Glass Valves

Straight Through Valve

Name: Straight Through Valve
Brand: Lata Scientific
SKU: straight-through-valve
Availability: InStock

Glass straight through valve, DN 15 to DN 50

Borosilicate glass straight through valve with a PTFE spindle — full-bore isolation in a glass line, DN 15 to DN 50, in five catalogue sizes.

Request a quotation Full technical data and dimensions Request the datasheet

At a glance
Product type	Glass straight through valve
Material	Borosilicate 3.3
Spindle	PTFE
Nominal bore range	DN 15 to DN 50
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
Pressure rating	Not published on the valve catalogue page — confirm with us for your duty
Temperature rating	Not published on the valve catalogue page — confirm with us for your duty

Product overview

What it does, and where it fits.

The straight through valve is the general-purpose isolation valve of a glass pipeline. Flow passes through the body in line, and the PTFE spindle closes onto the seat to shut it off. Because the body is borosilicate, the operator can see both the media and the state of the valve without opening anything.

The catalogue prints one line under this table that matters more than it looks: the spindle is made of PTFE. That is what lets the valve run unlubricated on aggressive media without seizing, galling or contaminating the batch — the two materials in contact with the process are glass and PTFE, nothing else.

Five references cover DN 15 to DN 50. Note LSPV1.5/1, which is a reducing build: a DN 40 line connection with a DN 25 branch, at the same 225 mm length as the full-bore DN 40.

Features

Built into every unit.

PTFE spindle — the catalogue's own note for this valve
Borosilicate 3.3 body; wetted parts are glass and PTFE only
DN 15 to DN 50 in five catalogue references
Face to face 125 mm to 300 mm
Reducing build available (LSPV1.5/1: DN 40 line, DN 25 branch)

Benefits

Why it earns its place in the line.

Fully transparent — the operator can see the valve position and the media through the body
Inert to almost all process media; no metal in the wetted path
PTFE spindle: no lubrication, no seizing, no contamination of the batch
Bolts straight into the borosilicate pipeline range with the same beaded ends and backing flanges
Smooth bore resists fouling and cleans down easily

Applications & industries

Where it is specified.

Typical applications

Primary isolation on borosilicate glass process lines
Batch charging and discharge on glass reactors
Corrosive acid, alkali and solvent service
Pilot plant and kilo-lab lines where the process must stay visible

Industries served

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

Technical data

Specification for Straight Through Valve.

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

Straight Through Valve — technical specification
Product type	Glass straight through valve
Material	Borosilicate 3.3
Spindle	PTFE
Nominal bore range	DN 15 to DN 50
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
Pressure rating	Not published on the valve catalogue page — confirm with us for your duty
Temperature rating	Not published on the valve catalogue page — confirm with us for your duty
Catalogue reference	LSPV series, e.g. LSPV1.5 = DN 40
Face to face	125 mm to 300 mm

Dimension schematic of a borosilicate glass straight through valve showing DN, DN1, d, L and H — Dimension references — letters match the table.

Straight Through Valve — dimensions

Cat. Ref.	DN	DN1	d	L	H
LSPV07	15	15	12	125	90
LSPV1	25	25	18	175	175
LSPV1.5/1	40	25	18	225	175
LSPV1.5	40	40	26	225	200
LSPV2	50	50	38	300	220

All dimensions in mm, transcribed exactly from the catalogue page. The catalogue adds one note to this table: “Spindle is made of PTFE.”

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FAQ

Questions we are asked about this item.

PTFE — the catalogue states it explicitly for this valve. It runs unlubricated, will not seize on aggressive media, and keeps the wetted path to glass and PTFE only.

A reducing build: DN 40 on the line side and DN 25 on the branch, at the same 225 mm face-to-face as the full-bore DN 40 (LSPV1.5).

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