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Vacuum Switch MD Series

Varieties of Vacuum Switches are available on the basis of the Enclosure like IP 54, IP 54, IP 65 or, IP 66

Adjustable Range : 760 to 100 mm Hg Vacuum

Diaphragm : Teflon or, Neoprene

Pressure Housing MOC : Aluminium, Brass or, SS 316

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Vacuum Switch MD Series

  1. 1. MD VACUUM SWITCHES Locking screws for drift proof settings Large springs for easy setting Separate terminal block for wiring Unique scale enhancement mechanism for fine setting resolution Bell crank lever for movement transmission Robust microswitch for reliable switching Bearing surface of lever for smooth motion Incast pin as a robust fulcrum Extra large scale with finer least counts for easier setting Protective cap for tamperproof settings Captive cover screws Environment protected switch with IP66 protection External mounting holes for easy mounting/ dismantling Choice of conduit entries for various cable sizes Approximate Weight : 1.500 Kg. Some Applications : Used in filters, vacuum pumps, blower systems, etc. Electrical Fig. 2 Connection : Z 2 3 1
  2. 2. VACUUM SWITCHES MD PRESSURE CAPSULE DETAILS 6 5 4 3 2 1 Note : wetted parts are mentioned in italics. INSTALLATIO N DRAWI NG 147 (5.78) Set Screw Cap 130 (5.11) 112.5 (4.43) No. Description 1. Disc 2. Diaphragm 3. Plunger (SS316) 4. Junction Plate 5. Sealing 'O' Ring (Teflon®) 6. Sealing diaphragms (Teflon®) 62 (2.44) Mounting Holes 2 Nos, Ø6.5 0.25 Vacuum Port 1/4" BSP (F) Cable Entry Ø5 Hole 37 (To be always open to atmosphere) (1.45) 25.4 (1.00) 50.8 (2.00) APPROX. DIMENSIONS IN inches
  3. 3. MD VACUUM SWITCHES RANGE SELECTION TABLE Range Code Range mm Hg (" Hg) Differential* mm Hg ("Hg) Maximum Working Pressure bar (psi) Approximate Maximum for "A1" microswitch V00 † 760 - 100 (29.92 - 3.94) 30 (1.181) 12 (174.05) *Minimum differential increases with setpoint (Graphs available on request) † Typical values achieved at sea level, total vacuum that can be achieved varies mainly with altitude. * Note : Microswitches A2 through A7 can be supplied in some ranges and differentials will vary with microswitch used. Please contact sales office for details. Please check availability of adjustable differential with sales office.
  4. 4. Con nuous efforts for product development may necessitate changes in these details without no ce st ct EtySzStcTy vs cstc Ty GoupGoupGoupGoupGoupGoupGoupGoup = = Tf V= GoupGoupGoupGoupGoupGoupGoupGoup VFVAS = Ist ssstc tcst A cst IPs IS svf st tst cv ct.W vy fct, yft tf syts tcst. = ½PTts = ¾PTts = X. ts Psscfyfmmrtvmty. .Avctfstc,t½"PTctyssSPTssstc,fxfftttsc,v tvc,tA.cstc,SSssst¼BSPtsz&sscfy = tt = = = = = = = A/ ¼"BSPF = A/ ¼PTF S= SS/ ¼"BSPF S= SS/ ¼PTF PssPt t/Sz VF= VF= VF= V= V= V= AvtA y NK Instruments Pvt. Ltd.B-501/504, 5th floor, Raunak Arcade, Near THC Hospital, Gokhale Road, Naupada, Thane(W) 400602. Maharashtra INDIA Telefax Nos.: 91-22-25301330 / 31 / 32 E-Mail: Web: Skype: nitinkelkarskype Gtalk: nkinstruments2006 Authorised Dealer