The cross directs the flow and removes the swirl from swirl diffusers.
Without a cross the measured value could be too high.
The textile cross is fasten inside the 650×650 hood with a velcro-type fastening. The cross fits 650×650 SwemaFlow 126 hood with part.no. 769640.
(Velcro-type fastening can be retrofitted in a SwemaFlow 125 650×650 hood – use part no. 769710 when ordering.)
