Underground ball valves


  • opening and closing for district heating and cooling lines (shut-off)
  • underground installations


  • in sizes from DN 25 to DN 800
  • as full bore or reduced bore
  • with welded connections according to EN (DIN) standards
  • with various standard stem heights
  • also with customized stem heights
  • with different length extensions
  • with manual gear, electric or hydraulic actuator
  • unpainted
  • NOTE! separate air release valves (Vexve 231/I and 231/IAP/M)


  • fully welded construction
  • lightweight
  • easy to insulate
  • space saving design
  • easy to install and use
  • maintenance-free
  • long service life
  • total bi-directional tightness (EN 12266-1, leakage rate A)
  • high Kv value (minimum pressure loss, minimized pumping costs)
  • high-quality materials, suitable for many different applications

  • stainless steel or stainless material plated ball
  • trunnion mounted (sizes ≥ DN 600)
  • spring loaded PTFE ball seals
  • blow-out safe stem construction
  • stem sealing with double o-rings
  • designed and certified in accordance with EN488: 2015 and EHP003

Technical materials

Long stem ball valves, reduced bore

Long stem ball valves, full bore

Air release valves

Reference: A2A Group

Long stem ball valve features

Fully welded structure of high quality materials

  • pressure vessel steel
  • suitable for many different applications and withstands varying water quality
  • lightweight and space-saving design
  • practically maintenance-free

Easy to install and insulate

  • lightweight and simple to install
  • the entire valve is easy to insulate
  • no leakage risk
  • no condensation problems

Standard and custom stem heights

  • customer-specific stem heights according to special order