Boiler house Level controls
2
Operation of sequencing valve With the handwheel turned fully anticlockwise the valve is in the NORMAL WORKING position and the back seating shuts off the drain connection. Slowly turn the handwheel clockwise until the indicating pointer is at the first PAUSE position. The chamber connection is closed, the drain connection is open, and the water connection is blown through. Pause for 5 to 8 seconds. Slowly move the handwheel further clockwise to full travel. The water connection is closed, the drain valve remains open, and the chamber and steam connections are blown through. Pause for 5 to 8 seconds. The low level alarm should sound. Slowly turn the handwheel fully clockwise to shut-off against the back seating in the NORMAL WORKING position.
Valve sequence
2.3 81
Position 1
Position 2
Position 3
How to order Example : 1 off Spirax Sarco DN25 SPV3 sequencing purge valve with flanged connections to EN 1092 PN40.
TI-P402-42 AB Issue 4
Page 3 of 3
SPV1 and SPV3 Sequencing Purge Valves
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