MAGNETIC FLOAT SWITCH, SERIES 137

Transcription

1 LEVEL MEAUREMENT & CTROL OLUTI MAGNETIC FLOAT WITCH, ERIE 137 FEATURE q Modular construction witch module. 2. Flange module. 3. Float module. This means it gives flexibility with unlimited switch combinations to suit individual needs. q Available in Electric On/Off and Pneumatic Proportional. q Electric witch available in Flameproof version. q Available with fixed or adjustable differential. q High temperature version available. q All wetted parts in stainless steel. q Different types of Float Chambers available. OPERATING PRINCIPLE N The Float movement of the level switch is transmitted through a solid non magnetic wall by the repulsion of like magnetic poles. This ensures that the float magnet imparts a snap action to the electric or pneumatic switch elements. `.B.E.M.' level switches are absolutely leak proof & not subject to material fatigue due to gland less design. N

2 HEET 02 OF 06 selection depending on application : q Output required : electric or pneumatic q Required action / function : Alarm annunciator, Motor starter or Pneumatic proportional valves. q of enclosure to meet environmental conditions: Flame Proof or Weather Proof IP 65 / IP 67. q Max. operating temperature inside vessel / tank for high temperature stand off. E EA EX EY Output Electric / Electric / Electric / flame proof to Group II A & II B as per I Terminal Configuration 1 WITCH MODULE Enclosure material of construction Degree Max. of ambient protection temp. Max. operating temp. C/O contact position with one microswitch tainless IP C C TOP steel AII 316 IP C C 11 Pole 24 C/O contact position with two microswitches 11 Pole TOP Pole Die cast Aluminium grade LM 6 tainless steel AII 316 Die cast Aluminium Grade LM 6 IP C C IP C C IP C C IP C C H High temp. stand off with electric / For high temp. stand off sleevecast aluminium Grade LM 6 IP C -20 to C IP C -20 to C 140 Operating pressure : 30 Kg/cm 2 (wet side) Gasket : AFR Contact rating : 5 Amps 230 VAC Resistive, (standard) CCE certificate no. : R(1) 136/B ELECTRO-MECHANICAL Dated - 19/03/97. CMR Certificate no. : V/1/1/501 Dated - 30/07/91. PNP Output Pneumatic Proportional E C Input / Output diagram and pressure ratings E - Exhaust Port - Input Port 1.4 Kg/cm 2 air pressure C - Controlled output port 0.2 to 1.0 Kg/cm 2 E Enclosure material of construction Max. ambient temp. Max. operating temp. Aluminium C C C upply connections : td. 1/8" NPT (female), Optional 1/4" NPT (male/female),1/4" BP (male/female) with adaptors. Instrument quality air supply is essential for PNP switch modules. For more details on PNP switch controller refer LF

3 HEET 03 OF 06 selection depending on : q tandard mounting flange q Flange / nozzle mounting to ANI, B, DIN, I 2 FLANGE MODULE Tank Material of Construction Mounting Details F tandard mounting square flange 4 HOLE f 14 PCD MOUNTING FACE BORE f 66 MIN 70 tainless steel casting AII 316 Direct mounting tank opening Min.- f 66 mounting holes to suit - M 12/ 1/2" BW A B D I lip on flange to suit side and top nozzles b a L mm BORE f 66 MIN a - sealing flange (fabricated) AII 316 b - slip on flange. carbon steel passivated sealing flange. lip on flange nozzle mounting range 2 1/2" NB to 6" for ANI, DIN, B and I NB L max. 2 1/2", 3" 70 4", 5" 80 6" 90 ORDERING INFORMATI CODE HIGH TEMPERATURE TAND - Not required H Required (only with electric - switch) CODE PNP PNEUMATIC Pneumatic proportional output CODE ELECTRIC - WITCH HOUING -E tainless steel -EA Aluminium -EX Flameproof stainless steel -EY Flameproof aluminium CODE CHANGE OVER CTACT 1 One (PDT) 2 Two (2 x PDT) CODE DEGREE OF PROTECTI 5 IP-65 (TD) 7 IP-67 CODE CABLE ENTRY IZE F 3/4" UNF (F) (TD) T 1/2" NPT (F) CODE TANDARD MOUNTING FLANGE F tandard square flange CODE LIP FLANGE TANDARD A ANI standard B B standard D DIN standard I I standard CODE IZE OF LIP FLANGE - For standard square flange 2 2 1/2" (65 mm) NB 3 3" (80 mm) NB 4 4" (100 mm) NB 5 5" (125 mm) NB 6 6" (150 mm) NB CODE FLOAT AEMBLY tandard float assly. H tandard float with - extension A Adjustable extension V Vertical extension Z Z type extension Extension length L in mm (for type B in cms) CODE BELLOW - Not Reqd. 1 Nitrile Rubber 2 Viton Rubber 3 ilicon Rubber ORDERING EXAMPLE MODULE CODE 1) P N P F Pneumatic proportional output with standard mounting square flange and standard float assembly. 2) H - E A 2 5 F B 4 V Electric / output, enclosure of aluminium construction with high temp. stand off having IP 65, degree of protection with 2 changeover contacts & 3/4" UNF cable entry connection. B-4" NB slip on flange, connected with vertical extension `v', control level of liquid mm from top.

4 selection depending on : q Mounting position q Level differential required q Output of switch module HEET 04 OF 06 3 FLOAT MODULE witch Orientation Float Travel Operating Differential tandard float assembly MOUNTING FACE f 64 FLOAT TRAVEL OPERATING DIFFERENTIAL 117 total With - switch module 12 mm total with pneumatic proportional switch + 20 mm - 15 mm H L f max. 247 max. with L = 990 mm (0.25 x L approx.) Variable with extension Length L = 990 mm max. A Adjustable differential extension 57 L with on- switch modules only Adjustable (approx.) Adjustable (approx.) td. extension length - L Length -000 Without extn mm mm mm. V Vertical extension with standard float assembly A B L Vertical Operating differential - min. 20, Max. 260 Distance of liquid level from mounting face - L L - min. 200, max. 800 A + B = max A/B < 4 A > B = x 2.62 (approx.) B = min 50 Z Z extension [to lower tripping point below mounting] Horizonal OD operating differential +/-10 Extension length LTP Lower trip point +/-25 mm L G = O.D / tandard / / For float travel & operating H / / Vertical differential refer application V Vertical Ext. note. With Bellows Material of construction - AII 316 stainless steel Numerical values are in mm. Operating differential values are referred to liquid density = 1 Minimum liquid density kg/dm 3 For `H' total length with extension - L mm (from mounting face) For `A' total length with extension - L mm (from mounting face)

5 APPLICATI EXAMPLE HIGH / LOW ALARM HEET 05 OF 06 TANDARD HORIZTAL MOUNTING CTROL WITH EXTENDED LEVEL DIFFERENTIAL ALARM AIR INPUT PNEUMATIC PROPORTIAL CTROL FIG. 1 CTROL OF PUMP OR VALVE WITH ADJUTABLE DIFFERENTIAL FIG. 2 INTERFACE CTROL FIG. 3 EXTERNALLY MOUNTED FLOAT WITCH FIG. 4 ET MOUNTING (2 EXTENI) FIG. 7 FIG. 5 Minimum information required to quote - 1)ketch giving details of installation 2)Application details Fluid Operating pressure Kg/cm 2 Operating temp. 0 C Minimum density Kg/dm 3 Tank material witch mounting position /Vertical 3)witch module Electric/Pneumatic proportional witch housing AII 316. Aluminium LM6. Contact rating 5 A/10A, 1 C/o / 2 C/o Degree of protection IP 65 / IP 67 High temp. stand off. Yes/No. 4)Flange module tandard square flange/slip on flange lip on flange as per ANI/B/DIN/I lip on flange material Nozzle size 2 1/2" NB to 6" NB 5)Float module td./hori. extn/ver.extn./adj. extn./ball type float Operating differential mm. Extension length horizontal Extension length vertical 6)Accessories (optional) Counter flange standard/extended Material of counter flange C/316 Float chamber type Float chamber material FIG. 6

6 HEET 06 OF 06 FLOAT CHAMBER (FOR EXTERNAL MOUNTING) END OF PIPE AVAILABLE BARE WELDABLE (A HOWN) - FLANGED 1" - NIPPLE 1" 1" NB PIPE M 12 TUD 4 NO. EQIP. P.C.D. FOR DETAIL REFER LF f MIN. TO 600 MAX TYPE A TYPE B TYPE C TYPE D 300 MIN. TO 600 MAX. TYPE E TYPE F (LH connection) TYPE G (RH connection) TYPE H MOUNTING ACCEORIE f 66 f 76 M 12, 4 NO., P.C.D. A. Counter flange - (weldable) Matl. : AII - 316/C painted Construction : fabricated. - To facilitate welding of counter flange on tank, provide f 77 hole on the tank B. Counter flange extended - (weldable) Matl. : AII - 316/C painted Construction : fabricated. - To facilitate welding of counter flange on thick coated tank, provide f 77 hole on the tank. *** Continuous developments may necessitate changes without notice. LF R04 03/2003 BEM Pvt. Ltd. 39, Electronic Co-Operative Estate, Pune atara Road, Pune (INDIA) Tel , Fax sbemsales@sbem.co.in, sbemsales@vsnl.com Works : Bibwewadi Industrial Estate, 691/A/2, Pune-atara Road, Pune (India) mfg@sbem.co.in Office : MUMBAI CHENNAI NEW DELHI Tele. : , , , Fax : mumbai@sbem.co.in chennai@sbem.co.in newdelhi@sbem.co.in