Stainless Steel Valves - Valves with NAMUR-interface | Hafner - Hafner

Stainless Steel Valves - Valves with NAMUR-interface | Hafner

Name: Stainless Steel NAMUR Valves for Process Automation | Hafner
Brand: Hafner
SKU: Stainless Steel Valves - Valves with NAMUR-interface | Hafner

Hafner Stainless Steel NAMUR Solenoid Valves

Hafner MNH INOX NAMUR-mounted solenoid valves are designed for direct installation on pneumatic rotary actuators in process valve automation. The stainless steel body and NAMUR 1/4” interface minimize external pilot air tubing between valve and actuator, supporting compact and robust assembly in industrial environments.

Operating Versions

3/2 NC: For single-acting actuators with spring return. Models MNH 310 / 311, G 1/4” or NPT 1/4”, flow rate 1250 l/min, pressure range 2–10 bar or 2.5–10 bar.
5/2 Single Solenoid: For double-acting actuators with air or combined return. Models MNH 510 / 511, 1250 l/min.
5/2 Double Solenoid: MNH 520, two coils, last-position memory until new electrical command.
NAMUR-Flex 3/2–5/2: MNH 350 / 351, convertible operation to match actuator type and fail-safe logic.

Technical Data

Standard coil consumption: 3 W DC / 5 VA AC. 701 series available in VES and KES variants, with NAMUR [1/4”] interface and manual override. MNH 310 701 KES is specified for compressed air, temperature range -10…+50 °C, switching time 50 ms at 6 bar and +20 °C, stainless steel body.

NAMUR Accessories

Stainless steel accessories for exhaust regulation and recirculation:

FP 701 VES: Flex-pack for converting NAMUR-Flex to 3/2 with exhaust-air recirculation.
DRN 3 / DRN 5: NAMUR flow regulators for 3-way or 5-way configurations.
DRF 3: Flex-regulator for flow adjustment and 3/2 conversion.
UB 701 VES: Air recirculation block, G 1/4”, 1250 l/min, 1–10 bar.

Selection in Process Applications

Selection is based on actuator type, de-energized fail position, 3/2 or 5/2 requirement, available instrument air pressure, G or NPT connection, and need for speed regulation. Periodic inspection should include NAMUR O-rings, exhaust leakage, correct coil voltage, and instrument air cleanliness.

Datasheet and documents

Description

3/2-way valves

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 310 701 VES	G 1/4"	1250 l/min	2...10 bar	single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]
MNH 310 701 NPT VES	NPT 1/4"	1250 l/min	2...10 bar	single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]

Type number	Port size	Air flow	Operating pressure	Funktion	Power consumption	Interface
MNH 310 701 KES	G 1/4"	1250 l/min	2...10 bar	single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]
MNH 310 701 NPT KES	NPT 1/4"	1250 l/min	2...10 bar	single solenoid \| NC	3 W / 5 VA	NAMUR [1/4"]

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

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

5/2-way valves

stainless steel solenoid valve with NAMUR interface | monostable | air spring return | with manual override | INOX

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

stainless steel solenoid valve with NAMUR interface | monostable | air spring return | with manual override | INOX

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

stainless steel solenoid valve with NAMUR interface | monostable | combined spring return | with manual override | INOX

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

stainless steel solenoid valve with NAMUR interface | monostable | combined spring return | with manual override | INOX

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

stainless steel solenoid valve with NAMUR interface | bistable | with manual override | INOX

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

stainless steel solenoid valve with NAMUR interface | bistable | with manual override | INOX

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

NAMUR-Flex | 3/2 - 5/2 Ventile

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

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

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

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

Stainless steel Flex-pack | converts the NAMUR-flex valve into a 3/2-way valve with exhaust-air recirculation | INOX

Type number	Interface	Material
FP 701 VES	NAMUR [1/4"]	Edelstahl

Stainless steel Flow regulator with NAMUR interface | for 3-way NAMUR valves | precise regulation | INOX

Type number	Port size	Air flow	Operating pressure	Működtetés	Interface
DRN 3 611 VES	NAMUR \| orifice 5	650 l/min	0,5...10 bar	screw-driver	NAMUR [G 1/4"]

Stainless steel Flow regulator with NAMUR interface | for 5-way NAMUR valves | precise regulation | INOX

Type number	Port size	Air flow	Operating pressure	Működtetés	Interface
DRN 5 611 VES	NAMUR \| orifice 5	650 l/min	0,5...10 bar	screw-driver	NAMUR [G 1/4"]

Stainless steel flex-regulator | converts the NAMUR-flex valve into a 3/2-way valve and offers very precise flow regulation | INOX

Type number	Port size	Air flow	Operating pressure	Működtetés	Interface
DRF 3 611 VES	NAMUR \| orifice 5	650 l/min	0,5...10 bar	screw-driver	NAMUR [1/4"]

UB 701 VES Stainless steel air-recirculation block with NAMUR interface | INOX

Type number	Port size	Air flow	Operating pressure	Interface
UB 701 VES	G 1/4"	1250 l/min	1...10 bar	NAMUR [1/4"]