Submersible Self-aspirating Jet Aerators BER Serise

SUBMERSIBLE SELF-ASPIRATING JET AERATORS BER SERISE is a combination of a customized B-series pump and a venturi-jet based diffuser. They draw in air from above water’s surface by generating negative pressure around the nozzle with the flow from the pump. The air is mixed into the wastewater by this jet injector mechanism and sprayed underwater by the diffuser, to aerate and agitate the wastewater at the same time. In the process, tiny bubbles form inside the diffuser and increase the amount of dissolved oxygen in the wastewater. The mixed air-water is ejected powerfully in one direction, which effectively agitates the water across a wide area.

SUBMERSIBLE SELF-ASPIRATING JET AERATORS BER SERISE is available not only as a free-standing model but also as a guide rail model, so that maintenance and inspection can be performed without entering the sump.

FEATURES & APPLICATIONS

FEATURES

Simple structure consisting of a submersible pump and venturi-jet based diffuser. Can aerate and agitate wastewater without requiring a blower. (Capable of anaerobic agitation.)
Powerfully ejects a mixed flow of air and water in one direction.
Obtains a high level of dissolved oxygen because tiny bubbles slowly rise as the air and water mix.

APPLICATIONS

Pre-aeration and mixing at wastewater treatment plant
Oxygen supply at aquariums and fish farms
(Requires lubricant change to liquid paraffin.)

Model		Air-inlet Bore mm	Motor Output kW	Phase	Starting Method	Solids Passage mm	Max. Water Depth ^*2 50 / 60Hz m	Dimensions L x H mm		Dry Weight^*3 kg		Cable Length m
Free Standing	Guide Rail Fitting	Air-inlet Bore mm	Motor Output kW	Phase	Starting Method	Solids Passage mm	Max. Water Depth ^*2 50 / 60Hz m	Free Standing	Guide Rail Fitting	Free Standing	Guide Rail Fitting	Cable Length m
8-BER	TOS-8BER	25	0.75	Three	D. O. L.	20	4 / 3.5	674 x 464	674 x 514	28	23	6
15-BER	TOS-15BER	32	1.5	Three	D. O. L.	20	4	895 x 562	910 x 603	43	34	6
22-BER	TOS-22BER	50	2.2	Three	D. O. L.	35	4.5	1158 x 705	1162 x 793	75	73	6
37-BER	TOS-37BER	50	3.7	Three	D. O. L.	35	5	1163 x 779	1167 x 862	91	87	6
55-BER	TOS-55BER	50	5.5	Three	D. O. L.	35	6	1415 x 942	1422 x 1006	142	126	8

CONVECTION PATTERN

RECOMMENDED TANK DIMENSIONS

Model	Motor Output kW	Max.Water Depth 50/60Hz m	Max. Tank Dimensions 50/60Hz
Model	Motor Output kW	Max.Water Depth 50/60Hz m	Length m	Width m	Depth m
8-BER	0.75	4 / 3.5	3	2	4 / 3.5
15-BER	1.5	4	4	3.5	4
22-BER	2.2	4.5	5	4.5	4.5
37-BER	3.7	5	6	5	5
55-BER	5.5	6	7	7	6

MODEL NUMBER DESIGNATION

		BER
		8-BER	15-BER	22-BER	37-BER	55-BER
PUMP	Air-inlet Bore mm	25	32	50
	Air-inlet Connection	Threaded Oval Flange
	Diffuser	Structure Steel + Nylon Coated
	Solids Passage mm	20		35
	Impeller	Channel
	Impeller	Gray Cast Iron
	Suction Cover	Gray Cast Iron
	Middle Plate	-
	Oil Seal	Nitrile Butadiene Rubber
	Air Passage & Guide Vane / Casing	Gray Cast Iron
		Dual Inside Mechanical Seals (with Oil Lifter)
	Shaft Seal	Silicon Carbide
MOTOR	Type	Continuous-dutyRated, Dry-type Induction Motor
	Output kW	0.75	1.5	2.2	3.7	5.5
	Phase	Three
	Pole	2		4
	Speed (S.S.) 50/60Hz min^-1	3000/3600		1500/1800
	Insulation	E	F
	Starting Method	D.O.L.
	Motor Protector (built-in)	-
	Motor Protector (built-in)	CTP
	ml Lubricant	440	900	1350		4300
	ml Lubricant	Turbine Oil (ISO VG32)
	Frame	Gray Cast Iron
	Shaft	420 Stainless Steel
	m Power Cable	6				8
	m Power Cable	PVC				Chloroprene Rubber
Max. Water Depth ^*1 50/60Hz m		4.0 / 3.5	4	4.5	5	6
No. of Outlets m		1 (One Direction)
Dry Weight ^*2	Free Standing kg	28	43	75	91	142
Dry Weight ^*2	Guide Rail Fitting kg	23	34	73	87	126

PERFORMANCE CURVE

AIR FLOW RATE – WATER DEPTH CURVES

DIMENSIONS

FREE STANDING

Unit: mm

Model	A	A1	A2	B	D	D1	D2	W	H	H1	E1	E2	E3	E4	E5
8-BER	674	200	97	195	194	97	97	435	464	595	208	169	150	180	150
15-BER	895	244	114	225	222	111	111	490	562	-	270	267	150	180	159
22-BER	1158	317	154	312	316	150	166	640	679	1094	380	307	220	260	232
37-BER	1163	317	159	317	325	150	175	710	753	1145	380	307	220	260	237
55-BER	1415	360	194	341	391	188	203	820	942	1169	460	401	220	260	256

GUIDE RAIL FITTING

Unit: mm

Model	A	A1	A2	A3	B	D	D1	D2	W	H	H1	H2	M1	M2	E	E5
TOS-8BER	385	288	97	238	238	194	97	97	485	514	645	50	550	350	289	200
TOS-15BER	467	353	114	293	250	222	111	111	530	603	-	41	650	450	443	200
TOS-22BER	616	462	154	367	385	316	150	166	730	767	973	88	700	450	546	320
TOS-37BER	621	462	159	367	385	325	150	175	795	836	1048	83	700	450	546	320
TOS-55BER	711	517	194	422	385	391	188	203	885	1006	1368	65	750	500	711	320

SILENCER & VALVE SET

Unit: mm

Pipe Bore	A	B	C	G
ɸ 25	147	91	150	Rc 1
ɸ 32	180	116	208	Rc 1- ⅟₄
ɸ 50	230	154	285	Rc 2

Material of Silencer : PVC

DESIGN

SUBMERSIBLE AERATOR TRN SERIES & SUBMERSIBLE SELF-ASPIRATING JET AERATORS BER SERISE

1.Anti-wicking Cable Entry
Prevents water incursion due to capillary action should the cable sheath be damaged or the end of cable submerged. Also prevents moist air from infiltrating the motor housing and condensation from forming inside the housing due to temperature differences between the housing and outside air.

2.Motor Protector
Single-phase:
Detects excess heat, therefore, protecting the pump against overheating and dry-running.
Three-phase:
React to excessive heat caused by dry-running. The bimetal strip opens to cause the control panel to shut the power supply.

Circle Thermal Protector
Directly cuts the motor circuit if excessive heat builds up or overcurrent occurs in the motor.

3.Dual Inside Mechanical Seals with Silicon Carbide Face
Isolated in the oil chamber where a clean, non-corrosive and abrasion-free lubricating environment is maintained. Compared with the water-cooled outside mechanical seal, it reduces the risk of failure caused by dry-heating and adhering matter. The Silicon carbide provides 5 times higher corrosion, wear and heat resistance than the tungsten carbide. Rubber parts are made of NBR or FPM (FKM) which provides higher resistance to heat and chemicals.

4.Oil Lifter
Provides lubrication and cooling of the seal faces down to 1/3 of normal oil level, thus maintaining a stable shaft sealing effect and prolonging seal life longer. The Oil Lifter is Tsurumi original design.

5.Oil Seal
Used as a “Dust Seal,” it protects the mechanical seal from abrasive particles.

6.Air Seal Mechanism (TRN)
Protects the mechanical seals by flooding the air passage with an “air seal” that prevents water from contacting the mechanical seals during operation. This proprietary technology helps to prolong the service-life of the mechanical seals.

7.Patented Semi-open Impeller & Suction Cover (TRN)
Generates a liquid flow that causes negative pressure to form on the backside of the impeller vanes and draw in air from above the water’s surface. Both the impeller and suction cover are highly wear-resistant 410 stainless steel casting.

8.Air Release Valve (BER)
Fitted on the pump casing to prevent the air lock. When air flows through the valve, the ball stays at the bottom, but when the pumped water starts to flow, the ball closes the outlet because of its buoyancy.

9.Semi-open Channel Impeller (BER)
Minimizes the possibility of trouble due to clogging by foreign matters.

10.Nozzle Ring (BER)
Channels the water discharged from the pump into a jet, as part of the jet injector mechanism.

11.Diffuser (BER)
Creates a mixed flow of air and water by injecting the aspirated air into the water.

• Main Convection
Convection made by rising
bubbles. (The minimum
distance that must be
provided between each
aerator)

• Sub-convection
The maximum convection
that can keep solids sus-
pended to prevent sedi-
mentation of solids.