Butterfly valves  (click picture to enlarge)
Herberholz shut-off valves are used to shut off or to control the flow of a wide variety of process media
in pipelines.

The sealing inserts are usually replaceable, and the valves themselves can be fitted with any type of
actuator system that you want.

All the nominal sizes are standard. Other sizes are available on request.

Technical data and dimension sheets are available for all the series listed here. They can be read or downloaded
as PDF files.
Ring shut-off valves for technical applications
Type: RAKC
Series: 037
Nominal diameter 50 - 300 
ANSI Class 125/150

Data sheet.pdf (1 MB)*
Operating instructions.pdf
(53 KB)*
Fitting specifications.pdf
(277 KB)*
For liquid and gaseous media, corrosive applications, areas subject to explosion hazard, abrasive media, clean air (TA-Luft) applications
Available in between-flange and on-flange versions
Wafer type
Type: AK
Series: 040 + 042 + 048
Nominal diameter 50 - 500 
DIN EN 593

Data sheet.pdf (664 KB)*
Operating instructions.pdf
(53 KB)*
Fitting instructions.pdf (168 KB)*
For liquid, gaseous, dusty and aggressive media.
Foodstuff industry.
Type: AK/DVGW+AK/DVGW-SSK
Series: 049
Nominal diameter 50 - 400 
DIN EN 593

Data sheet.pdf (688 KB)*
Operating instructions.pdf
(60 KB)*
Fitting instructions.pdf (168 KB)*
For all gaseous media acc. to DVGW-
Arbeitsblatt G 260.
May be used as safty shut-off valve for pipes to burner or multiple burners (closing time < 1s).
This means that in some cases it is possible to replace significantly more expensive solenoid valves
Type: AK/SSK
Series: 054
Nominal diameter 500 - 1200 


Data sheet.pdf (676 KB)*
For all gaseous media acc. to DVGW-
Arbeitsblatt G 260.
May be used as safty shut-off valve for gas pipes to burner or multiple burners.
Basis of type examination: DIN EN 161.
Wafer and lug type
Type: AK/D
Series: 072+073
Nominal diameter 25 - 700 

Data sheet.pdf (660 KB)*
For liquid and gaseous media.
max. Difference pressure 16 bar (DN25-200)
                                           10 bar (DN250-700)
Temperature range          -10 °C to +150 °C
Series 072 = between-flange valve
Series 073 = on-flange valve

* These files require the Adobe Reader