Identifying Valves Used in Sigma Products (SB1001.01)

SIGMA SYSTEMS CORPORATION
Technical Bulletin #SB1003.00
Valve Disassembly and Assembly
3163 Adams Ave
San Diego, CA 92116
619.283.3193
This bulletin covers how to disassemble and
assemble valves used in Sigma chambers and
platforms (plates). The pictures to the right
show an exploded view of a valve and two
samples of typical mounting of valves on the
back of a chambers.
Note: This bulletin shows valves mounted only
in temperature chambers, as thermal platforms
are more compact and harder to photograph.
The procedure for valves is the same whether
they are in a chamber or a platform.
Exploded view of typical valve
Image 2-1
Before beginning with the disassembly of a
valve make sure:
A) That coolant source is turned off and that
the valve has been disconnected from the
coolant source.
B) That electrical power is removed from the
chamber or platform
C) That electrical power is removed from the
controller.
Failure to follow these simple instructions can
result in serious injury and death.
Typical valve assembly on back of chamber with
primary L–N 2
valve on right and a redundant or
safety valve on left
Image 2-2
Extremely
thin walls
During disassembly and assembly of the valve
be careful not to damage or distort the plunger
guide. Its precision walls are very thin and can
easily be damaged.
SB1001.01-24
Typical single valve assembly on back of chamber.
Image 2-3