Valves with NAMUR-Interface - Solenoid valves | Hafner

Name: Valves with NAMUR-Interface - Solenoid Valves | Hafner
Brand: Hafner
SKU: Valves with NAMUR-Interface - Solenoid valves | Hafner

Hafner Electromagnetic Valves with NAMUR Interface

Hafner NAMUR solenoid valves are designed for direct mounting on pneumatic rotary actuators used in process valve automation. The NAMUR 1/4” interface complies with VDI/VDE 3845 (NAMUR 1), with 1/2” variants also available. Installation utilizes O-rings, mounting screws, and a locating pin, minimizing external pilot air tubing.

Available Functions

3/2 NC or NO: For single-acting actuators with spring return.
5/2 monostable: For double-acting actuators, maintains position with continuous electrical signal.
5/2 bistable: Latches in last position until next electrical command.
NAMUR-Flex 3/2–5/2: Convertible function via Flex-Pack or flow adjustment with DRF.
5/3: Center closed or exhaust, for specific actuator behavior on signal loss.

Technical Selection Data

Typical flow rates: 1250 l/min (G 1/4”), 2250 l/min (G 3/8”), 3000 l/min (G 1/2”). Operating pressures: 1…10 bar, 1.5…10 bar, 2…10 bar, or 2.5…10 bar depending on series and return type. Coil consumption: 3 W DC / 5 VA AC; MNK low power: 1.8 W DC / 3 VA AC.

Application Criteria

Selection is based on:

Single-acting or double-acting actuator type
Required fail-safe position on power loss
NAMUR 1/4” or 1/2” interface
G or NPT supply thread
Flow rate vs actuator chamber volume and cycle time
Coil voltage, connector type, and manual override requirements

Maintenance

Check O-rings between valve and actuator, instrument air quality, leakage at exhaust ports 3/5, correct coil voltage, and silencer condition. For ATEX or stainless steel installations, use certified versions; coil replacement alone is insufficient for compliance.

Datasheet and documents

Description

Solenoid valve with NAMUR interface | monostable | air spring return | with manual override

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 310 701	G 1/4"	1250 l/min	2...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]
MNH 310 101	G 3/8"	2250 l/min	1,5...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]
MNH 310 121	G 1/2"	3000 l/min	1...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/2"]
MNOH 310 701	G 1/4"	1250 l/min	2...10 bar	Single solenoid \| NO	3 W / 5 VA	NAMUR [1/4"]
MNOH 310 121	G 1/2"	3000 l/min	1...10 bar	Single solenoid \| NO	3 W / 5 VA	NAMUR [1/2"]
MNH 310 701 NPT	NPT 1/4"	1250 l/min	2...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]
MNH 310 121 NPT	NPT 1/2"	3000 l/min	1...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/2"]

Solenoid valve with NAMUR interface | monostable | air spring return | with manual override | low power consumption

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNK 310 701	G 1/4"	1250 l/min	2...10 bar	Single solenoid \| NC	1,8 W / 3 VA	NAMUR [1/4"]

Solenoid valve with NAMUR interface | monostable | NC | combined spring return | with manual override

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 311 701	G 1/4"	1250 l/min	2,5...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]
MNH 311 101	G 3/8"	2250 l/min	2,5...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]
MNH 311 121	G 1/2"	3000 l/min	2...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/2"]
MNH 311 701 NPT	NPT 1/4"	1250 l/min	2,5...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]
MNH 311 121 NPT	NPT 1/2"	3000 l/min	2...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/2"]

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNK 311 701	G 1/4"	1250 l/min	2,5...10 bar	Single solenoid \| NC	1,8 W / 3 VA	NAMUR [1/4"]

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 310 711	G 1/4"	1250 l/min	2...10 bar	Single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]

Solenoid valve with NAMUR interface | monostable | air spring return | with manual override

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 510 701	G 1/4"	1250 l/min	2...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/4"]
MNH 510 101	G 3/8"	2250 l/min	1,5...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/4"]
MNH 510 121	G 1/2"	3000 l/min	1...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/2"]
MNH 510 701 NPT	NPT 1/4"	1250 l/min	2...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/4"]
MNH 510 121 NPT	NPT 1/2"	3000 l/min	1...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/2"]

Solenoid valve with NAMUR interface | monostable | air spring return | with manual override | low power consumption

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNK 510 701	G 1/4"	1250 l/min	2...10 bar	Single solenoid	1,8 W / 3 VA	NAMUR [1/4"]

Solenoid valve with NAMUR interface | monostable | combined spring return | with manual override

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 511 701	G 1/4"	1250 l/min	2,5...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/4"]
MNH 511 101	G 3/8"	2250 l/min	2,5...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/4"]
MNH 511 121	G 1/2"	3000 l/min	2...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/2"]
MNH 511 701 NPT	NPT 1/4"	1250 l/min	2,5...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/4"]
MNH 511 121 NPT	NPT 1/2"	3000 l/min	2...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/2"]

Solenoid valve with NAMUR interface | monostable | combined spring return | with manual override | low power consumption

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNK 511 701	G 1/4"	1250 l/min	2,5...10 bar	Single solenoid	1,8 W / 3 VA	NAMUR [1/4"]

Solenoid valve with NAMUR interface | monostable | air spring return | with manual override | ports 2 and 4 are swapped

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 510 711	G 1/4"	1250 l/min	2...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/4"]

Solenoid valve with NAMUR interface | monostable | combined spring return | with manual override | ports 2 and 4 are swapped

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 511 711	G 1/4"	1250 l/min	2,5...10 bar	Single solenoid	3 W / 5 VA	NAMUR [1/4"]

Solenoid valve with NAMUR interface | bistable | with manual override

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 520 701	G 1/4"	1250 l/min	2...10 bar	Double solenoid	3 W / 5 VA	NAMUR [1/4"]
MNH 520 101	G 3/8"	2250 l/min	1,5...10 bar	Double solenoid	3 W / 5 VA	NAMUR [1/4"]
MNH 520 121	G 1/2"	3000 l/min	1...10 bar	Double solenoid	3 W / 5 VA	NAMUR [1/2"]
MNH 520 701 NPT	NPT 1/4"	1250 l/min	2...10 bar	Double solenoid	3 W / 5 VA	NAMUR [1/4"]
MNH 520 121 NPT	NPT 1/2"	3000 l/min	1...10 bar	Double solenoid	3 W / 5 VA	NAMUR [1/2"]

Solenoid valve with NAMUR interface | bistable | with manual override | low power consumption

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNK 520 701	G 1/4"	1250 l/min	2...10 bar	Double solenoid	1,8 W / 3 VA	NAMUR [1/4"]

Solenoid valve with NAMUR interface | monostable | air spring return | with manual override | 3/2 - 5/2 way NAMUR-flex

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 350 701	G 1/4"	1250 l/min	2...10 bar	Namur-Flex (3/2 - 5/2-way)	3 W / 5 VA	NAMUR [1/4"]

Solenoid valve with NAMUR interface | monostable | combined spring return | with manual override | 3/2 - 5/2 way NAMUR-flex

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 351 701	G 1/4"	1250 l/min	2,5...10 bar	Namur-Flex (3/2 - 5/2-way)	3 W / 5 VA	NAMUR [1/4"]

Flex-pack l converts the NAMUR-flex valve into a 3/2-way valve with exhaust-air recirculation

Type number	Interface	Material
FP 701 A	NAMUR [1/4"]	Aluminum
FP 701 KS	NAMUR [1/4"]	Polyamide

Flex-regulator l converts the NAMUR-flex valve into a 3/2-way valve and offers very precise flow regulation

Type number	Port size	Air flow	Operating pressure	Működtetés	Interface
DRF 3 601	NAMUR \| orifice 5	650 l/min	0,5...10 bar	manually	NAMUR [1/4"]

Solenoid valve with NAMUR interface | spring return to middle position | with manual override | centre closed

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 531 701	G 1/4"	1250 l/min	3...10 bar	5/3-way \| centre closed	3 W / 5 VA	NAMUR [1/4"]
MNH 531 101	G 3/8"	2250 l/min	1,5...10 bar	5/3-way \| centre closed	3 W / 5 VA	NAMUR [1/4"]
MNH 531 121	G 1/2"	3000 l/min	1...10 bar	5/3-way \| centre closed	3 W / 5 VA	NAMUR [1/2"]
MNH 531 701 NPT	G 1/4"	1250 l/min	3...10 bar	5/3-way \| centre closed	3 W / 5 VA	NAMUR [1/4"]
MNH 531 121 NPT	G 1/2"	3000 l/min	1...10 bar	5/3-way \| centre closed	3 W / 5 VA	NAMUR [1/2"]