Prevost
Prevost PrevoS1 ESI Safety Quick Male Coupler - High Flow Profile
- Availability:
- Usually Ships in 5-7 Business Days
- Weight:
- 0.00 LBS
Description
Prevost PrevoS1 ESI Safety Quick Male Coupler - High Flow Profile
Prevost PrevoS1 ESI Safety Quick Male Couplers provide a controlled compressed-air connection with the integrated safety disconnection of the PrevoS1 coupling system. This listing includes 3/8" and 1/2" ID-passage couplers with male NPT and male BSPP thread options for professional pneumatic systems.
The PrevoS1 safety mechanism decompresses downstream compressed air before releasing the mating plug. This controlled sequence helps reduce sudden hose movement and hose-whip hazards while providing simple push-button operation for frequent pneumatic tool and equipment changes.
Product Highlights
- Prevost PrevoS1 safety quick male coupler
- ESI safety coupling family
- 3/8" and 1/2" ID-passage options
- Male NPT and male BSPP thread options
- Thread sizes from 1/4" through 3/4"
- Nine configurations on one listing
- One-button safety disconnection
- Controlled decompression before plug release
- Helps reduce hose whip during disconnection
- Direct threaded installation
- Designed for professional compressed-air systems
Available Configurations
| ESI 071251 | 3/8" ID Passage x 1/4" Male NPT |
|---|---|
| ESI 071252 | 3/8" ID Passage x 3/8" Male NPT |
| ESI 071253 | 3/8" ID Passage x 1/2" Male NPT |
| ESI 071151HE | 3/8" ID Passage x 1/4" Male BSPP |
| ESI 071152HE | 3/8" ID Passage x 3/8" Male BSPP |
| ESI 071153HE | 3/8" ID Passage x 1/2" Male BSPP |
| ESI 111252EB | 1/2" ID Passage x 3/8" Male NPT |
| ESI 111253EB | 1/2" ID Passage x 1/2" Male NPT |
| ESI 111254EB | 1/2" ID Passage x 3/4" Male NPT |
Technical Specifications
| Manufacturer | Prevost |
|---|---|
| Product Series | PrevoS1 |
| Product Type | Safety Quick Male Coupler |
| Coupling Family | ESI |
| Available ID Passages | 3/8" and 1/2" |
| Thread Standards | NPT and BSPP |
| Available Male Thread Sizes | 1/4", 3/8", 1/2", and 3/4" |
| Fluid | Compressed Air |
| Disconnection System | Controlled Decompression Followed by Plug Release |
Choose the Correct ID Passage
3/8" ID Passage - ESI 07
The ESI 07 family uses a 3/8" ID passage and is available with both NPT and BSPP male-thread connections.
- 1/4" Male NPT
- 3/8" Male NPT
- 1/2" Male NPT
- 1/4" Male BSPP
- 3/8" Male BSPP
- 1/2" Male BSPP
1/2" ID Passage - ESI 11EB
The larger ESI 11EB family uses a 1/2" ID passage and is available with several male NPT connection sizes.
- 3/8" Male NPT
- 1/2" Male NPT
- 3/4" Male NPT
NPT vs. BSPP Male Threads
NPT and BSPP are different thread standards and are not interchangeable. The nominal thread size may look similar, but the thread geometry and sealing method differ.
- NPT uses a tapered pipe-thread form.
- BSPP uses a parallel pipe-thread form.
- Verify both thread size and thread standard before ordering.
- Do not force an NPT component into a BSPP connection or vice versa.
- Quick-connect compatibility is separate from threaded connection compatibility.
3/8" ID Passage - Male NPT Options
1/4" Male NPT
ESI 071251 combines the 3/8" ID passage with a 1/4" male NPT connection.
3/8" Male NPT
ESI 071252 combines the 3/8" ID passage with a 3/8" male NPT connection.
1/2" Male NPT
ESI 071253 combines the 3/8" ID passage with a 1/2" male NPT connection.
3/8" ID Passage - Male BSPP Options
1/4" Male BSPP
ESI 071151HE combines the 3/8" ID passage with a 1/4" male BSPP connection.
3/8" Male BSPP
ESI 071152HE combines the 3/8" ID passage with a 3/8" male BSPP connection.
1/2" Male BSPP
ESI 071153HE combines the 3/8" ID passage with a 1/2" male BSPP connection.
1/2" ID Passage - Male NPT Options
3/8" Male NPT
ESI 111252EB combines the 1/2" ID passage with a 3/8" male NPT connection.
1/2" Male NPT
ESI 111253EB combines the 1/2" ID passage with a 1/2" male NPT connection.
3/4" Male NPT
ESI 111254EB combines the 1/2" ID passage with a 3/4" male NPT connection.
Understanding ID Passage vs. Thread Size
The ID passage and male thread size are different specifications.
The ID passage describes the internal airflow path and quick-coupling family. The male thread describes how the coupler installs into the compressed-air system.
- ESI 07 models use a 3/8" ID passage.
- ESI 11EB models use a 1/2" ID passage.
- A 1/2" male thread does not automatically mean a 1/2" internal passage.
- Thread size does not determine mating-plug compatibility.
- Verify the coupler family, ID passage, thread type, and thread size before ordering.
Same Thread Size, Different Coupler Families
Several thread sizes are available in more than one ESI family. For example:
- ESI 071252: 3/8" ID Passage x 3/8" MNPT
- ESI 111252EB: 1/2" ID Passage x 3/8" MNPT
- ESI 071253: 3/8" ID Passage x 1/2" MNPT
- ESI 111253EB: 1/2" ID Passage x 1/2" MNPT
Although the threaded connection can be the same size, the internal passage and quick-coupling family are different.
PrevoS1 Safety Disconnection
The PrevoS1 safety system is designed to provide controlled compressed-air disconnection. Instead of immediately releasing a pressurized plug, the coupler first relieves downstream pressure.
After downstream air pressure is reduced, the plug can be released. This helps reduce sudden hose movement during pneumatic tool changes.
- Simple push-button operation
- Controlled decompression before plug release
- Helps reduce hose-whip hazards
- Designed for frequent tool changes
- Integrated safety function
Direct Male-Thread Installation
The male-thread design allows the coupler to install directly into a compatible female-threaded compressed-air component.
- Compressed-air manifolds
- Regulator and filter assemblies
- Distribution blocks
- Pneumatic equipment
- Air piping outlets
- Hose adaptors
- Other compatible female-thread ports
Common Applications
Industrial & Manufacturing
- Manufacturing facilities
- Assembly lines
- Machine shops
- Production machinery
- Plant maintenance
- Pneumatic equipment
- Compressed-air distribution systems
Shop & Service
- Automotive repair shops
- Equipment service facilities
- Maintenance departments
- Pneumatic tool stations
- Compressed-air manifolds
- Regulator assemblies
- Workstation air drops
How to Select the Correct Coupler
- Step 1: Confirm the required ESI quick-coupling family.
- Step 2: Determine whether a 3/8" or 1/2" ID passage is required.
- Step 3: Identify whether the system uses NPT or BSPP threads.
- Step 4: Determine the required male thread size.
- Step 5: Select the corresponding variant.
- Step 6: Verify mating-plug compatibility before installation.
Complete Variant Reference
| ESI 071251 | 3/8" ID Passage x 1/4" MNPT |
|---|---|
| ESI 071252 | 3/8" ID Passage x 3/8" MNPT |
| ESI 071253 | 3/8" ID Passage x 1/2" MNPT |
| ESI 071151HE | 3/8" ID Passage x 1/4" MBSPP |
| ESI 071152HE | 3/8" ID Passage x 3/8" MBSPP |
| ESI 071153HE | 3/8" ID Passage x 1/2" MBSPP |
| ESI 111252EB | 1/2" ID Passage x 3/8" MNPT |
| ESI 111253EB | 1/2" ID Passage x 1/2" MNPT |
| ESI 111254EB | 1/2" ID Passage x 3/4" MNPT |
Installation & Safety Guidance
- Depressurize the compressed-air system before installation, removal, or service.
- Verify the required NPT or BSPP thread standard before installation.
- Confirm that the male thread size matches the female system port.
- Use sealing methods appropriate for the selected thread standard.
- Do not force NPT and BSPP connections together.
- Do not select the coupler based only on threaded connection size.
- Verify mating-plug compatibility before pressurizing the system.
- Inspect the coupler and mating plug periodically for wear, contamination, damage, or leakage.
- Replace damaged or excessively worn components.
- Compressed-air components should be installed and serviced 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 071251, ESI 071252, ESI 071253, ESI 071151HE, ESI 071152HE, ESI 071153HE, ESI 111252EB, ESI 111253EB, and ESI 111254EB.
What ID passage sizes are available?
This listing includes 3/8" and 1/2" ID-passage couplers.
What thread standards are available?
The 3/8" ID-passage family includes both male NPT and male BSPP options. The 1/2" ID-passage ESI 11EB variants shown in this listing use male NPT connections.
Which models use male BSPP threads?
ESI 071151HE, ESI 071152HE, and ESI 071153HE use male BSPP connections.
Which models use a 3/8" ID passage?
ESI 071251, ESI 071252, ESI 071253, ESI 071151HE, ESI 071152HE, and ESI 071153HE use the 3/8" ID-passage family.
Which models use a 1/2" ID passage?
ESI 111252EB, ESI 111253EB, and ESI 111254EB use the 1/2" ID-passage family.
Are NPT and BSPP threads interchangeable?
No. NPT and BSPP are different thread standards and should not be treated as interchangeable.
Does thread size determine the ID passage?
No. For example, both ESI 071253 and ESI 111253EB use a 1/2" male NPT connection, but they have different ID passages.
How does the PrevoS1 safety release work?
The PrevoS1 system decompresses downstream compressed air before releasing the mating plug, helping reduce sudden hose movement during disconnection.
Can I select the coupler based only on thread size?
No. Verify the thread standard, thread size, ID passage, and mating quick-coupling profile before ordering.
Important Ordering Notes
- This listing includes nine Prevost PrevoS1 ESI safety quick male couplers.
- ESI 071251: 3/8" ID passage x 1/4" MNPT.
- ESI 071252: 3/8" ID passage x 3/8" MNPT.
- ESI 071253: 3/8" ID passage x 1/2" MNPT.
- ESI 071151HE: 3/8" ID passage x 1/4" MBSPP.
- ESI 071152HE: 3/8" ID passage x 3/8" MBSPP.
- ESI 071153HE: 3/8" ID passage x 1/2" MBSPP.
- ESI 111252EB: 1/2" ID passage x 3/8" MNPT.
- ESI 111253EB: 1/2" ID passage x 1/2" MNPT.
- ESI 111254EB: 1/2" ID passage x 3/4" MNPT.
- NPT and BSPP are different thread standards.
- Verify ID passage, thread type, thread size, and mating-plug compatibility before ordering.
