• Double-seat valves

    Double-seat valves

    Premium class!

    Our double-seat valves are among the most modern and safest valves.

Double-seat valves

Contamination-free separation

KIESELMANN double-seat valves are the first choice to safely separate in automatic process equipment, which does not belong together.

Our double-seat valves are among the most modern, safest valves on the market. Two independently controllable valve plates with non-pressurised leakage discharge prevent incompatible media from mixing. Product rearward migrations of the valve disk seals are excluded. If a leak occurs contrary to expectations, the medium flows out through the leakage gap without pressure.

Split valve plates for maximum safety.

The easy cleaning of the leakage space is performed by lifting the upper or lowering the lower valve plate.

Everything under control thanks to comprehensive automation optionsfrom sensor monitoring via PLC or ASI-BUS control head through to emergency stop function and valve position indication. An ATEX version is even available for  gas and dust areas (Zones 1, 2 and 21, 22).

KIESELMANN double-seat valves are characterised by low operating, maintenance and repair costs.


• Leakage-free opening

• Long seal life

• Pressure shock resistant

• Optimal cleaning functions

• Optional control heads PLC, AS-Bus, emergency stop function, feedback, ATEX

• Safe product separation

• Extensive automation possibilities

• Sealing materials EPDM, HNBR, k-flex


  • Double-seat valve 5673 S-SS
  • Double-seat valve with shaft spray chamber 5671 S-SS
  • Double-seat valve 5671 with shaft flushing
  • Double-seat valve 5672 S-S
  • Double-seat valve 5674 SS-SS
  • Double-seat tank outlet valve 5629 S-S
  • Double-seat changeover valve 5674 S-S-S
  • Double-seat tank outlet valve 5629 S
  • Double-seat valve 5671 SS-S

Technical data


DN 25 -200






SIP 140°C, 30 min FDA compliant
SIP 100°C, 30 min FDA compliant
SIP 140°C, 30 min FDA compliant
100 °C max. ,
SIP 30 min
FDA compliant

Pressure shock resistant

up to 40 bar (closed valve position)


in product contact

not in product contact

1.4404 / AISI 316L

1.4301 / AISI 304
1.4307 / AISI 304L


in product contact

not in product contact

Ra ≤ 0.8 µm e-polished
Ra 1.5–2.5 µm e-polished

Operating pressure

DN 25 -100
DN 125 / 150

max. 10 bar
max. 6 bar
max. 10 bar

Control air

5.5 - 8 bar lower control air pressures on request

Operating temperature:

95 °C