A surge drum for recovered propane being built-in.

Adoption of self-coupling through which the propane remained in the space between a coupling connected to unloading hose and loading arm to be perfectly recovered when they are taken off after unloading is over.

Carrying a hose for recovery so that the LPG accumulated in a liquid trap of the gas compressor can be recovered without discharge outside.

Increase in unloading rate by over 15 %, namely shortening of unloading time, by using a unloading pump and a gas compressor at the same time.
For this purpose, the hose real with lager diameter is adopted.

Direct drive system by mission-side PTO for unloading pump, while direct drive system by fly wheel PTO for gas compressor.
It means that the driving efficiency is 100 % in both systems.

Use of recovery unit for recovery of residual propane in a storage tank,etc.