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LTG Incorporated
Prefilter Type TVM / TVN
LTG Incorporated105 Corporate Drive, Suite ESpartanburg, SC 29303PO Box 2889, Spartanburg, SC 29304USATel: 864--599--6340Fax: 864--599--6344e--mail: [email protected]: http://www.LTG--INC.net
LTG AktiengesellschaftGrenzstrasse 7, D--70435 StuttgartPO Box 40 05 25, D--70405 StuttgartGermanyTel: 49--711--8201--180Fax: 49--711--8201--720e--mail: [email protected]: http://www.LTG--AG.de
TVM/TVN-USA-TP-01 (09/02) 451-35
E LTG Incorporated ∙ PO Box 2889 ∙ Spartanburg, SC 29304/USA ∙ ✢ 864/599--6340 ∙ Fax 864/599--6344 TVM/TVN--USA--TP (09/02)e--mail: [email protected] ∙ Internet: www.LTG--Inc.net ∙ Former editions are invalid. ∙ Subject to technical modifications. 3
Prefilter Type TVM / TVN
To filter out the coarse particles from large air streams, itis best to use an appropriate prefilter screen. Its characte-ristics are:
- high air permeability- exact adaptation to thematerial to be separated by usingdifferent mesh sizes
- good separation of various size particles- low maintenance
TheLTGPrefiltersType TVMandTVNare rotating, con-tinuously cleaned filter discs.They can be used within an extremely large air volumerange of 9,000 -- 80,000 cfm (15,000 -- 135,000 m3/h).The compact and robust design offers the highest degreeof reliability and safety.
Prefilter Type TVM with front and rear housing
ApplicationThe LTG Prefilters Type TVM and TVN are most effec-tive for extract air streams with a high content of fibersand particles of varying materials, sizes and shapes. Thetype TVM is prefered for use in case of heavy loads of in-dividual fibers and particles. Type TVN is used for smal-ler loads of fibers and mixed particles that may get to thefilter continuously or intermittently. They are used in in-dustries such as
- textile industry- nonwovens industry- wood working industry- paper industry- cellulose industry- tobacco industry- fiberglass industry
Advantages regenerative filter unit nopressure fluctuations in the suction systemdue to con-tinuous cleaning
space saving installation due to the disc shape and thecompact design
optimum velocity is achieved by exact adaptation to thetotal air quantity
no fiber contamination of drive elements and easy accessby installation behind the prefilter screen
easy filter media change pressure drop is minimized by optimal airflow design
Prefilter Type TVM with front housing
FunctionTheLTGPrefiltersTVMandTVNconsist of an enclosurewhich is separated by a dividingwall inwhich the rotatingfilter disc is mounted. The dirty and clean air side is sea-led off by a felt seal around the filter disc.The continuous cleaning of the filter disc is by suctionthrough a stationary slot nozzle (Type TVM) or by a tra-versing round nozzle (Type TVN). The nozzle does nottouch the filter screen during cleaning.The filter screen and nozzle is driven by a drive motorwith belt drive mounted to the filter disc on the clean airside.
E LTG Incorporated ∙ PO Box 2889 ∙ Spartanburg, SC 29304/USA ∙ ✢ 864/599--6340 ∙ Fax 864/599--6344 TVM/TVN--USA--TP (09/02)e--mail: [email protected] ∙ Internet: www.LTG--Inc.net ∙ Former editions are invalid. ∙ Subject to technical modifications. 4
Prefilter Type TVN / TVN
Technical Data
Type
Diameterof
filter disc
Screenmesh
hole size*)Max.
Air volume
Suctionair
quantity
Suctionpressure at suc-tion nozzle
Enclosurewithaccess
inch [mm] ←←←←m cfm [m3/h] cfm [m3/h] ”wg [Pa]**)access
TVM 15
TVM 20
TVM 25
59.06 (1 500)
78.74 (2 000)
98.43 (2 500)
150 -- 1 00024,000 (40,000)40,000 (70,000)80,000 (135,000)
650--2 400(1 100--4 100) 9 (2 200) in front/
behind
TVN 15
TVN 20
TVN 25
59.06 (1 500)
78.74 (2 000)
98.43 (2 500)
150 -- 1 00024,000 (40,000)40,000 (70,000)80,000 (135,000)
590(1 000)
9 (2 200) in front/behind
*) For use with high temperatures, aggressive gases, abrasive solid particles and for fire protection, stainless steelscreens are available.
**) If prefilter suction loop is not coming back to the prefilter system, pressure must be added.
Electrical Equipment
Drive for prefilter discWorking shaft speed rpm 50 Hz
60 Hz28
33,6Rotor shaft speed rpm 50 Hz
60 Hz13501620
Motor power hp [kW] 0.33 (0.25)Motor protection Thermistor sensor 320 _F (160 _C)Voltage VFrequency HzRated current A
230/40050/600.85
290/50050/600.68
330/57550/600.59
Housings (option)The prefilters type TVMandTVNshould be orderedwithfront and rear housing (see pictures page 3) for applica-tions in exhaust air plants in modular construction for ex-ample.
ShippingThe prefilters type TVM and TVN are shipped disassem-bled and assembled on site.
E LTG Incorporated ∙ PO Box 2889 ∙ Spartanburg, SC 29304/USA ∙ ✢ 864/599--6340 ∙ Fax 864/599--6344 TVM/TVN--USA--TP (09/02)e--mail: [email protected] ∙ Internet: www.LTG--Inc.net ∙ Former editions are invalid. ∙ Subject to technical modifications. 5
Prefilter Type TVM / TVN
Selection diagram(Pressure drop over air flow velocity, air volume depending on size and cover plate)
4,7
13,2 16 19
8,0 10 12 15 20 10² c [fpm]
0,4
0,8
1,2
1,61
2
ααααp Filter [inch H2O]
6,0
15
20
25
Size Cover plate 39.37
29.53
15.75
cfm 1034,1 5,8 7,1 8,2 9,4 11 12 13
cfm 10²
cfm 10²
7 8,2 9,4 10,6 12 15 17,6
8,8 11,8 15 17,6 20,6 23,5 26,5
cfm 10²
fm 10²
cfm 10²
cfm 10²
cfm 10²
58.27
49.21
39.37
29.53
23.62
7 8,2 9,4 11,8 14,7 17,6
cfm 10²
cfm 10²
cfm 10²
cfm 10²
cfm 10²
11,8 15 20,6 23,5 29,5
15 20,6 23,5 29,5 35
15 17,6 20,6 23,5 29,5 35 41
17,6 20,6 23,5 29,5 35 41 47
29,523,5 35 41 47 63
23,5 29,5 35 41 47 63 68,9
29,5 35 41 47 63 68,9 70,6
29,5 35 41 47 63 68,9 70,6 82,4
29,5 35 41 47 63 68,9 70,6 82,4
0,2
17,6
17,6
58.27
49.21
39.37
29.53
23.62
recommendedrange of application
Diameter[inch]
E LTG Incorporated ∙ PO Box 2889 ∙ Spartanburg, SC 29304/USA ∙ ✢ 864/599--6340 ∙ Fax 864/599--6344 TVM/TVN--USA--TP (09/02)e--mail: [email protected] ∙ Internet: www.LTG--Inc.net ∙ Former editions are invalid. ∙ Subject to technical modifications. 6
Prefilter Type TVM / TVN
Dimensions Type TVM
DB
x C
A
D B x C
A
0.98
(25)
0.98 (25)1.97 (50)
0.4 (10)
9.6
(244
)
9.6 (244) 5.91(150)
5(127)
A/2
9.84 (250)
19.69 (500)suction connection
alternatesuctionconnection
nozzle clean out
TVM 15 TVM 20 TVM 25
A inch[mm]
66.93(1 700)
86.61(2 200)
107.87(2 740)
B 3 5 5
C inch[mm]
15.75(400)
15.75(400)
19.67(500)
D inch[mm]
8.18(208)
11.06(281)
14.72(374)
Suction connection
TVM 15 TVM 20 TVM 25
Opening Øinch[mm]
8(203)
10(254)
12.52(318)
Screw holesinch[mm]
9.26(235)
11.26(286)
14.02(356)
Hole circleinch[mm]
6 x Ø 0.28(6 x Ø 7)
6 x Ø 0.28(6 x Ø 7)
8 x Ø 0.28(8 x Ø 7)
E LTG Incorporated ∙ PO Box 2889 ∙ Spartanburg, SC 29304/USA ∙ ✢ 864/599--6340 ∙ Fax 864/599--6344 TVM/TVN--USA--TP (09/02)e--mail: [email protected] ∙ Internet: www.LTG--Inc.net ∙ Former editions are invalid. ∙ Subject to technical modifications. 7
Prefilter Type TVM / TVN
Dimensions Type TVN
Ø 0.4(10)
0.98 (25)
1.97 (50)
0.98
(25)
1.97
(50)
6.02 (153)
5.9 (150)
12.6 (320) 9.84 (250)
Nom Ø 3.54(90)
SuctionconnectionØ 4.8 (122)4x 0.37 (9.5)
Ø 0.4 (10)
TVN 15 TVN 20 TVN 25
A inch[mm]
66.93(1 700)
86.61(2 200)
107.87(2 740)
B 3 5 5
C inch[mm]
15.75(400)
15.75(400)
19.67(500)
D inch[mm]
8.18(208)
11.06(281)
14.72(374)
E LTG Incorporated ∙ PO Box 2889 ∙ Spartanburg, SC 29304/USA ∙ ✢ 864/599--6340 ∙ Fax 864/599--6344 TVM/TVN--USA--TP (09/02)e--mail: [email protected] ∙ Internet: www.LTG--Inc.net ∙ Former editions are invalid. ∙ Subject to technical modifications. 8
Prefilter Type TVM / TVN
Housing dimensions
Ø 0.4(10)
Ø 0.4 (10)
19.69 (500)0.98 (25)1.97 (50)
0.98
(25)
1.97
(50)
TVM/N 15 TVM/N 20 TVM/N 25
A inch[mm]
66.93(1 700)
86.61(2 200)
107.87(2 740)
B 3 5 5
C inch[mm]
15.75(400)
15.75(400)
19.67(500)
