Automatic refill units

SPN Automatic SPN Automatic The SPN is an automatic refill unit for barrier fluid pressurization in seal circuits. Pressurization by pneumatic or electric power, or a combination of both. The refill unit tank is designed for pressureless operation and is equipped with a level switch and a sight-glass. The refill unit has all pipework as far as the distributor unit. Separate components are installed in the seal circuit to cool and to circulate the barrier medium.