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CryogenicEmergencyShutOffGateValve0 pages
Bestobell
nnnnCryogenic Valves
nnnnCryogenic Emergency Shut Off Gate Valve
nnnnBolted Bonnet - Pneumatic Actuator
nnnnDN40-DN80 0 1/2"-4")
nnnnDescription
nnnnStainless steel cryogenic emergency shut off gate valve with bolted bonnet and
nnnnintegral pneumatic actuator. Fail safe and automatic operation. The valve is
nnnnheld open by pneumatic air pressure and closes automatically on air vent or the
nnnnloss of the pneumatic air supply pressure, for whatever reason.
nnnnThe bellows type pneumatic actuator includes a single convoluted air spring
nnnnactuator of rubber connections with manual override.
nnnnThe valve has a wedge seat design for tight shut off to seal on the downstream
nnnnseat only in order to prevent liquid lock. The bolted bonnet allows for simple site
nnnnmaintenance, with easy access to the serviceable parts of the valve.
nnnnAll valves are degreased for oxygen duty, assembled in clean room conditions
nnnnand pressure tested prior to despatch.
nnnnMaximum Working Pressure (MWP)
nnnn(Subject to end connection)
nnnn40 bar (580 psi) at -196°C to +65°C
nnnn8 bar (120 psi) maximum actuator inlet pressure
nnnn3 bar (44 psi) minimum actuator inlet pressure
nnnnFeatures
nnnn• Unique Bestobell gate valve design with complete removal of the wedge and
nnnnbody seat with the headwork (DN50 - DN80). This enables the removable seat
nnnnto have a lapped finish, instead of a standard machined finish, giving superior
nnnnshut off and greatly increased life of the PTFE seal. The seat itself can also be
nnnnreplaced, eliminating the need to cut out the valve body from the line once
nnnnseat damage has occurred, as required with all other gate valves thus reducing
nnnnwhole life costs
nnnn• Bestobell "Flexi-wedge" (DN40 - DN 80) phosphor bronze disc with PTFE
nnnnseal, mounted within the stainless steel wedge, for tight shut off in cryogenic
nnnnconditions despite the thermal expansion and contraction. This design also
nnnnallows cost effective replacement of the valve disc
nnnn• Bellows type pneumatic actuator with manual override for simple reliable
nnnnoperation
nnnn• Bolted bonnet design for easy removal of headworks even in confined spaces
nnnn• Lightweight design gives excellent thermal characteristics
nnnn• Welded high strength extension tube
nnnn• Full bore for high CV value and minimal flow restriction through the valve
nnnnTechnical
nnnnStainless steel automatic shut off gate valve
nnnnwith bolted bonnet and integral pneumatic tyre
nnnnactuator. Complete with manual override.
nnnnISO 9001 accreditation - designed and manufacture
nnnnto ASTM B31.3&BSEN1626.
nnnnOptional full material traceability backed by BSEN
nnnn10204 3.1 / 3.2 Certification.
nnnnDesigned and engineered for use with 02, N2, Ar,
nnnnC02, He, Kr, Ne, H2, C2H4 and N20 service.
nnnnC € Marking according to Pressure Equipment
nnnnDirective 97/23/EC.
nnnnTT Marking to Directive 99/36/EC only on written
nnnnrequest complete with purchase order.
nnnnFor other options please contact us.
nnnnT+44(0) 114 224 0000
nnnnF+44(0) 114 2784974
nnnnsales@bestobellvalves.com
nnnnwww.bestobellvalves.com
nnnnBestobell, President Park, President Way, Sheffield, S4 7UR
nnnnUnited Kingdom
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