Glass Valves

Drain Valve

Name: Drain Valve
Brand: Lata Scientific
SKU: drain-valve
Availability: InStock

Glass drain valve, DN 15 to DN 50

Borosilicate glass drain valve for emptying the low point of a glass line or vessel — DN 15 to DN 50 with a tapered drain outlet from 14 mm to 50 mm.

Request a quotation Full technical data and dimensions Request the datasheet

At a glance
Product type	Glass drain 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.

A drain valve sits at the low point of a run or under a vessel and empties it completely. It shares the body, bore and face-to-face dimensions of the straight through valve, but adds a tapered drain leg below the seat — the D dimension in the table — so the contents fall clear instead of pooling above a horizontal outlet.

That D dimension is the one to check when setting out: it grows from 14 mm at DN 15 to 50 mm at DN 50, and it determines both the discharge rate and the clearance you need below the valve for a receiver.

Features

Built into every unit.

Tapered drain leg — no pooling above the outlet
Outlet diameter D from 14 mm at DN 15 to 50 mm at DN 50
Dimensionally matched to the straight through valve on DN, d, L and H
Borosilicate 3.3 body with PTFE spindle
DN 15 to DN 50 in five catalogue references

Benefits

Why it earns its place in the line.

Empties the line or vessel completely between batches
Visible discharge — the operator can see when it has run clear
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

Draining the low point of a glass pipeline
Vessel and receiver bottom discharge
Sampling from the base of a run
Emptying between batches to prevent cross-contamination

Industries served

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

Technical data

Specification for Drain Valve.

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

Drain Valve — technical specification
Product type	Glass drain 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	LSPVD series, e.g. LSPVD2 = DN 50
Face to face	125 mm to 300 mm
Drain outlet D	14 mm to 50 mm, size dependent

Dimension schematic of a borosilicate glass drain valve showing DN, DN1, d, L, H and outlet diameter D — Dimension references — letters match the table.

Drain Valve — dimensions

Cat. Ref.	DN	DN1	d	L	H	D
LSPVD07	15	15	12	125	90	14
LSPVD1	25	25	18	175	175	28
LSPVD1.5/1	40	25	18	225	175	28
LSPVD1.5	40	40	26	225	200	42
LSPVD2	50	50	38	300	220	50

All dimensions in mm, transcribed exactly from the catalogue page. D is the drain outlet diameter — allow clearance below the valve for a receiver.

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FAQ

Questions we are asked about this item.

DN, DN1, d, L and H are identical size for size. The drain valve adds the tapered drain leg and its outlet diameter D, so the low point empties completely.

Enough for the D outlet plus your receiver — D runs from 14 mm at DN 15 to 50 mm at DN 50. Send us the arrangement and we will check it against the drawing.