PAAS SB V4.6

Industrial Grey PVC-U Pipe And Fittings Industrial Grey PVC-U Valves

PVC-U Ventilation Valve Type 591

• Low investment cost • Long lifetime of valves

• Suitable for use as an air bleed valve • Assist in preventing run dry situations • Also can be used on tanks or pipes to prevent negative pressures / vacuum • PVC body with PP float

PVC-U Ventilation Valve Type 591

 PP-H Cone / No Spring

SIZE PN 1/2” 16 3/4” 16

EPDM

FPM

161 591 102 161 591 103 161 591 104 161 591 105 161 591 106 161 591 107 161 591 108 161 591 109

161 591 112 161 591 113 161 591 114 161 591 115 161 591 116 161 591 117 161 591 118 161 591 119

1” 16

1.25” 16

1.5” 16

2” 16

2.5” 16

3” 16

4” 16

161 591 110

161 591 120

Operation: Deaerate when filling - aerate when emptying

Depending on the filling speed, the float is lifted by the rising level of the liquid. At the same time, gases are removed from the system through the valve. When the pipeline or the storage tank is completely full, the float is pressed into the profile seal and closes the valve. The system is now completely deaerated. When the liquid level sinks as a result of draining, the valve automatically opens again and air can flow in.

Valve Open

Float rises when filling > Deaerate

Valve closed and sealed tight

Float sinks when draining > aerate

28 PAAS Source Book

www.paas.com.au

V 4.6

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