... : 1. swing check valve nominal prssure: 1.6 MPa 2. swing check valve forged by punch Brass swing check valve:Material (valve body): CopperTechnical: Forged ... : Water, Oil , Gas,etc.Size: 1/2", 3/4", 1", 1 1/2", 1 3/4", 2", 2 1/2", 3", 4" Guarantee: 3 yearsSatndard ...