| 1. EXCELLENT ULTIMATE VACUUMEmploying new material (high quality continuously drawn cast iron bar) completely eliminated the imperfection in vacuum pressure caused by casting defect or blowhole in the cast material. So it is possible to obtain high vacuum and large throughput.2. IMPROVED ANTI-SUCKBACK VALVE SYSTEMThe function of the oil anti-suckback valve designed specially for TRP series is to protect vacuum system perfectly from oil and oil mist in the vacuum pump back streaming to the system when the pump happens to be stopped unintentionally or when restating the pump.3. CONSTANT PRESSURE OIL CIRCULATING SYSTEMTRP series is equipped with gear rotor oil pump producing high pressure which ensures perfect oil circulation. This system ensures to prevent friction parts free from wearing and jamming due to poor oil supply and enables to operate pumps in low vacuum operation continuously4. CONVENIENT GAS BALLAST VALVE CONTROLGas ballast valve control has three steps(C : closed, ? : low flow, ? ; high flow) for easy choice even a pump is in operation. The gas ballast valve means the self cleaning ability of the pump and removing condensable gases from oil by supplying fresh gas to the 2nd cylinder of the pump to prevent mist being condensed.5. REDUCED PARTS REQUIREMENTSTRP series pumps were designed in 4 major product series such as (1) TRP-6, TRP-12 (2) TRP-24, TRP-36 (3) TRP-48, (4) TRP-60, TRP-90. Through this system many parts in the same series can be commonly used. For example pumps in the same series use same pump housing. This design principle enables more economical production, simplifying spare parts stocks and good compatibility of parts. | 
