Stop Valves with Bellows Seals

Manufacturer: ARI | KSB | etc.

Stop valves with bellows seals PN 16/525 DN 15-350 - maintenance free - metallic or soft sealing for medias such as steam, gases, hot water, thermal oil, process water, vacuum facilities, ammonia etc. for safety and trouble-free operation of all known German and European manufacturers in industrial applications and chemical industrie.

  • V-port plug (seat-guided throttling plug for maximum requirements) for DN 15-300
  • Valve disc with PTFE ring (max. 200 °C, throttling plug for DN 15-100, on/off disc for DN 125-200)
  • Lead-sealable cap (prevents unauthorised actuation) as assembly set
  • Balanced plug design from DN 200
  • High-temperature resistant paint (grey aluminium)
  • Either one or two limit switch(es) as assembly kit for globe valves of DN 15-150 made of JS1025
  • Oil and grease-free: lubricated exclusively by mineral oil free lubricants approved by the German Federal Office for Materials Testing (Bundesanstalt für Materialforschung und -prüfung, BAM)
  • Other flange designs
  • Low-temperature steel bolts for temperatures down to -30 °C (JS 1025 only) up to 0.75 x PN (max.)
  • Certification to customer specification
  • Globe valve version with gland packing and electric actuator see BOA-H Mat E
  • Straight-way or angle pattern with horizontal seat
  • Throttling plug up to DN 100
  • On/off disc for DN 125 and above
  • All nominal sizes with position indicator, locking device and travel stop
  • Compact bonnet
  • Maintenance-free bellows-type stem seal with back-up gland packing
  • Non-rising handwheel
  • Flanges to DIN EN 1092-2 Type 21
  • Exterior coating: blue RAL 5002
  • The valves do not have a potential internal source of ignition and can be used in potentially explosive atmospheres


  JL 1040 JS 1025
Nominal pressure PN 16 PN 16/25
Nominal size  DN 15-300 DN 15-350
Max. permissible pressure 16 bar 25 bar
Max. permissible temperature 300 °C 350 °C
  • High operating comfort at no extra charge due to position indicator with travel stop and locking device outside the insulation. Valve disc position can be checked at any time
  • Optimum start-up and throttling due to standard throttling plug up to DN 100 (seat-guided V-port plug optionally available for all valve sizes to meet maximum throttling requirements)
  • When the valve is fully open, the bellows is confined within the valve body, protected from pressure surges
  • Little heat loss during operation due to short and smooth bonnet suitable for easy and cheap insulation
  • Added protection against fatigue fracture: The bellows is welded to the stem, so no vibrations are transmitted from the valve disc to the bellows.
  • Back-up gland packing provides additional safety in case of defective bellows
  • Position indicator with colour coding system for identification of valve design during replacement work. The disc type and seat/disc interface material can be verified without removing the insulation
  • Space-saving non-rising handwheel
  • Processing technology
  • Powerstations
  • Air-conditioning systems
  • Boiler feed applications
  • Boiler recirculation
  • Hot water heating systems
  • High-temperature hot water heating systems
  • Heat transfer systems
  • General steam applications in industry
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