MODEL - JD-2
Tubing: Recommended as minimum: 1/4” copper or
aluminum tubing or 1/8” pipe. All tubing and pipe must
be clean and free from oil, dirt, and chips. If piping run
is over five feet long, use larger size tubing or pipe, and
reduce size at switch connection.
Air Supply: The switch is equipped with two 1/8” NPT
connection ports. Connect air supply as shown below.
When used for vacuum or pressure applications, Model
JD-2 must always be vented as shown. No venting is
required for differential application.
Air Connections
Mounting
The Model JD-2 is always mounted with the stem up.
An optional mounting bracket can be fastened to the bottom
section of the switch housing with 5/16-18 x 1/2” bolt
(supplied with bracket).
7/8”
(22 mm)
Mounting Bracket
2-5/8”
(67 mm)
1-1/8”
(28 mm)
1/2”
(13 mm)
All Mounting Holes (Dia.)
7/32” 5/16” 7/32”
(5.5 mm) (8 mm) (5.5 mm)
1/2”
(13 mm)
Mounting
Bracket
Differential
Low Vacuum or
Low Pressure
High Vacuum or
High Pressure
Vacuum Only
Vacuum Connection
to top chamber
Vent Leave
Open
Pressure Only
Pressure Connection
to Bottom Chamber
Vent Leave
Open
Indicator Position Terminal Indicator Position Terminal
Off C and NO open
C and NC closed
ON C and NO closed
C and NC open
Terminal Connections
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