End Cap
Retaining Ring
Secure Seal
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Flange End Cover Retaining Ring
Flange End Cover Retaining Ring for ROV - 90-160mm, Aluminum, Black Oxide
$8.99 USD
Customization Service
We are the OEM ODM manufacturer. For bulk orders and custom solutions, please contact us at official@hobbywater.com
When will I get my order?
We prioritize fast order processing. For in-stock items, orders placed before 4:00 PM (Beijing Time) will be shipped the same day. Standard orders typically ship within one week, while customized orders require approximately 15-30 business days for production and delivery. Delivery times may vary under special circumstances.
Shipping Methods
We ship to most countries worldwide. However, please ensure compliance with your local import regulations.
- For the USA: We offer tax-inclusive shipping options. Expedited orders are shipped via DHL, UPS, or FedEx. Note: DHL does not allow undervaluation.
- For other countries: Tax-inclusive shipping is available upon request. Otherwise, orders will be shipped via 4PX by default.
For specific shipping requirements, please contact us in advance.
🔄 Wear-Resistant ⚫ Black Oxidized 🔒 Dual Function 📏 4 Sizes
Flange End Cover Retaining Ring
Durable, Wear-Resistant Solution for Dome & End Cover Retaining
Designed to secure both dome covers and end caps to flanges on underwater sealed cabins. Prevents thread wear from direct screw contact with acrylic end covers, providing a more reliable and wear-resistant connection.
✨ Customization Available 🔧 Screws & O-rings not included
Key Features
Prevents Thread Wear
Eliminates direct screw contact with acrylic, extending component life.
Dual Function
Fixes both dome covers and end caps to flanges.
Corrosion Resistant
Black oxidized aluminum alloy construction.
More Reliable
Provides stronger, more durable hold than screws alone.
Four Standard Sizes
Fits 90-160mm flanges (80-150mm inner diameter).
Size Compatibility
| Retaining Ring Size | Flange OD | Matching Flange ID |
|---|---|---|
| 90mm | 90mm | 80mm |
| 110mm | 110mm | 100mm |
| 130mm | 130mm | 120mm |
| 160mm | 160mm | 150mm |
Why Use a Retaining Ring?
❌ Without Retaining Ring
- 🔩 Direct screw contact → wear
- 📉 Durability decreases over time
- ⚡ Hold strength: standard
- ⏳ Limited component lifespan
✅ With Retaining Ring
- 🛡️ No contact → no wear
- 📈 Maintains durability
- 💪 Enhanced hold strength
- ♾️ Extended component lifespan
Technical Drawings
Retaining Ring Dimension Drawing 1 — 90mm size
Retaining Ring Dimension Drawing 2 — 110mm size
Retaining Ring Dimension Drawing 3 — 130mm size
📦 Package Includes
- 1 × Flange End Cover Retaining Ring (size as selected)
- Screws and O-rings not included
🚢 Applications
- ROV pressure cabin dome cover fixation
- AUV end cap sealing retention
- Underwater camera housing end covers
- Scientific marine instrument enclosures
- Custom submersible pressure vessels
What are the different part configurations for the chamber assembly, and do they need grease?
Option 1 – One dome + one end cap (assembled):
- 1x Hemisphere dome, 1x Chamber tube, 1x Flange, 1x End cap, 1x End cap retaining ring
Option 2 – One dome + one end cap (all separate parts):
- 1x Single dome, 2x Flanges, 2x End cap retaining rings, 1x Chamber tube, 1x End cap
Both Option 1 and Option 2 require 1x Dow Corning grease.
Option 3 – Two end caps:
- 1x Chamber tube, 2x Flanges, 2x End caps, 2x End cap retaining rings
Option 3 does NOT need grease.
Sealed Chamber · Installation SOP
Image unavailable. Please follow the text steps below.
1. Chamfer the Inner Edge
FILE
Use a file to grind a 1–2 mm chamfer on the inner circumference of the acrylic tube.
Purpose: Enables smooth flange insertion and prevents damage to the sealing ring.
›
Use a fine-tooth file. Apply even pressure to achieve a smooth, burr-free surface.
2. Apply Lubricant
LUBRICATE
Evenly coat the entire sealing ring with sealing ring lubricant.
Purpose: Ensure full coverage and remove all dust or particles to maintain seal integrity.
›
Clean the sealing ring with a lint-free cloth before application. Apply a thin, even layer only.
3. Install Cover & Pressure Plate
ASSEMBLE
Place the sealing ring, then put on the chamber cover. Install the pressure plate on top.
Purpose: Ensures optimal sealing and extends the service life of the cover.
›
Tighten pressure plate screws in a diagonal pattern to distribute pressure evenly.
4. Secure Feed-Through Screws
FASTEN
Screw in the feed-through screws. Thread-locking adhesive is recommended to prevent loosening.
Purpose: Prevents screws from loosening due to vibration or long-term use.
›
Use medium-strength thread locker (e.g., Loctite 243). Apply to 2–3 threads per screw.
5. Press Fit the Sealing Ring
FINAL
Fit the sealing ring and press it evenly into the acrylic tube until fully seated.
Purpose: Ensures the sealing ring is fully seated, creating a reliable seal.
›
Use a pressing tool or a soft-faced mallet if needed. Never use metal tools directly on the tube wall.
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Final Installation Checklist
- Sealing ring seated evenly with no twisting
- Lubricant applied uniformly, free of particles
- Cover and pressure plate secured without play
- Feed-through screws treated with thread locker
- Sealing ring fully pressed into acrylic tube
