Direct control of the Model 67 stainless steel regulator provides precise fuel pressure control in the negative 6 to 60 psi range. Large diaphragm actuators with direct control valves have low hysteresis response characteristics. High precision control is achieved through its force balancing valve with a newly developed patented smooth operation seal system. Developed specifically for the high accuracy and reliability requirements of modern engine test equipment, the M67 is suitable for all fuels such as gasoline, diesel, biodiesel (RME), aviation fuel, methanol, ethanol, gasoline mixture E5 to E100 and diesel mixture B5 to B100.