Cat.No. A6-27 CB Pressure Switch Explosion-Protected Construction Pressure Switch OUTLINE This device is a dead-band adjustable pressure switch designed and manufactured to ensure durability and reliability with an accuracy of.5% max. P. It has excellent vibration-proof characteristics thanks to its double snap action(using Belleville spring) and is therefore ideal in the site for direct control of equipment. FEATURES With the application of a Bellebille spring, this pressure switch demonstrates excellent vibration resistance and durability. (Double Snap Action Mechanism) Adjustable range of dead-band is ~ 2% max. P. Since setting is by multiple rotations (5 rotations / max. P.), accurate setting is possible. Acid-proof coating prevents rusting from salt damage. To keep high accuracy and long life of pressure switch, pressure adjustable range should be to 65% of pressure range. Please pay attention whether wetted parts materials are suitable for gas or liquid to be measured or not. SPECIFICATION Model: CB General process use Explosion-protected construction (Exd II B+H2 T4) Fluid: Gas or liquid Operating condition: CB Under the normal condition, where there is no inflammable gas or liquid which cause the ignition or explosion. Hazardous area The details refer to explanation column of explosion-protected construction. Connection: G/8B(PF), G/2B(PF), Rc/4(PT), Rc/2(PT), /4NPT female, /2NPT( only) For other connections, please contact us. Wetted parts material: Bellows 6Lst.st. Tank socket 6st.st. Please contact us if phosphor bronze bellows (brass body) is required. (CB only) : CB. ~. h.5 ~ 5MPa (. ~ h 5 ~ 5kgf/cm 2 ) -. ~ (- ~ kgf/cm 2 ). ~. h ~ MPa(. ~ h ~ kgf/cm 2 ) -. ~ (- ~ kgf/cm 2 ) Proof-pressure:.5 ~ 2MPa (.5 ~ 2kgf/cm 2 ) (Depending on range) Operating temperature: CB -2 ~ 6g -5 ~ 4g Accuracy: CB.5%max.P..%max.P. Dead band: Adjustable ~ 2%max.P. Switch: Number of contact: One contact (Standard, direct current use) or two contact (Setting dual circuit) Setting system: Internal adjustment type Outlet for electric wire: CB Conduit type PF/2 female Flame-proof packing type Case material finishing: CB Aluminium alloy die casting (ADC2) Blue & Gray Epoxy painted Aluminium alloy casting (AC7A) Blue & Gray Epoxy painted Construction: IP65
SPECIFICATION 2 Terminal box:(option)cb only Although the wire used to have to be removed from the terminal plate and the tester terminal pressed against it when measuring contact resistance, with the provision of a check terminal, simply remove the screws on the terminal plate and insert the terminals of the tester. This ensures stability when measuring and eliminates the trouble of removing the wire from the terminal plate. Operation lamp:(option) CB only The on/off state of the pressure switch and the operating state of the microswitch can also be confirmed at a glance. Weight: CB Approx. 2kgs Approx. 5kgs Electric characteristics: Switch Rating Load resistance Inductive load Withstand voltage Insulation resistance Single setting 25V AC 25V AC 25V DC 25V DC A A.5A.25A 6A 4A.5A.A Single setting direct current use Single setting dual circuits 25V AC 25V AC 25V DC 25V DC 25V AC 25V AC 25V DC 25V DC A A A A A A.5A.25A 6A.5A 6A.5A 6A 4A.5A.A 2V AC Beween terminal and case minute 5V DC MΩ over Beween terminal and case Inductive load :Power factor.4 over(ac) Time-constant 7ms or less(dc) One contact direct current use: Direct current rating is bigger than standard. and dead band Proof-pressure: MPa(kgf/cm 2 ) (Adjustable range) Dead band MPa(kgf/cm 2 ) (Adjustable range) Proof-pressure MPa(kgf/cm 2 ) -. ~ (-~ ).~.2 (.~.2).5 (.5).~. (.~ ).~.2 (.~.2).5 (.5).2~.2 (.2~ 2).6~.4 (.6~.4). ().~. (.~ ).9~.6 (.9~.6).45 (4.5).4~.4 (.4~ 4).2~.8 (.2~.8).6 (6).6~.6 (.6~ 6).8~.2 (.8~.2).9 (9). ~ (~ ). ~.2 (. ~ 2).5 (5).5~.5 (.5~ 5).45~. (.45~ ) 2.25 (22.5).2 ~2 (2~ 2).6 ~.4 (.6 ~ 4) (). ~ (~ ).9 ~.6 (.9 ~ 6) 4.5 (45).5 ~5 (5~ 5).5 ~ (.5 ~ ) 7.5 (75).7 ~7 (7~ 7).2 ~.4 (2. ~ 4).5 (5) ~ (~). ~2 ( ~ 2) 5 (5).5 ~5 (5~5) CB only.75 ~ (7.5 ~ ) 2 (2)
DIMENSIONS CB (.8) 5. 8 26.5 92 DIA. 8-6 DIA. Mounting hole 96 For range.mpa 8 (kgf/cm 2 ) or less 2 77 69 NAGANO KEIKI 5 69 (2.5) Bracket For range.mpa (kgf/cm 2 ) or less 45 22 PF/2 5 6 G/2B(PF).4,.6,,.5,2,MPa (4,6,,5,2, kgf/cm 2 ) 2 24X27.7 Hex. 24x27.7 G/2B (PF) 82 DIA. 2 49.2,.MPa (2,kgf/cm 2 ) 24 Flats G/2B (PF) 2 5,7,,5MPa (5,7,,5 kgf/cm 2 ) 42 55 G/2B (PF) 9 DIA. 2 6 G/2B (PF) 9 DIA. 2 49 -.MPa (-kgf/cm 2 ).MPa (kgf/cm 2 ) Dimensions marked with are also applied to.mpa (kgf/cm 2 ) Option Neon lamp or LED
DIMENSIONS 2.4,.6,,.5,2,MPa (4,6,,5,2,kgf/cm 2 ) Panel mounting 4 4 DIA. 7 Terminal box (2) 7 2 4 27 94 8 (9) 48 (274.5) 4 DIA. 4.5 5. 7.5 2 Flame-proof packing type () DIA. G/2B(PF) 54 5,7,MPa (5,7,kgf/cm 2 ) -.MPa (-kgf/cm 2 ) (9) (46) 2 G/2B (PF) 2 9 DIA. G/2B (PF) 42.MPa (kgf/cm 2 ) Dimensions marked with are also applied to.mpa (kgf/cm 2 ) () 2 9 DIA. G/2B(PF).,.2,.MPa (,2,kgf/cm 2 ) 4 2B pipe mounting (62) (2) 7 (2.5) 4 4 27 94 8 (48) 2 DIA. (2) 4.5 7.5 7 5. (6) 27 G/2B (PF) 2B pipe.75 M8 (98)
EXPLOSION-PROTECTED CONSTRUCTION Type approval for explosion-proof: () It acquires a technical standard adjusted in international standard IEC by the ministry of Labor notification and the national authorization on the basis of new explosion proof guide. Type name Type approval number No.C24 Explosion-protected construction: Explosion protected-construction is a totally enclosed construction such that even if the explosive gas explodes inside the container, the container withstands the force of the explosion and there is no danger of ignition of external explosive gases. As for our pressure switch produced based on this policy, use can have combustible gases or steam of combustibility liquid in pressure measurement at a place with existing fear in a factory, other business office. Exd II+H2 T4 : Ex d II B+H2 T4 Temperature class II B+H2:Hydrogen gas is also contains in II B group A sign of explosion proof construction Group classification A kind of explosion proof electrical instrument and apparatus is classed in group I and group II by a place to be used. belongs to group II, and comes under machinery using it in a factory except hazardous location of the mine or hazardous location of business office. Applicable group and classification of gas or steam. Classification of gas or steam Applicable group A II A II B IIC B C IIB IIC IIC Ignition point of gas or steam which T4 can apply. Ignition point of gas or steam Higher than 45g Higher than g Higher than 2g Higher than 5g Applicable temperature class T T2 T T4 T5 T6 T2 T T4 T5 T6 T T4 T5 T6 T4 T5 T6 Higher than g Higher than 85g T5 T6 T6 Example of applicable gas or steam. Temperature class T T2 T T4 T5 T6 Group Acetone Ethanol Hexane Acetaldehyde Ammonia -butanol Carbon monoxide Butane Ethane Acetic acid IIA Ethyl acetate Toluene Propane Benzene Methanol Methane IIB IIC Hydrogen Ethylene Ethylenoxide Acetylene Ethylmethyl Ether Carbon bisulfide Nitric acid ethyl
WIRING CB SW SW INC. DEC. Terminal division a : b : c : a c b Terminal INC. DEC. COM Ṅ.C. Terminal 2SW (D.P.D.T.) INC. DEC. Terminal division a.2a : b.2b : c.2c : a c b 2a 2c 2b Terminal 2SW(D.P.D.T.) INC. DEC. 2 2 2 Terminal OUTLET FOR ELECTRIC WIRE Conduit Connection Packing inner DIA.(d) Applicable cable Out DIA. Protecting tube Connection PF/2 8 DIA.~2 DIA. mm step 7. DIA.~2. DIA..5mm step PF/2 PF/4 DIA.~6 DIA. mm step 2. DIA.~6. DIA..5mm step PF/4 Terminal box PF 7 DIA.~2 DIA. mm step 6. DIA.~2. DIA..5mm step PF Washer Ring packing ME set screw Cable gland Cable clamp Cable protecting tube connection Applicable cable out DIA.
Type No. constitution Please specify Type No.,each specification and range when ordering. Note:For this Model,there is no applicable item for the figures X,but please specify X when ordering. Pressure switch C B Type No. Selection spec. Additional spec. (Option) 2 4 5 6 7 8 9 2 4 5 2 Other additional spec. Switch Single setting S.P.D.T. Single setting direct current use S.P.D.T. 2 Single setting dual circuit D.P.D.T. 2 Connection 4 7 9 X G/8B G/2B Rc /4 Rc /2 /4NPT female Please specify your requirement For nuclear power plant, bracket, case finishing For range.mpa or less, bracket is equipped as standard. Operation lamp 5 With LED(24V DC) With neon lamp(v AC) With neon lamp(22v AC) 9 Terminal box W/Check terminal 8 Treatment Wetted parts material Socket:6st.st.,Bellows:6Lst.st. 2 Use no oil Use no water Use no oil & water 7 Outlet for electric wire 4 (MPa) (When ordering, please specify pressure range & unit.) -. ~ 2. ~.,.2 ~.2,. ~..4 ~.4,.6 ~.6,. ~.5 ~.5,.2 ~ 2,. ~ 4.5 ~ 5,.7 ~ 7, ~,.5 ~ 5 2 Conduit PF/2 female 6 Switch Standard Standard + gold plated 5 Document 5 Type of contact H:Upper limit type with one contact 2 L:Lower limit type with one contact 4 2H:Upper limit type with two contact 5 2L:Lower limit type with two contact Please specify your requirement Drawing one sheet, Instruction manual, Inspection procedure, Mill sheet, Test report Appoint old model model in case of hope extra.
I Type No. constitution Please specify Type No.,each specification and range when ordering. Note:For this Model,there is no applicable item for the figures X,but please specify X when ordering. Pressure switch Type No. Selection spec. Additional spec.(option) 2 4 5 6 7 8 9 2 4 5 Mounting type Panel mounting, Flame-proof packing type 7 2B pipe mounting, Flame-proof packing type 2 Connection 4 7 9 M X G/8B G/2B Rc /4 Rc /2 /2NPT /4NPT female 8 Treatment 2 9 Other additional spec. Please specify your requirement Case finishing Use no oil Use no water Use no oil & water Switch 2 4 (MPa) (When ordering, please specify pressure range & unit.) -. ~ Single setting (S.P.D.T.) Single setting direct current use (S.P.D.T.) Single setting dual circuit (D.P.D.T.) 2. ~,.2 ~.2,. ~..4 ~.4,.6 ~.6,. ~,.5 ~.5,.2 ~ 2,. ~ 4.5 ~ 5,.7 ~ 7, ~ 7 Outlet for electric wire Packing inner DIA.mm (PF/2 female) 4 Packing inner DIA.2mm (PF/2 female) 6 Packing inner DIA.4mm (PF/4 female) 8 Packing inner DIA.6mm (PF/4 female) A Packing inner DIA.7mm (PF female) Since the inside diameter of the packing can be manufactured in -mm step, please consult us for other cases. 5 Document 5 Type of contact H :Upper limit type with one contact 2 L :Lower limit type with one contact 4 2H:Upper limit type with two contact 5 2L:Lower limit type with two contact 6 Switch Standard Standard + gold plated Please specify your requirement Drawing one sheet, Instruction manual, Inspection procedure, Mill sheet, Test report The contents in the catalogue are subject to change without notice. Q u a ISO 9 NA GA NO l i t y S KE t y s I K e m UEDA FACTORY (JQA-794) MARUKO FACTORY (JQA-789) HEAD OFFICE & OVERSEAS : --4, HIGASHIMAGOME OHTA-KU, TOKYO, JAPAN. TELEPHONE : (776) 528 SALES DEPT FAX TELEX : (776) 5447 : 2468452 NKSTKY J OVERSEAS PLANTS OR AFFILIATES: U.S.A., KOREA, GERMANY OVERSEAS SALES NETWORK: AUSTRALIA, HONG KONG, INDONESIA, KOREA, MALAYSIA, PHILIPPINES, SINGAPORE, TAIWAN, THAILAND, U.S.A. PRINTED IN JAPAN '97.2.A