Top Mounting Level Switches Instruction Manual BE44 604 XDC 60 200 44
User Manual: XDC 60-200
Open the PDF directly: View PDF 
.
Page Count: 12
| Download | |
| Open PDF In Browser | View PDF |
T20 & T21 Top mounting Liquid level switches ® INSTRUCTION MANUAL AND REPLACEMENT PARTS DESCRIPTION T20 and T21 units are simple, reliable float switches designed for top mounting to tanks or vessels. T20 units utilize a single switch mechanism and float. T21 tandem units utilize two switch mechanisms and two separate floats when widely spaced actuating levels are required. T20 and T21 tandem models are available for any type of open or closed vessel with either threaded or flanged type mounting and actuating depths up to 1219 mm (48 inches) OPERATING PRINCIPLE A permanent magnet ① is attached to a pivoted switch actuator ②. As the float/ displacer ③ rises following the liquid level, it raises the attraction sleeve ④ into the field of the magnet, which then snaps against the non-magnetic enclosing tube ⑤, actuating the switch. The enclosing tube provides a static pressure boundary between the switch mechanism and the process. On a falling level, an inconel spring retracts the magnet, deactivating the switch. ② pivot ⑤ return spring ④ ③ ① AGENCY APPROVALS Agency Approval ATEX II 2G EEx d II C T6, explosion proof II 1G EEx ia II C T6, intrinsically safe CENELEC CCE ➀ EEx d II C T6, explosion proof FM Class I, Div. 1, Groups C & D Class II, Div. 1, Groups E, F & G, Type NEMA 7/9 Non-Hazardous area rising level falling level FM/CSA ➁ R1 (1) 136/MI/433, explosion proof Explosion proof area – Groups B, C, D, E, F & G Type NEMA 4X/7/9 UNPACKING Unpack the instrument carefully. Inspect all units for damage. Report any concealed damage to carrier within 24 hours. Check the contents of the packing slip and purchase order. Check and record the serial number for future reference when ordering parts. SAA ➁ LRS Explosion proof area Lloyds Register of Shipment (marine applications) GOST/ GOSGORTECHNADZOR ➁ Russian Authorisation Standards Other approvals are available, consult factory for more details ➀ For CCE approved units, use the ATEX explosion proof model numbers. ➁ Consult factory for proper model numbers. MODEL IDENTIFICATION A complete measuring system consists of: 1. Code for top mounted models (each unit can be factory calibrated when specific level differentials are specified separately – specify actuating level(s) for either rising or falling level and operating S.G.) 2. Code for modified models or adders: put an "X" in front of the closest matching order code and specify the modifications/ adders separately eg. XT20-AB2A-AAP X = with material certification EN 10204 / DIN 50049-3.1.B 1. Code for top mounting liquid float level switches BASIC MODEL NUMBER1 T 2 0 T 2 1 single float tandem float - top mounted liquid float level switch - top mounted liquid float level switch MATERIALS OF CONSTRUCTION Code Cage & process connection material A 316 SST (1.4401) 316/316L (1.4401/1.4404) D Magnetic sleeve 400 series SST Carbon steel B Float and trim 316 SST (1.4401) PROCESS CONNECTION 1" 4" 5" 6" DN 100 DN 150 Float sizes ø 76 x 127 mm (3" x 5") ø 102 mm (4") ø 114 mm (4 1/2") Threaded NPT connection - for T20 models only B2A B2B B2C ANSI Flanges - for all models 150 lbs RF 300 lbs RF 150 lbs RF 300 lbs RF 150 lbs RF 300 lbs RF H3A H4A J3A J3B J3C K3A K4A K3B K4B K3C K4C DIN flanges form to DIN 2526 - for all models PN 16 PN 25/40 PN 16 PN 25/40 PN 16 PN 25/40 Form C Form C Form C Form C Form C Form C 8FA 8GA 9FA 9GA 9FB 9GB 9FC 9GC SWITCH MECHANISM & ENCLOSURE (see page 3) complete code for top mounted models 2 MODEL IDENTIFICATION (cont.) Select electric switch mechanism & enclosure for models T20 (see page 3 for switch ratings) All models with material code A Weather proof (IP 66) qty and switch type A 3 B C D F HS U V W X cast Aluminium All models with material codes B and D ATEX (IP 66) FM (IP 66) II 2G EEx d IIC T6 II 1G EEx ia II C T6 II 2G EEx d IIC T6 NEMA 7/9 Weather proof (IP 66) cast Iron cast Alu. cast Aluminium M20 x 1,5 3/4" NPT cast Aluminium cast Aluminium ATEX (IP 66) FM (IP 66) II 2G EEx d IIC T6 II 1G EEx ia II C T6 II 2G EEx d IIC T6 cast Aluminium cast Aluminium NEMA 7/9 cast Iron cast Alu. M20 x 1,5 3/4" NPT 1" NPT M20 x 1,5 1" NPT M20 x 1,5 1" NPT M20 x 1,5 1" NPT 1" NPT M20 x 1,5 1" NPT M20 x 1,5 1" NPT M20 x 1,5 1" NPT 1 x SPDT A2P AAP AHC AAC - - AK7 AU7 AKP A2Q AAQ AH9 AA9 - - AK5 AU5 AKQ 1 x DPDT A8P ADP AJC ABC - - AD7 AW7 ANP A8Q ADQ AJ9 AB9 - - AD5 AW5 ANQ 1 x SPDT 32P 3AP 3HC 3AC - - 3K7 3U7 3KP 32Q 3AQ 3H9 3A9 - - 3K5 3U5 3KQ 1 x DPDT 38P 3DP 3JC 3BC - - 3D7 3W7 3NP 38Q 3DQ 3J9 3B9 - - 3D5 3W5 3NQ 1 x SPDT B2P BAP BHC BAC - - BK7 BU7 BKP B2Q BAQ BH9 BA9 - - BK5 BU5 BKQ 1 x DPDT B8P BDP BJC BBC - - BD7 BW7 BNP B8Q BDQ BJ9 BB9 - - BD5 BW5 BNQ 1 x SPDT C2P CAP CHC CAC C2L CAL CK7 CU7 CKP C2Q CAQ CH9 CA9 C2S CAS CK5 CU5 CKQ 1 x DPDT C8P CDP CJC CBC C8L CDL CD7 CW7 CNP C8Q CDQ CJ9 CB9 C8S CDS CD5 CW5 CNQ 1 x SPDT - - - - - - - - - D2Q DAQ DH9 DA9 - - DK5 DU5 DKQ 1 x DPDT - - - - - - - - - D8Q DDQ DJ9 DB9 - - DD5 DW5 DNQ 1 x SPDT F2P FAP FHC FAC - - FK7 FU7 FKP F2Q FAQ FH9 FA9 - - FK5 FU5 FKQ 1 x DPDT F8P FDP FJC FBC - - FD7 FW7 FNP F8Q FDQ FJ9 FB9 - - FD5 FW5 FNQ 1 x SPDT - - - - - - - - - H7A HM2 HFC HA9 - - HB3 HB4 HM3 1 x DPDT - - - - - - - - - H7C HM6 HGC HB9 - - HB7 HB8 HM7 1 x SPDT U2P UAP UHC UAC U2L UAL UK7 UU7 UKP U2Q UAQ UH9 UA9 U2S UAS UK5 UU5 UKQ 1 x DPDT U8P UDP UJC UBC U8L UDL UD7 UW7 UNP U8Q UDQ UJ9 UB9 U8S UDS UD5 UW5 UNQ - - - - - VFS VHS - - - - - - - V5S VBS - - - 1 x SPDT W2P WAP WHC WAC W2L WAL WK7 WU7 WKP W2Q WAQ WH9 WA9 W2S WAS WK5 WU5 WKQ WNQ 1 x DPDT - - - - - - - - - W8Q WDQ WJ9 WB9 W8S WDS WD5 WW5 1 x SPDT X2P XAP XHC XAC X2L XAL XK7 XU7 XKP X2Q XAQ XH9 XA9 X2S XAS XK5 XU5 XKQ 1 x DPDT - - - - - - - - - X8Q XDQ XJ9 XB9 X8S XDS XD5 XW5 XNQ Select pneumatic switch mechanism & enclosure - for models T20 only Pneumatic switch type NEMA 3R (IP 53) Max supply pressure bar (psi) Max liquid temperature °C (°F) Bleed orifice Ø mm (inches) material code A material codes B & D 6,9 (100) 200 (400) 1,60 (0.063) JDG JDE 4,1 (60) 200 (400) 2,39 (0.094) JEG JEE 4,1 (60) 370 (700) 1,40 (0.055) JFG JFE 6,9 (100) 200 (400) – KOE KOE 2,8 (40) 200 (400) – KOG – Series J (open air) Series K (closed circuit) Select electric switch mechanism & enclosure for models T21 All models with material code A qty and switch type A 3 B C D F U W X Weather proof (IP 66) cast Aluminium All models with material codes B and D ATEX (IP 66) FM (IP 66) II 2G EEx d II C T6 II 1G EEx ia II C T6 II 2G EEx d II C T6 NEMA 7/9 cast Aluminium cast Aluminium Weather proof (IP 66) FM (IP 66) cast Iron cast Alu. M20 x 1,5 3/4" NPT 1" NPT M20 x 1,5 1" NPT M20 x 1,5 1" NPT M20 x 1,5 1" NPT AV7 ALA A4B ABB AL9 AD9 - - AL5 AV5 ALB AO7 AY7 AOA A1B AEB AP9 AG9 - - AO5 AY5 AOB M20 x 1,5 1" NPT M20 x 1,5 1" NPT M20 x 1,5 1" NPT 2 x SPDT A4A ABA ALC ADC - - AL7 2 x DPDT A1A AEA APC AGC - - cast Aluminium ATEX (IP 66) II 2G EEx d II C T6 II 1G EEx ia II C T6 II 2G EEx d II C T6 NEMA 7/9 cast Aluminium cast Aluminium cast Iron cast Alu. M20 x 1,5 3/4" NPT 1" NPT 2 x SPDT 34E 3BE 39E 3DE - - 3L7 3V7 3LE 34B 3BB 3L9 3D9 - - 3L5 3V5 3LB 2 x DPDT 31A 3EA 3PC 3GC - - 3O7 3Y7 3OA 31B 3EB 3P9 3G9 - - 3O5 3Y5 3OB 2 x SPDT B4A BBA BLC BDC - - BL7 BV7 BLA B4B BBB BL9 BD9 - - BL5 BV5 BLB 2 x DPDT B1A BEA BPC BGC - - BO7 BY7 BOA B1B BEB BP9 BG9 - - BO5 BY5 BOB 2 x SPDT C4A CBA CLC CDC C4X CBX CL7 CV7 CLA C4B CBB CL9 CD9 C4T CBT CL5 CV5 CLB 2 x DPDT C1A CEA CPC CGC C1X CEX CO7 CY7 COA C1B CEB CP9 CG9 C1T CET CO5 CY5 COB 2 x SPDT D4B DBB DL9 DD9 - - DL5 DV5 DLB D4B DBB DL9 DD9 - - DL5 DV5 DLB 2 x DPDT D1B DEB DP9 DG9 - - DO5 DY5 DOB D1B DEB DP9 DG9 - - DO5 DY5 DOB 2 x SPDT FFA FBA FLC FDC - - FL7 FV7 FLA FFB FBB FL9 FD9 - - FL5 FV5 FLB 2 x DPDT FHA FEA FPC FGC - - FO7 FY7 FOA FHB FEB FP9 FG9 - - FO5 FY5 FOB 2 x SPDT U4A UBA ULC UDC U4X UBX UL7 UV7 ULA U4B UBB UL9 UD9 U4T UBT UL5 UV5 ULB 2 x DPDT U1A UEA UPC UGC U1X UEX UO7 UY7 UOA U1B UEB UP9 UG9 U1T UET UO5 UY5 UOB 2 x SPDT W4A WBA WLC WDC W4X WBX WL7 WV7 WLA W4B WBB WL9 WD9 W4T WBT WL5 WV5 WLB 2 x DPDT W1B WEB WP9 WG9 W1T WET WO5 WY5 WOB W1B WEB WP9 WG9 W1T WET WO5 WY5 WOB 2 x SPDT X4A XBA XLC XDC X4X XBX XL7 XV7 XLA X4B XBB XL9 XD9 X4T XBT XL5 XV5 XLB 2 x DPDT X1B XEB XP9 XG9 X1T XET XO5 XY5 XOB X1B XEB XP9 XG9 X1T XET XO5 XY5 XOB 3 INSTALLATION MOUNTING Before assembling control to tank or vessel, check threaded or flanged mounting nozzle for the following: – Nozzle length and inside diameter must be sized correctly to allow for switch actuation at design levels within the maximum differential available (see table on page 4). – Nozzle should be checked for horizontal alignment. Finished mounting must allow control switch housing to be within 3° degrees of vertical for proper operation. A three degree slant is noticeable by eye, but installation should be checked with a spirit level. OBSERVE ALL APPLICABLE ELECTRICAL CODES AND PROPER WIRING PROCEDURES NEMA 4x WIRING Most mechanical control switch housings are designed to allow 360° positioning of the cable entries by loosening the set screw(s). See figure 2. On high temperature applications (above 120° C [250° F]), high temperature wire should be used between control and first junction box located in a cooler area. Set screw NEMA 7/9 1. To gain access to switch mechanism(s) remove switch housing cover. 2. Pull in supply wires (conductors), wrap them around enclosing tube under the baffle plate and connect to correct terminals. Be certain that excess wire does not interfere with "tilt" of switch and that adequate clearance exists for replacement of switch housing cover. CAUTION: In hazardous area, do not power the unit until the cable gland is sealed and the enclosure cover is screwed down securely. Set screw Set screw Position screw CAUTION: - DO NOT attempt to reposition NEMA 4X / NEMA 7/9 housings without loosening the set screws. NOTE: See bulletin on switch mechanism furnished with your control (as listed below) for proper connections. 3. Connect power supply to control and test switch action by varying liquid level in tank or vessel. NOTE: If switch mechanism fails to function properly, check vertical alignment of control housing and consult installation instructions in switch mechanism bulletin. ATEX 4. Replace switch housing cover and place control into service. NOTE: If control has been furnished with an explosion proof (cast) or moisture proof (gasketed) switch housing, check the following: – After wiring connections have been completed, housings must be sealed via the correct cable gland to prevent entrance of air. – Check cover to base fit, to be certain gasketed joint is tight. A positive seal is necessary to prevent infiltration of moisture laden air or corrosive gases into switch housing. Switch mechanism Bulletin Mercury switches 42-783 A Dry contact switches 42-783 B, C, D, U, W, X Anti-vibration dry contact switches 42-684 G, H, I Bleed type pneumatic valve 42-685 J Non-bleed type pneumatic valve 42-686 K Anti-vibration mercury switches 4 Reference series E Locking screw Figure 2 CAUTION: - DO NOT attempt to reposition NEMA 4 / NEMA 7/9 housings without loosening the set screws; ATEX housings MAY NOT BE REPOSITIONNED. ALWAYS retighten set screw(s) after repositionning. - DO NOT attempt to unscrew cover of ATEX housings before loosening locking screw in base of housing. ALWAYS retighten locking screw after replacing cover. SWITCH DIFFERENTIAL ADJUSTMENT 5a. Perform system shut-down procedures as required to relieve pressure from tank or vessel and drain off liquid head, if required. Allow unit to cool. The standard differential of T20 and T21 Liquid Level Switches may be field adjusted. Adjustment may be necessary if a wider differential needs to be set to overcome switch chatter caused by the process. 5b. The amount of level travel between switch-on and switch-off actuations (differential) may be field adjusted by repositioning the lower jam nuts on the float stem. The standard factory setting is for a minimum amount of play (gap) between the top jam nuts and the attraction sleeve, as shown in Figure 4. This setting may be increased to a maximum of 13 mm (0.50"), as shown in Figure 5. The differential, or the amount of level travel between switch-on and switch-off, may be adjusted by repositioning the lower jam nuts on the float stem. The standard factory setting is for a minimum amount of play (gap) between the top jam nuts and the attraction sleeve as shown in Figure 4. NOTE: For assistance in computing level differential change for a specific control, consult the factory giving the model and serial numbers of the control. 6. Remove switch housing assembly by loosening hex nut, which is located immediately below housing base. Refer to Figure 3. CAUTION: Maximum differential adjustment is 13 mm (0.5"). Switch housing cover NOTE: To widen the differential 13 mm (0.5"), the lower jam nuts must be set proportionately lower on the stem (i.e. in this example 13 mm (0.5")). Enclosing tube Refer to Figures 4 and 5 Cable connexion CAUTION: Before attempting any work on the control, pull disconnect switch, or otherwise assure that electrical circuit(s) through the control is deactivated. Close operating medium supply valve on controls equipped with pneumatic switch mechanisms. Housing base Enclosing tube nut 1. Determine what change in differential is necessary. 2. Make sure power source is turned off. Float 3. Unscrew and remove switch housing cover. 4. Disconnect power supply wires from switch mechanism. Pull wires out of conduit connection opening in housing base. Refer to Figure 3. Slight play (gap) must be allowed (0.8 mm (.03") typical) Position of bottom jam nuts (normal factory setting) ;; ; ; ;; ;; ;; ;;; Figure 3 For access to bottom jam nuts, mark position, remove top jam nuts, washer, and attracting sleeve ;; ;; ;; ;; ;;; 13 mm (0.50") Replace in same position Maximum gap setting (Applies to models having a single switch mechanism with a single magnet actuator only) Drop bottom jam nuts to increase gap setting (see instructions below) Sleeve stop strap CAUTION: After increasing gap setting, be certain to check for proper operation of switch mechanism by raising and lowering float assembly. Magnet must snap cleanly, with additional float movement available after magnet snaps. Float Figure 4 Figure 5 Normal Factory Setting (minimum differential) Differential adjustment 5 SWITCH DIFFERENTIAL ADJUSTMENT cont. 7. With switch housing removed, jam nuts and attraction sleeve are accessible. Measure position of upper jam nuts from stem end; then loosen and remove upper jam nuts, guide washer, and attraction sleeve. 8. Loosen and adjust lower jam nuts to desired position. Make certain jam nuts are retightened securely. NOTE: Use new gasket in assembly of switch housing to chamber (Part No. 12-1301-002). CAUTION: Instructions given are for standard base model units which use a single magnet switch mechanism only. No differential adjustment should be attempted on tandem float models in the field. Switch actuation levels have been set at the factory to meet specific customer specifications. Variations in actual conditions from design conditions usually requires special control modifications. Consult with the factory or local representative for assistance 9. Test switch actuation by varying liquid level in tank or vessel. TROUBLE SHOOTING Usually the first indication of improper operation is failure of the controlled equipment to function, i.e.: pump will not start (or stop), signal lamps fail to light, etc. When these symptoms occur, whether at time of installation or during routine service thereafter, check the following potential external causes first. — Fuses may be blown. — Reset button(s) may need resetting. — Power switch may be open. — Controlled equipment may be faulty. — Wiring leading to control may be defective. If a thorough inspection of these possible conditions fails to locate the trouble, proceed next to a check of the control’s switch mechanism. CHECK SWITCH MECHANISM 1. Pull disconnect switch or otherwise disconnect power to the control. 2. Remove switch housing cover. 3. Disconnect power wiring from switch assembly. 4. Swing magnet assembly in and out by hand to check carefully for any sign of binding. Assembly should require minimal force to move it through its full swing. 5. If binding exists, magnet may be rubbing enclosing tube. If magnet is rubbing, loosen magnet clamp screw and shift magnet position. Retighten magnet clamp screw. 6. If switch magnet assembly swings freely and mechanism still fails to actuate, check installation of control to be certain it is within the specified three (3°) degrees of vertical (Use spirit level on side of enclosing tube in two place, 90° apart. 7. If mechanism is equipped with a mercury switch, examine glass mercury tube closely as previously described in “Preventive Maintenance” section. If switch is damaged, replace it immediately. 8. If switch mechanism is operating satisfactorily, proceed to check sensing unit. CHECK SENSING UNIT 1. Re-connect power supply and carefully actuate switch mechanism manually (using a non-conductive tool) to determine whether controlled equipment will operate. CAUTION: With electrical power “on”, care should be taken to avoid contact with switch leads and connections at terminal block. 6 2. If controlled equipment responds to manual actuation test, trouble may be located in the level sensing portion of the control (float, stem and magnetic attraction sleeve[s]). NOTE: Check first to be certain liquid is entering storage tank or vessel. A valve may be closed or pipe line plugged. 3. With liquid in tank or vessel, proceed to check level sensing action by removing switch housing assembly. 4. Inspect magnetic attraction sleeve(s) and inside of enclosing tube for excessive corrosion or solids buildup which could restrict movement, preventing sleeve(s) from reaching field of magnet(s). 5. If differential has been changed in the field, check tightness and position of the jam nuts. NOTE: Differential adjustment affects a change in the amount of level travel between “switch on” and “switch off” actuations. Do NOT attempt adjustment without first consulting factory for assistance in computing level differential change for your control. 6. Check float to be certain it is buoyant in the liquid (tank or vessel must have adequate liquid level). If float is determined to be filled with liquid or collapsed, it must be replaced immediately. Do NOT attempt to repair a float. If all the components in the control are in operating condition, the trouble must be (and should be) located external to the control. Repeat inspection of external conditions previously described. NOTE: When in doubt about the condition or performance of a Magnetrol control, return it to the factory. See “Our Service Policy” on back page. PREVENTIVE MAINTENANCE Periodic inspections are a necessary means to keep your Magnetrol level control in good working order. This control is, in reality, a safety device to protect the valuable equipment it serves. Therefore, a systematic program of "preventive maintenance" should be implemented when control is placed into service. If the following sections on "what to do" and "what to avoid" are observed, your control will provide reliable protection of your capital equipment for many years. WHAT TO DO WHAT TO AVOID 1. Keep control clean 1. NEVER leave switch housing cover off the control longer than necessary to make routine inspections. NEVER leave switch housing cover off the control. This cover is designed to keep dust and dirt from interfering with switch mechanism operation. In addition, it protects against damaging moisture and acts as a safety feature by keeping bare wires and terminals from being exposed. Should the housing cover become damaged or misplaced, order a replacement immediately. 2. NEVER use lubricants on pivots of switch mechanisms. A sufficient amount of lubricant has been applied at the factory to insure a lifetime of service. Further oiling is unnecessary and will only tend to attract dust and dirt which can interfere with mechanism operation. 2. Inspect switch mechanisms, terminals and connections monthly. 3. NEVER place a jumper wire across terminals to "cutout" the control. If a "jumper" is necessary for test purposes, be certain it is removed before placing control into service. – Mercury switches may be visually inspected for short circuit damage. Check for small cracks in the glass tube containing the mercury. Such cracks can allow entrance of air into the tube causing the mercury to "oxidize". This is noticeable as the mercury will appear dirty and have a tendency to "string out" like water, instead of breaking into round pools. If these conditions exist, replace the mercury switch immediately. 4. NEVER attempt to make adjustments or replace switches without reading instructions carefully. Certain adjustments provided for in Magnetrol controls should not be attempted in the field. When in doubt, consult the factory or your local Magnetrol representative. – Dry contact switches should be inspected for excessive wear on actuating lever or misalignment of adjusting screw at point of contact between screw and lever. Such wear can cause false switch actuating levels. Adjust switch mechanism to compensate (if possible) or replace switch. Do NOT operate your control with defective or maladjusted switch mechanisms (refer to bulletin on switch mechanism furnished for service instructions). – Magnetrol controls may sometimes be exposed to excessive heat or moisture. Under such conditions, insulation on electrical wires may become brittle, eventually breaking or peeling away. The resulting "bare" wires can cause short circuits. Check wiring carefully and replace at first sign of brittle insulation. – Vibration may sometimes cause terminal screws to work loose. Check all terminal connections to be certain that screws are tight. Air (or gas) operating medium lines subjected to vibration may eventually crack or become loose at connections causing leakage. Check lines and connections carefully and repair or replace, if necessary. – On units with pneumatic switches, air (or gas) operating medium lines subjected to vibration, may eventually crack or become loose at connections carefully and repair or replace, if necessary. NOTE: As a matter of good practice, spare switches should be kept on hand at all times. 3. Inspect entire unit periodically Isolate control from vessel. Raise and lower liquid level to check for switch contact and reset. 7 DIMENSIONAL SPECIFICATIONS mm (inches) Y X Y X Z V Z V W W 46 (1.81) Ref. 62 (2.44) 1" NPT Distance to actuating level min 102 (4) Distance to actuating level min 102 (4) Actuating level Actuating level Model T20 with 1" NPT Model T20 with flange Y X V Z W 46 (1.81) Ref. Distance to upper actuating level min 102 (4) Actuating level Distance to Maximum Minimum Upper level 1016 mm (40") 102 (4") Lower level 1219 mm (48") 305 (12") Distance to lower actuating level min 204 (8) Note: On model T21, the lower float actuates the upper switch mechanism. The upper float actuates the lower switch mechanism. Actuating level Model T21 with flange Housing type Models WeatherproofFM (NEMA 7/9) ATEX (Cast Alu) CENELEC (Cast Iron) Pneumatics Switch Module J Pneumatics Switch Module K V W mm inches T21 and T20 with HS-switch 257 10.12 T20 excl. HS-switch 202 7.94 All 249 All 165 øX mm inches mm inches mm inches 42 1.66 151 5.93 109 4.29 9.80 45 1.77 143 5.63 110 4.33 110 4.33 6.50 39 1.54 118 4.65 130 5.12 Allow 200 mm (7.87") overhead clearance / All housings are 360 ° rotatable 8 Y Z M20 x 1,5 (*) or 1" NPT (2 entries - 1 plugged) (*) not for FM (NEMA 7/9) M20 x 1,5 or 3/4" NPT (single entry - 2 entries at request) 1/4" NPT FLOAT SELECTION AND INSERTION DEPTH PRESSURE RATINGS T20/T21 switches are fabricated to meet customer specific insertion depth, from mounting fitting to actuating level. The maximum available insertion depth is governed by the liquid specific gravity and selected float size as given in the table below. The minimum insertion depth is 102 mm (4"). Float ratings are the maximum allowable pressure rating, even though the tank connections may have higher ratings. Pressure Rating Bar (PSIG) @ 40° C (100° F) @ Maximum Temperature 76 x 127 mm (3.00" x 5.00") 34,5 Bar (500 PSIG) 20,7 Bar @ 400° C (300 PSIG @ 750° F) 102 mm (4") 41,3 Bar (600 PSIG) 27,6 Bar @ 400° C (400 PSIG @ 750° F) 114 mm (4.50") 34,5 Bar (500 PSIG) 23,4 Bar @ 400° C (340 PSIG @ 750° F) T20 models - float sizes ø 76 x 127 mm Specific Gravity (3" x 5") ø 102 mm (4") ø 114 mm (4 1/2") 0.60 - - 140 (5.5) 0.70 - - 914 (36) 0.80 - 254 (10) 1219 (48) 0.90 432 (17) 813 (32) 1219 (48) 1.00 889 (35) 1219 (48) 1219 (48) T21 models - float sizes ➀ ø 76 x 127 mm ø 102 mm ø 114 mm Specific Gravity (4") (4 1/2") (3" x 5") 0.70 711 (28) 0.80 305 (12) 1219 (48) 0.90 406 (16) 660 (26) 1219 (48) 1.00 711 (28) 1016 (40) 1219 (48) ➀ Max actuating levels as per lowest float 9 REPLACEMENT PARTS ITEM SINGLE FLOAT MODELS T20-1 T20-4 DESCRIPTION 1 2 3 4 5 6 7 Housing Cover Housing Base Switch Mechanism(s) Attraction Sleeve Jam Nuts Guide Washer(s) Float Stem 8 Float 9 Attraction Sleeve, Stop Tube, and Washers Retaining Rings Float and Tube Assy. Adaptor Bushing Stem Guide Tube ➁ E-Tube Gasket Enclosing Tube 10 11 12 13 14 15 16 17 Mounting Flange ➂ Float Guide Cage (optional) ➃ 18 Guide Cage Gasket Size 4" 5" 6" 8" Housing Kits BASEEFA & CENELEC NEMA 4X, NEMA 7/9 Pneumatic housing (only for T20) Guide Cage Kits Consult Factory 07-1202-003 NOTES: ➀ All replacements furnished in kit form are for standard base models which use single magnet switch mechanisms only. Consult local representative for ordering assistance on all special model replacement parts not included in above listing. ➁ Float stem and tube component lengths are cut to meet original customer specifications. When ordering these replacement kits, be certain to always give complete model and serial numbers of control. ➂ Flanges listed are standard ANSI raised face items. When ordering, please specify size, type, and part number. ➃ Float cages are specially built to meet original customer specifications. When ordering, specify part numbers of float guide cage and gasket (as charted above relative to size of float and mounting flange respectively), as well as an overall cage length dimension from original assembly. 07-1202-003 07-1102-008 07-1102-009 07-1102-008 07-1102-009 FLOAT SIZE 3 X5 89-3230-001 NOT REQUIRED 4 Consult Factory 4.50 04-5734-126 04-5734-123 04-5734-126 04-5734-123 011-1418-194 011-1418-434 NOT REQUIRED 12-1301-002 032-6344-002 032-6344-001 032-6344-002 032-6344-001 032-6302-031 032-6302-036 032-6302-033 032-6302-037 See Replacement Mounting Flange Chart Guide Cages are special order items. NOT REQUIRED See Gasket Chart Below REPLACEMENT MOUNTING FLANGES (Item 16) ➂ 125 Lb. 150 Lb. 300 Lb. 150 Lb. Cast Iron Forged Steel Forged Steel Forged T-304 04-5840-001 04-5840-011 04-5840-016 04-5840-021 04-5840-002 04-5840-012 04-5840-017 04-5840-022 04-5840-003 04-5840-013 04-5840-018 04-5840-023 04-5840-004 04-5840-014 04-5840-019 04-5840-024 IMPORTANT: When ordering, please specify: A. Model and serial number of control. B. Name and number of replacement part or assembly (Kit). 10 Refer to bulletin on switch mechanism and housing furnished (listed on page 4). Float and Stem Kits ➀➁ FLOAT SIZE 3 X5 4 4.50 Upper Float and Tube Assy. Kit ➀➁ TANDEM FLOAT MODELS T21-1 T21-4 150 Lb. Forged T316 04-5840-026 04-5840-027 04-5840-028 04-5840-029 CAGE GASKETS (Item 18) 125 Lb. & 300 Lb. 150 Lb. 12-1301-014 12-1301-012 12-1301-008 12-1204-008 12-1301-009 12-1301-013 12-1301-026 12-1301-027 REPLACEMENT PARTS cont. 1 1 4 4 3 3 10 4 2 15 16 ;;;; ;; ;;;; ;;;; ;; 5 6 4 2 9 14 12 15 16 ;;;; ;; ;;;; ;;;; ;; 5 6 14 12 13 18 7 17 11 8 T20 7 8 T21 11 IMPORTANT SERVICE POLICY Owners of Magnetrol products may request the return of a control; or, any part of a control for complete rebuilding or replacement. They will be rebuilt or replaced promptly. Magnetrol International will repair or replace the control, at no cost to the purchaser, (or owner) other than transportation cost if: a. Returned within the warranty period; and, b. The factory inspection finds the cause of the malfunction to be defective material or workmanship. If the trouble is the result of conditions beyond our control; or, is NOT covered by the warranty, there will be charges for labour and the parts required to rebuild or replace the equipment. In some cases, it may be expedient to ship replacement parts; or, in extreme cases a complete new control, to replace the original equipment before it is returned. If this is desired, notify the factory of both the model and serial numbers of the control to be replaced. In such cases, credit for the materials returned, will be determined on the basis of the applicability of our warranty. No claims for misapplication, labour, direct or consequential damage will be allowed. RETURNED MATERIAL PROCEDURE So that we may efficiently process any materials that are returned, it is essential that a “Return Material Authorisation” (RMA) form will be obtained from the factory. It is mandatory that this form will be attached to each material returned. This form is available through Magnetrol’s local representative or by contacting the factory. Please supply the following information: 1. Purchaser Name 2. Description of Material 3. Serial Number 4. Desired Action 5. Reason for Return 6. Process details All shipments returned to the factory must be by prepaid transportation. Magnetrol will not accept collect shipments. All replacements will be shipped FOB factory. BULLETIN N°: EFFECTIVE: SUPERSEDES: UNDER RESERVE OF MODIFICATIONS www.magnetrol.com ® BE 44-604.10 JANUARY 2005 February 1997 BENELUX Heikensstraat 6, 9240 Zele, België Tel. +32 (0)52.45.11.11 • Fax. +32 (0)52.45.09.93 • E-Mail: info@magnetrol.be DEUTSCHLAND Alte Ziegelei 2-4, D-51491 Overath Tel. 02204 / 9536-0 • Fax. 02204 / 9536-53 • E-Mail: vertrieb@magnetrol.de FRANCE 40 - 42, rue Gabriel Péri, 95130 Le Plessis Bouchard Tél. 01.34.44.26.10 • Fax. 01.34.44.26.06 • E-Mail: magnetrolfrance@magnetrol.fr ITALIA Via Arese 12, I-20159 Milano Tel. (02) 607.22.98 (R.A.) • Fax. (02) 668.66.52 • E-Mail: mit.gen@magnetrol.it UNITED KINGDOM Unit 1 Regent Business Centre, Jubilee Road Burgess Hill West Sussex RH 15 9TL Tel. (01444) 871313 • Fax (01444) 871317 • E-Mail: sales@magnetrol.co.uk INDIA E-22, Anand Niketan, New Delhi - 110 021 Tel. 91 (11) 6186211 • Fax 91 (11) 6186418 • E-Mail: info@magnetrolindia.com
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.3 Linearized : No Page Count : 12 XMP Toolkit : Adobe XMP Core 4.2.1-c041 52.342996, 2008/05/07-20:48:00 Format : application/pdf Creator : Title : Top Mounting Level Switches Instruction Manual BE44-604 Subject : Top Mounting, T20, T21 Create Date : 2005:01:05 16:19+01:00 Creator Tool : QuarkXPress(tm) 5.01 Modify Date : 2009:03:19 13:54:02-05:00 Metadata Date : 2009:03:19 13:54:02-05:00 Producer : Acrobat Distiller 5.0.5 for Macintosh Keywords : Top Mounting, T20, T21 Document ID : uuid:7f2ca34d-f113-423b-957a-fadda05089f4 Instance ID : uuid:88fa0871-31b1-4585-9e6f-e2f8ff3bb551 Warning : [Minor] Ignored duplicate Info dictionaryEXIF Metadata provided by EXIF.tools