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SERIES 851/25 DOUBLE ORIFICE AIR VALVE, PN16
The Series 851/25 (Fig 1271) Double Orifice Air Relief Valve is for use with potable water and is suitable for large volume air outflow and inflow as well as releasing air during pressurized operation.

Features

• Aerokinetic design ensuring valve does not seal prematurely
• Full bore outlet allowing optimum discharge
• Low sealing pressure
• ABS internals

BODY/COVER
Ductile Iron - BS EN 1563

INTERNALS
ABS Plastic

FASTENERS
Stailess Steel Gr A4

COATING
(internally and externally)
Epoxy (300 microns) -
WIS 4-52-01 Class B

CONNECTION
BS EN 1092-2, PN16




DN
(mm)

PN
(bar)

Weight
(kg)

Stock
Group

851-050-20122000 400/050 16
20.8
A
851-080-00122000
400/80 taper
16
21

A

851-080-20122000

600/080

16
32
A
851-100-20122000
900/100
16
52

A

851-150-20122000
1000/150
16
73
A


Glenfield Valves Limited

Telephone+44 (0) 1563 521150

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