Pipeline ancillaries Hosedown stations
10
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 2024
TI-P157-06 CMGT Issue 10
Steam/Water Mixing Stations - Mk II Valve Description The MkII Spirax Sarco steam / water mixing station is designed to provide hot water economically by blending steam and cold water quickly to the required user temperature. The temperature can be changed by turning the adjustment knob. As the valve is not thermostatically controlled, in order to maintain a fixed hot water temperature the cold water pressure and flowrate must be constant. The installer must ensure that the Local Water Board Regulations are adhered to, with regard to direct use of mains water supply. MkII valves are supplied from 2002 onwards. Operation The mixing valve employs a piston to lift and open the steam valve. The piston is lifted by the cold water supply. If the cold water supply stops the piston will fall, closing the steam valve. To sustain this design integrity the piston must move freely. Scale build-up will prevent movement and regular maintenance must be carried out to ensure the valves safe operation. The TCO1 temperature cut-out valve activates at a temperature of 95 °C to limit the discharge of steam in the event of a system fault. Range Each steam / water mixing station is supplied with isolation valves, pressure gauges, syphons and cocks, steam traps, check valves, union joints, strainers, thermometer and TCO1 temperature cut-out valve. ½" and ¾" stations can be supplied with an optional high quality hose, hose rack and gun for hosedown purposes, see TI-P157-05 and TI-P157-22. High capacity 1" and 1½" stations are intended for fixed installation such as periodic filling of tanks and therefore no hoses or guns are available.
Optional equipment Hosedown gun, hose and hose rack (for ½" and ¾" valves only) refer to TI-P157-05. Hose reel (for ½" and ¾" valves only) refer to TI-P157-22.
Steam inlet
Cold water inlet
Sizes and pipe connections ½", ¾", 1" and 1½" screwed BSP (inlet and outlet)
10.13 5
Available types Size
Range °C Hot water outlet
Flow l/min Minimum to Maximum
Only on 1" and 1.5" versions
½"
40 to 90
2.2 to 108
¾"
40 to 90
6.8 to 200
F
1"
40 to 90
27.3 to 375
1½"
40 to 90
54.4 to 550
Hot water outlet
TI-P157-06 CMGT Issue 10
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Steam/Water Mixing Stations - Mk II Valve
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