31. Other ways include adding a solenoid valve in conjunction with a hose or cable reel that diverts oil flow from an existing function. 32. Sullivan Supply Co . in Erie won a $ 26, 235 contract from the Defense Supply Center in Columbus, Ohio, for solenoid valves . 33. By varying the pulse width to the solenoid, the solenoid valve can be commanded to be open a certain percentage of the time. 34. The solenoid valve is electronically activated to shift the air flow either through the scrubber or to bypass it on a timed sequence. 35. In 1990 the Company diversified in pump manufacturing in 1990 when it bought " Italian piston actuated and solenoid valve business in 2001. 36. The engine control unit ( ECU ) allows vacuum into the actuator by powering a solenoid valve when the engine rotation speed is low. 37. However, the operation of the Ion is somewhat simpler than a Shocker SFT or Matrix in that it does not use a 4-way solenoid valve . 38. Flow is usually controlled by a steam trap or a solenoid valve, but bleed holes are sometimes used, often in conjunction with a solenoid valve . 39. Flow is usually controlled by a steam trap or a solenoid valve , but bleed holes are sometimes used, often in conjunction with a solenoid valve. 40. The solenoid valve is electrically supplied from + 54 via fuse 13 and is controlled by the ECU via its pin 26 and pin 2.