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manufacturer of industrial valves

Ball valve for very low temperatures (cryogenic) KM 910X.X-04

Products >> Floating ball valves >> Special

DN 10, DN 15, DN 20, DN 25, DN 32, DN 40, DN 50, DN 65, DN 80, DN 100
PN 16, PN 25, PN 40, PN 63, PN 100

KM 9108.X-04 (flanged ends), KM 9103.X-04 (butt welding ends)


Butt weld end ball valves type KM 9103.X-04 and with flanged ends type KM 9108.X-04 are isolating valves designed to fully open or close the service fluid flow. They are not designed to be used for throttling or regulating purposes. The scope of application of the ball valves depends directly on their materials and on the properties and temperature of the service fluid. The standard materials are specified in the datasheet. By agreement and based on service conditions, also other materials than those specified in the datasheet may be used.

The ball valves are designated for both corrosive and non-corrosive liquids and gases without mechanical impurities. Service temperature range can be from −196 °C to +70 °C. Allowable service pressures are in compliance with the pressure-temperature ratings (graphs B1, S1, S2, S4). For temperatures lower than −50 °C the pressure of PN is valid.

Technical description

Ball valve design meets the requirements of EN 1626 and EN 1983. The ball valve is with floating ball. The stem design ensures that the stem can not be ejected from the valve body by pressure of the fluid (anti-blow-out stem), internal components are connected to provide conductivity and resistance to formation of electrostatic discharges (anti-static design).

For liquids and gases of temperature lower than −60 °C, the ball of valve is equipped with upstream vent hole which ensures balancing of overpressure from valve cavity into upstream pipeline. In such case the valve is unidirectional and is equipped with label showing the fluid flow on the body.


  • hand lever
  • hand wheel with worm gear
  • pneumatic actuator
  • electric actuator

Dimensions of flanges for actuator installation are in accordance with ISO 5211. The actuator size depends on the maximum service pressure drop through the ball.

The method of operation is indicated by the third digit of the type designation, which is „0“ for lever and „3“ for actuator (e.g. KM 9133(8).X-04).

Connection to piping

Overall dimensions are shown in the datasheet. Dimensions according to standards:

  • connection according to EN 1092–1
  • face-to-face dimensions of flanged valves acc. to EN 558–1 – series 1 (corresponding to DIN 3202 series F1)
  • dimension of ball bore according to EN 1983
  • shapes of welding ends according to EN ISO 17292
  • end-to-end dimensions of valves with welding ends according to ČSN EN 12982


According to EN 12 266–1 as a standard, i.e. shell strength test P10, P11, seat tightness test P12 (water pressure 1,1×PN and air pressure 0,6 MPa), leakage rate A – zero leakage. If required by the Customer, additional tests may be performed as well.

Installation, service and maintenance

The ball valves are intended for horizontal pipelines. The stem must point upwards and its upper third must not be insulated. They require no special adjustments or maintenance. They are operable at the full pressure drop which equals to PN.

Optional accessories, adjustments and services

  • fire-safe design – fire resistance in accordance with EN ISO 10497 (API 607)
  • lockable handle with a padlock – for locking opened / closed position of the valve
  • limit switches
  • documentation according to EN 10204 3.1 or 3.2
  • special adjustments according to customer requests
  • execution according to standard NACE MR 0175 or ISO 15156
  • special execution of valve for liquid oxygen

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