HON 905 is a fine-mesh filter for gas control. It offers a large filtration area and a high degree of filtration.

HON 906 and HON 906a are cellular filters according to DIN 3386. The filters are constructed to retain impurities like dust, rust, and other solids moving within transporting lines, especially in front of pressure regulating and flow metering lines.

HON 907 is an angular cellular gas filter according to DIN 3386. It is ideal for use at distribution stations as well as power plants and industrial facilities.

HON 910a is a push-button valve with service position 'closed'.

HON 911a is a push-button gas valve with service position ‘open’.​

HON 912 is a 3-way push-button valve for safety shutoff valve (SSV) measuring lines, and for manual release function via underpressure shut-off. ​​

HON 914 is a test valve that is ideal for installation in measuring lines of safety devices

HON 915 is a vent valve that is well suited for protecting the installation room against inadmissible gas leaks from diaphragm assemblies. In case of a defect, it limits the leakage to the preset limit value (with respect to air in normal condition)

HON 916 test combination is a device for adjusting and testing safety shut-off valves (SSV) and safety relief valves (SRV).

HON 917 is a monitoring device for leakage gas flows. It is ideal for use with safety relief valves (SRV) as it can indicate opening of the relief valve and simplify the monitoring of SRV response and SRV setpoint adjustment.

HON 919 is an on/off valve that acts as a diaphragm break safety device for actuator systems K 1a, K 2a, K 2a/1, K 2a/2, K 4, K 5, K 6, K 10a, K 11a/1 and K 11a/2.

HON 925 over-pressure protection fulfils the requirements of DVGW worksheet G 491