Series 921 Pneumatic Controller for Temperature - ARCA-Regler - (Version JPG) - PDF Catalogue | Technical Documentation

Pneumatic controller 00 400 for Temperature

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Class VB: Case Compensated

Suitable for line lengths up to 6 m. May be used for longer lines, but errors due to ambient temperature changes will be proportional to length.

Class VA: Case and Line Compensated.

The robust "Vannul" (R) capillary is self-compensating for ambient temperature changes. Can be used for line lengths up to 33 m without excessive error.

This leaflet is a complement to leaflet DS 920 e.

Temperature Measuring Elements

The basic element for ranges of - 40" to + 600" C is a precahbrated mercury-filled system. Elementsac-tuated by vapor, gas and organic liquids are also available.

All temperature systems are interchangeable with Bourdon and metal diaphragm actuated elements. The standard unit is provided with a plain bulb and 6 m armored capillary, all in stainless steel. Bulbs, connections and armor are available in various materials to meet the requirements of any application.

Mercury

Mercury-filled elements are all-welded and provide a uniform scale instrument over short or long ranges of temperature. The mercury provides a high order of repeatability and responsiveness.

Table I

Measuring ranges for mercury-filled systems (° C) Standard:-40...- 50 Special:0...+300 -20...- 90 30...+150 0...+ 65 30...+240 0...+ 100 40...+ 100 0...+ 150 60...+ 180 0...+ 200 60...+ 220 10...+200 100...- 200 10...+300 200...+ 600

Table II Thermal Element Characteristics


Actuation	Class	Tempers high limit	iture * C low limit	Minimum range ° C	Bulb0	max. Length of Capillary	Fig.
Mercury	VA VB	600	-40	55	1/2"	33 m 6 m	3
Liquid	CD >	200	- 87	30	1/4*	33 m 1,5 m	4
Steam Gas	HA IIB 1KB	175 Ambient 540	Ambient - 70 - 87	55 170	1/2* 3/4*	33 m 33 m	5

Series 921 Pneumatic Controller for Temperature - ARCA-Regler - #1

Angle valve, Control valve, Diaphragm actuator, Steam valve, Sanitary valve