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480 / 485 / 490 – Bailey Birkett By-Pass & Relief Valve

For use with positive displacement pumps either of the rotary or reciprocating type and have been used successfully with water. It can also be used as a relief or combined relief and bypass valve and can be modified to operate as an integral pump by-pass relief valve. Supplied set to your requirements with a certificate confirming lift pressure at no additional cost.

By-Pass • Side Discharge • Dome Top
Size & Connections
20mm (3/4″) to 80mm (3″) BSP Threaded
Most Liquids that are compatible with materials
Bronze Body (480 & 485) • Stainless Steel Body (490)
Set Pressure Range
0.35 to 24 bar (dependent on size)
Bronze: -20°C to 120°C • Stainless Steel: -20°C to 200°C 
Compliance & Approvals
BS6759 Part 3
Contact Us480/485/490 – Bailey Birkett By-Pass & Relief Valve - PDF DatasheetCertificated to BS6759 StandardsBailey Birkett part of Emerson

480/485/490 – Bailey Birkett By-Pass & Relief Valve