Pressure Switches GB

7/25/2019 Pressure Switches GB

1/5004/0 1Manuel de Formation - Pressostat-Thermostat

Ce document est la proprit de BOURDON SEDEME !l ne peut "tre reproduit ni communi#u $des tiers sans son autorisation e%presse et crite

&eneral points

'Their (unctions are)

To re*ulate apressure or atemperature arounda set point

To close or open anelectrical circuit on a

set point in order tos+itch on an alarms,stem ) Sa(et,(uction

positio

n

' Pressure s+itches .and temperatures+itches/ are control instrumentsand not measurin* instruments

position 0




101 Dead 2and

Re*ulation actionDead 2and

10

1

Dead 2and

3o+thresho

ld

3o+

threshold

4i*hthresh

old

4i*hthresh

old




Re*ulation actionsControl o( a pumpControl o( a

compressorPressurisationBoiler re*ulation

.+ater tan56 2urner/3i#uid le7el4eatin*

etc




101

Sa(et, action

8larm set (oro7erpass the hi*hthreshold

4i*hthreshol

d

lo+threshold




Sa(et, actionsSound alarm

3i*ht, alarmStop a machineSa7in* action

loc5in* actionetc




T,pes o( apparatus

'Pressure switches&au*e pressure thresholdDi9rential pressure

threshold.No a2solute pressure

threshold (or the time2eein*/

'Temperature switchestemperature threshold .nodi9erential temperature/




:or5in* principles

' Pressure s+itchesMechanical de7ices +ith

electrical contacts .ormicros+itches/ ) The positiono( the s+itch .Open or Close/depend on the 7alue o( the

controlled pressure

'Temperature s+itches!ndentical principle as the

pressure s+itche 2ut thisde7ice include a *a< e%pansiontemperature sensin* element




&ENER83 PR!NC!P3ES

!ncreasin* pressure

detection

:hen pressure P - 8pplied in 2ello+ S -reach the setted threshold ad=usted 2,the user +ith the t+o sprin*s R and R>6 le

micros+ith M *oes (rom position toposition ?

pressure > applied streinght by R +R

?

Micros+itch

M

P

RR>

s

0

F




Decreasin* pressure

detection

:hen pressure P - 8pplied in 2ello+ S- reach the setted threshold ad=usted 2,the user +ith the t+o sprin*s R and R>6 le

micros+ith M *oes (rom position ? toposition

pressure applied streinght by R +R

?

Micros+itch

M

P

RR>

s

0

&ENER83 PR!NC!P3ES




M!CROS:!TC4

!t is the mecanical inter (ace +hich

allo+s to control an electrical circuit ont+o positions ) ON or OFF

Se7eral models o( micros+itchesare a7aila2le accordin* the

automatism or the (uction to 2edone

1 2 3

State @ set point )close 0-State @ set point )open 0-?

State A set point )open 0-State A setpoint )close 0-?

P or T

increase




M!CROS:!TC4ES:irin* dia*ram

1 2 3

P or Tincrease

Toapplicaton

!nternal +irin*done 2,BourdonSedeme

:irin* done onsite 2,customer

NC

NO




DE8D B8ND

FOR 8 PRESSURE S:!TC4 ORTEMPS:!TC46 !T is thedi9erence 2et+een the

s+itchin*-on o( themicros+itch durin* increasean the s+itchin*-o9 durin*decrease o( the 7aria2le

unit.P or T/




DE8DB8ND TPES

The, are t+o dead2and t,pes )

% dead2and ) !t is an intrinsiccharacteristic o( the micros+itchWarning! Some models of

microswitches are only availablewith xed deadband

Utili/Warning! Some models ofmicroswitches are only available

with adjustable deadband

Utili




SET PO!NT

The set point is represented 2,

the scale *raduation o( pressures+itch or Temps+itch

The dead2and is ne7er *ured+ith the unit on the scale

Set pointinde% e.scale+ith unit)C

et F/

Dead2and

inde%) nounit*ured




The set point limits are %ed 2et+een and G deFull scale o( the apparatus

The lo+ 7alue is dened 2ecause)' the minimum sensiti7it, ) :e must +arrant, the reset+hen the 7alue .P or T/ decrease' 8ccurac, and repeta2ilit, under this 7alue

The hi*h 7alue G is dened 2ecause)' The li(e time o( the apparatus' To appl, a certain sa(et, coeHcient

Not allo+edIONE

NOT allo+edIONE

JKL

?0

G

!DE83:OR!N& IONE

3

!

M

!

T

E

S

4!&4 3!M!T

3O:3!M!T

Optimum usin*limits6

3o+ 7alue ) o( (ull scale4i*h 7alue ) G o( (ull scale




RE&U38T!ON !NTER183Some rules to memori




J

K

L

?

0

G

:or5in* EM6 so) m2arma%imum

OPT!M83 US!N&




F!ED DE8DB8ND8PP8R8TUS

The %ed dead2and apparatus can2e6 on re#uest6

:ith set point ad=usted +ith 7aria2leDECRE8S!N&

OR

:ith set point ad=usted +ith 7aria2le!NCRE8S!N&

:ithout customer re#uest BOURDONSEDEME apparatus are al+a,s deli7er+ith set point ad=usted +ith 7aria2ledecreasin*




Decreasin* pressure ad=ustment . standard/

Temps

pressure

P

0 8larmthreshold

0

?

0

?

0

?

8larm reset

E Dead2an

:ith % dead2and6 ad=usted (or pressure *oin*do+n6 The reset is al+a,s happenin* (or apressure upper than set point pressure )

Set point P

P0.reset pressure/ P.set point/ E .dead 2and/

Fi% dead2andthreshold sur7e,




Onl, on re#uest ) !ncreasin* pressuread=ustment

Time

Pressure

Set pointP

Seuil d>alarme

0

?

0

?

0

?

8larm reset

E dead2and

Fi% dead 2and6 Pressure s+itches ad=usted +ithpressure increasin*6 the reset al+a,s happend at apressure lo+er than the set point )

P0

P0.reset/ P.set point/ - E .dead2and/





E%emple ) RPP8 L0FS $ 0 m2ar

Set point m2ardead2and ? m2ar.micros+ith caracteristic/

S+itchin* on and s+itchin* o9 +ith apparatus o(+hich the set point is ad=usted +ith pressure

decreasin*

0

m2ar

Pressureincreasin*

Pressuredecreasin*

?

Dead2and ? m2ar82o7e set point

0

?00

??

0

?

00

??

0

?

0

?





E%emple d >un RPP8 L0EM $ 0

m2ar Consi*ne $ m2arVcart ? m2a.dpend du microrupteur/

0

GJm2ar

Pressure

decreasin*

Pressureincreasin*

Dead2and ?

m2arBelo+ the set point

0

?

00

??0

?

00

??

0

?

0

?


S+itchin* on and s+itchin* o9 +ith apparatus o(+hich the set point is ad=usted +ith pressure

increasin*




ressure s+ tc es+ith ad=usta2le dead

2and

Because o( theirmechanical desi*n

the ad=usta2le dead2and Q apparatus6

al+a,s ha7e the set

point ad=usted +ithdecreasin* pressure6the dead 2and is

conse#uentl, upper

than this set point




Tem

ps

Press

ure Re*ulationthreshold

8larmreset

E dead2and

etoint C

!n accordance +ith the principle o+ei*htin* machine6 The set point iad=usted at the lo+ threshold.lo+pressure/ .Sprin* R strein*ht onl,/ andthe hi*h threshold at the hi*h pressur+hich is the ad=usta2le dead 2and.Sprin* RR> strein*ht/The dead 2and is al+a,s a2o7e theset point

The set point C is not modied 2,the dead2and ad=ustment

Re*ulationthreshold

0

?0

?0

?0

?

Pressure s+itches +ithad=usta2le dead 2and




Dead2and al+a,s a2o7e the

set pointE%emple ) RPP8 L0EM $ 0 m2arThreshold) L m2ar6 ad=usted +ith pressurdecreasin* - ad=usta2le dead2and 2et+een and m2ar

E%emple) one threshold+ith ad=usta2le dead2and

'Set point compulsoril, ad=usted at) L m2ar'Dead2and accordin* re*ulation needed'E%emple +ith dead2and ad=usted at 0 m2ar

0

L

m2ar

increase

decrease

J

dead2and0 m2ar

0

?0

?

00 ??

0

?

0

?

00

??




Dr, contacts andMicroswitchs

(rence 8mps1ac Dnition Dia*ram

8 .S!/ L00 chan*e-o7erWnormal useW 4i*h po+er cuttin*

E .&S/ 000chan*e-o7erhi*h sensiti7it,

Used +hen chan*e-o7er is 7er, close o( the set

oint.thin dead2and/W Used in normal athmosphereW Not recommande in re*ulation

Red +hite

Blue

Red +hite

Blue




(rence 8mps1ac Dnition dia*ramC .S4/ 06L00 sealed

chan*e-o7er

W(or humid and corrosi7e athmosphereW Nuclear sa(et, s,stems

B .S!!/ 0% L000 simultaneous chan*e-o7er

W 0 !S micros+itchesW Control o(d t+o separate circuits

Red :hite

Blue

Red :hite

Blue

Red :hite

Blue





(rence 8mps1ac Dnition Dia*ram& .S8M/ 0% 000 0 chan*e-o7er

s+itches +ith shi(tandhi*h sensiti7it,

0 micros+itches &S +ith shi(ted chan*e-o7erW Sa(et, (onction +ith prior alarm and alarm

.&SS/ 0% 000 0 t+o simultaneouschan*e-o7erhi*h sensiti7it,

W 0 micros+itches &SW Cotrol t+o separate circuits

Red :hite

Blue

Red :hite

Blue

Red :hite

Blue

Red :hite

Blue





(rence 81ac Dnition Schma: .S44/ 0% 06L00 t+omultaneous

sealedchan*e-o7er

W0 micros+itches S4+ith simultaneous chan*e-o7er

W control t+o di9erentselectrical circuits

.SRC/ L00

chan*e-o7er s+itchmanual reset a(tercommutation +ithpressure decreasin*

W Sa(et, (onction to o2li*e the

operator to *o on site to reset the s,stem

Red :hite

Blue

Red :hite

Blue

Red:hite

Blue

R





(rence 81ac Dnition Schma

X .SRF/ L00 chan*e-o7er s+itchmanual reset a(tercommutation +ithpressure decreasin*

W Sa(et, (onction to o2li*e theoperator to *o on site to reset the s,stem

D .&S4 W/4i*h sensiti7it, and sealed micros+itch W Thin dead2and corrosi7e athmosphere

&S44 W same use as &S4 +ith t+o simultaneoushan*e-o7er s+itchesor t+o di9erent electrical circuits

Red:hite

BlueR





Micros+itches +ith simultaneouschan*e-o7er and e%plosion proo(

7ersion

Micros+itches can 2e supplied +itht+o simultaneous chan*e-o7er

!n (ollo+in* cases) S!! .0%S!/6 &SS.0%&S/6 S44 .0%S4/6 &S44 .0%&S4/

!n this case the dead2and are multplied2, L

!t is the same (or the use +ith e%plosionproo( 2o%




S8M Micros+itch

Fonction )Pressure s+itch or temps+ich

e#uiped +ith a .S8M/micros+ith is a2le toauthauri




RP2 Mechanicalprinciple

Pressure

Sprin*

8d=ustment scre+.1R/

Scale

Micros+itch

M

Thrust

scre+.1B/

Deadband adjustmentinside swich(if any)




T,pe o( control *au*e pressure compound pressure di9erential pressure

T,pe o( dead2and %

ad=usta2le

T,pe o( contact 4i*h sensiti7it, sealed Simultaneous or shi(ted Manual reset

pneumatic

Num2er o( contact.s/

Po+er cut

Main Characteristics




Ro2ust and +aterproo( .!PKL/ ) Firstcharacteristic as5ed to a pressures+itch

or thermos+itchChoice o( +et material ) accordin*application.normal or corrosi7e process/

1arious t,pe o( micros+itches)corrosi7e atmosphYree%plosi7e atmosphYreDust, atmosphYre:et atmosphYre

O7erpressure

Rptiti7it, ) Z o( (ull scale .&S/ etZ 0 .other models/

1arious options ) 4,draulic ttin*s6

chemical seals mountin*6 tropicalisatione%plosion-proo(6 !S6 pour des Specicapplications .Nuclear6 marine6 [/

Strein*ht points RPP - RTT




Strein*th points RP0

!ntrinsic sa(et, 7ersion

E%plosion proo( 7ersionSa(et, applicationsCompact desi*nSensin* element ino% ?K3

micros+iches:heel to ad=ust set point:heel on micros+itch to ad=ustdead2andO7erpressure .(rom 0 to L

time the (ull scale/&ood resistance a*ainst7i2rations




4O: TO DEF!NE 8PRESSURE S:!TC4

Use the *uide to nd the (amil,

Dene the micros+itch accordin* sertpoints and deaed2and needed

Then chec5)

Po+etr cut o( micros+itch4,draulic ttin*

>en7ironnement compati2ilit,

accessoiries .siphon6 7al7e6 seal6pressure limitor6 etc[/

options .7oir data sheet/

CaseStandard

E%plosion proo(




4,draulic ttin*

En7ironnement8m2iant temperatureminimum and ma%imumtemprature o( \uid

Full scale*au*e .P/ or Di9erential pressure

.P/P ma%imum or Pma%imum and minimum s#taticpressureStatic pressure 7ariation ) yes orno

!( ,es ) maximum - minimum

values1ariation (re uencies

4O: TO DEF!NE 8PRESSURE S:!TC4




Electrical contacts .Dead2and % 6L pour 8DF/

chan*e-o7er s+itch

0 Simultaneous chan*e-o7er s+itches0 Shi(ted chan*e-o7er s+itches

Note : lease see data sheet for comatibilitybetwwen and ower cut

Versions Thresholdadjustment

standard .i( as5ed 2, customer

hi*h sensiti7it,

sealed Fi deadbandhi*h sensiti7it, and sealed Set pointpressure decreasin*

manual reset minimum Set point pressureincreasin*

manual reset ma%imum

*olden contacts !djustabledeadband

ma%imum pressureincreasin*

To dene a pressures+itch




To dene a pressures+itch

8ccessoriessiphon

Chemical seal

1al7e

Pressure limitor

others

OptionsSee technical sheet




EEMP3E OF 8PP3!C8T!ON

First applicatio

Fillin* up a tan5 +ith a pump Run this pump

2et+een pressure o( 60 and 6L 2ar +hichrepresent a hei*ht o( +ater in an open tan5

60 2ar minimum le7el 0 mYters6L 2ar ma%imum le7el L mYtres

8ction

Start the pump +hen pressure is lo+er than02ar Stop the pump +hen pressure is hi*her thanL2ar

:hich product should +e propose 5no+in* thatMa%imum pressur to control 6L 2ar .Lm2ar/

No other pressure in the tan5no corrosion:ater temprature 0CNo other re#uest (rom customer 6 e%ept)ttin*& 0] m^le





Choice o( product application n

RPPN Code 0? - FU33 SC83E ) 6L $ 2ar

Set point +ith pressure decreasin*

Set point 60 2ar6 .lo+er than Lo( FS/

Set point A FS -accordin*manu(acturer recommandation

Standard micros+itch 8 .S!/ )ad=usta2le dead2and possi2le 2et+een0 to m2ar

:e can o9er

RPPN 8 8 ? 0?+ith set point 0 m2ar and dead2and)? m2ar .threshold hi*h 606?6L/





8pplication n0

To control the drop in pressure on anair lter +ith a line pressure 6 2ar

The lter must 2e cleaned +hen thedi9ereno( pressure 2et+een upstreamand do+nstream is ? m2ar

The customer +ants an alarm +henthis 7alue is reachedto c5no+ +hen toclean the lter

:hich product should +e propose5no+in* that)

:e must control the di9erantial

pressure 2et+een upstream anddo+nstream to detect +han the lterhas to 2e cleaned

Upstream and do+nstream ttin*s 0NPT m^le




EEMP3E DE DEF!N!T!ON

Choice o( product n0

Di9erential pressure s+itch connectedupstream and do+nstream o( the lter

The RDDP Code LJ is accepta2le

2ecause it t +ith ser7ice conditions to m2ar P +ith a static pressure o( 2ar ma%imum

it is a sur7e, action 6 +e don >t need

ad=usta2le dead2and :e choose a %dead2and micros+itch E .&S/ +ithchan*e-o7er and hi*h sensiti7it,

:e can o9er

RDDP E 8 K LJ




XO4NSON CONTRO3S - PENN - US8'TE3EMEC8N!_UE - France

UN!TED E3ECTR!CS .UE/ - US8'

BURERT - &erman,

D8NFOSS - 8llema*ne

&EOR&!N - France

Competition




8pplication areas

83ST4OM

CE&E3EC8TOC4EMSt &OB8!NS8C!3ORR4`NEPOU3ENC8SERSBER&DE D!ETR!C4SO318

M!C4E3!NDE&REMONTTNNESOFRE&8I8RXO :!&&!NS

EDF-&DFC3EMESSC!B8 &E!&S8CMetc6 etc[

Facilities constructors

4ea7, industr, and lar*eassem2lies

Production unitsChemicals6Su*ar6(ertili




8PP3!C8T!ONS RPP-RTT

'&a< e%pansion circuits Upstream pressure

Di9rential pressureupstreamdo+nstream

'ProductionDistri2ution o( *a< Net+or5 sur7e,Mi% air*a< sur7e,

'Po+er plants Electronuclear po+erplants

4,draulic po+er plantsThermal po+er stations

'Mtallur*, no





':ater treatment deminerali





'Oil industr, 2oilersd*aserdistillation

crac5in*pompin*stora*eDrillin* mud4,draulic

automatisms


50/50

8PP3!C8T!ONS RP0

'3u2ricatin* circuits lu2ricatin* circuito( rotatin* machines

'4,draulic automatism h,draulic =ac5 controlpump control and sur7e,

'4eat e%chan*er upstream and do+nstreamcontrol

primar, and secondar,circuit cotrol

'Test 2enches h,draulic circuitspneumatic circuitspumps and =ac5

'4eat e%chan*er +ater le7el

+ater tur2ine control

'Fire e%tin*uisher circuit (eedin* net+or5 )

Documents

Pressure Switches GB