Pipeline ancillaries Hosedown stations
10
Safety information Pressure
Before attempting any maintenance of any component of the steam/water mixing station consider what is or may have been in the pipeline. Ensure that any pressure is isolated and safely vented to atmospheric pressure before attempting to maintain any component e.g. mixing valve, hose etc. This is easily achieved by fitting Spirax Sarco depressurisation valves type DV (see separate literature for details). Discharge content of hose and station by pulling the gun trigger and eliminate the pressure until the water flow stops. Do not assume that the system is depressurised even when the pressure gauges indicate zero. Temperature Allow time for temperature to normalise after isolation to avoid the danger of burns. For personal protection wear protective clothing, especially heavy duty gloves and safety glasses. Disposal This product is recyclable. No ecological hazard is anticipated with the disposal of this product providing due care is taken.
Maintenance See the Installation and Maintenance Instructions (IM-P157-03) supplied with each system before commencing with any maintenance.
Installation Full details are given in the Installation and Maintenance Instructions (IM-P157-03) supplied with each system. A typical installation is shown below. Supply pipework should be sized according to standard practice.The steam inlet should be sized on the steam flowrate (from the steam consumption chart) at the supply pressure and a steam velocity of between 15 to 25 m/s. Cold water pipework should take into account pressure, length of pipe and acceptable pressure drop.
Typical installation
5
5
1
1
7
2
2
4
4
8
9
10.13 9
3
6
Spares See Installation and Maintenance Instructions IM-P157-03 for details. 1 Ball valve
6 Temperature gauge
2 Strainer
7 Mixing valve
3 Steam trap
8 Mixed water outlet
4 Check valve
9 TCO1 temperature cut-out valve
5 Pressure gauge, syphon and cock
TI-P157-06 CMGT Issue 10
Page 5 of 5
Steam/Water Mixing Stations - Mk II Valve
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