Series 701

Series 101

Series 121

NAMUR-Flex

The NAMUR-flex is designed for a maximum of flexibility. The valve itself can be used as a 5/2-way type on double acting actuators.

By adding the flex-plate it is converted into a 3/2-way valve for single acting actuators.

Quick-exhaust blocks

The quick-exhaust block with NAMUR interface allows big spring-return actuators to close at high speed.

It offers a maximum exhaust volume of 2,500 Nl/min.

An integrated non-return valve ensures that no ambient atmosphere can be sucked into the actuator while exhausting.

Short-cut valve

In the case of automated process valves which are equipped with a manual gear box, it has to be ensured that no air is trapped inside the actuator in case of manual operation.


The HAFNER short-cut valve connects both actuator chambers with each other so that the air can flow from one chamber into the other. The user doesn’t have to close the process valve against any air pressure.

NAMUR flow regulator plates

Block form flow regulator as intermediate plate to be assembled between actuator and pilot-valve.

Advantages:

Also available with the 1/2“ NAMUR interface!

The Hafner NAMUR air-recirculation block guarantees that only exhausting air from the actuation side - and certainly no potentially aggressive ambient atmosphere
- goes into the spring chamber.

Especially used for protecting the springs inside the actuator when remotely piloted (e.g. with a valve which is assembled in a control cabinet).

Valve is designed for spring-return pneumatic actuators with a 1/4” Namur interface. G1/4” pilot port.

The BHN 611 01 is designed to lock the air inside an actuator. It is typically used for process valves on tanks where maintenance personnel have to go into the tank to clean it.

Another usage is for repair work in pipelines.

The valve is lockable in manual mode (M position) and protected with a pin against unintended use in standard operation mode (O position).

The BHN 601 and BHN 601 01 are designed to manually exhaust an actuator. These valves are typically used to avoid injury
to maintenance personnel when working on installed process equipment.

BHN 601 01 exhausts actuator when knob is pushed. Lockable in manual mode (M position) and protected with a pin against unintended
use in the standard operation mode (O position).

BHN 601 exhausts actuator when knob is pulled. Lockable in standard operation mode (O position).

The MNEH 411 701 is made for blocking the air supply from the pilot valve to the actuator and holding it in the current position.
It offers a so-called stay-put or fail-in-place function.

As long as an electric signal is applied to the solenoid as well as air pressure is applied to the external pilot port,
the valve forwards the signals from the pilot valve to the actuators. If the electric signal or air pressure at the external pilot port cuts off, the actuator is blocked.

The MNEH 611 611 is made for blocking the air supply from the pilot valve to the actuator and exhausting the actuator.

As long as an electric signal is applied to the solenoid as well as air pressure is applied to the external pilot port,
the valve forwards the signals from the pilot valve to the actuators.
If the electric signal or air pressure at the external pilot port cuts off, the actuator is exhausted.

The DSVN-5 is designed to hold a double acting actuator in the current position if the pressure supply cuts off.
The valve is comprised of two non-return valves, which are unlocked by pressurising port P1 or P2.

In the case of automated process valves which are equipped with a manual gear box, it has to be ensured that no air is trapped inside the actuator in case of manual operation.
The HAFNER short-cut valve connects both actuator chambers with each other so that the air can flow from one chamber into the other.
The user doesn’t have to close the process valve against any air pressure.