... 1",1 1/4",1 1/2",2" Ball Valve:With O-rings used,good handle and sealing. ... 1)Body——Hydraulic test is carried out on the valve body according to GB/T 13927-92 standards ... universal valves,and the test result shows that the valve body meets the requirements of enclosure test.2) Bonnet ... ——Screwed connection is provided between valve cap and body,with anaerobic paste applied on the ...