Fleck Fleck2850 multiple filter valve US Fleck company has numerous professional and technical personnel to class design, quality construction management, and good after-sales service and the integrity of the service concept. Beijing Heng Yuan early transit company reached with Fleck, the main agent for China's regional Fleck control valve, multi-valve Fleck Fleck and many other products. ◆ control valve static characteristic test. ◆ tightness test. ◆ tightness test, when necessary, reinstall the stuffing box. ◆ leakage test. ◆ load full stroke time test. ◆ insulation performance test. ◆ compressive strength tests.