Danfoss KPS, KPS 43, KPS 45, KPS 47, KPS 76 Data sheet

...

Data sheet

Pressure switch and Thermostat KPS

The KPS Series consists of a series of pressure and temperature controlled switches. In this series, special attention has been given to meeting demands for a high level of enclosure, robust and compact construction, and resistance to shock and vibration.

For KPS pressure switches the position of the contacts depends on the pressure in the inlet connection and the set scale value.

For KPS thermostats the position of the contacts depends on the temperature of the sensor and the set scale value.

The series covers most outdoor as well as indoor application requirements and is suitable for use in monitoring alarm and control systems in factories, diesel plants, compressors, power stations and on board ships.

Features

Approvals

Ship approvals

• A high level of enclosure

• Adjustable dierential

CE-marked in accordance with: – LVD 2014/35/EU (EN 60947-1, EN 60947-4-1, EN 60947-5-1)

American Bureau of Shipping, ABS Det Norske Veritas, DNV Germanischer Lloyd, GL Registro Italiano Navale, RINA (KPS 43, KPS 45, KPS 47, KPS 76, KPS 77, KPS 79, KPS 80, KPS 81, KPS 83) Maritime Register of Shipping, RMRS

• Robust and compact construction

• Resistance to shock and vibration

• Available with all major marine approvals

Underwriters Laboratories Inc., US-UL (excluding KPS 39) China Compulsory Certicate, CCC

Nippon Kaiji Kyokai, NKK (KPS 31, KPS 33, KPS 35, KPS 37, KPS 39, KPS 43, KPS 45, KPS 47) China Classication Society, CCS Bureau Veritas, BV Korean Register of Shipping, KR (KPS 35, KPS 37, KPS 39, KPS 43, KPS 45, KPS 47) Lloyds Register of Shipping, LR

IC.PD.P10.I6.02 | 520B7855 | 1© Danfoss | DCS (jmn) | 2017.03

Data sheet | Pressure switch and Thermostat, KPS

Overview

1. Standard pressure switches

[bar] Range P

-1 0 10 20 30 40 50 60

[bar]

0 – 2.5 KPS 31 3

0 – 3.5 KPS 33 3

0 – 8 KPS 35 3

6 – 18 KPS 37 3

10 – 35 KPS 39 3

2. Pressure switches for high pressure and strongly pulsating media

[bar] Range P

-1 0 10 20 30 40 50 60 [bar]

1 – 10 KPS 43 3

4 – 40 KPS 45 3

6 – 60 KPS 47 3

3. Thermostats

Typ e

Further

information page

Further

information page

[°C] Range P

-50 0 50 100 150 200 200 [°C]

-10 – 30 KPS 76 11

20 – 60 KPS 77 11

50 – 100 KPS 79 11

70 – 120 KPS 80 11

60 – 150 KPS 81 11

100 – 200 KPS 83 11

Typ e

Further

information page

Data sheet | Pressure switch and Thermostat, KPS

PRESSURE SWITCH

Technical data and ordering

KPS 31, KPS 33

KPS 35, KPS 37, KPS 39

1. Pressure switches

Typ e Setting

KPS 31 0 – 2.5 0.1 6 6 G 1/

KPS 31 0 – 2.5 0.1 6 6 G 3/8 A 060-310966

KPS 33 0 – 3.5 0.2 10 10 G 1/

KPS 33 0 – 3.5 0.2 10 10 G 3/8 A 06 0-310366

KPS 35 0 – 8 0.4 – 1.5 12 12 G 1/

KPS 35 0 – 8 0.4 – 1.5 12 12 G 3/8 A 060-310066

KPS 35 0 – 8 0.4 12 12 G 1/

KPS 37 6 – 18 0.85 – 2.5 22 27 G 1/

KPS 37 6 – 18 0.85 – 2.5 22 27 G 3/8 A 060-310166

KPS 39 10 – 35 2.0 – 6 45 53 G 1/

KPS 39 10 – 35 2.0 – 6 45 53 G 3/8 A 060-310266

range P

Adjustable/

xed

dieretial

Permissible

operating

pressure P

Max. test

pressure

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

Pressure

connection

Code no.

060-311066

060-310466

060-310566

060-310866

060-310666

060-310766

KPS 43, KPS 45, KPS 47

When ordering, please state type and code number

Terminology

2. Pressure switches for high pressure and strongly pulsating media

Typ e Setting

range P

Adjustable

also gs. 1,

di. see

2, and 3

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

KPS 43 1 – 10 0.7 – 2.8 120 180 24 0 G 1/

KPS 45 4 – 40 2.2 – 11 120 180 240 G 1/

KPS 47 6 – 60 3.5 – 17 120 180 24 0 G 1/

Range setting The pressure range within which the unit will give a signal (contact changeover).

Permissible

overpressure

Max. test

pressure

Min. burst

pressure

Pressure

connection

Max. test pressure The highest pressure the unit may be subjected to when, for example, testing the system for leakage. Therefore, this pressure must not occur

Dierential

as a recurring system pressure. The dierence between make pressure and break pressure (see also g. 5 & 6, page 6).

Min. bursting pressure

The pressure which the pressure-sensitive Permissible overpressure

element will withstand without leaking. The highest permanent or recuiring pressure the unit can be loaded with.

Code no.

060-312066

060-312166

060-312266

Data sheet | Pressure switch and Thermostat, KPS

Technical data and ordering

(continued)

Switch Single pole changeover (SPDT) Contact material: Gold-plated silver contact

Ohmic 10 A, 440 V, AC-1

Contact load (when Au surface isburntaway)

Alternating current

Inductive

Starting current max. 50 A (locked rotor)

6 A, 440 V, AC-3

4 A, 440 V, AC-15

Direct current 12 W, 220 V, DC-13, see curve, g. 4, page 5

Ambient temperature

Temperature of medium

KPS 31 – 39 -40 – 70 °C

KPS 43 – 47 -25 – 70 °C

KPS 31 – 39 -40 – 100 °C

KPS 43 – 47 -25 – 100 °C

Vibration resistance Vibration-stable in the range 2 – 30 Hz, amplitude 1.1 mm og 30 – 300 Hz, 4 g.

IP67 (including IPX6) according to EN 60529.

Enclosure

The pressure switch housing is enamelled pressure die cast aluminium (GD-AlSi 12). Thecover is fastened by four screws which are anchored toprevent loss. The enclosure can be sealed with wire.

Cable entry Pg 13.5 for cable diameters from 5 – 14 mm.

Identication The type designation and code no. of the unit is stamped in the side of the housing.

For water and seawater, max. 80 °C.

Types Scale accuracy Mean value of snap point variation after

400000operations

[bar] [bar]

KPS 31 ±0.2 ±0 .1

KPS 33 ±0.3 ±0.2

KPS 35 ±0.5 ±0.3

KPS 37 ±1.0 ±0.4

KPS 39 ±3.0 ±0.7

KPS 43 ±1. 0 ±0.2

KPS 45 ±4.0 ±1.0

KPS 47 ±6.0 ±1. 5

Materials in contact with the medium

Typ e Materials

Bellows capsule Deep-drawn plate, material no. 1.0524 (DIN 1624)

KPS 31, KPS 33

KPS 35, KPS 37, KPS 39

KPS 43, KPS 45, KPS 47

Bellows Stainless steel, material no. 1.4306 (DIN 17440)

Pressure connection Steel C20, material no. 1.0420 (DIN 1652)

Bellows Stainless steel, material no. 1.4306 (DIN 17440)

Pressure connection Brass, W. no. 2.0401 (DIN 17660)

Diaphragm capsule Nickel-plated brass, DIN 50 968 Cu/Ni 5 (DIN 1756)

Diaphragm Nitrile-Butadien rubber

[bar]

Danf

60-501.12.20

Danf

60-502.12.20

[bar]

Danf

60-503.12.20

[bar]

Data sheet | Pressure switch and Thermostat, KPS

Technical data and ordering

(continued)

KPS 43

Fig. 1

KPS 47

KPS 45

[bar]

oss

[bar]

oss

Fig. 2

[bar]

A: Range setting B: Dierential scale C: Obtained dierential

Fig. 3

Direct current (DC) -load

[mA]

12 W

oss

Fig. 4

[V]

Curve A:

gives the maximum load

Hatched area B:

Acceptable load for thegoldplating ofthecontact

Data sheet | Pressure switch and Thermostat, KPS

Function

I. Alarm for falling pressure

given at the set rangevalue

II. Alarm for rising pressure

given at the set range value plus the dierential.

1. KPS 31

Contacts 1-2 make and contacts 1-4 break when the pressure falls under the set range value. The contacts changeover to their initial position when the pressure again rises to the set range value plus the dierential (see g. 5).

[bar]

Fig. 5

[s]

Scale setting Mechanical dierential

I. Alarm for rising pressure

given at the set rangevalue

II. Alarm for falling pressure

given at the set range value minus the dierential

2. All other KPS pressure SWITCHES

Contacts 1-4 make and contacts 1-2 break when the pressure rises above the set range value. The contacts changeover to their initial position when the pressure again fails to the range value minus the dierential (see g. 6).

[bar]

Fig. 6

[s]

Scale setting Mechanical dierential

Danf

60-502.12.20

[bar]

Data sheet | Pressure switch and Thermostat, KPS

Function

(continued)

KPS 45

[bar]

oss

Fig. 7

Example 1

An alarm must be given when the lubricating oil pressure in an engine falls below 0.8 bar. The alarm is in the form of a lamp. Choose a KPS 31 (range 0 – 2.5 bar). The minimum permissible lubricating oil pressure of 0.8 bar must be set on the rangespindle. The dierential is xed at 0.1 bar, i.e. the alarm will not cut out before the pressure rises to

0.9 bar. The lamp must be connected to terminals 1and 2 in the pressure switch.

Example 2

An alarm must be given by a bell when the

pressure in a boiler rises to 10 bar. The normal

operating pressure is 9 bar.

Choose a KPS 37 (range 6 – 18 bar).

The range value of the pressure switch must be

set at 10 bar, the dierential at 1 bar.

The bell must be connected to terminals 1 and 4.

Example 3

The pressure in a start air reservoir must be

regulated with a compressor controlled by a KPS

pressure switch so that it lies between 30and

36bar.

Choose a KPS 45 (range 4 – 40 bar).

The range value must be set at 36 bar.

The dierential of 6 bar must be set in

accordance with the nomogram, g. 7,

atapprox. 2 on the dierential scale.

The required start function is obtained by

connection to terminals 1 and 2 in the

pressureswitch.

Data sheet | Pressure switch and Thermostat, KPS

Dimensions [mm] and weights [kg]

Net weight: KPS 31 – 39 approx. 1.0 kg KPS 43 – 47 approx. 1.3 kg

KPS 35, KPS 37, KPS 39 KPS 43, KPS 45, KPS 47 KPS 31, KPS 33

Data sheet | Pressure switch and Thermostat, KPS

Accessories

Part Description Code no.

Connector with nipple

Reducer

Danfoss

G 3/8 connector, nipple and washer (10mm o.d. × 6.5 mm i.d.) for brazing

G 3/8 connector, nipple and washer (10mm o.d. × 6.5 mm i.d.) for welding

17.9051

G 3/8 × 7/16 – 20 UNF (1/4 are) reduction with washer

017- 436 866

017-422966

017- 42056 6

Adapter G 3/8 × 1/8 – 27 NPT with washer 060-333466

Nipple G 3/8 o.d × 7/16 – 20 UNF (1/4 are) 060-324066

Nipple G 3/8 A – 1/4 NPT with washer 060 -333566

Adapter G 3/8 × 1/4 – 18 NPT with washer 060-333666

Nipple

G 1/4 A × G 3/8 A 060-333266

G 1/4 A x o.d. M10 × 1 with washer 060 -333866

Damping coil with 1/4 are connectors and 1 m copper capillary tube. Damping coils

Danfoss

60.9003

Damping coil

used for applications with 3/8 RG connector requires the use of reducer.

060-017166

For informations about capillary tube lengths, please contact Danfoss.

Damping coil

Armoured damping coil

Danfoss

60.9030

Damping coil with G 3/8 connectors and 1.5 m copper capillary tube

Damping coil with G 3/8 connectors and 1 m armoured copper capillary tube. Standard washers included.

060-104766

060-333366

Data sheet | Pressure switch and Thermostat, KPS

Installation

Fig. 8

Fig. 9

1. Range spindle

2. Range scale

3. Dierential spindle

4. Dierential scale

5. Locking screw

Installation

KPS pressure switches are tted with a 3 mm steel mounting plate. The units should not be allowed to hang from the pressure connection.

Pressure connection

When tting or removing pressure lines, the spanner ats on the pressure connection should be used to apply counter-torque.

Steam plant

To protect the pressure element from excessive heat, the insertion of a water-lled loop is recommended. The loop can, for example, be made of 10 mm copper tube as shown in g. 8.

Water systems

Water in the pressure element is not harmful, but if frost is likely to occur a water-lled pressure element may burst. To prevent this happening, the pressure control can be allowed to operate on an air cushion.

Media-resistance

See table of materials in contact with the medium, page 4. If seawater is involved, types KPS 43, KPS 45, KPS 47 are recommended.

Pulsations

If the pressure medium is superimposed with severe pulsations, which occur in automatic sprinkler systems (re protection), fuel systems for diesel motors (priming lines), and hydraulic systems (e.g. propeller systems), etc., types KPS43, KPS 45, KPS 47 are recommended. The maximum permissible pulsation level for these types is 120 bar.

Setting

When the pressure switch cover is removed, and

the locking screw (5) is loosened, the range can

be set with the spindle (1) while at the same time

the scale (2) is being read. In units having an

adjustable dierential, the spindle (3) must be

used to make the adjustment. The dierential

obtained can be read direct on the scale (4) or,

with types KPS 43, KPS 45, KPS 47, can be

determined by reading the scale value and using

the nomograms in gs. 1, 2, 3 (page 5). The

working line for determining the dierential

must not intersect the shaded areas in the

nomograms.

Selection of dierential

To ensure that the plant functions properly,

a suitable dierential pressure is necessary. Too

small a dierential will give rise to short running

periods with a risk of hunting. Too high

adierential will result in large pressure

oscillations.

Electrical connection

KPS pressure switches are tted with a Pg 13.5

screwed cable entry that is suitable for cable

diameters from 5 – 14 mm.

Contact function is shown in g. 10.

Fig. 10

Data sheet | Pressure switch and Thermostat, KPS

THERMOSTAT

Technical data and ordering

Setting

range P

[°C] [°C] [°C] [mm] [m]

KPS with rigid sensor

Typ e

KPS 76 -10 – 30 3 – 10 80 65 75 110 160 2 – 060L311266 060L311366

KPS 77 20 – 60 3 – 14 130 – 75 – – – 060L311866 – –

KPS 77 20 – 60 3 – 14 130 – – 11 0 – – 060L310066 – –

KPS 77 20 – 60 3 – 14 130 – – – 160 – 060L313666 – –

KPS 77 20 – 60 3 – 14 130 65 75 110 16 0 2 – 0 60L310166 060L310266

KPS 77 20 – 60 3 – 14 130 – – 11 0 160 5 – 060L311966 –

KPS 79 50 – 100 4 – 16 200 – 75 – – – 060L312166 – –

KPS 79 50 – 100 4 – 16 200 – – 110 – – 060L310366 – –

KPS 79 50 – 100 4 – 16 200 – – – 160 – 060L313766 – –

KPS 79 50 – 100 4 – 16 200 65 75 110 160 2 – 060L310466 060L310566

Mech.

di.

adjust-

able/

xed

Max.

sensor

temp.

Suitable sensor

pocket

length see also

“Accessories”

Code no.

Cap. tube

length

KPS with remote sensor

KPS with remote sensor and armoured capillary tube

When ordering, please state type and code number

KPS 79 50 – 100 4 – 16 200 – – 110 160 5 – 060L312266 –

KPS 79 50 – 100 4 – 16 200 – – 110 160 8 – 060L312466 –

KPS 79 50 – 100 4 – 16 200 65 75 110 160 3 – 060L314366 –

KPS 80 70 – 120 4.5 – 18 220 – 75 – – – 060L312666 – –

KPS 80 70 – 120 4.5 – 18 220 – – 110 – – 060L312766 – –

KPS 80 70 – 120 4.5 – 18 220 – – – 160 – 060L313866 – –

KPS 80 70 – 120 4.5 – 18 220 – – – 200 – 060L315766 – –

KPS 80 70 – 120 4.5 – 18 220 65 75 110 160 2 – 060L312866 060L312966

KPS 80 70 – 120 4.5 – 18 220 65 75 110 160 3 – 060L315666 –

KPS 80 70 – 120 4.5 – 18 220 – – 110 160 5 – 060L313066 –

KPS 80 70 – 120 4.5 – 18 220 – – 110 160 8 – 060L313266 –

KPS 81 60 – 150 5 – 25 250 65 75 110 160 2 – 060L310666 060L310766

KPS 81 60 – 150 5 – 25 250 – – 110 160 5 – 060L313466 –

KPS 81 60 – 150 5 – 25 250 – – 110 160 8 – 0 60 L311166 –

KPS 81 60 – 150 5 – 25 250 – – 200 – – 060L311066 – –

KPS 83 100 – 200 6.5 – 30 300 65 75 110 16 0 2 – 060L310866 060L310966

KPS 83 100 – 200 18 300 65 75 11 0 160 2 – 060L313966

–

Electrical connection

KPS thermostats are tted with a Pg 13.5 screwed

cable entry suitable for cables from 5 – 14 mm.

Contact function is shown in g. 11

Fig . 11

Data sheet | Pressure switch and Thermostat, KPS

Technical data

Switch Single pole changeover (SPDT) Contact material: Gold-plated silver contact

Ohmic 10 A, 440 V, AC-1

Contact load (when Au surface isburntaway)

Ambient temperature -40 – 70 °C

Vibration resistance Vibration-stable in the range 2 – 30 Hz, amplitude 1.1 mm og 30 – 300 Hz, 4 G.

Enclosure

Cable entry Pg 13.5 for cable diameters from 5 – 14 mm.

Identication The type designation and code no. of the unit is stamped in the side of the housing.

Types

KPS 76 ±3 max. drift 2

KPS 77

KPS 79

KPS 80 ±3 max. drift 2

KPS 81 ±6 max. drift 2

KPS 83 ±6 max. drift 2

Scale values are indicative only. Results given in table are measured in laboratory conditions for factory set values (scale center). The scale accuracy for min and max positions could dier signicantly. There are many factors which could inuence on product working and scale accuracy.

Alternating current

Direct current 12 W, 220 V, DC-13, see g. 12

IP67 to EN 60529 / IEC 60529. The thermostat housing is enamelled pressure die cast aluminium (GID-AlSI 12). Thecover is fastened by four screws which are anchored to prevent loss. The enclosure can be sealed with fuse wire.

Scale accuracy

[°C] [°C]

±3 max. drift 2

Inductive

Starting current max. 50 A (locked rotor)

Snap point variation after 400000operations

6 A, 440 V, AC-3

4 A, 440 V, AC-15

Direct current (DC) -load

[mA]

12 W

Fi g. 12

[V]

Curve A: gives the maximum load

Hatched area B: Acceptable load for thegoldplating ofthecontact

Data sheet | Pressure switch and Thermostat, KPS

Function

Selection of dierential

To ensure that the plant functions properly, asuitable dierential is necessary. Too small adierential will give rise to short running periods with a risk of hunting. Too high adierential will result in large temperature variations.

Dierentials

The mechanical dierential is the dierential that is set by the dierential spindle in the temperature control. The thermal dierential (operating dierential) is the dierential the system operates on.

[bar]

The thermal dierential is always greater than the mechanical dierential and depends on three factors:

1) the ow velocity of the medium,

2) the temperature change rate of the medium,

3) the heat transmission to the sensor.

Thermostat function Contacts 1–4 make while contacts 1–2 break when the temperature rises above the scale setting. The contacts changeover to their initial position when the temperature falls to the scale setting minus the dierential. See g. 13.

I. Alarm for rising pressure

given at the set rangevalue

II. Alarm for falling pressure

given at the set range value minus the dierential

Fi g. 13

[s]

Scale setting Mechanical dierential

Data sheet | Pressure switch and Thermostat, KPS

Dimensions [mm] and weights [kg]

KPS with remote sensor

KPS with remote sensor and armoured capillary tube

Net weight: ca 1.2 kg (incl. 2 m capillary tube) Net weight: ca 1.4 kg (incl. 2 m capillary tube)

KPS with rigid sensor

ø13

Net weight: ca 1.0 kg

ø3

Sensor pocket length “A” Sensor length ”L”

75 105

110 138

160 190

200 230

Data sheet | Pressure switch and Thermostat, KPS

Accessories Sensor pockets for KPS thermostats

[mm]

Brass sensor pocket Steel 18/8 sensor pocket

Thread

/2 NPT 060L326566 – – –

/2 NPT 060L326466 75 G 1/2 A 060L326766

75 G 1/2 A 060L326266 – – –

75 G 3/4 A 060L326666 – – –

Supplied without gland nut, gaskets and washer

75 G 1/2 A 060L328166 – – –

110

/2 NPT 060L328066 110 G 1/2 A 060L326866

110 G 1/2 A 060L327166 110

110 G 1/2 A — – – –

110 G 3/4 A 060L340366 – – –

160 G 1/2 A 060L326366 160 G 1/2 A 060L326966

200 G 1/2 A 060L320666 – – –

200 G 1/2 A 060L340866 – – –

250 G 1/2 A 060L325466 – – –

330 G 1/2 A 060L325566 – – –

Part Description Code no.

Code no.

[mm]

Thread

/2 NPT 060L327066

Code no.

Clamping band

WHeat-conductive

compound (4.5 cm2 tube)

Gasket set

For KPS thermostats with remote sensor (L = 392 mm)

For KPS thermostats with sensor tted in a sensor pocket. Compound for lling sensor pocket to improve heat transfer between pocket and sensor. Application range for compound: between pocket and sensor. Application range for compound:

-20 – 150 °C, momentarily up to 220 °C.

For KPS thermostats without armoured capillary tubes

For KPS thermostats with armoured capillary tubes

017- 420466

041E 0114

060L327366

060L036666

Data sheet | Pressure switch and Thermostat, KPS

Installation

Location of unit: KPS thermostats are designed to withstand the shocks that occur, e.g. in ships, on compressors and in large machine installations. KPS thermostats with remote sensor are tted with a base of 3 mm steel plate for xing to bulkheads, etc. KPS thermostats with bulb sensor are self-supporting from the sensor pocket.

Resistance to media

Material specications for sensor pockets:

Sensor pocket, brass

The tube is made of Ms 72 to DIN 17660, the threaded portion of So Ms 58Pb to DIN 17661.

Sensor pocket, stainless steel 18/8 Material designation 1.4305 to DIN 17440.

Permissible media pressure on the sensor pocket as a function of temperature

[bar]

Brass

Sensor position

As far as possible the sensor should be positioned so that its longitudinal axis is at right angles to the direction of ow. The active part of the sensor is ø13 mm × 50 mm long on rigid sensors and 2 m capillary tube. The active length on the other thermostats is 70 mm (5 m and 8 m capillary tubes).

The medium

The fastest reaction is obtained from a medium having high specic heat and high thermal conductivity. It is therefore advantageous to use a medium that fullls these conditions (provided there is a choice). Flow velocity of the medium is also of signicance. (The optimum ow velocity for liquids is about 0.3 m/s). For permissible media pressure see g. 14.

Stainless steel

thermostats

with

Fi g. 14

Fi g. 15

[°C]

Setting

When the thermostat cover is removed, and the locking screw (5, g. 15) is loosened, the range can be set with the spindle (1) while at the same time the scale (2) is being read. In units having an adjustable dierential, the spindle (3) can be used while the scale (4) is being read.

1. Range spindle

2. Range scale

3. Dierential spindle

4. Dierential scale

5. Locking screw

Factor for setting point

Data sheet | Pressure switch and Thermostat, KPS

Installation

(continued)

Scale correction

The sensor on KPS thermostats contains an adsorption charge. Therefore function is not aected whether the sensor is placed warmer or colder than the remaining part of the thermostatic element (bellows and capillary tube). However, such a charge is to some extent sensitive to changes in the temperature and bellows and capillary tube. Under normal conditions this is of no importance, but if the temperature control is to be used in extreme ambient temperatures there will be a scale deviation.

deviation

The deviation can be compensated for as follows: Scale correction = Z × a Z can be found from g. 16, while a is the correction factor from the table below.

Danfoss

60-413.12

Relative scale setting in [%]

Fig. 16

Typ e

KPS 76 -10 – 30 – 1.1 –

KPS 77 20 – 60 1.0 1.4 –

KPS 79 50 – 100 1.5 2.2 2.9

KPS 80 70 – 120 1.7 2.4 3.1

KPS 81 60 – 150 – 3.7 –

KPS 83 100 – 200 – 6.2 –

Regulation range Correction factor a for thermostats

[°C] with rigid sensor with 2 and 5 m cap. tube with 8 m cap. tube

Examples

Example 1

A diesel engine with cooling water temperature of 85 °C (normal). An alarm must be triggered if the cooling water temperature exceeds 95 °C. Choose a KPS 80 thermostat (range 70 – 120 °C). Main spindle setting: 95 °C. Dierential spindle setting: 5 °C. The required alarm function is obtained by connecting to thermostat terminals 1–4. After the system has been in operation, assess the operating dierential and make a correction ifnecessary.

Example 2

Find the necessary scale correction for a KPS 80 set at 95 °C in 50 °C ambient temperature. The relative scale setting Z can be calculated from the following formula:

Setting value-min. scale value

max. scale value-min. scale value

Relative scale setting:

Factor for scale deviation Z (g. 16 page 17), Z ≈ 0.7 Correction fac tor a (table under fig. 16 page 17) = 2.4 Scale correction = Z×a = 0.7×2.4 = 1.7 °C The KPS must be set at 95+1.7 = 96.7 °C

95-70

120 -70

×100 = %

×100 = 50%

Danfoss KPS, KPS 43, KPS 45, KPS 47, KPS 76 Data sheet

Specifications and Main Features

Frequently Asked Questions

User Manual