Danfoss KP 34, KP, KP 35, KP 36, KP 37 Data sheet

Data Sheet

Pressure switches and thermostats

Type KP

For steam, air, gaseous and liquid media

KP Pressure Switches

Danfoss KP switches are used for regulating, monitoring and alarm systems in the industry. They provide automatic limit protection or manual reset limit protection for pressure systems. Can be used with steam, air, gaseous and liquid media.

The pressure switches are €tted with singlepole changeover switch (SPDT). The position of the switch depends on the setting of the pressure switch and the pressure in the connector.

KP Thermostats

KP thermostats are temperature-operated electric circuit breakers. The thermostats are €tted with single-pole changeover switch (SPDT)

The position of the switch depends on the thermostat setting and sensor temperature. A KP thermostat can be connected and switch to single-phase alternating current motors of up to 2 kW.

AI209986438809en-000602

Pressure switches and thermostats, Type KP

Features

•Wide regulating range

•Small dimensions

Space-saving, easy to install in panels

•Shock and impact resistant

•Ultra-short bounce time. Limits wear to an absolute minimum and increases reliability

•Snap action electrical contacts minimize chatter, bounce, and wear, and ensure long term electrical and mechanical reliability

•Electrical connection from front of the unit. Makes rack mounting easier and also saves space

•Suitable for alternating current and direct current

•Screwed wiring, makes rewiring easy

•Manual trip allows electrical function test without tools

•Versions with automatic and manual reset available

Functions

Pressure switches

Table 1: Design and function

	Key sketch of KP pressure switch	Simplified drawing of KP pressure switch without front cover and scale.
		Version with manual reset.

1	Range setting spindle												6	Bellows				11					Cable entry: ½ in female NPSM
2	Di‚erential setting spindle												7	Pressure connector				12					Tumbler
3	Main arm												8	Contact system				13					Locking screw
4	Main spring												9	Switch terminals				14					Manual reset
5	Di‚erential spring												10	Ground terminal				15					Distance plate

The contact system of KP switches has a snap-action function and the bellows moves only when cut-in or cut-out set point is reached.

The design has the following advantages:

•higher contact load

•ultra short bounce time

•long mechanical and electrical lifetime

•high resistance to vibrations and pulsations

© Danfoss | Climate Solutions | 2021.02

AI209986438809en-000602 | 2

Pressure switches and thermostats, Type KP

Thermostats

Table 2: Design and function

	Key sketch of KP 79, KP 81 thermostats	Simplified drawing of KP thermostat without front cover and scale.
		Version with manual reset.

1	Range setting spindle								7	Temperature sensors		12	Tumbler
2	Di‚erential setting spindle								8	Contact system		13	Locking screw
3	Main arm								9	Terminals		14	Manual reset
4	Main spring								10	Ground terminal		15	Distance plate
5	Di‚erential spring								11	Cable entry: ½ in female cable
										gland
6	Bellows

The contact system of KP switches has a snap-action function and the bellows moves only when cut-in or cut-out set point is reached.

The design has the following advantages:

•higher contact load

•ultra short bounce time

•long mechanical and electrical lifetime

•high resistance to vibrations and pulsations

© Danfoss | Climate Solutions | 2021.02

AI209986438809en-000602 | 3