Component Description
06-236115-001
3-27
October 2014
3-3.7.5
Pressure Operated Switches, P/N 81-486536-000 and P/N 81-981332-000
Pressure Switches operate from system pressure upon discharge to energize or de-energize
electrically operated equipment. Pressure switches may be used to shut down machinery and
ventilation or to annunciate system discharge (see Figure 3-30 and Figure 3-31).
Figure 3-30. Pressure Operated Switch
Figure 3-31. Pressure Operated Switch, Explosion Proof
GASKET
FRONT VIEW
SWITCH 3PDT
COVER
BOX - 3 - ½ in. CONDUIT KNOCKOUTS
EACH SIDE
½ in. NPT FEMALE - CONNECT TO SYSTEM PIPING
SIDE SECTION
SET
OPERATED
PRESSURE OPERATED SWITCH
3P.D.T.
UL
FM
TO RESET PUSH
STEM TO SET
POSITION
15 AMP 125 VAC
10 AMP 250 VAC
3/4 HP 1-2-3 PH 125-480 VAC
8 COVER SCREWS
STEM SHOWN IN SET POSITION-
PULL UP ON STEM TO MANUALLY
OPERATE SWITCH
0.375 in. (9.52 mm)
½ in. SUPPLY PIPE WITH UNION
OPERATED
SET
4.00 in.
(101.6 mm)
WIRING
SCREW
TERMINALS
4.00 in.
(101.6 mm)
FRONT VIEW
COVER REMOVED
OPERATING PRESSURE = 50 PSI MIN
PRESSURE TESTED 1000 PSI
STEM IN
OPERATED
POSITION
STEM IN SET
POSITION - PULL
UP ON STEM TO
MANUALLY
1 in. NPT FEMALE BOTH ENDS
FOR ELECTRIC CONNECTION
SWITCH SUPPLIED WITH
2 - 1 in. NPT PIPE PLUGS
CLUTCH
3 POLE
SINGLE
THROW
TOGGLE
SWITCH
TO RESET PUSH
STEM TO SET
POSITION
OPERATING HEAD
PRESSURE INLET -
½ in. NPT FEMALE
EXPLOSION PROOF
MACHINED JOINT.
DO NOT USE GASKET
OR MAR SURFACES.
SET
POSITION
GAS
INLET
6 - COVER
SCREWS
30 AMP 250 VAC
20 AMP 600 VAC
2 HP 100-600 V
3 PHASE AC
PRESSURE
OPERATED
EXPLOSION
PROOF
SWITCH
UNION CONNECTION
2 - 13/32 in.
MOUNTING HOLES
6.31 in.
(160.27 mm)
9.00 in.
(228.6 mm)
4.37 in.
(111 mm)
4.18 in.
(106.17 mm)
3.50 in.
(88.9 mm)
3 POLE
Содержание ECS
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