Festo HEL-3/4-D-MIDI-NPT Soft-Start Valve: Efficient Pressure Control

Selling Points

1The HEL-3/4-D-MIDI-NPT soft-start valve ensures gradual pressure build-up, preventing sudden changes that could damage equipment.
2Built with die-cast aluminum housing and NBR seals, this valve offers high corrosion resistance and durability.
3Actuated by compressed air, this valve is easy to integrate into pneumatic systems and operates within a wide pressure range (0.3 MPa to 1.6 MPa).
4Equipped with a throttleable exhaust-air function, this valve allows for precise control over airflow, making it suitable for various applications.
5Meets ISO 8573-1:2010 standards for air purity and is RoHS-compliant, ensuring it meets stringent environmental and safety regulations.

Detailed engineering parameters based on manufacturer documentation

Parameter	Value	Parameter	Value
Width dimension	55mm	Exhaust air function	With flow control option
Actuation type	Pneumatic	Sealing principle	Soft
Mounting position	Any	Manual override	None
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	0.48
C value	20.5l/sbar	Standard nominal flow rate	3800l/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	270g
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	173921

Specifications may be subject to change without notice