Abstract:
As the valve moves towards its seat the dished resilient face seats first so flow is then confined to passing through the slots in the face. As further closing movement occurs the slots are gradually seated against the backing plate to gradually cut off flow until the slots are completely blocked. The percentage of maximum flow for a given valve opening movement more closely follows the ideal.
Abstract:
The float controls the inlet valve to maintain a constant level in the float chamber. Flow from the chamber is metered by the stem which is positioned by an idler lever which follows the configuration of the cam carried by a gear segment which is rotated by pinion gear on the lower end of the manually actuated knob. The cam contour is easily controlled and will remain the same in service. The cam is spring loaded against adjusting screws positioned to permit independent adjustment of the low (pilot) and high flow rates. The adjusting screws are respectively accessible and adjustable through the knob when it is in the pilot and high flow positions.
Abstract:
Oil flows into the control valve body past the float controlled inlet valve to maintain a constant level in the body. The thin metering disc is rotatable to multiple positions in which a metering orifice underlies the float chamber outlet to accurately meter the flow. The undulating track cast in the body cooperates with the spring-loaded rollers on the bottom of the metering stem to give a detent action to registry of the metering holes. When the knob is turned to ''''off'''' the spring arm acts on the link to lift the float and force the inlet valve closed. If the oil level rises too high (due to leaking inlet valve), the inverted, Lshaped safety float flips clockwise to wedge in the valve-closing position until manually reset.
Abstract:
The pivoted main float acts on the inlet valve to regulate flow into the float chamber to maintain a constant level. The auxiliary float carried by the main float has its center of buoyancy under normal conditions located at CB1, which is to the right of the pivot for the auxiliary float and, as such, merely adds its buoyance to that main float. If the inlet valve should leak, the oil level in the chamber rises and starts to float the other arm of the auxiliary float, causing the center of buoyancy to shift to CB2, which will cause the auxiliary float to exert additional force on the inlet valve in the closing direction and will also swing the auxiliary float to a position blocking return of the float to the normal position until manually reset. The manually operated knob regulates rotation of the metering disc to control the flow rate through the outlet. The undulating surface engaged by the rollers is a detent mechanism cooperating with the metering disc and knob to index the metering disc and knob to their various operative positions.