... the national patent. 2,ISO9001:2008 standard. Constant Head/ Check valve For Diesel Pump 1,IntroductionIt is a new authorized ... and running high efficiency2,Application of this constant head/check valveIt solves problems on application of pumps in the ... regulator, fuel solenoid, charger for engine start battery, actuator, speed controller, load sharing panel and so on.4, CertificateOur products ...