Floating Decanters FHP Series

FLOATING DECANTERS FHP SERIES is a floating decanter designed for discharging supernatant liquid in SBR. It consists of a submersible pump, sludge sensor, and a float.

The sludge sensor is a monitoring device that prevents unexpected inflow of sludge or other sediment and helps the pump solely discharge supernatant liquid. When the pump is not in operation, a check ball incorporated in the intake closes the suction opening by buoyancy, thus preventing the inflow of floating sludge into the suction casing.

Photosensor prevents sludge inflow, helps discharge only supernatant liquid. Ideal for use under unstable water levels.

Features

The sludge surface monitoring device prevents unexpected inflow of sludge and helps the pump solely discharge supernatant liquid.
A float makes the pump particularly useful for the application where the water level fluctuates widely.
An incorporated control circuit automatically stops operation upon receiving warning signals from the photosensor which would detect a water level drop to near the sludge interface layer.
The sensor surfaces are automatically washed with pressurized water to be kept clean for perfect monitoring.

Applications

Discharging supernatant liquid in SBR
Discharging supernatant liquid at a facility where such process is required

Model Selection 50/60Hz

Discharge Bore mm	Model	Motor Output kW	Phase	Speed (S.S.) min-1	Starting Method	Dry Weight *kg	Cable Length m
40	FHP3-3	0.25	Single	3000/3600	Capacitor Start	29	6
40	FHP3-3T	0.25	Three	3000/3600	D.O.L.	27	6
50	FHP2-4	0.4	Single	3000/3600	Capacitor Start	29	6
50	FHP2-4T	0.4	Three	3000/3600	D.O.L.	27	6
50	FHP4-8T	0.75	Three	3000/3600	D.O.L.	28	6
80	FHP2-15T	1.5	Three	3000/3600	D.O.L.	60	6

Major Components & Specifications

Major Components & Specifications
Discharge Bore mm			40	50	80
Pumping Fluid	Type of Fluid		Treated Water
Pumping Fluid	Fluid Temperature		0 to 40˚C
Pump	Structure	Impeller	Channel
		Shaft Seal	Double Mechanical Seal
		Bearing	Double-shielded Ball Bearing
	Materials	Impeller	Gray Cast Iron
		Casing	Gray Cast Iron
		Shaft seal	Silicon Carbide
		Float	FRP
Motor	Type, Pole		Dry Type Submersible Induction Motor, 2-pole
	Insulation		Class E
	Insulation		Class F (1.5kW only)
	Phase		Single-phase
	Phase		Three-phase (suffix "T")
	Starting Method		Capacitor Start (Single-phase only) Direct on Line
	Protection Device (built-in)		Circle Thermal Protector
	Lubricant		Turbine Oil (ISO VG32)
	Materials	Frame	Gray Cast Iron
		Shaft	420 Stainless Steel
		Cable	PVC
Discharge Connection			Hose Coupling

Performance Curves

Dimensions

Standard Accessories

Hose Coupling
Anti-sludge Sensor Cable 6m
Lifting Chain 3m* (with Shackles)
*5m for 1.5kW

Structural Features

1.Float
The float sustains a submersible pump by buoyancy at an appropriate position.
Made of fiber reinforced plastic (FRP), the float is filled with polystyrene foam which prevents the loss of buoyancy in case the float is broken.

2.Intake Check Ball
A check ball incorporated in the intake closes the suction mouth by buoyancy when the pump stops operating thus preventing the inflow of floating sludge.
During operation, the ball is sucked in by the pump’s suction power to take in supernatant liquid.

3.Pumping Section
Each component, such as dual inside mechanical seal, motor protector, and anti-wicking cable entry, represents Tsurumi’s outstanding expertise.

4.Amplifier Unit Box

5.Anti-sludge Sensor
When the amount of light transmitted from an emitter via glass fibers is reduced by a certain density of sludge existing in the liquid, the sensor identifies the light amount and sends corresponding signals to the control panel to stop or operate the pump not to suck up sludge.

6.Sensor Cleaner
The sensor cleaner spouts a jet of clean water from its nozzle to wash the light emitter and receiver at fixed intervals. The pressurized water can be treated water coming from a submersible pump installed in the spray pump tank.

Recommendation;

The washing shall be performed for 5 minutes every 1.5 hours during the aeration process.
The amount of washing water shall be regulated with a valve over a range of 10 to 20 L/min and the pressure, 0.5 to 1 kg/cm2.