Fine S.G. discrimination
Specially designed displacer senses a specific gravity difference of even 0.05.
Nozzle, flapper and relay
Interface Level Controller
The controller detects the difference in buoyancy between two liquids. It is built to hold the boundary between the two layers rather than simply detect liquid versus vapour.
- Senses S.G. difference
- from 0.05
- Max. working pressure
- 60 kg/cm²
- Temperature
- 150 °C
- Air consumption
- 15 – 35 CFH
Overview
Control the boundary between two liquids
The controller detects the difference in buoyancy between two liquids. It is built to hold the boundary between the two layers rather than simply detect liquid versus vapour.
Like most level instruments it works on the buoyancy principle. A booster relay placed to control the speed and response time helps to remove the heavier liquid at a fast speed. The relay is enclosed in a pressure-tight housing that allows remote release of vented gases and protects the pilot and pressure gauges from field disturbances and during cleaning.
The displacer is specially designed to sense a specific gravity difference of even 0.05.
Booster relay
Controls speed and response time, helping to remove the heavier liquid quickly.
Self-clearing orifice
A cleaning device is provided to clear a clogged orifice without dismantling the instrument.
Direct or reverse
Operates pneumatically in direct as well as reverse direction; reverse is obtained by rotating the nozzle assembly through 180°.
Specifications
Standard model; higher operating pressure on request
| Connection | 4" NB CS, ASTM A105 flange as standard in 150#, 300#, 600# |
|---|---|
| Enclosure | Die-cast aluminium, weatherproof to IP 65 |
| Displacer options | Vertical (stainless steel) 76 mm OD x 355 mm length · Vertical (PP) 90 mm OD x 115 mm length · Horizontal (stainless steel) 76 mm OD x 440 mm length |
| Differential | Vertical (PP float): 20 ± 5 mm for S.G. difference of 0.1 · Horizontal (SS float): 7 ± 3 mm for S.G. difference of 0.1 · 20 mm depending on size of displacer and S.G. (vertical float) |
| Inlet and outlet connection | 1/4" NPT |
| Exhaust | Screwed vent connection |
| Max working pressure | 60 Bar / 60 kg/cm² |
| Temperature | 150 °C with stainless steel float and 100 °C with phenolic float |
| Operating pressure | 1.4 kg/cm², 3 kg/cm², higher on request |
| Mode of operation | Pneumatic, on-off direct or reverse |
| Consumption of air | 15 CFH (min) to 35 CFH |
We need both liquid details
Share the specific gravity of both liquids, interface range, pressure, temperature and valve requirement. We will confirm the controller setting and arrangement.
- Fluid, specific gravity and concentration
- Flow or level range, and line size
- Operating pressure and temperature
- Material of construction and end connection
- Output, display and area classification