Specific Gravity
Fisher positioner problem
Due to limits set on the controller of this valve, it is prone to repeated cycling. This ultimately manifested itself in a worn or grooved cam-roller. This caused the beam to become dislocated from it's pivot point and serious beam-misalignment ensued here. I corrected this by replacing the grooved cam roller with a new one. Direct acting 3-15 P.S.I.G. air to open valve with cam "A" installed. This is a Fisher EZ globe valve, 2"X300# flanged. Used in low pressure natural gas service to supply our hot oil furnace. (We keep our oil at 400 deg. F)
Fisher positioner problem
Due to limits set on the controller of this valve, it is prone to repeated cycling. This ultimately manifested itself in a worn or grooved cam-roller. This caused the beam to become dislocated from it's pivot point and serious beam-misalignment ensued here. I corrected this by replacing the grooved cam roller with a new one. Direct acting 3-15 P.S.I.G. air to open valve with cam "A" installed. This is a Fisher EZ globe valve, 2"X300# flanged. Used in low pressure natural gas service to supply our hot oil furnace. (We keep our oil at 400 deg. F)