CryogenicEmergencyShutOffGateValve0 pages

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Bestobell

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Cryogenic Valves

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Cryogenic Emergency Shut Off Gate Valve

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Bolted Bonnet - Pneumatic Actuator

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DN40-DN80 0 1/2"-4")

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Description

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Stainless steel cryogenic emergency shut off gate valve with bolted bonnet and

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integral pneumatic actuator. Fail safe and automatic operation. The valve is

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held open by pneumatic air pressure and closes automatically on air vent or the

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loss of the pneumatic air supply pressure, for whatever reason.

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The bellows type pneumatic actuator includes a single convoluted air spring

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actuator of rubber connections with manual override.

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The valve has a wedge seat design for tight shut off to seal on the downstream

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seat only in order to prevent liquid lock. The bolted bonnet allows for simple site

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maintenance, with easy access to the serviceable parts of the valve.

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

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and pressure tested prior to despatch.

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Maximum Working Pressure (MWP)

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(Subject to end connection)

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40 bar (580 psi) at -196°C to +65°C

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8 bar (120 psi) maximum actuator inlet pressure

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3 bar (44 psi) minimum actuator inlet pressure

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Features

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• Unique Bestobell gate valve design with complete removal of the wedge and

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body seat with the headwork (DN50 - DN80). This enables the removable seat

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to have a lapped finish, instead of a standard machined finish, giving superior

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shut off and greatly increased life of the PTFE seal. The seat itself can also be

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replaced, eliminating the need to cut out the valve body from the line once

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seat damage has occurred, as required with all other gate valves thus reducing

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whole life costs

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• Bestobell "Flexi-wedge" (DN40 - DN 80) phosphor bronze disc with PTFE

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seal, mounted within the stainless steel wedge, for tight shut off in cryogenic

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conditions despite the thermal expansion and contraction. This design also

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allows cost effective replacement of the valve disc

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• Bellows type pneumatic actuator with manual override for simple reliable

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operation

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• Bolted bonnet design for easy removal of headworks even in confined spaces

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• Lightweight design gives excellent thermal characteristics

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• Welded high strength extension tube

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• Full bore for high CV value and minimal flow restriction through the valve

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Technical

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Stainless steel automatic shut off gate valve

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with bolted bonnet and integral pneumatic tyre

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actuator. Complete with manual override.

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ISO 9001 accreditation - designed and manufacture

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to ASTM B31.3&BSEN1626.

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Optional full material traceability backed by BSEN

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10204 3.1 / 3.2 Certification.

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

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C02, He, Kr, Ne, H2, C2H4 and N20 service.

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C € Marking according to Pressure Equipment

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Directive 97/23/EC.

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

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request complete with purchase order.

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For other options please contact us.

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T+44(0) 114 224 0000

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F+44(0) 114 2784974

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sales@bestobellvalves.com

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www.bestobellvalves.com

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

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United Kingdom

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