SIMO POWER WITH PETROL ENGINE AND DOUBLE HOSE REEL The P 635 SG DHR 20 has a petrol engine. The simultaneous operation of two devices (Simo-Power) is possible with it. Due to the higher oil volume and the associated higher flow rate, more power is also available. The hose reel module can be retrofitted and quick and safe coupling is possible thanks to monocoupling technology. The P 635 SG DHR 20 is equipped with a 20 m double hose reel (DHR20).