Internal Ball Float Level Controller

Introduction:

Internal ball float level controller has been designed and developed especially for various types of liquid level control service used in refineries gasoline, plant, industrial plants oil & gas separators and other similar installations, this unit is installed directly to the flange opening on the side of the vacuum towers, soaking drum, oil & gas separators fractionating column, all type of liquid containers where a float operating inside of the tower can be used to a level container are not recommended where turbulence or foaming on the liquid surface occurs. For such installation, the external float cage type level controller is recommended.

Principle of Operation:

The operation of level controller is based on the principle that ball float is determined by the fluid level variations actuating the rod through a system of levers. The controller operates on Archimedes principle. The increase in level causes float to move up which is helped by counterweight for upward movement. The linkage operates plunger of pneumatic relay for changing output pressure which finally operates control valve to control level of liquid. The maximum angle of the plug turn is 50° and corresponds to the level change within the range of 300mm. the pneumatic relay is supplied with purified natural gas or air at a pressure of 1.1 to 2.5kg/cm².

Specifications:

Service: Crude oil (oil/gas interface) Specific Gravity: 0.7 Operating Pressure: Upto40kg/cm2 Operating Temperature: 120°C Float: SS304 Mounting: Side Internal Flange details: A) 8"x150# ASA (B) 10"x150# ASA (C) 2" BSP thread2 Flange Material: Carbon Steel Supply: 1.1 to 2.5kg/cm2 (clean, dry & oil free air or gas) Output: ON/OFF (proportional) Action: Direct (increase in level increases output) Reverse (increase in level decreases output) Float traveler: Provided Float steam: 606mm std. (other on request) Packing: Teflon Pneumatic connection: 3" NPT