Causes 1. cast iron casting quality is not high, the valve body and the valve body with trachoma, loose tissue, slag and other defects 2. Day cold cracking; 3. Poor welding, there is slag, welding, stress cracking, etc. Defects 4. Cast iron valve is hit by heavy objects damage prevention and solutions 1. To improve the casting quality, strictly in accordance with the provisions of the pre-installation strength test; 2. For the temperature of 0 ° and 0 ° below the valve, insulation or heat should be mixed , Stop the use of the valve should be ruled out stagnant water 3. The weld consisting of the valve body and the valve cover should be carried out according to the relevant welding procedures, testing and strength testing should be carried out after welding; 4. Do not push the valve on the weight Material, does not allow the use of hand hammer impact on cast iron and non-metallic valves, large-diameter valve installation bracket. More Keywords Search: Valve
Gold Metallized Thermal Lamination Film
Gold Metallized Thermal Lamination Film is made by Gold Metallized BOPP Film and EVA, it's metallized Bi-axially Oriented Polypropylene film with EVA coated. BOPP Thermal Laminated Film is used by extrusion coating process to combine the two layers. In the final film, one side has BOPP properties and the other side becomes heat sensitive surface used for dry laminator. Single side is corona treatment. The Metallised Thermal Lamination Film is widely used and plays an important part in packaging industries.
Gold Metallized Thermal Lamination Film,Gold Metallized Thermal Lamination Film And Paper,BOPP Film For Thermal Laminating,BOPP Film For Thermal Lamination
GR (SHANDONG) NEW MATERIAL CO., LTD , https://www.grmaterial-film.com