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krom schroeder DG B Series, Technical Information

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DG · Edition 08.13

 

24

 

                  

บริษัท เอดีดี เฟอร์เนส จ ำกัด

 

                                 ADD FURNACE CO.,LTD.

 

                                                44 ซอยบรมราชชนนี

 

  70 ถนนบรมรำชชนนี แขวงศำลำธรรมสพน์ เขตทวีวัฒนำ กรุงเทพฯ 10170

 

                                               

โทร

: 02-888-3472  

โทร

:

 

ออกแบ

บ

:

08-08-170-170 

  

แฟกซ์

: 02-888-3258 

 

 

                                               https://www.add-furnace.com   E-mail: 

[email protected]

 

 

Technical data

 

7 .2  Safety-specific characteristic values for DG 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Safe failure fraction SFF                > 90% 
Fraction of undetected com- 
mon cause failures β                        ≥ 2% 
Max. service life under operating conditions: 10 years after 
date of production, plus max. 1/2 year in stor age prior to first 
use, or once the given number of operating cycles has been 
reached, depending on which is achieved first.The pressure 
switches are suitable for single-channel systems (HFT = 0) up to 
SIL 2/PL d, and up to SIL 3/PL e when two re-dundant pressure 
switches are installed in a double-channel architecture (HFT = 
1), provided that the complete system com-plies with the 
requirements of EN 61508/ISO 13849.For a glossary of terms, 
see page 27 (Glossary). 

 
 
 

 

 

Summary of Contents for DG B Series

Page 1: ...essures positive negative and differential pressures EC type tested and certified pursuant to EN 1854 and class S DG T FM approved and UL listed Certified pursuant to GOST R and AGA Certified for systems up to SIL 3 and PL e Pressure switch with internal lock and manual reset Suitable for biologically produced methane can be used on pipes with Zone 2 explosive atmospheres without isolating amplifi...

Page 2: ... 1 21 and 2 22 hazardous areas 12 3 7 DG on pipes with Zone 2 22 explosive atmospheres 13 3 8 Animation 14 4 Selection 15 4 1 Selection table 15 4 2 Type code 16 5 Project planning information 17 5 1 Installation 17 6 Accessories 19 6 1 Fastening set with screws U shape bracket 19 6 2 Connecting set 19 6 3 External adjustment 19 6 4 Pressure equalization element 19 6 5 Restrictor orifice 20 6 6 Te...

Page 3: ...s on various industrial gas and air appliances such as boiler fan monitor ing and differential pressure monitoring in firing ventilation and air conditioning systems The TÜV tested special design pressure switch is used as defined by VdTÜV Code of Practice Druck 100 1 Pressure 100 1 in firing installations for steam and hot water generators in accordance with TRD 604 Para 3 6 4 as well as class S ...

Page 4: ...ples of application 1 1 1 Gas deficiency monitoring For monitoring the minimum gas inlet pressure 1 1 2 Differential pressure monitoring Differential pressure switch for monitoring air filters 1 1 3 Systems leak tightness check Electronic safety shut off valve SAV with closed position check of downstream devices 1 1 4 Negative pressure monitoring Monitoring the negative pressure ensures the correc...

Page 5: ...ay be monitored as follows The static pressure is monitored by pressure switch DG PZL as long as it can be demonstrated that the display consequently shows an adequate and secured flow of air or The pressure switch DG PDS controls the flow of air via the differential pressure on the orifice If there is no air pressure supplied or if there is no differential pressure on the orifice the system will ...

Page 6: ...rtificate DG B12185 nationales Zerti fikat Russland RUS DG T FM approval pursuant to Gas Appliances Directive 2009 142 EC in conjunction with EN 1854 Class S Meets the requirements of the Low Voltage Directive 2006 95 EC Declaration of conformity D GB see www docuthek com Elster Kromschröder Kromschröder LBE Products 04 Pressure switches Pressure switches for gas DG Kind of document Certificate DG...

Page 7: ... จำกัด ADD FURNACE CO LTD 44 ซอยบรมราชชนนี 70 ถนนบรมรำชชนนี แขวงศำลำธรรมสพน เขตทวีวัฒนำ กรุงเทพฯ 10170 โทร 02 888 3472 โทร ออกแบบ 08 08 170 170 แฟกซ 02 888 3258 https www add furnace com E mail sales add furnace com Certification 2 1 Overview ...

Page 8: ... is measured in the upper diaphragm chamber port 3 or 4 and on DG T via port 4 The lower diaphragm chamber is ventilated via port 1 or 2 In the case of DG I the negative pressure gas air flue gas or biologically produced methane is measured in the lower diaphragm chamber port 1 or 2 The upper diaphragm cham ber is ventilated via port 3 or 4 3 3 Differential pressure measurement Differential pressu...

Page 9: ...l DG models except DG N switch with rising pressure The contact switches from NC 1 to NO 2 DG N switches with falling pressure The contact switches from NO 2 to NC 1 DG H and DG N are locked off in their switched state and can only be unlocked with a manual reset 3 4 1 Blue pilot lamp for 230 V AC or for 120 V AC 3 4 3 Red green pilot LED for 24 V DC AC or for 230 V AC 3 4 4 Pilot LED with plug L ...

Page 10: ...il DG 18I DG 120I DG 450I Contacts 3 and 2 close when subject to increasing nega tive pressure Contacts 1 and 3 close when subject to falling negative pressure DG 1 5I and DG 12I The connection of DG 1 5l and DG 12l depends on the positive or negative adjusting range In the case of high humidity or aggressive gas components H2S we recommend using a pressure switch with gold con tact due to its hig...

Page 11: ...9 11 2007 corresponds to the Temperature class T6 Group II The internal inductance capacitance is Lo 0 2 µH Co 8 pF The isolating amplifier transfers the DG s signals from the explosion hazard area to the safe area Depending on the de sign of the intrinsically safe circuit the explosion hazard area canbemonitoredforcablefaults cablebreaksorshort circuits Ensure that standard compliant wiring pursu...

Page 12: ... 22 explosive gases or dust are present without an isolating amplifier The connection to Zone 2 Zone 22 must be implemented via one of the two threads Even in the unlikely event of a break in the diaphragm there is no danger of flashback into the sys tem The pressure compensation holes on the pressure switch connections have a defined ignition protection in terms of the safety measure for enclosed...

Page 13: ... of the gas pres sure switch DG Click on the picture The animation can be controlled using the control bar at the bottom of the window as on a DVD player Toplay the animation you will need Adobe Reader 7 or a newer version If you do not have Adobe Reader on your system you can download it from the Internet Go to www adobe com click on Adobe Reader in the Down load section and follow the instructio...

Page 14: ...นี 70 ถนนบรมรำชชนนี แขวงศำลำธรรมสพน เขตทวีวัฒนำ กรุงเทพฯ 10170 โทร 02 888 3472 โทร ออกแบบ 08 08 170 170 แฟกซ 02 888 3258 https www add furnace com E mail sales add furnace com On DG T the blue pilot lamp for 120 V AC is fitted On DG TG the red green pilot LED for 24 V DC AC is fitted ...

Page 15: ...ure adjusting range 10 to 120 mbar Adjusting range 30 to 150 mbar Adjusting range 50to400 mbar Negative pressure adjusting range 80to 450 mbar Adjusting range 100 to 500 mbar Positive pressure Positive pressure negative pressure differential pressure Locks off with rising pressure Locks off with falling pressure Negative pressure for gas Positive pressure only for oxygen and ammonia port 1 1 4 NPT...

Page 16: ...of IIR Do not use for fuel gases diaphragm not resist ant In the case of oxygen ensure grease free installation Continuous operation at high temperatures e g maximum ambient temperature accelerates the ageing of elastomer materials and reduces the service life please contact manu facturer Ozone concentrations exceeding 200 µg m or gases containing more than 0 1 by vol H2S accelerate the ageing of ...

Page 17: ...add furnace com E mail sales add furnace com Project planning information Installation When installing outdoors place the DL in a roofed area and protect from direct sunlight even IP 65 version To avoid con densation the cover with pressure equalization element can be used see page 19 Pressure equalization element In case of highly fluctuating pressures install a restrictor orifice see page 20 Res...

Page 18: ...nd DG I can be retrofitted Order No 74916155 For DG B DG U DG I Order No 74915387 6 2 Connecting set DG U DG H DG N DG I 6 4 Pressure equalization element For monitoring a minimum and maximum inlet pressure pu with two pressure switches attached to one another Order No 74912250 To avoid the formation of condensation the cover with pres sure equalization element can be used The diaphragm in the scr...

Page 19: ...tals Hole diameter 2 mm Order No 75456321 hole diameter 3 mm Order No 75441317 6 6 Test key PIA To test the min pressure switch the DG can be vented in its switched state using the PIA test key contains non ferrous metals Order No 74329466 6 7 Filter pad set To protect the electrical contacts in the DG from dirt particles in the surrounding air or in the medium use a filter pad at the 1 8 negative...

Page 20: ...s www add furnace com E mail sales add furnace com 1 2 3 4 1 2 3 4 Accessories 6 11 Pilot lamp set red or blue Pilot lamp red 110 120 V AC I 1 2 mA Order No 74920430 220 250 V AC I 0 6 mA Order No 74920429 Pilot lamp blue 110 120 V AC I 1 2 mA Order No 74916121 220 250 V AC I 0 6 mA Order No 74916122 6 12 LED set red green 24 V DC I 16 mA 24 V AC I 8 mA Order No 74921089 230 V AC I 0 6 mA Order No...

Page 21: ... 1 I 0 05 A at cos 0 6 If the DG DG TG has switched a voltage 24 V 30 V and a current 0 1 A at cos 1 or 0 05 A at cos 0 6 once the gold plating on the contacts will have been burnt through It can then only be operated at this power rating or higher power rating Maximum medium and ambient temperatures DG B DG U DG I DG S 15 to 80 C 5 to 176 F DG H DG N 15 to 60 C 5 to 140 F DG T DG HT DG NT 40 to 6...

Page 22: ... WC DG 6 0 4 6 0 2 0 3 15 15 or 0 1 mbar 0 04 WC DG 10 1 10 0 39 3 9 0 25 0 4 0 1 0 16 15 15 DG 30 2 5 30 0 35 0 9 15 15 DG 50 2 5 50 1 19 5 0 8 1 5 0 31 0 59 15 15 DG 150 30 150 11 7 58 5 3 5 1 17 1 95 15 15 DG 400 50 400 5 15 15 15 DG 500 100 500 39 195 8 17 3 12 6 63 15 15 DG 10H DG 10N 1 10 0 39 3 9 0 4 1 0 16 0 39 15 15 DG 50H DG 50N 2 5 50 1 19 5 1 2 0 39 0 78 15 15 DG 150H DG 150N 30 150 11...

Page 23: ... mon cause failures β 2 Max service life under operating conditions 10 years after date of production plus max 1 2 year in stor age prior to first use or once the given number of operating cycles has been reached depending on which is achieved first The pressure switches are suitable for single channel systems HFT 0 up to SIL 2 PL d and up to SIL 3 PL e when two re dundant pressure switches are in...

Page 24: ...E mail sales add furnace com Technical data Safety specific characteristic values for DG 7 2 1 Determining the PFHD value the λD value and the MTTFd value PFHD Probability of dangerous failure HDM 1 hour PFDavg Average probability of dangerous failure on de mand LDM D Mean dangerous failure rate 1 hour MTTFd Mean time to dangerous failure hours nop Demand rate mean number of annual operations 1 ho...

Page 25: ... https www add furnace com E mail sales add furnace com Technical data 7 3 Dimensions Holes 10 mm 0 4 deep for self tapping screws 8 Maintenance cycles At least once a year twice a year in the case of biologically produced methane 13 1 0 52 70 2 76 11 0 43 Rp NPT 43 1 7 4 x ø 3 6 ø 0 14 Rp 1 8 1 8 NPT Rp 1 8 1 8 NPT M16 x 1 5 13 0 51 30 5 1 2 NPT Conduit 76 3 10 5 0 41 17 0 7 28 5 1 12 2 5 0 1 64 ...

Page 26: ...2008 9 3 Category Classification of the safety related parts of a control system in respect of their resistance to faults and their subsequent behaviour in the fault condition and which is achieved by the structural arrangement of the parts fault detection and or by their reliability from EN ISO 13849 1 2008 9 4 Common cause failure CCF Failures of different items resulting from a single event whe...

Page 27: ...es related to all failures which are as sumed to appear from EN 13611 A2 2011 9 11 Probability of dangerous failure PFHD Value describing the likelihood of dangerous failure per hour of a component for high demand mode or continuous mode Unit 1 h from EN 13611 A2 2011 9 12 Mean time to dangerous failure MTTFd Expectation of the mean time to dangerous failure from EN ISO 13849 1 2008 9 13 Demand ra...

Page 28: ...ดีดี เฟอร เนส จำกัด ADD FURNACE CO LTD 44 ซอยบรมราชชนนี 70 ถนนบรมรำชชนนี แขวงศำลำธรรมสพน เขตทวีวัฒนำ กรุงเทพฯ 10170 โทร 02 888 3472 โทร ออกแบบ 08 08 170 170 แฟกซ 02 888 3258 https www add furnace com E mail sales add furnace com ...

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