... quality 3.Competitive price 4.Good quality seals Pressure Relief valve Details: 1. Material: WCC,WCB, 8620 2. Processes: Sand casting ... bars 4. Surface finish: Polishing, oiled (rust-resistant), zinc, nickel, chrome plating, hot galvanized, powder coating and painting 5. Manufacturing equipment ... used in water pump as a part of presure reducing valve. 10. Material for this part is WCC and WCB. 11 ...