Instructions
TECHNICAL NOTE
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BRAND oers a selection of thread adapters for common
thread sizes in the laboratory. For bottle adapters with a bottle
thread diameter less than 32 mm, the bottle adapter GL 32 – 33
(Item No. 704396) must be inserted. One possible combination
would be Dispensette® S (valve block adapter GL45) on bottle
adapter GL 32 – 33 (Item No. 704396) on bottle adapter
GL 28/ S 28 (Item No. 704328) on a media bottle with GL 28
thread.
If there is no suitable adapter for a screw-top bottle or canister, you can use the following solution:
The bottleneck (canister opening) must have a diameter of
at least 40 mm. A hole with a diameter of 32 mm is drilled
into the original screw cover of the container. The adapter
GL 28 / S 28 (704328) is inserted into the hole from the bot-
tom. Adapter GL 32 – 33 (704396) is screwed onto the adapter
GL 28 / S 28. The distance between the knurls of the adapters,
which results from the thickness and shape of the original
cover, must not exceed 10 mm to ensure a secure interlock-
ing of the threads. Depending on the application, the con-
tact surfaces should still be sealed with a suitable material.
Screw the Dispensette®, seripettor® or Titrette® onto adapter
GL 32 – 33, ensuring that it fits securely.
Sealing ring
It is important to know that there is always a certain gap along
the thread turns of thread connections. This is necessary
for minimizing the friction produced when the threads are
screwed together and for balancing tolerances. The sealing
ring is used to seal the valve block of a Dispensette® or Titrette®
against the upper edge of the bottleneck. Depending on the
bottle, the upper edge of the bottleneck would otherwise have
Le: Dispensette® without sealing ring; right: Dispensette® with sealing ring
(shown here in red for illustration purposes)
Thread connections: gap between threads shown in red
no contact with the valve block of the Dispensette® or Titrette®.
This is useful, for example, when a drying tube is being used,
since moisture can penetrate into the bottle along the thread
turns. The sealing ring also provides additional security. For
example, when media is being transported, it can splash onto
the junction between the bottleneck and the valve block
adapter.
You can find our adapter templates
at
shop.brand.de