Pressure Relief valve Details: 1. Material: WCC,WCB, 8620 2. Processes: Sand casting 3. Testing pressure of products: 16 bars 4. Surface finish: Polishing, oiled (rust-resistant), zinc, nickel, chrome plating, hot galvanized, powder coating and painting 5. Manufacturing equipment: Electric furnace, sand mixing machine, shot blast chamber, varilus mould machine, standing machine Tool, machine tools, universal miller, standing drill machine, bench drill machine, dry sand mix miller, CNC machining center Etc quake press molding machine, turning molding machine, and hanging shot blast cabinet 6. Testing equipment: Direct-reading spectrometer hi-temperature metallographic microscope chemical analysis equipment, Supersonic inspection machine, impact testing machine, 3-D measuring machine inspection 7. This product is among our casting parts. Our annual export for only this part reaches 100,000 pieces which equals to about 400 ton of casting. 8. Our skills for producing this kind of casting are very mature, including material control, quality inspection. We provide material certificate with heat for each batch as well as inspection report. 9. Usage: it is mainly used in water pump as a part of presure reducing valve. 10. Material for this part is WCC and WCB. 11. Other casting materials are as follows: Table of casting material: Ductile iron European standard German standard EN 1563 DIN 1693 EN-GJS-350-22-LT GGG-35.3 EN-GJS-400-18-LT GGG-40.3 EN-GJS-400-15 GGG-40 EN-GJS-450-10 EN-GJS-500-7 GGG-50 EN-GJS-600-3 GGG-60 EN-GJS-700-2 GGG-70 EN-GJS-800-2 GGG-80 Compacted graphite iron Grey cast iron