India located manufacturers of high pressure ball valve, air quick coupling, camlock coupling, non-return-needle-butterfly-globe-gate-plug-2-3-4-way-stainless-steel control valves exporters to piping system and oil tank contractors in China Asia by HIC. Hydraulic valves and pneumatic couplings more info at:http://hic-india.com/ball-check-valve-camlock-coupling-manufacturers.html .