Allfluid pressure switches 20D to ATEX
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1 bar For Ex zones 1 and 2 (gases) as well as Ex zones 21 and (dusts) category II2G, type of protection EEx de IIC T6 Microswitch with gold plated contacts Electrical connection: connector M20 x 1,5 Robust metal housing in weather-resisting version Technical data Medium: For neutral, non-inflammable gases and fluids Operation: Softseal piston Stainless steel bellow Fluid connection: G1/2 Operating pressure range: bar Temperature: Fluid Ambient -10* C -10* C *Please contact our technical service for use below +2 C Repeatability: ±1% of final value (depending on regulating pressure) Microswitch With gold plated contacts Degree of protection (acc. to DIN 40050): IP65 Mounting position: Optional Shock-/vibrations (to avoid if possible): 4 g max. (sinusoidal) / 5 Hz max. Sealing: < 10-7 mbar l s -1 Pulsations: Not permitted Switching cycles: 20/min. max. Materials: Housing: aluminium diecast : stainless steel Sealing: stainless steel-bellows Ordering information See page 2 Alternative variants Examination test acc. to pressure equipment directive 79/23/EC (DIN /DIN EN 1854) on request p Switching function: Microswitch SPDT (commutator) Terminals 1-3: Contacts close on rising pressure Terminals 1-2: Contacts open on rising pressure N/UK
2 Operating pressure range for 184 (fixed switching pressure difference) Type Operating pressure range *1) Over pressure *2) typical value Pressure sensor material Fluid port Dimensions see page pvu min. to pvo max. lower range upper range bar (VDI 3283 ) bar bar bar bar ,20 0,23 1,4404 B ,20 0,25 1,4404 B ,5 10 0, 0,26 1,4404 B , ,16 0,18 1,4404 B ,6 10 0,16 0,20 1,4404 B , ,50 0,55 1,4404 B , ,60 0,70 1,4404 B , ,70 0,90 1,4404 B ,00 1,40 1,4404 F ,30 1,80 1,4404 F ,00 5,00 1,4404 H 4 Operating pressure range for 185 (adjustable switching pressure difference) Type Operating pressure range *1) pvu min. to pvo max. (VDI 3283 ) bar Over pressure *2) typical value lower range upper range minimum maximum Pressure sensor material Fluid port bar ,19 0,25 0, B G1/ ,20 0,30 1, B G1/ ,5 10 0,20 0,28 2, B G1/ , ,16 0,18 0, B G1/ ,6 10 0,10 0,16 1, B G1/ ,1...2,5 10 0,18 0, 2, B G1/ , ,50 0,60 2, B G1/ , ,60 0,70 5, B G1/ , ,70 0,90 8, B G1/ ,60 1,90, F G1/ ,60 2,20 20, F G1/ ,00 5,00 20, H G1/2 4 *1) Bezugsdruck ist der atmosphärische Luftdruck *2) Auch kurzzeitige Druckspitzen während des Betriebes dürfen diesen Wert nicht überschreiten. Eine betriebsmäßige Ausnutzung des Grenzwertes ist nicht zulässig. Der Grenzwert entspricht dem max. Prüfdruck. F = Faltenbalg pvu = Schaltpunkt bei fallendem Druck pvo = Schaltpunkt bei steigendem Druck Dimensions see page Options selector Substitute fixed 4 adjustable 5 Ordering information ATEX pressure switch with fixed switching pressure difference, switching point at 4 bar, connection, Electrical connection M20 x 1,5, medium: water, Quote: Operating pressure range (bar) Substitute ,5 04 0, ,6 0,1... 2,5 13 0, , , Warning These products are intended for use in industrial compressed air systems only. Do not use these products where pressures and temperatures can exceed those listed under Technical Data. Before using these products with fluids other than those specified, for non-industrial applications, life-support systems, or other applications not within published specifications, consult NORGREN. Through misuse, age, or malfunction, components used in fluid power systems can fail in various modes. component parts used in fluid power systems and to provide adequate safeguards to prevent personal injury or damage to equipment in the event of such failure. System designers must provide a warning to end users in the system instructional manual if protection against a failure mode cannot be adequately provided System designers and end users are cautioned to review specific warnings found in instruction sheets packed and shipped with these products. The system designer is warned to consider the failure modes of all N/UK Konstruktionsänderungen vorbehalten Our policy is one of continued research and development. We therefore reserve the right to amend, 7/06
3 Accessories Brackets Surge damper Pressure port reducing nipplel Page 5 Page 5 Page (steel) (stainless steel G1/4) (G1/2 1//2 NPT) (stainless steel) (brass/steel) G1/4) (G1/4 G1/2) (stainless steel G1/2 ) (G1/4 G3/8) (G1/4 1/4 NPT) Switching capacity Commutator with gold plated contacts Load level Current Load type Umin Max. permanent current Imax [A] at U [V] Contact life type [V] M x1 Standard *3) AC ohmic switching cycles (z.b. contractors, AC inductive, solenoids) cos ϕ 0, DC ohmic 5 1,2 0,8 0,4 DC inductive, 3 0,5 0,35 0,05 L/R 10 ms Minor *4) AC ohmic 5 *6) 0,34 0,2 0,17 0,08 0, switching cycles (z.b. electronic DC inductive, circuits) L/R 10 ms 5 *6) 0,1 0,01 Reference number: 30/min, Reference temperature: +30 C Spark quenching with diode with DC and inductive load: I max = 1,5 x I max of table I min = 1 (ma) Creepage and air paths correspond to insulation group B according to VDE Reg (except contact clearance of microswitch). *3) Gold-plating not required as it would decay. Max. perm. in-rush current (appr. 30 ms) I AC = max. 15 A *4) Gold-plating required (will not decay). *6) Lower value of critical voltage guarantees sufficient contact safety. Lower voltages permissible under favourable conditions. Spark quenching with DC voltage 1. Diode D in parallel to inductive load. Observance of correct polarity (positive pole to cathode). Dimensioning specifications for quenching diode: Rated voltage at diode: UD 1,4 x Us Rated current at diode: I N ILast Selection of a quick switching diode (recovery time trr 200 [ms]). 2. RC link in parallel to load in parallel to switching contact. Suited for DC and AC voltage. Dimensioning principles: R in 0,2 x RLoad in C in [µf] ILoad in [A] + (AC) p U S - (AC) R Last I Last D R C N/UK
4 25 20 H Allfluid pressure switches 20D Dimensions (mm) 115,5 19 5, H M4 x 10 deep Connector M20 x 1,5 acc. to EEx e (ATEX), Nickel plated brass for cabel Ø 5 to 8 mm (Type: ) ca. 27 M 20 x 1,5 6 ø 5-8 combinations Operating pressure range code type Substitute B 02 B 04 B 11 B B 13 B 14 B 15 B 16 B 17 F 18 F 19 H Style F+H H B type B F H Style B ø B ø B N/UK Our policy is one of continued research and development. We therefore reserve the right to amend, 7/06
5 Brackets (2 brackets and 4 screws) Steel Type: Stainl. steel (AISI 304) Type: ,8 118 Surge damper Stainless steel (AISI 304) Type: Brass/steel Type: Stainless steel (AISI 304) Type: ø 21, Pressure port/reducing nipple G1/2 I to G1/2 NPT A G1/4 A to G1/2 A Stainless steel Stainless steel (AISI 303/304 S) (AISI 303/304 S) Type: Type: G1/4 A to G3/8 Steel Type: G1/4 A to 1/4 NPT Brass Type: G1/4 27 1/2 NPT,5,5 G 3/8 ø21, /4 NPT ø 20 6,5 30 N/UK
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