41. Most control valve systems in the past were implemented using mechanical systems or solid state electronics. 42. The control valve is one of the most expensive and sensitive parts of a hydraulic circuit. 43. They are also used to transmit controller outputs to the modulating field devices such as control valves . 44. Unfortunately, traditional control valves make it inevitable. 45. The way to solve both these problems is to install a temperature control valve in the shower. 46. "The Tokico shocks contain built-in low-velocity control valves that help reduce body roll, " the company says. 47. Mechanical snap action thermostat valves are the integration of the control mechanism with the flow control valve . 48. An example is pneumatic rack and pinion actuators that can be used to control valves in pipeline transport. 49. Cavitation can occur in control valves . 50. This depends on the piston size, the pressure reduction downstream and the flows through the two control valves .
