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2000 Hook-up Book - Spirax Sarco

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HOOK-UP DIAGRAMS<br />

90<br />

Figure II-14<br />

Series Pressure Reducing Valve Station for High Turndown Rations<br />

Steam<br />

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

Moisture<br />

Separator<br />

Strainer Strainer<br />

Strainer<br />

Spira-tec<br />

Loss<br />

Detector<br />

Pilot Operated<br />

Pressure Control Valve<br />

Float &<br />

Thermostatic<br />

Steam Trap<br />

Pressure<br />

Sensing<br />

Line<br />

Strainer<br />

Figure II-15<br />

<strong>Hook</strong>-<strong>up</strong> for Remote Operation of 25 PRM Pressure Reducing Valve<br />

Steam<br />

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

Moisture<br />

Separator<br />

Strainer<br />

Strainer<br />

Float &<br />

Thermostatic<br />

Steam Trap<br />

Limit pilot to 15 ft. drop below main<br />

valve and drain all s<strong>up</strong>ply tubing. If<br />

pilot is mounted above main valve,<br />

pilot line drip traps can be eliminated.<br />

For longer distance an air loaded<br />

pilot should be used.<br />

1/2" Pipe<br />

Check<br />

Valve<br />

Check<br />

Valve<br />

Spira-tec<br />

Loss<br />

Detector<br />

Pressure<br />

Sensing<br />

Line<br />

Pilot Operated<br />

Pressure Control Valve<br />

Check<br />

Valve<br />

Float &<br />

Thermostatic<br />

Steam Trap<br />

Note: Intermediate pressure takeoff requires an additional safety valve.<br />

5/16" Copper<br />

Tubing or 1/4" Pipe<br />

Main<br />

Control Valve<br />

Remote<br />

Pressure<br />

Pilot<br />

Float &<br />

Thermostatic<br />

Steam Trap<br />

Check<br />

Valve<br />

Noise Diffuser<br />

(if required)<br />

Safety<br />

Valve<br />

Float &<br />

Thermostatic<br />

Steam Trap<br />

Check<br />

Valve<br />

Safety<br />

Valve<br />

Reduced<br />

Steam<br />

Pressure<br />

Drip<br />

Pan<br />

Elbow<br />

Reduced<br />

Steam<br />

Pressure<br />

Drip<br />

Pan<br />

Elbow

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