... WCB, WCC 2) Uage: as part of valve, used in agriculture 3) Process: casting and machining Pressure Safety Valve Details:1 ... Processes: Sand casting 3. Testing pressure of products: 16 bars 4. Surface finish: Polishing, oiled (rust-resistant), zinc, nickel, ... ISO9001-2000, ISO9001-2008 Quality Assurance System, the USA UL.4. Products covering hydraulic cylinders, pistons, flanges, valves parts, casting ...