Installation position, height, inlet and outlet direction must meet the design requirements, and the connection should be firm and tight. All types of manual valves installed on insulated pipelines must not have handles facing downwards. Before installing the valve, visual inspection must be carried out, and the valve nameplate should comply with the current national standard "General Valve Marking" GB 12220. For valves with a working pressure greater than 1.0 MPa and serving as shut-off valves on main pipelines, strength and tightness tests should be conducted before installation, and they can only be used after passing the tests. During the strength test, the test pressure is 1.5 times the nominal pressure, with a duration of not less than 5 minutes, and the valve body and packing should have no leakage to pass. During the tightness test, the test pressure is 1.1 times the nominal pressure; the test pressure and duration should meet the requirements of GB 50243, with no leakage on the valve disc sealing surface to pass. A sealing gasket should be installed between the valve flange and the pipeline flange according to the pipeline design requirements. Ball valves with transmission mechanisms should be installed according to the product instruction manual.
pvc Polyvinyl Chloride temperature -10°C-55°C
PP Polypropylene temperature -20°C~90°C
UPVC Unplasticized Polyvinyl Chloride temperature -10°C~70°C
CPVC Chlorinated Polyvinyl Chloride temperature -40°C~95°C
PVDF Polyvinylidene Fluoride temperature 40°C~140°C
Shanghai Huanqi Plastic Pipe Co., Ltd.
Name: Li Yaoqing
Company Phone: 021-57562878
Company Fax: 021-57562676
Mobile: 15900400720
Email: twhq29@163.com
Company Website: http://www.hqpvc.com
http://www.hqpvc.com/aboutus.asp?id=23
http://www.hqpvc.com/news.asp?bigclassname=Company News
http://www.hqpvc.com/product.asp
http://www.hqpvc.com/news.asp?bigclassname=Product Knowledge
http://www.hqpvc.com/news.asp?bigclassname=Company Cases
http://www.hqpvc.com/aboutus.asp?id=24