370
K. S. Kulkarni and R. Adivarekar
Fig. 27 Proportionate valve
to control steam
usually fitted with frequency controlled drives and torque motors which maintains
smooth flow of fabric and prevents crease formation. Load cells are used to measure
fabric tension and compensator for drive control.
Roller Bed or Conveyer Bed
Steamer is equipped with roller bed or conveyer bed for transportation of fabric with
required dwell time with respect to the type of fabric being processed. A plaiter is used
to plait the fabric so that more amount of fabric is accommodated and desired dwell
time is achieved. The strokes by plaiter is adjusted by using frequency converter.
Steam control: Desired quantity of steam is required to be introduced in the reaction chamber to achieve best results. This is achieved by using proportionate control
valves (Fig. 27).
2.5.6 Post-washer
The post washing module washes out the residual chemicals from the fabric precisely
and counter flow in washing tank gives high degree of efficiency. For better quality
result and to minimize fresh water intake, reuse post washer liquor to pre washer by
adding feed water pump having required flow rate can be used (Fig. 28).
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