It is operated by the pilot and does not require auxiliary power such as from compressed air or electricity. Compared to the direct impingement type, it has a larger capacity. The range of pressure adjustment is wide and adjustments can be made easily. With the built-in "pressure relief valve filter" with a practical design patent No.13137, errors caused by the scale or impurities inside the pipes are prevented. Compatible with disks/ sheets. Leakage: Less than 0.05% of the standard flow