Control systems Self-acting controls
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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2013
TI-P073-03 CH Issue 7
Type 130 and HL10 'Safeguard High Limit Control'
Description The Spirax Sarco safeguard high limit control system is supplied set to cut-out at approximately 60 °C and is designed to protect plant from overheating. Note : the settings can easily be altered to initiate cut-out at anywhere between 0 °C and 100 °C. The system comprises of a Type 130 control system coupled to an HL10 high limit cut-out unit complete with 2 m of capillary tube as standard. Note: the Type 130 control system is only suitable for use with the HL10 high limit cut-out unit. For correct installation it is essential to use a sensor pocket (see 'Optional extras'), which can be supplied at extra cost. The system is designed for use with any one of the following 2-port or 3-port control valves: Available types of control valve Note : For full technical data of the valves mentioned below see the relevant Technical Information sheet (TI). SB, KA, KB and KC:- 2-port normally open valves (to close on temperature rise). SBRA, KX, KY and NSRA:- 2-port normally closed valves (to open on temperature rise). Note: These valves must be installed in a separate bypass pipeline unimpeded by any other control valve when used with the safeguard high limit control. TW DN25, 40 and 50:- 3-port mixing/diverting valve. Optional extras Capillary tube (12): In multiples of 2 m to a maximum length of 10 m. Note : The capillary tube should be kept to a minimum to avoid the system being affected by ambient temperature. Pockets (16): Are available in copper or stainless steel having a ¾" BSP (BS 21 taper) or API thread. Union nipple (Y) forms the top of the pocket and carries a rubber washer (X), and gland nut (W). Microswitch (14): This can be connected into an alarm system, using a Kopex conduit connector and flexible conduit (not supplied with the product), and can be arranged to either make or break the electrical circuit on firing of the cut-out (see the 'Current rating table' overleaf). The microswitch has a degree of protection to IP67 (dust tight and protected against the effects of immersion) under BS 5490. The microswitch can be added to an HL10 unit originally supplied without it by purchasing a conversion kit: which includes a conduit entry bracket and two screws for attachment.
Control valve options: 2-port: SB, SBRA, KA, KB, KC, KX, KY or NSRA and 3-port: TW DN25, 40 and 50
4.5 71
Type 130 Control system
10
HL10 High limit cut-out
W Y X
¾" BSP
Microswitch (optional)
Conduit entry bracket
TI-P073-03 CH Issue 7
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Type 130 and HL10 'Safeguard High Limit Control'
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