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Quick Opening Closure doors

BANDLOCK HIGH PRESSURE
QUICK OPENING CLOSURE
TOOS HENGAM ENGINEERING COMPANY
TEL/FAX:(9851)36232501-4 WWW.THECO.IR MASHAD-IRAN
E-MAIL : info@theco.ir p.o.box:91895-139
BANDLOCK CLOSURES
provide horizontal or vertical access to
pipeline Pig Traps, Filters, Coalescers,
Separators, or any pressure vessel in seconds.
Compared with other quick opening closures
they can be operated at remarkable speed.
Computer-aided techniques have figured in
the design.The main pressure-loaded sections
are sized for economy in weight by
employing finite element analytical techniques
and proof testing by strain gauges, with
reference to primary pressure vessel codes.
The proven locking band mechanism which
gives the range its name is a duplex stainless
steel conical thrust ring fitted between the
door and neck to transmit loads uniformly to
the full 360° circumference of the neck.
Safety Devices
A hand operated pressure warning screw –
integrated into the mechanism – prevents the
door being unlocked until confirmation is
available that the vessel’s internal pressure
has been relieved. A non-bleed type pressure
warning device can be provided in toxic or
sour service. Secondary safety features
including key and valve interlocks can also be
fitted. Safety is therefore inherent in the
BANDLOCK.The complete visibility of the
locking band at all times satisfies design code
requirements and the Operator can actually
see that the door is securely closed.
Design Features
Door Hinging
For HORIZONTAL use the door is double pivoted on investment cast
hinges with self-lubricating bearings. Bolted fitment permits adjustment
for wear and can be specified for right or left swing. A handwheel
operated gearbox can be fitted as an additional cost feature to
facilitate controlled easy opening of larger diameter doors.
VERTICAL installation includes a davit which enables the BANDLOCK
door to be lifted and swung clear of the neck. Above 30″ diameter
lifting eye bolts are normally fitted in lieu of the davit.
BANDLOCK High Pressure End Closure
TEL/FAX:(9851)36232501-4 WWW.THECO.IR MASHAD-IRAN E-MAIL : info@theco.ir p.o.box:91895-139
TOOS HENGAM ENGINEERING COMPANY
Unique Seal
The purpose designed servo acting double edged lip seal energises at zero pressure. It is housed in the door face for
protection and long life and is easily fitted without tools.The one piece moulding is available in a range of elastomers
and at the highest pressure, incorporates a stainless steel spring to prevent extrusion and provide a full vacuum
capability.
Seal Material
Standard seal is Nitrile
with shore hardness
of 75°.Viton,
Polyurethane and
explosive
decompression
resistant Fluorocarbon
rubbers are available.
Temperature range is
-۵۰° to +220°C
according to the
elastomer specified.
Hydrostatic Testing
Normally carried out as part of the final vessel test
but individual closure hydrotest can be provided at extra cost.
Design
Standard units meet PD 5500. All other international pressure vessel codes including ASME VIII Div 1 and 2 can be
met.The design is approved by major worldwide Oil/Gas Authorities and companies.
Size and Pressure Range
۶ inch – 56 inch Diameters with neck hub sized for welding to any diameter and thickness in pressures to ANSI Class
۲۵۰۰ (۴۲۵ Bar working pressure).
Non-Destructive Examination
Ultrasonic examination with acceptance levels to ASME VIII Div 2 Para AM203-2 (C) to (F) on blank forgings and
plate (except necks ≤۲۴″ diameter).
Materials
Forged steel necks with forged or plate doors to meet international material specifications. Materials meeting the
requirements of ASTM Standard latest can be supplied .
servo seal
neck
door
band in
locked
position
band in
unlocked
position
TEL/FAX:(9851)36232501-4 WWW.THECO.IR MASHAD-IRAN E-MAIL : info@theco.ir p.o.box:91895-139
TOOS HENGAM ENGINEERING COMPANY
Dimensional Data
BANDLOCK CLOSURE CLASS 600

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