# T29 - Pig loading and unloading station
With this station pigs can be safely be removed from or loaded into the system. On the loading/unloading side it is equipped with I.S.T. sliding couplings (male and female part) which faciliates a quick and safe unloading. After opening, the pig can easily be removed from the oversize section of the station. In order to avoid an unauthorised opening of the station it can be locked mechanically or pneumatically. The pipeline side can be equipped either with a flange or a female sliding coupling. Due to safety reasons I.S.T. recommends the use of this station.
## Technical Characteristics
Nominal inside diameters   DN 25 - DN 350 (1" - 14")     Connections   Flanges and/or slipping clutches     Pressure   up to PN 16, 150 lb.     Temperature   up to + 90°C, higher temperatures on request     Material   Cast steel or cast stainless steel body     Seal   NBR, FKM (others on request)     Pneumatic cylinder   for 6 bar of instrument air     Optional extras   Pig sensor, pig locator