Cryogenic Emergency Shut Off Gate Valve0 pages

Cryogenic Emergency Shut Off Gate Valve
Bolted Bonnet - Pneumatic Actuator
DN40 - DN80 (1 1/2”- 4”)
Description
Stainless steel cryogenic emergency shut off gate valve with bolted bonnet and
integral pneumatic actuator. Fail safe and automatic operation. The valve is
held open by pneumatic air pressure and closes automatically on air vent or the
loss of the pneumatic air supply pressure, for whatever reason.
The bellows type pneumatic actuator includes a single convoluted air spring
actuator of rubber connections with manual override.
The valve has a wedge seat design for tight shut off to seal on the downstream
seat only in order to prevent liquid lock. The bolted bonnet allows for simple site
maintenance, with easy access to the serviceable parts of the valve.
All valves are degreased for oxygen duty, assembled in clean room conditions
and pressure tested prior to despatch.

Maximum Working Pressure (MWP)
(Subject to end connection)
40 bar (580 psi) at –196°C to +65°C
8 bar (120 psi) maximum actuator inlet pressure
3 bar (44 psi) minimum actuator inlet pressure

Features

Technical

• Unique Bestobell gate valve design with complete removal of the wedge and
body seat with the headwork (DN50 – DN80). This enables the removable seat
to have a lapped finish, instead of a standard machined finish, giving superior
shut off and greatly increased life of the PTFE seal. The seat itself can also be
replaced, eliminating the need to cut out the valve body from the line once
seat damage has occurred, as required with all other gate valves thus reducing
whole life costs

Stainless steel automatic shut off gate valve
with bolted bonnet and integral pneumatic tyre
actuator. Complete with manual override.

• Bestobell “Flexi-wedge” (DN40 – DN 80) phosphor bronze disc with PTFE
seal, mounted within the stainless steel wedge, for tight shut off in cryogenic
conditions despite the thermal expansion and contraction. This design also
allows cost effective replacement of the valve disc
• Bellows type pneumatic actuator with manual override for simple reliable
operation

ISO 9001 accreditation – designed and manufacture
to ASTM B31.3 & BSEN1626.
Optional full material traceability backed by BSEN
10204 3.1 / 3.2 Certification.
Designed and engineered for use with O2, N2, Ar,
CO2, He, Kr, Ne, H2, C2H4 and N2O service.
Marking according to Pressure Equipment
Directive 97/23/EC.

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

π Marking to Directive 99/36/EC only on written
request complete with purchase order.

• Lightweight design gives excellent thermal characteristics

For other options please contact us.

• Welded high strength extension tube
• Full bore for high CV value and minimal flow restriction through the valve
Ref: 0000 05/11

T +44 (0) 114 224 0000

sales@bestobellvalves.com

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

F +44 (0) 114 278 4974

www.bestobellvalves.com

United Kingdom