RD Standard differential pressure switches

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Austen Nichols
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R Standard differential pressure switches Pneumatics or hydraulic fluid control Power generation safety equipments Pressurized chambers control Level measurement onforms to These instruments compare

quiped with one or two snap action microswitches, they are used for controling the process cycles, or operate an alarm when pressure reaches set point value.

1 R Standard differential pressure switches Pneumatics or hydraulic fluid control Power generation safety equipments Pressurized chambers control Level measurement onforms to These instruments compare a pre-established adjustable set point to the received process pressure. quiped with one or two snap action microswitches, they are used for controling the process cycles, or operate an alarm when pressure reaches set point value. epending on options selected, adjustable differential deadband is available. Featuring possibility to adjust change on rise and change on fall limits or enabling to get rid of undesired repetitive on/off around set point. Technical ata (20 ) Operating temperature pages 2 and 3 Storage temperature From Reproductibility ± 2 % of F.S. Reading accuracy ± 5 % of full scale onform to Low Voltage irective BT 73/23/ Pressure irective P 97/23/ egree of protection IP 65, NF N Important Normal operation is between 10 % and 90 % of the selected scale. eadband values given in the table (see overleaf) are defined under these conditions. All circuits must be equipped with a safety system protecting them against excess pressure. All pulsating circuits must be fitted with pulsation dampeners. When mechanical vibrations are present, these should be reduced as much as possible by installing the pressure switches on antivibration mounts. For the switch to be correctly calibrated, the operating static pressure must be known. anufacturing over ase Wall mounting arth connection lectrical connection Pressure connection Adjustment element Blue ZAAK protected aptive screws for cover attachment Black ZAAK protected Removable bracket Internal Internal terminal block with P.. 11 cable gland for cable between 7 and 10.5 mm diameter G 1/2 or female 1/4 NPT xternal adjustment screw fitter with an antivibration system locking the set point and the deadband, protected by screwed lead seal on in option Internal mechanism of bichromate - treated cadmium-plated steel Page 45

2 Operating ranges RP - RPN - RP - RN low pressure RP : standard sensing element with treated steel flanges and diaphragm Viton. RPN : standard sensing element with (316L) stainless steel flange and Viton diaphragm. SAL ode axi static P P axi N A (tropicalized) (SI) IROSWIT (SR) (GS) (SR) At 10 % At 90 % At 10 % At 90 % At 10 % At 90 % At 10 % At 90 % INSIONS mbar mbar bar mbar mbar mbar mbar mbar mbar mbar mbar to to to to to to Fig. 1 2 to to to 30 5 to to Fig. 1 2 to to to to to Fig to to to to to Fig to to to to to Fig. 2 RP : sensing element with standing overpressures with treated steel flanges and diaphragm Viton RN : sensing element with standing overpressure with (316L) stainless steel flanges and diaphragm according to (1), (3). SAL ode axi static P P axi N A (tropicalized) (SI) IROSWTI (SR) (GS) (SR) At 10 % At 90 % At 10 % At 90 % At 10 % At 90 % At 10 % At 90 % INSIONS mbar mbar bar mbar mbar mbar mbar mbar mbar mbar mbar 2 to (3) 10 0 to to to to to Fig. 3 2 to (3) 50 0 to to to 20 5 to to Fig. 3 2 to (3) 50 0 to to to 30 5 to to Fig. 3 2 to (3) to to to to to Fig to (1) to 50 8 to to to to Fig to (1) to to to to to Fig to (1) to to to to to Fig to (1) to to to to to Fig to (1) to to to to to Fig to (1) to to to to to Fig. 5 (1) Viton diaphragm (3) Nitrile, Butyl rubber diaphragm T fluid : } RP/RPN T ambient : RP/RN These microswitches can be implemented with two simultaneous contacts : W (2x) Warning : in this case, deadbands are multiplied by 1.5 For microswitches G : consult us Page 46

3 Operating ranges RPW - RWN low pressure, RP - RPN medium pressure RPW : standard sensing element, treated steel flanges, P diaphragm not perturbed by static pressure variations. RWN : standard sensing element, (316L) stainless steel flanges and Viton diaphragm, not perturbed by static pressure variations. SAL ode axi Static P P axi N A (tropicalized)(si) IROSWIT (SR) (GS) (SR) At 10 % At 90 % At 10 % At 90 % At 10 % At 90 % At 10 % At 90 % mbar mbar bar mbar mbar mbar mbar mbar mbar mbar mbar INSIONS 10 to to to to to Fig to to to to to Fig to to to to to Fig to * to to to to Fig to * to to to to Fig to * to to to to Fig. 7 T fluid : * G 1/4 : female connection T ambient : RP : standard sensing element with brass base plate, Tombac bellow or nickel-plated piston. RPN : standard sensing element with stainless steel base plate, stainless steel bellow or nickel plated piston. SAL ode axi static P P axi IROSWIT N A (tropicalized)(si) (SR) (GS) (SR) At 10 % At 90 % At 10 % At 90 % At 10 % At 90 % At 10 % A 90 % INSIONS bar bar bar bar bar bar bar mbar mbar bar bar 0.05 to to to to to Fig to to to to to Fig to * to to Fig to 1 224* to to Fig to 4 234* to to to to Fig to to to to to Fig to to to to to Fig to to to to to Fig to to to to to Fig to ** to to 20 6 to 20 7 to Fig to ** to 20 4 to 20 6 to 20 7 to Fig to to to to to bar 15 bar Fig. 2 * Static P maxi = 30 bar for stainless steel version ** measuring element in stainless steel only T fluid : (RP) (RPN) T ambient : (all versions) These microswitches can be implemented with two simultaneous contacts : W (2x) Warning : in this case, deadbands are multiplied by 1.5 For microswitches G : consult us Page 47

able identification, current rating able identification urrent rating 1 switch 2 switches icroswitch type SPT Blue Red White Yellow-Green Blue Red White Blue Red White aune-vert A B W Standard 2

4 able identification, current rating able identification urrent rating 1 switch 2 switches icroswitch type SPT Blue Red White Yellow-Green Blue Red White Blue Red White aune-vert A B W Standard 2 simultaneaous contact ermetic 2 hermetically contact Ultra sensitive 0.1 A min.; 10 A max. 0.1 A min.; 10 A max. 5 ma min.; 4A max. 5 ma min.; 4A max. 0.2 A min.; 10A max. F 2 contacts ultra sensitive 0.2 A min.; 10A max. G 2 contacts décalables 0.2 A min.; 10A max. ermetically ultra sensitive 0.4 A min.; 10A max. 30 Vcc max. V 2 hermetically contact ultra sensitive 0.4 A min.; 10A max. 30 Vcc max. Gold contact 10 ma min.; 50 ma max. 250 Vac max. or 220 Vdc max. N Tropicalized 0,1 A min.; 10A max. 250 Vac max. or 48 Vdc max. 1 changeover switch with manual reset opening on rise 0.1 A min.; 10A max. 1 changeover switch with manual reset opening on fall 0.1 A min.; 10A max. Operating principle An element which is sensitive to a differential pressure actuates one or two microswitches via levers. The set point and the deadband are adjusted by springs. P < BP P > BP Accessories Adaptor for welded connection : in steel ZR1 or stainless steel ZRN1 Steel or s.s (AISI 316) siphon hemical seal (for code 221 to 451) Isolating valve. anifold. Pulsation dampener. Page 48

imensions (mm) Watertight case Sensing element RP / RPN / RP / RN / RPW / RWN low

2 RP / RPN - 156-157 weight : 2.8 kg Fig.

hexagonal G 1/2 mâle 1/4 NPT female G 1/2 mâle 1/4 NPT fem. G 1/2 mâle 1/4 NPT female Fig.

24/flat hexagonal 24 /flat hexagonal G 1/2 mâle 1/4 NPT female imensions (mm) RP / RPN

5 imensions (mm) Watertight case Sensing element RP / RPN / RP / RN / RPW / RWN low pressure range Fig.1 RP / RPN weight : 3 kg Fig. 2 RP / RPN weight : 2.8 kg Fig. 3 RP / RN weight : 10 kg 24 /flat hexagonal 24 /flat hexagonal 24 /flat hexagonal G 1/2 mâle 1/4 NPT female G 1/2 mâle 1/4 NPT fem. G 1/2 mâle 1/4 NPT female Fig. 4 RP / RN weight : 6.4 kg Fig. 5 RP / RN weight : 7 kg Fig. 6 RPW / RWN weight : 6.6 kg Fig. 7 RPW / RWN weight : 7 kg G 1/2 mâle 1/4 NPT female 2 holes G 1/4 2 holes G 1/4 24/flat hexagonal 24 /flat hexagonal G 1/2 mâle 1/4 NPT female imensions (mm) RP / RPN medium pressure range Fig. 1 RP / RPN weight : 3 kg Fig. 2 RP / RPN weight : 3 kg P BP 6 pans 24/plats P BP G 1/2 male 1/4 NPT femelle 6 pans 24/plats G 1/2 male 1/4 NPT femelle Page 49

6 Options Other cables glands All stainless steel construction (screws and sensing element) for aggressive environments French electricity (F) version (consult SPTN ZP, ZP, ZPW leaflet) Specific connection leanliness for oxygen service ode 0765 Stainless steel tag plate and wire ode 9941 onnection on pipe 2 " dia. ode 0407 Adjustment of the set point ode STP Ordering etails - R odel Pressostat Type ode 110 to 163 P P PW PN PN PWN ode 211to 651 P PN icroswitch ** 1 standard changeover switch 2 simultaneous changeover switches 1 hermetically changeover switch 1 hermetically scaled ultra sensitive changeover switch 1 ultra sensitive changeover switch 2 ultra sensitive changeover switches 2 movable changeover switches 2 hermetically ultra sensitive changeover switches 2 hermetically changeover switches 1 gold contact changeover switch 1 tropicalized changeover switch 1 changeover switch with manual reset opening on rise 1 changeover switch with manual reset opening on fall Pneumatic changeover NO Pneumatic changeover NF 1 digit digit 5 digit Rxxxxxxxx R P P PW PN N WN P PN A B F G V W N Z Y ode easurement range mbar RP RPN RP RN RPW RWN X X X X X X X X X X X X X X X X X X X X X X ode easurement range bar RP RPN X X X X X X X X X X X X Protection Standard 6 digit A ydraulic connection G 1/4 female (161, 162, 163 only) G 1/2 1/2 NPT male 1/4 NPT female 7 digit ** Pressure SPT microswitches range only codes in table digit xxx ** SPT microswitches only lectronuclear versions: ZPN-S or, ZP-S or, ZPW-S or Page 50

RPP Medium range pressure switches

RPP Medium range pressure switches ll industrial environments ll fluids One or two thresholds ll stainless steel version for aggressive environments French lectricity Generating Board (F) electronuclear