The Festo HEL-3/4-D-MAXI-NPT is a pneumatic soft-start valve that gradually pressurizes and exhausts pneumatic systems, ensuring efficient and reliable operation.
Product Modelhel-3/4-d-maxi-npt
Material Number173922
Product ID5828
Stock on Request
Last updated: 8/29/2026
Key Features
1
Precise Air Pressure ControlThe Festo HEL-3/4-D-MAXI-NPT offers precise control over air pressure, allowing for gradual pressurization and exhaust. This feature is crucial in applications where sudden pressure changes can be detrimental.
2
High-Performance DesignDesigned for high-performance applications, this valve ensures efficient operation even under demanding conditions. Its robust construction and reliable components make it a trusted choice for various industries.
3
Versatile Mounting OptionsThe valve is available in various mounting configurations, including free hanging and in-line installations. This versatility makes it easy to integrate into existing systems without significant modifications.
4
Compliance with Industry StandardsThe HEL-3/4-D-MAXI-NPT complies with ISO 1179-1 and ISO 228-1, ensuring that it meets the highest standards of quality and performance. This compliance provides assurance for users in terms of reliability and safety.
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
Specifications may be subject to change without notice
Parameter
Value
Parameter
Value
Width dimension
65mm
Exhaust air function
With flow control option
Actuation type
Pneumatic
Sealing principle
Soft
Mounting position
Any
Manual override
None
5
Easy Integration and MaintenanceThe valve is designed for easy integration with other Festo products, such as the HE and HEE on/off valves. Additionally, its modular design makes maintenance straightforward, reducing downtime and increasing overall productivity.
6
Feature### Additional Information
7
- Operating Pressure44 ~ 232 PSI (3 ~ 16 bar)
Structural design
Piston gate valve
Reset method
Mechanical spring
Type of control
Direct
Flow direction
Non-reversible
Symbol
00991513
Valve function
2/2, closed, monostable
Operating pressure
3bar 16bar
b-value
0.38
C value
33.9l/sbar
Standard nominal flow rate
6000l/min
Operating medium
Compressed air as per ISO 8573-1:2010 [7:4:4] Inert gas
Information on operating and pilot media
Operation with oil lubrication possible (required for further use)
Corrosion resistance class (CRC)
2 - Moderate corrosion stress
LABS (PWIS) conformity
VDMA24364-B1/B2-L
Air quality class at the output
Compressed air as per ISO 8573-1:2010 [7:4:4] Inert gas
Temperature of medium
-10°C 60°C
Ambient temperature
-10°C 60°C
Product weight
394g
Type of mounting
Line installation With accessories
Pneumatic connection 1
3/4 NPT
Pneumatic connection 2
3/4 NPT
Note on materials
RoHS-compliant
Seals material
NBR
Housing material
Die-cast aluminum
Manufacturer ID
173922
Festo HEL-3/4-D-MAXI-NPT Pneumatic Soft-Start Valve - Reliable Air Pressure Control | INDSLT
