Prevost
Prevost PrevoS1 Stainless Steel Safety Quick Female Coupler - High Flow Profile
- Availability:
- Usually Ships in 5-7 Business Days
- Weight:
- 0.00 LBS
Description
Prevost PrevoS1 Stainless Steel Safety Quick Female Coupler - High Flow Profile
Prevost PrevoS1 ESI 11 Safety Quick Female Couplers provide a high-capacity compressed-air connection with a 1/2" ID passage and female NPT system connection. This listing includes 3/8", 1/2", and 3/4" female NPT configurations for industrial pneumatic systems requiring the larger ESI 11 coupling profile.
The PrevoS1 safety coupling system is designed to decompress downstream compressed air before releasing the mating plug. This controlled disconnection sequence helps reduce sudden hose movement and hose-whip hazards during pneumatic tool and equipment changes.
Product Highlights
- Prevost PrevoS1 safety quick female coupler
- ESI 11 coupling family
- 1/2" ID passage on all configurations
- Female NPT system connection
- Available in 3/8", 1/2", and 3/4" FNPT
- Three configurations on one listing
- High-capacity compressed-air connection
- Controlled decompression before plug release
- Helps reduce hose whip during disconnection
- Push-button PrevoS1 safety operation
- Designed for professional pneumatic systems
Available Configurations
| ESI 111202 | 1/2" ID Passage x 3/8" Female NPT |
|---|---|
| ESI 111203 | 1/2" ID Passage x 1/2" Female NPT |
| ESI 111204 | 1/2" ID Passage x 3/4" Female NPT |
Technical Specifications
| Manufacturer | Prevost |
|---|---|
| Product Series | PrevoS1 |
| Product Type | Safety Quick Female Coupler |
| Coupling Family | ESI 11 |
| Coupling Profile | 10.4 mm |
| ID Passage | 1/2" |
| Connection Style | Female NPT |
| Available Thread Sizes | 3/8", 1/2", and 3/4" FNPT |
| Fluid | Compressed Air |
| Disconnection System | Controlled Decompression Followed by Plug Release |
1/2" ID Passage
All three couplers in this listing use a 1/2" ID passage. The internal passage remains the same while the female NPT system connection changes between variants.
- ESI 111202: 1/2" ID passage x 3/8" FNPT
- ESI 111203: 1/2" ID passage x 1/2" FNPT
- ESI 111204: 1/2" ID passage x 3/4" FNPT
Available Female NPT Connections
3/8" Female NPT
ESI 111202 combines the ESI 11 1/2" ID passage with a 3/8" female NPT connection.
1/2" Female NPT
ESI 111203 combines the ESI 11 1/2" ID passage with a 1/2" female NPT connection.
3/4" Female NPT
ESI 111204 combines the ESI 11 1/2" ID passage with a 3/4" female NPT connection.
Understanding ID Passage vs. Female Thread Size
The 1/2" ID passage and female NPT size describe different parts of the coupler.
The ID passage describes the internal airflow path through the quick coupling. The female NPT dimension identifies the threaded system connection used to install the coupler onto a compatible male NPT component.
- All three models use the same 1/2" ID passage.
- The female NPT connection is available in 3/8", 1/2", or 3/4".
- Thread size does not determine mating-plug compatibility.
- Do not select a coupler based only on the female NPT size.
- Verify both the ESI 11 coupling profile and thread size before ordering.
PrevoS1 Safety Disconnection
The PrevoS1 safety system is designed to provide a controlled compressed-air disconnection sequence. Instead of immediately releasing a pressurized mating plug, the coupling first decompresses the downstream air line.
After pressure is relieved, the mating plug can be released from the coupler. This helps reduce sudden hose movement and the hose-whip hazard associated with disconnecting pressurized pneumatic equipment.
- Controlled downstream decompression
- Plug release follows decompression
- Helps reduce hose-whip hazards
- Push-button operation
- Designed for repeated professional use
Direct Female NPT Installation
The female NPT inlet allows the coupler to install directly onto a compatible male NPT compressed-air component.
- Male-threaded manifolds
- Compressed-air piping fittings
- Regulators and filters
- Pneumatic equipment
- Hose adaptors
- Distribution components
- Other compatible male NPT connections
High-Capacity ESI 11 Profile
The ESI 11 family uses the larger 10.4 mm coupling profile with a 1/2" internal passage, making these couplers appropriate where a larger compressed-air flow path is required.
Because the coupling profile and system-side thread are separate specifications, confirm that the mating plug is designed for the ESI 11 profile regardless of which female NPT size is selected.
Safety & Operator Benefits
Controlled Release
The PrevoS1 mechanism relieves downstream compressed-air pressure before the mating plug is released.
Reduced Hose Whip
Decompression before separation helps reduce sudden movement of the connected hose or pneumatic tool.
High-Flow Connection
The larger ESI 11 coupling family provides a 1/2" internal passage for demanding compressed-air applications.
Common Applications
Industrial & Manufacturing
- Manufacturing facilities
- Production equipment
- Assembly lines
- Machine shops
- Plant maintenance
- Pneumatic machinery
- High-demand compressed-air systems
Shop & Service
- Automotive service facilities
- Heavy equipment shops
- Maintenance departments
- Large pneumatic tools
- Compressed-air manifolds
- Regulator and filter assemblies
- Workstation air connections
How to Select the Correct Coupler
- Step 1: Confirm that the mating plug uses the ESI 11 / 10.4 mm coupling profile.
- Step 2: Confirm that the 1/2" ID passage is appropriate for the application.
- Step 3: Determine the size of the male NPT connection on the equipment or system.
- Step 4: Choose the corresponding 3/8", 1/2", or 3/4" female NPT coupler.
- Step 5: Verify pressure, temperature, and application requirements before installation.
Complete Variant Reference
| ESI 111202 | 1/2" ID Passage x 3/8" FNPT |
|---|---|
| ESI 111203 | 1/2" ID Passage x 1/2" FNPT |
| ESI 111204 | 1/2" ID Passage x 3/4" FNPT |
Installation & Safety Guidance
- Depressurize the compressed-air system before installation, removal, or service.
- Confirm the male NPT fitting matches the selected female NPT coupler size.
- Use thread-sealing materials suitable for compressed-air NPT connections.
- Avoid overtightening threaded connections.
- Do not select a coupler based only on thread size.
- Verify ESI 11 mating-plug compatibility before pressurizing the system.
- Inspect couplers and plugs periodically for wear, contamination, damage, or leakage.
- Replace damaged or excessively worn components.
- Do not exceed the rating of the lowest-rated component in the compressed-air system.
- Installation and service should be performed by qualified personnel.
Product Documents
Review the Prevost PrevoS1 Safety Couplers specification sheet for additional information about PrevoS1 safety coupling operation, controlled decompression, coupling profiles, and compressed-air applications.
Frequently Asked Questions
Which part numbers are included in this listing?
This listing includes ESI 111202, ESI 111203, and ESI 111204.
What ID passage do these couplers use?
All three couplers have a 1/2" ID passage.
What female NPT sizes are available?
The available connection sizes are 3/8", 1/2", and 3/4" female NPT.
Which model has a 3/8" female NPT connection?
ESI 111202 has a 3/8" female NPT connection and a 1/2" ID passage.
Which model has a 1/2" female NPT connection?
ESI 111203 has a 1/2" female NPT connection and a 1/2" ID passage.
Which model has a 3/4" female NPT connection?
ESI 111204 has a 3/4" female NPT connection and a 1/2" ID passage.
Does the female thread size change the ID passage?
No. All three variants use the same 1/2" ID passage.
What coupling profile does this family use?
These couplers belong to the larger ESI 11 family with a 10.4 mm coupling profile.
How does the PrevoS1 safety release work?
The coupling decompresses downstream compressed air before releasing the mating plug, helping reduce sudden hose movement during disconnection.
Can I select the coupler based only on NPT size?
No. Verify both the ESI 11 quick-connect profile and the required female NPT connection before ordering.
Important Ordering Notes
- This listing includes three Prevost PrevoS1 ESI 11 safety quick female couplers.
- ESI 111202: 1/2" ID passage x 3/8" FNPT.
- ESI 111203: 1/2" ID passage x 1/2" FNPT.
- ESI 111204: 1/2" ID passage x 3/4" FNPT.
- All variants use the larger ESI 11 / 10.4 mm coupling profile.
- All variants use a 1/2" ID passage.
- Thread size and quick-coupling compatibility are separate specifications.
- Verify mating-plug compatibility before ordering.
