SA121, SA122, SA128 and SA1219

Self-acting Temperature Control Systems

Description

A range of self-powered control systems that incorporate sensor, actuator, set point adjustment / indicator for use with the following
valve types:-
2-port KA, KB, KC, KX, KY, SB, SBRA, BX and BXRA, BM, BMRA, BMF, BMFRA, NS and NSRA
3-port TW

Available types

SA121, SA122, SA128 and SA1219 Self-acting Temperature Control Systems

Set point adjustment at sensor
SA121	For use on	2-port valves	DN15 to DN80
		3-port valves	DN20 to DN50
SA1219	For use on	3-port valves	DN80 and DN100
SA128	For use on	2-port valves	DN15 to DN25
		3-port valves	DN20 and DN25
Set point adjustment at valve
SA122	For use on	2-port valves	DN15 to DN25
		3-port valves	DN20 and DN25

Optional extras

Union kit	Direct immersion
Pocket Pocket material options include copper and stainless steel.	Indirect immersion
Wall bracket
Duct adaptor	Duct mounting
Nickel plating
Dial type set point adjuster
Pt100 temperature sensor	SA122TP incorporate an internal pocket to accept a Pt100 sensor

Materials

SA121, SA122, SA128 and SA1219 Self-acting Temperature Control Systems

No.	Part	Material
1	Sensor	Brass
2	Actuator	Brass
3	Capillary tube	Copper with PVC coated armoured covering
4	Adjustment head	Polypropylene
5*	Union kit	Brass
6	Mounting bracket	Steel
7	Clip	Polypropylene
8*	Adaptor plate (Duct fixing adaptor)	Steel
9*	Pocket	Copper	BS 2871 C106
		Stainless steel	BS 3605 CFS 316S 18
10	Liquid fill	Kerosene

Temperature ranges

SA121 and SA1219	Range 1 -15 °C to 50 °C
	Range 2 40 °C to 105 °C
	Range 3 95 °C to 160 °C
Over temperature protection	55 °C over set value to 190 °C maximum
SA122	Range 1 -20 °C to 120 °C
SA122	Range 2 40 °C to 170 °C
Over temperature protection	55 °C over set value
SA128	Range 1 -20 °C to 110 °C
SA128	Range 2 40 °C to 170 °C
Over temperature protection	55 °C over set value to 190 °C maximum
Note – Ambient design temperature	Minimum -35 °C
Note – Ambient design temperature	Maximum +50 °C