application:Welded Ball Valve is a new type ball valve, widely used in petroleum, gas, chemical industry, pharmaceutical  industry, HVAC, district heating, etc. 

basic parameters:

          Valve Size: DN15～DN300 (NPS ½ ～ 12)

          Working Pressure: DN15 ~ 50 (NPS ½ ~ 2）   PN40

                      DN65 ~ 300 (NPS 2½ ~ 12)   PN25

Working Temperature:

                         -20˚C ~ 200˚C (Carbon Steel)

                         -40˚C ~ 220˚C (Stainless Steel)

Connection Type: Butt-weld, Flange

Operators: Lever, Worm Gear, Electric, Pneumatic, Hydraulic                              

standards:

EN 488 District heating pipes - Pre-insulated bonded pipe systems for directly buried hot water networks-Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene

EN12266-1 Industrial valves - Testing of metallic valves-Pressure tests, test procedures and acceptance criteria-Mandatory requirements

DIN17175 Seamless Tubes of Heat-resistant Steels; Technical Conditions of Delivery

EN10028-2 Flat products made of steels for pressure purposes-Non-alloy and alloy steels with specified elevated temperature properties

EN10213-4 Technical delivery conditions for steel casting for pressure purpose

EN588-1 Cement pipes for sewer sand drains-pipes, joint sand fittings for gravity systems

EN10088-3 Technical delivery conditions for semi-finished products, bars, rods and sections for general purposes

ISO 5208 Industrial valves-Pressure testing of metallic valves

ISO5211 Industrial valves-turn valve actuator attachment

ISO 5752 Metal valves for use in flanged pipe systems; Face-to-face dimensions