6721-40 HERGA, 6721-40 Datasheet

VACUUM SWITCH

6721-40

Manufacturer Part Number
6721-40
Description
VACUUM SWITCH
Manufacturer
HERGA
Datasheet

Specifications of 6721-40

Connection Size
4mm
Contact Configuration
SPCO
Contact Current @ Contact Voltage Ac Min
21A
Contact Current Ac Max
21A
Contact Voltage Ac Max
250V
External Diameter
43mm
External Length / Height
38mm
a Pressure & Vacuum Switches
S W I T C H I N G A N D S E N S I N G S O L U T I O N S

Related parts for 6721-40

6721-40 Summary of contents

Page 1

... Pressure & Vacuum Switches ...

Page 2

... Our distributor network covering the worlds major markets enables technical help and assistance to be just a phone call away. Herga’s approval to ISO 9002 ensures that we are fully in control of our quality. However, this is just the starting point for an aspiring World Class company. ...

Page 3

... Low Air Pressure/Vacuum Switches Small versatile compact differential switch with low contact inertia for rapid switching (range 2.5 mbar to 40 mbar). 6721 and 6722 Vacuum Switches Constructed in Nylon 12 material (vacuum range -0.0075 Bar to -0.670 Bar). Single or double pole in 5 adjustable switch ranges. UL versions available. ...

Page 4

... A Herga individually packed in plain carton B Herga vacuum form tray (for quantities 10+) 1999 FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112 As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale. ...

Page 5

... Herga do not accept liability for any pressure operated device used outside the pressure range specified by the company. Note: differentials are approximate = Suitable with modifications ...

Page 6

... FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112 As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale. Gold contacts available Other pressures available PSI Multiple cap and spout options available 6773 ...

Page 7

... Vacuum and Pressure Switch Range A miniature, compact low pressure switch designed for direct fitting by solder pins to printed circuit boards. Both vacuum and pressure ports are provided making the unit ideal for differential switching. Typical applications are indicators, emergency cut-out and alarms, filter and low pressure/vacuum monitoring ...

Page 8

... Approvals Available: CE, BEAB, CSA, DEMCO, IMQ, KEMA, NEMCO, OVE, SEMCO, SET I, SEV, UL, VDE NB Herga do not accept liability for any pressure operated device used outside the pressure range specified by the company. 1999 FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112 As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale. ...

Page 9

... Medium Pressure Switches Suitability for use with different operating media Pressure Medium 6742/20/30/40 Chemical Compatibility Acetone Ammonia (Liquid) Amyl Alcohol to 20˚C Automotive Brake Fluid Beer Benzyl Alcohol Butane Carbon Dioxide - Dry Citric Acid Copper Sulphate (Sol.) Compressed Air ...

Page 10

... Note: Dry Switching If switching low power circuits, low current (4 to 100 milliamperes) and low voltage (below 30V), consult herga for special switches Herga do not accept liability for any pressure operated device used outside the pressure range specified by the company. 1999 FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112 As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication ...

Page 11

... Low Pressure Switches Suitability for use with different operating media Pressure Medium Chemical Compatibility Acetone Ammonia (Liquid) Amyl Alcohol to 20˚C Automotive Brake Fluid Beer Benzyl Alcohol Butane Carbon Dioxide - Dry Citric Acid Copper Sulphate (Sol.) Compressed Air Cutting Oil ...

Page 12

... Operation A Normally Open - Pressure B Normally Closed - Vacuum 3. Bleed Adjuster Options A Bleed A side only, Vacuum N/O to N/C, Pressure N/C to N/O B Bleed B side only, Vacuum N/O to N/C, Pressure N/C to N/O C Bleed both sides Vacuum / Pressure D No bleed variant either side Vacuum / Pressure 4. Bleed Setting ...

Page 13

... This means that it can operate at a high cycle rate with low pressure, vacuum or pressure differential. This design feature can be used when measuring pressure pulses such as on component counting applications and used with herga Safe Edges ...

Page 14

... Side entry spout 4mm O/D 6721-20 ± 10% std 6721-30 -5˚ 70˚C 6721-40 Nylon 12 Special options are available for quantity orders Switches set to specific operating vacuum, rising or falling Neoprene Diaphragms in silicon rubber, nitrile, EPDM 1) 1) Switches with wide or close differentials ...

Page 15

... As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale -30 WG 6721 mm -400 -350 -225 -200 -175 -150 -125 -100 -75 6721-40 Alternative Vacuum Connections Back entry 1 ” BSPT and NPT Connectors / 8 -40 -30 -20 -10 0 ...

Page 16

... Pressure Conversion Table 2 P.S.I in/H 0 in/Hg mm/H 0 mm/Hg kg/ 1.0 27.71 2.036 703.1 51.75 .0703 1.1 30.45 2.240 773.4 56.89 .0773 1.2 33.22 2.443 843.7 62.06 .0844 1.3 35.98 2.647 914.0 67.23 .0914 1.4 38.75 2.850 984.3 72.40 .0984 1.5 41.52 3.054 1055 77 ...

Page 17

Certification Markings Country Agency Australia SAA Austria OVE Belgium CEBEC Canada CSA Denmark DEMKO Europe MANY Finland FEI France UTE Germany VDE India ISI Ireland IIRS Italy IMQ 1999 FOR FURTHER INFORMATION TEL: +44 (0)1284 701422 FAX: +44 (0)1284 753112 ...

Page 18

... Please contact us with your specific requirements . Part Number: 6819-01 Blue flexible PVC protective boot for air and pressure switch types 6721, 6731, 6741, 6861, 6863 and 6869. Covers all electrical connections and grips round outside of switch body. ...

Page 19

... REQUIREMENTS: __________________ PRESSURE. __________________ VACUUM. _________________ DIFFERENTIAL PRESSURE. IF PRESSURE OR VACUUM MEASURED GAUGE (AS IN CATALOGUE) OR ABSOLUTE? ___________________________________________ ________________ INCHES WG _________________ PSI GAUGE HERGA TO SET WE WILL SET MAX PRESSURE/VACUUM UNIT WILL BE SUBJECTED TO ___________________________ SETTING PREFERENCE ±__________________ MAX DIFFERENTIAL (DIFF. BETWEEN RISE & FALL) ________________________________ MIN DIFFERENTIAL _______________________ ...

Page 20

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