Seal Care: Check elastomeric O-rings for hardening, cracking, or deformation; replace as needed
- Operating Logs: Track fluid pressure, temperature, and shaft speed to support predictive maintenance
- Spare Parts Inventory: Keep replacement springs, secondary seals, and seal faces on hand to minimise downtime
Service & Support Options
- Application Review: Verify elastomer compatibility and overall seal selection based on fluid chemistry and operating conditions
- Installation Assistance: Technical guidance can help ensure correct orientation and secure engagement
- Preventive Maintenance Scheduling: Establish inspection and replacement intervals based on duty and operating history
- Seal Upgrade Evaluation: If service conditions become more demanding, consider alternate designs or materials for improved performance
Related Products
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
