Patent ID: 8474334
Filing Date: 2013-07-02
Classification: F16K,Y10T

Abstract:
1. A process valve, comprising: a valve seat; a flow restrictor; a valve rod; a drive, said drive moves said valve rod; a force measuring device connected between said drive and said flow restrictor, said force measuring device determining the force required to move said flow restrictor; said force measuring device includes a spring, said spring includes an S-shaped body with recesses therein, and, said S-shaped body of said spring includes a lower leg and a central leg; said force measuring device includes a travel measuring device; said travel measuring device includes a mechanical travel transmitter, said mechanical travel transmitter braced between said lower leg and said central leg of said S-shaped body of said spring, and, compression or extension of said S-shaped body of said spring deflects said mechanical travel transmitter; said travel measuring device includes a measuring point and a reference point; said travel measuring device measures change in position of said measuring point with respect to said reference point; and, said force measuring device determining said force by change in said deflection of said mechanical travel transmitter braced between said lower leg and said central leg of said S-shaped body of said spring.