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FLOW DIVERTOR BALL VALVE

DN20 DN32 DN50

Bestobell Valves, President Park, President Way, Sheffield, S4 7URTel: + 44 (0) 114 224 0000 Fax: + 44 (0) 114 278 4974

E-mail sales@bestobellvalves.comWebsite: http://www.bestobellvalves.com

Rev No: 823.10.06

Bestobell Valves is a world leader in the design and manufacture ofcryogenic valves, recognised globally for product quality andinnovation. Our valves are used with numerous cryogenic liquefiedgases including oxygen, carbon dioxide, nitrogen, liquid natural gas(LNG) and argon. Bestobell Valves manufactures for a wide rangeof applications and in a comprehensive range of materials.

It is essential that a cryogenic liquid storage vessel is alwaysprotected by a relief valve. If only one relief valve was fitted to thevessel it would be impossible to disconnect for routine maintenanceor checking of lifting pressures without prejudicing the safety of the

vessel.

For this reason, all cryogenic storage tanks require two relief valves tobe connected to the tank via a flow diverter valve. This allows onerelief valve to remain connected to the vessel while the otherundergoes maintenance.

The Bestobell flow diverter is a quarter turn ball valve design allowingfor fats changeover between relief valves. It is available in a verywide range of configurations to suit the customers requirements. Thevalve comprises three main components: the centre bodyincorporating the inlet port, ball and operating lever, and the two endadaptors incorporating the various outlet ports. It is available in threebasic sizes (DN20, DN32, DN50) determined by the diameter of theflow passages through the ball.

This valve is usually at the hub of a fairly complex piping system andmany variations on the basic design have evolved to suit customersspecific requirements. An outline of the various options is givenbelow for simplicity; the centre body is described separately from theend flanges.

All valves are degreased for oxygen duty, assembled in clean roomconditions, and sealed in robust polythene bags prior to despatch

(Subject to end connections and material)

50bar

T PortThe position of the entry port helps the system designer to fit thevalve into the particular space and position he has available. With thebottom entry valve, the inlet port is on the opposite side of the centrebody from the opening lever (see drawing). The front entry valve hasthe inlet port on the face at 90 to the operating lever (photograph).The DN20, DN32 and DN50 valves are available with bottom or frontentry configurations.

Description

Maximum Working Pressure

Features and Benefits

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