Available from GEM, a
wholly owned subsidiary of
Thermal Energy
International, GEM Oyster is
a piston type isolation/stop
valve that is described as
efficient, accurate and easyto-
maintain, providing shutoff
and zero emissions.

Suitable for general purpose fluid
use and in particular for steam and
condensate duty where shut-off
tightness is required, the device is
available in a variety of materials with
screwed, socket weld of
flanged connections.

Leaks over the seat or past
the stem can be sealed without
disassembling, removing the
valve from the line or even
isolating the process fluid. A
complete set of internal parts
can then be fitted quickly.