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2000 Hook-up Book - Spirax Sarco

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Figure II-12<br />

Typical Pressure Reducing Valve Station<br />

Steam<br />

S<strong>up</strong>ply<br />

Strainer<br />

Strainer<br />

Spira-tec<br />

Loss<br />

Detector<br />

Float &<br />

Thermostatic<br />

Steam Trap<br />

Figure II-13<br />

Parallel Operation of Pressure Reducing Valves<br />

Steam<br />

S<strong>up</strong>ply<br />

Moisture<br />

Separator<br />

Moisture<br />

Separator<br />

Strainer<br />

Strainer<br />

Strainer<br />

Spira-tec<br />

Loss<br />

Detector<br />

Float &<br />

Thermostatic<br />

Steam Trap<br />

Check<br />

Valve<br />

Check<br />

Valve<br />

Pilot Operated<br />

Pressure Control Valve<br />

Pressure<br />

Sensing Line<br />

Pilot Operated<br />

Pressure Control Valve<br />

Pressure<br />

Sensing Line<br />

Pilot Operated<br />

Pressure Control Valve<br />

Safety<br />

Valve<br />

Select inlet piping for reasonable<br />

velocity and expand downstream<br />

for equal flow rate.<br />

Safety<br />

Valve<br />

Drip<br />

Pan<br />

Elbow<br />

Reduced<br />

Steam<br />

Pressure<br />

Drip<br />

Pan<br />

Elbow<br />

Reduced<br />

Steam<br />

Pressure<br />

Set lead valve 2 psi above desired<br />

set pressure and set lag valve 2 psi<br />

below desired set pressure.<br />

89<br />

HOOK-UP DIAGRAMS

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