RPW-130 Rotary Joint – Durable Seal for Rotating Equipment
RPW-130 Rotary Joint – Durable Seal for Rotating Equipment
Overview
HydroMax Seal RPW-130 | Multi-Spring Balanced Rotary Joint Single Cartridge Seal
The RPW-130 is a multi-spring-balanced rotary joint seal designed as a single-cartridge unit for reliable performance in rotary union and joint applications. Featuring shrink-fitted faces, O-ring secondary sealing, and an integral sealed-for-life bearing, this Rotary Wet Pusher seal delivers long service life with minimal maintenance.
Ideal for medium-speed and medium-pressure systems, the RPW-130 is factory-assembled and tested, ensuring seamless plug-and-play integration into your rotating equipment.
Product Description
Design Features
- Balanced rotary pusher seal for rotary joint use
- Shrink-fit faces with O-ring secondary sealing
- Integrated sealed-for-life bearing
- Multi-spring design for consistent face loading
- Supplied factory assembled and tested
Technical Specifications
| Seal Shaft Sizes | 20mm – 150mm (1.000″–6.000″) |
| Gasket | GFT |
| Elastomers | Viton, ERP, Aflas, Kalrez |
| Shaft Speeds | Up to 10 m/s |
| Pressures | Up to 16 barg (232 psig) — shaft size specific |
| Temperatures | Up to 110°C (230°F) |
Supply Options
- Double mechanical seal configuration for hazardous or sensitive media
- ASME flange welded connections are available for specific piping setups
Warning
The seal performance values listed are typical for each variable. Do not combine upper limit values for speed, pressure, and temperature without consulting HydroMax Seal engineering support.
Typical Applications & Industry Use Cases
The RPW-130 is a multi-spring, balanced rotary-joint single-cartridge seal designed to allow fluid or media transfer between a stationary supply line and a rotating vessel or shaft — effectively functioning as a rotary joint or rotary union.
It is suitable for services involving steam, thermal oil, coolant, water, hydraulic oil, or other fluids/media being supplied to rotating drums, dryers, rolls, reactors, or any rotating equipment requiring a sealed feed-through.
Industries Served
Chemical, petrochemical, and process industries
for reactors, mixers, agitators, or drums requiring rotary feed of cooling/heating fluids or process fluids.
Food, beverage, pharmaceutical, and sanitary processing
where rotating mixers or processing drums may need a fluid supply while maintaining seal integrity.
Paper & textile manufacturing
drying drums, calender rolls or cylinders that need steam, thermal oil or coolant through a rotating joint.
Utility, power, and general industry
rotating machines, heat-exchangers, or thermal-oil circulators that require sealed fluid transfer across a rotating interface.
Equipment & Use-Case Scenarios
- Rotating equipment (drums, cylinders, reactors, mixers) where a fixed supply line must feed fluid/liquid/gas into a rotating shaft/body without leakage — essential for steam, heating oil, coolan,t or hydraulic fluid supply.
- Machines operating under moderate pressure (up to ~16 bar) and moderate temperature (up to ~230°F), with shaft sizes from 20 mm to 150 mm (1.0″ to 6.0″), matching RPW-130 specification range.
- Applications requiring a factory-assembled, ready-to-install rotary joint seal for easier maintenance, quick replacement, and reduced downtime — especially useful in plants where shutdowns are expensive or disruptive.
Why It Fits These Applications
- As a rotary joint/union, RPW-130 provides a sealed interface between stationary supply piping and rotating machinery — enabling continuous fluid transfer without leaks while the shaft or drum rotates. This is the fundamental function of rotary joints.
- The multi-spring, balanced mechanical-seal design reduces hydraulic loading on the sealing faces, helps maintain pressure stability, limits seal wear, and enhances reliability during rotation.
- Cartridge-style, pre-assembled construction simplifies installation and reduces the risk of misalignment, incorrect face loading, or installation errors — improving safety and reducing maintenance effort.
Installation Guidelines
Ensure the shaft or rotating vessel interface and the stationary supply connection are clean, true, and free of scoring or damage before mounting the RPW-130. Proper alignment is critical for seal life and effective sealing.
Insert and mount the cartridge rotary joint carefully per manufacturer instructions; verify that the sealed bearing (if integral) is properly supported and that the sealing faces are aligned correctly before lock-up.
Connect the supply line to the stationary port and verify that any rotating outlet/passage is free to rotate and correctly aligned. Ensure any required instrumentation, pressure relief, or venting is in place.
After installation, run the system under controlled, gradually increasing conditions — monitor for leaks, fluid flow consistency, temperature, pressure stability, and rotational smoothness before full load service.
Maintenance & Inspection Best Practices
- Monitor the rotary joint regularly for leaks, bearing smoothness, fluid supply stability (pressure, flow, temperature), and seal condition — early detection of degradation avoids failure and unplanned shutdowns.
- During scheduled shutdowns, if feasible, inspect the seal faces, O-ring or secondary seals, bearing condition, and housing for wear or damage. Replace worn parts proactively rather than waiting for failure.
- Keep a log of operational parameters: fluid type and condition, pressure, temperature, rotation speed, operating hours, start/stop cycles. This helps in predictive maintenance and lifecycle planning.
- For systems with aggressive fluids, high temperature, or high duty cycles, consider periodic renewal of seal faces, secondary seals, and bearings (if applicable) to maintain reliable sealing over long service life.
- Ensure fluid cleanliness, proper chemistry, and filtration (if the fluid carries particulates) — contaminated fluid can accelerate seal wear or cause early failure.
Service & Support Options
- Pre-installation consultation: to confirm the correct configuration — shaft size, fluid media, temperature/pressure rating, material compatibility — for your application.
- Commissioning support: help with installation, alignment, and initial operation monitoring (leak checks, pressure, temperature, rotation, fluid flow) to catch issues early.
- Spare-parts supply: availability of replacement seal faces, O-rings/gaskets, bearings (if applicable), and cartridge components — ensures rapid maintenance turnaround.
- Lifecycle and upgrade planning: as service requirements change (e.g., fluid media, pressure, temperature), review seal materials and configurations for suitability; upgrade to a more robust design if necessary.
- Preventive maintenance programme: periodic inspections and performance tracking to maximize mean time between maintenance and reduce total cost of ownership.
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Contact HydroMax Seal
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E-Mail: sales@hydromaxseal.com
Address: 18511 Beaumont Hwy Building D
Houston, TX
77049
