DFN Series Block & Bleed Needle Valves A range of flanged Needle Valves with the option of Primary Isolate, Primary Isolate & Vent & Primary & Secondary Isolate & Vent. A range of flanged Needle Valves with the option of Primary Isolate, Primary Isolate & Vent & Primary & Secondary Isolate & Vent. They compliment each other with the needle valve type for flow control. Pressure rating are by flange rating although the valve ratings are in excess of these. Vent Ports plugged. View PDF Datasheet Want to know more? If you would like to inquire further about the DFN Series Block & Bleed Needle Valves please contact one of our service representatives at 01422 377 999 or by email at sales@colson.co.uk.
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