... Identification: ISO9002 / QS9000 3.Brand or OEM packing Engine valves Valve role is responsible for input to the engine fuel and ... well at high temperature and corrosive environment. INLET VALVE IS SUH3(4Cr9Si2) ; EXHAUST VALVE IS SUH35(21-4N), normal material: INLET ... ,VOLVO,VOLKSWAGEN AND SO ON. We have all kinds of valve techniques, entire material valves, double mttal friction welding , small ...