Leakage butterfly valves

Compact and cost-effective 

KIESELMANN leakage butterfly valves are the cost-effective and space-saving solution for safe product separation in process plants. They are used as reliable shut-off devices on panels and containers. In contamination-sensitive areas, you can offer extra security. A leak caused by seal wear can be detected and corrected immediately.

KIESELMANN leakage butterfly valves are generally available in intermediate flange version. This construction and the split housing allow the seals to be easily and quickly replaced.

Modular for individual solutions

Of course, you do not have to do without automation in this cost-effective leak-proof valve sector. Our modular system makes it possible to change over quickly and easily from manual to pneumatic drive without removing the valves from the piping system. The drives are available with sensors or control head KI-TOP. KIESELMANN pneumatic rotary actuators are characterised by a particularly high torque. The closed version in stainless steel housing is completely maintenance-free. We give you a 5-year guarantee. The standard position indicator lets you know at any time how the valve is switched. The practical end position detector ensures permanently reliable feedback without the hassle of readjusting the limit switches. Our pneumatically driven leakage butterfly valves can be equipped with sensors or KI-Top control heads.

• Easy to install

• Cost-effective leakage protection

• Hygienically safe due to easy cleaning of the leakage chamber

• Simple and compact design

• Maintenance-friendly construction with intermediate flange design and only one sealing element

• Fully automatable PLC or ASI bus

• Ergonomic thermal protection handle (optionally in colour of choice)

• Drives selectable, three power levels

• Sealing materials EPDM, HNBR, VMQ



  • Leakage butterfly valve 4370 K/M-G
  • Leakage butterfly valve 4870 K/M-G
  • Leakage butterfly valve 4867 G-S
  • Leakage butterfly valve 4865 without flange
  • Leakage butterfly valve 4366 S-S
  • Leakage butterfly valve 4867 S-S
  • Leakage butterfly valve 4367 S-S
  • Leakage butterfly valve 4365 without flange
  • Leakage butterfly valve 4866 S-S
  • Leakage butterfly valve 4368 G-S

Technical data


DN 50–150, 2"–4"



SIP 140 °C, 30 min
SIP 95 °C, 30 min
SIP 110 °C, 30 min

Product-contacting surfaces

Ra ≤ 0.8 µm e-polished


in product contact

1.4301 / AISI 304
1.4307 / AISI 304L
1.4404 / AISI 316L


PDA 75 / PDA 100 / PDA 125

Operating pressure

DN 50–100 / 2"–4" DN 125 DN 150

max. 10 bar max. 6 bar max. 4 bar

Control air

5.5–8 bar lower control air pressures on request

Operating temperature:

95 °C