Plastic steel profiles refer to PVC profiles used in the production of doors and windows. They have appeared in Germany since the late 1950s. China began to be introduced in 1983 and became popular in the late 1990s. Because the doors and windows processed by PVC profiles are not strong enough, steel is usually added to the cavity to enhance the firmness of the doors and windows. Therefore, plastic doors and windows made of steel added inside the profiles are often referred to as steel doors and windows. With the extensive use of plastic steel doors and windows, the PVC profiles used to make plastic steel doors and windows are customarily called plastic steel profiles.
Metal to Metal Seat Gate Valve
BS5163 Metallic seated cast iron gate valve:DN40~DN600,PN10/PN16 Metallic seated cast iron gate valve ; BS5163 Metallic seated cast iron gate with by pass:DN350~DN600; PN10/PN16 Metallic seated cast iron gate with by pass;
BS5163 Metallic seated cast iron gate valve with bevel box:DN350~DN600;PN10/PN16 Metallic seated cast iron gate valve with bevel box;
Metal Seat Gate Valve,Metal Seat Gate Valve With Bypass,Gunmetal Seat Gate Valve With Bypass,Ductile Iron Gate Valve With Bypass
SUZHOU RSF VALVE CO.,LTD , https://www.rsf-valve.com