Vessel

Spherical Vessel

Name: Spherical Vessel
Brand: Lata Scientific
SKU: spherical-vessel
Availability: InStock

Borosilicate spherical vessel, 5 L to 200 L

Borosilicate spherical vessel from 5 to 200 litres, in a single neck build and a three neck build with bottom outlet — for reaction, receiving and storage duty on a glass plant.

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At a glance
Product type	Borosilicate spherical vessel
Material	Borosilicate 3.3
Nominal capacity range	5 L to 200 L in six sizes
Working capacity range	4 L to 200 L — see the general data table
Maximum pressure	1.0 bar at 5 L, falling to 0.2 bar at 200 L
Builds	Single neck (AVSA series); three neck with bottom outlet (AVSM series)
Neck size range	DN 40 to DN 225, capacity dependent
Side neck / outlet sizes	DN 25 or DN 40 on the AVSM build, capacity dependent

Product overview

What it does, and where it fits.

The sphere is the strongest shape glass can be blown into, and it is why the vessels in this range hold more pressure for their wall thickness than any cylindrical equivalent. There is no corner to concentrate stress and no flat end to bow, so the load spreads evenly through the whole wall. That is also why the catalogue's maximum pressure figure falls as the vessels get bigger — the same wall has to carry a much larger sphere.

Two builds are listed. The single neck vessel (AVSA series) is the simpler item: one top connection, used as a receiver, a feed vessel or a storage bulb. The three neck with bottom outlet vessel (AVSM series) is the process build — a large centre neck for the main connection, two smaller necks for a charge line, a thermometer pocket, a reflux return or an instrument, and a bottom outlet to empty the vessel completely rather than pumping it out through the top.

Read the general data table before the dimension tables. Nominal capacity is the range name, but bulb capacity and working capacity are the figures that matter in practice: a 50 L vessel has a 62 L bulb and 58 L of working volume, and a 200 L vessel works at exactly 200 L against a 212 L bulb. Size the vessel on working capacity and confirm the pressure figure for that size against your duty.

Both builds share the same six nominal sizes — 5, 10, 20, 50, 100 and 200 litres — so the general data applies to either. What changes between them is overall height L and the neck arrangement: the AVSM build is taller at every size because the bottom outlet adds to the overall height.

Features

Built into every unit.

Spherical body — the strongest form for a glass pressure vessel
Six nominal sizes from 5 L to 200 L, common to both builds
Single neck build (AVSA) and three neck with bottom outlet build (AVSM)
Bottom outlet on the AVSM build empties the vessel completely
Maximum pressure published for every size, 1.0 bar at 5 L to 0.2 bar at 200 L
Borosilicate 3.3 throughout — fully transparent, the batch stays visible

Benefits

Why it earns its place in the line.

Even stress distribution — no corners or flat ends to concentrate load
The whole batch is visible: colour, phase separation and level, without instrumentation
Inert to almost all process media; no metal in the wetted path
Bolts into the borosilicate pipeline range on the same beaded ends and backing flanges
Smooth internal surface resists fouling and cleans down between batches
Bottom outlet build drains without a transfer pump and leaves no residual heel to speak of

Applications & industries

Where it is specified.

Typical applications

Reaction and receiving vessels on a glass process line
Distillate receivers under a fractionating column
Feed and charge vessels for a pilot plant train
Solvent recovery and intermediate storage
Batch processes that must stay visible from charge to discharge
Corrosive acid, alkali and solvent service where metal is unacceptable

Industries served

Chemical processing
Pharmaceutical
Fine chemicals & dyes
Distillation & solvent recovery
Water & effluent treatment
Agrochemicals
Research & pilot plant

Technical data

Specification for Spherical Vessel.

Figures below are for this product only — every item in the range carries its own dimension table.

Spherical Vessel — technical specification
Product type	Borosilicate spherical vessel
Material	Borosilicate 3.3
Nominal capacity range	5 L to 200 L in six sizes
Working capacity range	4 L to 200 L — see the general data table
Maximum pressure	1.0 bar at 5 L, falling to 0.2 bar at 200 L
Builds	Single neck (AVSA series); three neck with bottom outlet (AVSM series)
Neck size range	DN 40 to DN 225, capacity dependent
Side neck / outlet sizes	DN 25 or DN 40 on the AVSM build, capacity dependent
Overall height	300 mm to 1000 mm single neck; 425 mm to 1175 mm three neck
End connection	Beaded glass ends with backing flanges and PTFE-envelope gaskets
Flange drilling	See the drilling table — BS 10 Table E, BS 10 Table F and ASA drilling available
Temperature rating	Not published on the catalogue page — confirm with us for your duty
Catalogue reference	AVSA series (single neck), AVSM series (three neck & bottom outlet)

Dimension schematic of a borosilicate spherical vessel in both catalogue builds — single neck with DN and overall height L, and three neck with bottom outlet showing DN, DN1, DN2 and L — Dimension references — letters match the table.

Spherical Vessel with Single Neck — dimensions

Cat. Ref.	Nominal Capacity	L	DN
AVSA5	5 L	300	40
AVSA10	10 L	375	40
AVSA20	20 L	450	80
AVSA50	50 L	650	100
AVSA100	100 L	750	150
AVSA200	200 L	1000	225

All dimensions in mm, transcribed exactly from the catalogue page. L is the overall height and DN the single top neck. The left-hand view on the drawing is this build.

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Spherical Vessel with Three Neck & Bottom Outlet — dimensions

Cat. Ref.	Nominal Capacity	L	DN	DN1	DN2
AVSM5	5 L	425	40	25	25
AVSM10	10 L	500	40	25	25
AVSM20	20 L	575	80	25	25
AVSM50	50 L	825	100	40	40
AVSM100	100 L	925	150	40	40
AVSM200	200 L	1175	225	40	40

All dimensions in mm, transcribed exactly from the catalogue page. L is the overall height and DN the centre neck. DN1 and DN2 are the smaller connections, and the catalogue prints them with identical values on every row — 25 mm up to 20 L and 40 mm from 50 L up. The right-hand view on the drawing shows the arrangement; state which connection you need each size on when ordering. This build is taller than the single neck vessel at every capacity because the bottom outlet adds to the overall height.

FAQ

Questions we are asked about this item.

Nominal capacity is the size the vessel is sold as. Bulb capacity is the volume the sphere actually holds, and working capacity is what you can use — 58 L on a 50 L vessel, 111 L on a 100 L. All three are printed in the general data table on the category page. Size on working capacity.

Because the same wall has to carry a much larger sphere. The catalogue publishes 1.0 bar at 5 L and 0.2 bar at 200 L, and every size in between. Check the figure for your size against your duty before ordering.

The single neck AVSA build is a receiver, feed or storage vessel. The three neck AVSM build is the process build — centre neck for the main connection, two smaller necks for charging, instrumentation or reflux, and a bottom outlet to drain it. If you need to empty the vessel completely, you need the bottom outlet.

Yes — the Bottom Outlet Valve in the Glass Valves range is made for exactly this. The catalogue notes it can be incorporated in any spherical or cylindrical vessel, and it seats at the vessel floor so nothing accumulates in the outlet.

The catalogue page for this range is dimensional apart from the pressure column, and publishes no temperature figure, so we do not quote one. Send us your duty and we will confirm it against the drawing.