Check Valve factory Product Description Price: The price is changing because of material cost and exchange rate. Please give me your contact information, I will update the newest price to you * Nominal size: 4"-180", DN100-4500 * Pressure rate: Class 600LB-2500LB,PN100-PN420 * Pressure grade:1.0-4.0MPa * Connection Type: Flanged ends * Material: WCB, WCC, WC6, WC9, LCC, LCB, CF8, CF8M,...