Product Description
The Festo NVF3-MOH-5/2-K-1/4-EX is a pilot-controlled solenoid valve with NAMUR port pattern to VDI/VDE 3845, designed for direct mounting on quarter-turn actuators and process valves. This 5/2-way monostable valve (convertible to 3/2-way) features a mechanical spring return, soft sealing plate seat design, and ATEX certification for use in explosive gas and dust atmospheres (Zone 1, 2, 21, 22).
Key Features & Advantages
ATEX Zone 1/21 Certified for Hazardous Areas: Certified for explosive environments with II 2G (gas) and II 2D (dust) categories, ignition protection Ex h IIC T6 Gb (gas) and Ex h IIIC T70°C Db (dust), ambient temperature range -5°C to +40°C.
NAMUR Port Pattern to VDI/VDE 3845: Standardised NAMUR interface enables direct mounting onto pneumatic quarter-turn actuators and process valves, eliminating additional brackets and tubing.
5/2 or 3/2 Monostable Valve Function: Configured as 5/2-way monostable (single solenoid) with mechanical spring return; convertible to 3/2-way function for flexible application matching.
900 L/min High Flow Rate with Soft Sealing: Delivers 900 L/min standard nominal flow rate through 7 mm nominal width, with soft sealing principle and plate seat design for reliable shut-off.
Detenting/Non-Detenting Manual Override: Equipped with both detenting (locking) and non-detenting (push-button) manual override options, enabling easy valve actuation during commissioning, testing, and maintenance.
Technical Specifications
Brand: Festo
Model: NVF3-MOH-5/2-K-1/4-EX
Product No.: 535987
GTIN: 4052568170370
Valve Function: 5/2-way or 3/2-way, monostable
Actuation Type: Electrical, pilot-controlled
Standard Nominal Flow Rate: 900 L/min
Operating Pressure: 2 bar to 10 bar
Width: 53 mm
Nominal Width: 7 mm
Design: Plate seat valve with soft sealing
Reset Method: Mechanical spring
Manual Override: Detenting (locking) and non-detenting (push-button)
Mounting Position: Any
Conforms to Standard: VDI/VDE 3845 (NAMUR)
Port Pattern: NAMUR connection diagram (ports 2, 4)
Pneumatic Connections (Ports 1, 3, 5): G1/4 female thread
Pilot Exhaust Port (84): M5
Switching Time (On): 50 ms
Switching Time (Off): 100 ms
Exhaust Air Function: With flow control option
Flow Direction: Non-reversible
Operating Medium: Compressed air to ISO 8573-1:2010 [7:4:4]
Medium Temperature: -5°C to +40°C
Ambient Temperature: -5°C to +40°C
Corrosion Resistance Class (CRC): 1 – Low corrosion stress
LABS (PWIS) Conformity: VDMA24364-B1/B2-L
Housing Material: Die-cast aluminium
Seal Material: NBR
Product Weight: 280 g
Mounting Type: On terminal strip / manifold rail
ATEX Category Gas: II 2G
ATEX Category Dust: II 2D
Ignition Protection Gas: Ex h IIC T6 Gb
Ignition Protection Dust: Ex h IIIC T70°C Db
Applicable Zones: Zone 1 (ATEX), Zone 2 (ATEX), Zone 21 (ATEX), Zone 22 (ATEX)
Venting Hole Connection: Internal
CE Marking: As per EU Explosion Protection Directive (ATEX)
Ideal For
Quarter-turn pneumatic actuator control, process automation valve actuation (butterfly valves, ball valves), hazardous area installations requiring ATEX certification (Zone 1, 2, 21, 22), chemical and petrochemical processing, pharmaceutical manufacturing, and on/off control of double-acting pneumatic actuators in explosive environments.
Why Choose FESTO NVF3-MOH-5/2-K-1/4-EX?
Choose the Festo NVF3-MOH-5/2-K-1/4-EX for its ATEX Zone 1/21 certification, NAMUR VDI/VDE 3845 interface enabling direct actuator mounting, convertible 5/2 to 3/2 monostable function, 900 L/min high flow rate, and dual detenting/non-detenting manual override – delivering safe, reliable solenoid valve control for hazardous area process automation applications.
Tags
#Festo #NVF3MOH5/2K1/4EX #535987 #SolenoidValve #NAMUR #ATEX #5Way2Way #HazardousArea #ExZone1 #MalaysiaSupplier
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