Danfoss Electronics RT Data Sheet

Data sheet

Pressure switch RT

RT Pressure switches incorporate a pressure controlled, single-pole change over swich where the contact position depends on the pressure in the connection port and the set value.

The RT series consists of pressure switches, diﬀerential pressure switches and pressure switches for neutral zone regulation, all for general use within the industrial and marine segments. The series also covers safety pressure switches dedicated for steam boiler plants.

For installations in which operation is particularly critical from safety and economic points of view, the use of fail-safe pressure switches is recommended.

The use of gold-plated contacts is also recommended in such installations, provided operation involves only a few switching cycles or signal currents and voltages.

Features • Simple design

• High accuracy

• High repeatability

• Long operation life time

• Available with all major marine approvals

• Safety Integrity Level: SIL 2 according to IEC 61508

IC.PD.P10.6B.02 | 520B8146 | 1

Data sheet | Pressure switch, RT

Approvals

RT 1

RT 1A / RT 121

RT 5A

RT 1AL

RT 5

RT 30AW / RT 30AB / RT 30AS

/ RT 19W / RT 19B / RT 19S

RT 31W / RT 31B / RT 31S /

RT 32W / RT 32B

RT 33B / RT 35W / RT 112W

RT 110

RT 112

RT 113

RT 116 / RT 117 / RT 200

RT 117L / RT 200L

RT 260A/ RT 262A

Approvals

RT 265A / RT 260AL /

RT 262AL / RT 263AL / RT 266AL

• • • • • • • • • • • • • • •

• • •

• • • • • • •

• • • •

• • • • •

• • • • • • • •

• • • • • • • • • • • • • • •

• • • • • • • •

• • • • • • • • • • • • • • •

Note:

in addition we refer to the certiﬁcates, the copies of which can be ordered from Danfoss

Overview/Survey

0 5 10 15 20 25 30

All RT are:

y CE marked in accordance with EN 60947-4/-5 for sale in Europe.

y Further, the RT 19, RT 30, RT 35, RT 112 W, RT 33, RT 31 and RT 32 series is CE marked in accordance

with PED 2014/68/EU, category IV, safety equipment.

CE marked acc. to EN 60947-4/-5

VD TÜV, Germany

Det Norske Veritas and Germanischer Lloyd, DNV GL

Lloyds Register of Shipping, LR

Bureau Veritas, BV

Registro Italiano Navale, RINA

Russian Maritime Register of shipping, RMRS

Nippon Kaiji Kyokai, NKK

China Compulsory Certiﬁcate, CCC

[bar]

Range

pe [bar]

Type

∆p = 0.0 – 0.9 bar ∆p = 0.1 – 1.0 bar ∆p = 0.1 – 1.5 bar ∆p = 0.5 – 4.0 bar ∆p = 0.5 – 6.0 bar ∆p = 1.0 – 6.0 bar

Standard pressure switches

Pressure switches for steam plant

approved by Vd TÜV

Pressure switches with adjustable

neutral zone

Differential pressure switches

-1 – 0

0 – 0.3

0.1 – 1.1

0.2 – 3

-0.8 – 5

0.2 – 6 1 – 10 4 – 17

10 – 30

0.1 – 1.1 0 – 2.5

1 – 10 2 – 10 5 – 25 5 – 25

-0.8 – 5

0.2 – 3

0.2 – 6

4 – 17

10 – 30

-1 – 6

-1 – 9

-1 – 18

-1 – 36

RT 121

RT 113

RT 112

RT 110

RT 1 / RT 1A

RT 200

RT 116

RT 5 / RT 5A

RT 117

RT 112

RT 33B / RT 35W

RT 30AW / RT 30AB / RT 30AS

RT 31W / RT 31B / RT 31S

RT 19W / RT 19B / RT 19S

RT 32W / RT 32B

RT 1 AL

RT 110L

RT 200L

RT 5AL

RT 117L

RT 266AL

RT 263AL

RT 262AL / RT 262A

RT 260AL / RT 260A

RT 260A

RT 265A

IC.PD.P10.6B.02 | 520B8146 | 2

Data sheet | Pressure switch, RT

Technical data and code nos.

RT 113

for manual setting; cover with windows

RT 116 for tamper proof; cap and blank cover

When ordering, please state type and code number.

The type designation for the letters below means:

A: Unit suitable for ammonia L: Unit with neutral zone

Pressure switches

Regulation

range

Adjustable/

ﬁxed

mechanical

diﬀerential

[bar] [bar] [bar] [bar]

-1 – 0 0.09 – 0.4 7 8 G 3/8 A

0 – 0.3 0.01 – 0.05 0.4 0.5 G 3/8 A

0.1 – 1.1

0.07 – 0.16

0.1 – 1.1 0.07 7 8 G 3/8 A

0.2 – 3

0.08 – 0.25

0.08

-0.8 – 5 0.5 – 1.6 22 25 /-20 UNF

-0.8 – 5 0.5 22 25 /-20 UNF

-0.8 – 5 0.5 – 1.6 22 25 G 3/8 A 1)

-0.8 – 5 0.5 22 25 G 3/8 A 1)

-0.8 – 5

1.3 – 2.4

0.2 – 6 0.25 – 1.2 22 25 G 3/8 A

0.2 – 6 0.25 22 25 G 3/8 A 1 – 10 0.33 – 1.30 22 25 G 3/8 A 1 – 10 0.33 22 25 G 3/8 A 4 – 17

1.2 – 4 4 – 17 1.2 – 4 22 25 G 3/8 A 4 – 17

1.2 4 – 17 1.2 – 4 22 25 G 3/8 A 1) 4 – 17

1.3

10 – 30 1 – 4 42 47 G 3/8 A

) Supplied with ø6 / ø10 mm weld nipple.

) With seal cap.

Max. working pressure

Max.

test

pressure

Pressure

connection

ISO 228/1

7 8 G 3/8 A

7 8 G 3/8 A 7 8 G 3/8 A

22 25 G 3/8 A 1)

017-521566 – – –

017-519666 – – –

017-519166 – – 017-519366

– 017-519266 – –

017-529166 – – 017-529266

– – 017-511066 –

017-524566 – – –

– – 017-524666 –

017-500166 – – –

– – 017-500266 –

017-500766 – – –

017-523766 – – 017-524066

– 017-523866 017-523966 –

017-520366 017-520066

– 017-520466 017-519966 –

017-525566 – – –

– – – 017-525366

– 017-5094662) – –

017-5046662) – – –

– 017-5047662) – –

017-529566 – – 017-529666

Pressure switches with adjustable neutral zone

Regulation

range

[bar] [bar] [bar] [bar] [bar]

Mechanical diﬀerential

Adjustable

neutral zone

Max.

working

pressure. PS

-0.8 – 5 0.2 0.2 – 0.9 22 25 G 3/8 A 1)

0.2 – 3 0.08 0.08 – 0.2 7 8 G 3/8 A

0.2 – 6 0.25 0.25 – 0.7 22 25 G 3/8 A 4 – 17 0.35 0.35 – 1.4 22 25 G 3/8 A 1)

10 – 30 1 1 – 3.0 42 47 G 3/8 A

) Supplied with ø6 / ø10 mm weld nipple.

Max. test pressure

Code no.

Pressure

connection

Code no. Type

017L003366

017L001566

017L003266

017L004066

017L004266

Type

RT 121 RT 113 RT 112 RT 112 RT 110 RT 110 RT 1 RT 1 RT 1A RT 1A RT 1A RT 200 RT 200 RT 116 RT 116 RT 5 RT 5 RT 5 RT 5A RT 5A RT 117

RT 1AL

RT 110L

RT 200L

RT 5AL

RT 117L

RT 262 A Diﬀerential pressure switch

Preferred versions

Diﬀerential pressure switches

Regulation range (Δp)

[bar] [bar] [bar] [bar] [bar] [bar]

Mechanical diﬀerential

Adjustable

neutral

zone

0 – 0.9 0.05 0.05 – 0.23 -1 – 6 7 8 G 3/8 A 1) 017D008166 RT 266AL

0.1 – 1.0 0.05 0.05 – 0.23 -1 – 6 7 8 G 3/8 A 1) 017D004566 RT 263AL

0.1 – 1.5 0.1 0.1 – 0.33 -1 – 9 11 13 G 3/8 A 1) 017D004366 RT 262AL

0.1 – 1.5 0.1  -1 – 9 11 13 G 3/8 A 1) 017D002566 RT 262A 0 – 0.3 0.035 – -1 – 10 11 13 G 3/8 A 1) 017D002766

0.5 – 4 0.3 0.3 – 0.9 -1 – 18 22 25 G 3/8 A 1) 017D004866 RT 260AL

0.5 – 4 0.3 – -1 – 18 22 25 G 3/8 A 1) 017D002166 RT 260A

0.5 – 6 0.5 – -1 – 36 42 47 G 3/8 A 1) 017D002366 RT 260A

1.5 –11 0.5 – -1 – 31 42 47 G 3/8 A 1) 017D002466 RT 260A 1 – 6 0.5 – -1 – 36 42 47 G 3/8 A 1) 017D007266

Supplied with ø6 / ø10 mm nipple. / 2) Non-snap action contacts (see spare parts and accessories, contact system 017-018166).

With SPST and SPDT contact system for alarm and cut oﬀ function at 0.8 and 1 bar.

Operation

range for LP

bellows

Max.

working

pressure. PS

Max. test pressure

Pressure

connection

ISO 228/1

Code no. Type

) RT 262A

) RT 265A

IC.PD.P10.6B.02 | 520B8146 | 3

Data sheet | Pressure switch, RT

Technical data and ordering

The designation letters mean:

A: Units suitable for ammonia.

W: Units for control purposes.

B: Safety units with external reset

S: Safety units with internal reset

Pressure switches for steam plant, PED approved acc. to EN 12953-9 and EN 12922-11

Code no.

Regulation

range

Adjustable/

ﬁxed

mechanical

diﬀerential

Max. working pressure

Max.

test

pressure

Pressure

connection

ISO 228/1

[bar] [bar] [bar] [bar]

For rising pressure

0.1 – 1.1 0.07 7 8 G ½ A 0 – 2.5 0.1 7 8 G ½ A

1 – 10 0.8 22 25 G ½ A 1 – 10 0.6 22 25 G ½ A 1 – 10 0.4 22 25 G ½ A 5 – 25 1.2 42 47 G ½ A 5 – 25 1 42 47 G ½ A 5 – 25 1 42 47 G ½ A

017-528266

017-528066

017-518766

–

017-518166

–

– –

017-518866

017-518966

– –

017-518266

017-518366

For falling pressure

0 – 2.5 0.1 7 8 G ½ A

2 – 10 0.3 – 1 22 25 G ½ A 2 – 10 0.3 22 25 G ½ A 2 – 10 0.3 22 25 G ½ A 5 – 25 0.8 – 3 42 47 G ½ A 5 – 25 0.4 42 47 G ½ A

– –

017-526766

– –

017-524766

– –

Pressure switches for low pressure steam plant (pressure monitoring)- not PED approved

0.1 – 1.1 0.07 – 0.16 7 7 G ½ A

017-518466

– –

–

017-526266

017-526866

017-526966

017-524866

Type

RT 112W

RT 35W

RT 30AW

RT 30AB

RT 30AS

RT 19W

RT 19B

RT 19S

RT 33B

RT 31W

RT 31B

RT 31S

RT 32W

RT 32B

RT 112

Preferred versions

Technical data

Designation RT pressure switches

In general -50 – 70 °C

Ambient temperature

Diaphragm version -10 – 70 °C VD TÜV approved -40 – 70 °C

In general -50 – 100 °C

Media temperature

Diaphragm version -10 – 90 °C VD TÜV appr. -40 – 150 °C, see page 6 (Steam plant)

Contact system

Single-pole changeover switch (SPDT)

Alternating current:

Contact load

AC-1: 10A, 400 V AC-3: 4A, 400 V AC-15: 3A, 400 V

Contact material: AgCdO

Direct current:

DC-13: 12 W, 220 V (see ﬁg. 6)

Fig. 6

Special contact system See “accessories” page 15

Cable entry 2 PG 13.5 for 6 – 14 mm diameter cables

Solid / stranded 0.2 – 2.5 mm

Flexible, without ferrules 0.2 – 2.5 mm

Flexible, with ferrules 0.2 – 1.5 mm

Tightening torque max. 1.5 Nm

IP66 acc. to IEC 529 and EN 60529. Units supplied with external reset.

Enclosure

IP54. The thermostat housing is made of bakelite acc. to DIN 53470 Cover is made of polyamide.

IC.PD.P10.6B.02 | 520B8146 | 4

Data sheet | Pressure switch, RT

Materials in contact with the medium

Material Part W .no. DIN

RT 1

RT 1A

RT 5

RT 5A

RT 110

RT 112

RT 113

RT 116

RT 117

RT 121

RT 200 / RT 200L

RT 260A

RT 260A / 262A / RT 262AL

RT 260AL

Stainless steel 18/8 Bellows 1.4306 17440 x x x x x x x x x x x x x x x

Stainless steel 17/7 Spring 1.4568 17224 x x x x x

Brass Housing 2.0402 17660 x x x x x x x

Brass Bellows ring 2.0321 17660 x x x x x x x

Free-cutting steel Flare connection 1.0718 1651 x

RT 265A

RT 263AL / RT 266AL

Deep-drawn steel (nick.plated surface)

Non-alli. carbon steel C 20

Aluminium Gasket 3.0255 1712 x x x x x x x x

NBR rubber Diaphragm x

Deep-drawn steel (surface DIN 50961 weld connection Fe/Zn 5C)

Spring thread Spring 1.1250 17223 x

Housing 1.0338 1623 x x x x x x x x

Weld connect. for connection

Diaphragm housing with welded connector

1.0402 1652 x x x x x x x

1.0338 1623 x

Materials in contact with the medium, PED approved switches

Material Part W .no. DIN

RT 19W / RT

19B / RT 19S

Stainless steel 18/8 Bellows 1.4301 17440 x x x x x x

Stainless steel 17/7 Oriﬁce 1.4305 17440 x x

/ RT

RT 30AW / RT 30AB

30AS

RT 31W / RT

31B / RT 31S

RT 32WB

RT 33B / RT

35W

RT 112 W

Steel C 15 Connector 1.0401 1652 x x

Deep-drawn steel + Ni Bellows ring 1.0338 1623 x x x x x x

Stainless steel 17/7 Bellows spring 1.4568 17224 x x

Stainless steel Ring 1.4305 17440 x

Deep-drawn steel + Ni Housing 1.0338 1623 x x x x x x

Stainless steel Bellows connect. 1.4305 17440 x

Stainless, weldable freecutting steel

Deep-drawn steel + Sn Spring guide 1.0338 1623 x

Brass Housing 2.0402 17660

Brass Bellows ring 2.0321 17660

Connector 1.4301 17440 x x x x

IC.PD.P10.6B.02 | 520B8146 | 5

Data sheet | Pressure switch, RT

Function

Scale setting −−−− Mechanical diﬀerential

Fig. 4. Contact function, setting for rising pressure.

a. RT 19, RT 30 and pressure switches with max. reset

When the pressure exceeds the set range value, contacts 1-4 make and contact 1-2 brake. The contacts changeover to their initial position when the pressure falls to the range value minus the diﬀerential (see ﬁg. 4).

Scale setting −−−− Mechanical diﬀerential

I.Alarm for rising pressure given

at the set range value.

II. Alarm for falling pressure given at the set

range value minus the diﬀerential.

Units with max. reset can only be reset at a pressure corresponding to the set range value minus the diﬀerential, or a lower pressure.

Fig. 5. Contact function, setting for falling pressure.

b. All other RT pressure switches

When the pressure falls to the set range value, contacts 1-2 make and contacts 1-4 brake. The contacts changeover to their original position when the pressure again rises to the set range plus the diﬀerential (see ﬁg. 5).

I. Alarm for falling pressure given at the set range value.

II. Alarm for rising pressure given at the set

range value plus the diﬀerential.

Units with min. reset can only be reset at a pressure corresponding to the set range value plus the diﬀerential.

IC.PD.P10.6B.02 | 520B8146 | 6

+ 11 hidden pages