FlowDivertorBallValveDN20DN500 pages

"

Bestobell

nnnn

Cryogenic Valves

nnnn

Flow Divertor Ball Valve

nnnn

DN20-DN50

nnnn

Description

nnnn

It is essential that a cryogenic liquid storage vessel is always protected by

nnnn

a relief valve. If only one relief valve was fitted to the vessel it would be

nnnn

impossible to disconnect for routine maintenance or checking of lifting

nnnn

pressures without prejudicing the safety of the vessel.

nnnn

For this reason, all cryogenic storage tanks require two relief valves to

nnnn

be connected to the tank via a flow divertor valve. This allows one relief

nnnn

valve to remain connected to the vessel while the other undergoes

nnnn

maintenance.

nnnn

The Bestobell flow divertor is a quarter turn ball valve design allowing

nnnn

for fast changeover between relief valves. It is available in a very wide

nnnn

range of configurations to suit the customer's requirements. The valve

nnnn

comprises three main components: the centre body incorporating

nnnn

the inlet port, ball and operating lever, and the two end adaptors

nnnn

incorporating the various outlet ports. It is available in four basic sizes

nnnn

(DN20, DN25, DN32 and DN50) determined by the diameter of the flow

nnnn

passages through the ball.

nnnn

This valve is usually at the hub of a fairly complex piping system and

nnnn

many variations on the basic design have evolved to suit customers'

nnnn

specific requirements. An outline of the various options is given below for

nnnn

simplicity; the centre body is described separately from the end flanges.

nnnn

All valves are degreased for oxygen duty, assembled in clean room

nnnn

conditions, and sealed in robust polythene bags prior to despatch

nnnn

T

nnnn

Maximum Working Pressure (MWP)

nnnn

(Subject to end connections and material)

nnnn

50bar (725psi) At -196°c to +65°c

nnnn

Features

nnnn

TPort

nnnn

The position of the entry port helps the system designer to fit the valve

nnnn

into the particular space and position he has available. With the bottom

nnnn

entry valve, the inlet port is on the opposite side of the centre body from

nnnn

the opening lever (see drawing). The front entry valve has the inlet port

nnnn

on the face at 90° to the operating lever (photograph). The DN20, DN32

nnnn

and DN50 valves are available with bottom or front entry configurations.

nnnn

Technical

nnnn

ISO 9001 accreditation - designed and manufacture

nnnn

to ASTM B31.3& BSEN1626.

nnnn

Optional full material traceability backed by BSEN

nnnn

10204 3.1 B/3.1 Certification

nnnn

Designed and engineered for use with 02, N2, Ar,

nnnn

C02, He, Kr, Ne, H2,

nnnn

C2H4, N20 service

nnnn

C € Marking according to Pressure Equipment

nnnn

Directive 97/23/EC.

nnnn

TT Marking to Directive 99/36/EC only on written

nnnn

request complete with purchase order.

nnnn

For other options please contact us.

nnnn

T+44(0) 114 224 0000

nnnn

F+44(0) 114 2784974

nnnn

sales@bestobellvalves.com

nnnn

www.bestobellvalves.com

nnnn

Bestobell, President Park, President Way, Sheffield, S4 7UR

nnnn

United Kingdom

"