Brochure

22-18
© 2019 Schneider Electric
All Rights Reserved
Pressure Switches Machine Tool, Type G
schneider-electric.us
Class 9012 / Refer to Catalog 9012CT9701
22
PRESSURE, VACUUM, AND FLOAT
SWITCHES
Differential/Dual Stage, Type G
Differential-Pressure Operation
9012GGW1
Pressure switches for differential-pressure operation monitor the change in the
difference between two pressures. Type G differential-pressure switches are used in
applications to signal that a predetermined pressure difference has been reached as a
result of a widening or increasing difference between the two pressures. They can also
signal that a predetermined pressure difference has been reached as a result of a
narrowing or decreasing difference between the two pressures.
Table 22.53: Differential-Pressure Switches
NEMA 4, 4X, 13 Enclosures
UL Listed and CSA Certified As Industrial Control Equipment
[7]
Working Pressure
Range on
Decreasing X
(upper) Actuator
Adjustable Difference
on Decreasing
Pressure
(adds to working
pressure)
Y (lower) Actuator
Adjustable Differential
Actuates on
Increasing
Pressure
(adds to adjustable
difference)
Maximum
Allowable
Pressure
psi
Single
Pole
Double
Throw
Double
Pole
Double
Throw
Cat. No. Cat. No.
Diaphragm Actuated—Nitrile (Buna-N) Diaphragm, Zinc Plated Steel Housing
0–75 0.25–10 0.8–2 100 GGW1 GGW21
0–175 0.5–36 5–15 240 GGW4 GGW24
0–500 3–175 22–90 850 GHW1 GHW21
Piston Actuated—#440 Stainless Steel Piston. #303 Stainless Steel Housing, Viton
®
Fluorocarbon
Diaphragm and O-ring, Teflon
®
Retaining Ring
0–5000 15–825 80–200 7500 GJW1 GJW21
Dual-Stage Operation
Type G dual stage pressure switches are designed for use in applications where two
separate pressure operations must be controlled by a single pressure monitoring device.
These controls are most commonly used where dual functions are required or in
sequencing applications such as alarm, followed by shutdown.
Table 22.54: Dual-Stage Pressure Switch
NEMA 4, 4X, 13 Enclosure
UL Listed and CSA Certified As Industrial Control Equipment
[8]
Range Setting Limits of
Pressure Between Which
Stage 1 Can Be Adjusted to
Operate on Decreasing Pressure
Add Adjustable Spread to Range
Setting to Obtain
Decreasing Operating Point
of Stage 2
Fixed Differential—Add to Low
(Decreasing) Operating Point to Obtain
Approximate High
(Rising) Operating Point of Each Stage
Maximum
Allowable
Pressure
psi
SPDT
Each
Stage
Stage 1 Stage 2 Catalog No.
Diaphragm Actuated—Nitrile (Buna-N) Diaphragm, Zinc Plated Steel Housing
9012GKW1
.2–10 1–5 1.0 ±0.2 1.5 ±0.4 100 9012GKW1
1–40 4–20 4.0 ±1.0 6.0 ±1.5 100 9012GKW2
1.5–75 6–30 5.0 ±1.5 8.0 ±2.0 240 9012GKW4
3–150 12–75 8.0 ±2.0 12 ±3 475 9012GKW5
5–250 22–110 14 ±3 21 ±5 750 9012GKW6
13–425 40–180 20 ±4 30 ±7.5 850 9012GLW1
20–675 45–250 30 ±6 45 ±11 2000 9012GLW2
Piston Actuated—#400 Stainless Steel Piston. #300 Stainless Steel Housing, Viton
®
Fluorocarbon Diaphragm and O-ring, Teflon
®
Retaining Ring
20–1000 50–300 50 ±10 75 ±19 10000 9012GMW1
90–2900 140–800 140 ±30 210 ±52 15000 9012GMW2
170–5600 300–1700 275 ±60 400 ±100 20000 9012GMW3
270–9000 500–2500 400 ±80 800 ±150 25000 9012GMW4
Ordering Dual-Stage Pressure Switches
1. Specify Class 9012 Type..., and indicate the high or low operating point for each stage within the limits shown in the above table.
Example:
Class 9012 Type GKW4
Set: Stage 1 at 30 psi decreasing pressure
Stage 2 at 50 psi decreasing pressure
(20 psi spread)
Differential of each stage will be approximately as shown in the table above.
2.
For available modifications see page 22-21. If one or more of these modifications are desired, add the appropriate Form to the Class and Type. Arrange form letters in alphabetical order
when ordering more than one modification.
Acceptable Wire Sizes 12-22 AWG
Recommended Terminal Clamp Torque 7 lb-in
Electrical Rating page 22-19
Temperature Rating page 22-19
Modifications page 22-21
Accessories page 22-21
Renewal Parts Kits page 22-34
Dimensions page 22-20
File E12158 CCN NKPZ
File LR25490 Class 3211-03
File E12158 CCN NTHT - Marine Use
[7] UL Marine Listed for use on vessels greater than 65 feet long where ignition protection is not required.
[8] UL Marine Listed for use on vessels greater than 65 feet long where ignition protection is not required.