... : ISO9002 / QS9000 3.Brand or OEM packing Engine valves Valve role is responsible for input to the engine fuel and ... ,SUZUKI,VOLVO,VOLKSWAGEN AND SO ON. We have all kinds of valve techniques, entire material valves, double mttal friction welding , small ... , small soldering alloy, shaft chromium-plating , surfacing nitration treatment.Of course , we can produce engine valves according to your samples ...