Dwyer Series PG Gas Pressure/ Differential Pressure
Switches
|
| External Adjustment, Visible Dial, Hermetically
Sealed Snap or Mercury Switch |
 Large
diaphragm sensitivity and time proven dependable design are
combined in model PG differential pressure switches. Visible
dial reduces "start up" time and helps prevent calibration
errors. External adjustment allows set point change without
removal of cover. Unit is listed by UL, FM and CSA.
¹ SPST switches shown in chart closes on increase of
pressure. For opens on increase of pressure, replace "3"
with "2". Example: PG-2-P1. Models are stock and
the same price.
See
Dimensions
|
| SPECIFICATIONS |
Wetted Materials: Fairprene, brass, steel, and
aluminum.
Temperature Limits: -10 to 180°F (-23 to 82°C).
Pressure Limit:
Single Pressure Use on High Side:
Sustained Pressure: 15 psig (1.0 bar).
Surge Limit: 20 psig (1.4 bar).
Differential Pressure Use:
Sustained Pressure, Range P1: 2 psig (.14 bar).
Sustained Pressure, Range P2: 10 psig (0.7 bar).
Enclosure Rating: General purpose. Weatherproof and explosion-proof
optional.
Repeatability: ±1% of full range.
Switch Type: SPST mercury switch, SPDT mercury switch, or SPDT
hermetically sealed snap switch.
Electrical Rating: SPDT Mercury: 4A @ 120 VAC/VDC, 2A @ 240
VAC/VDC. SPST Mercury: 6A @ 120 VAC/VDC, 3A @ 240 VAC/VDC. SPDT
Snap: 15A @ 120 VAC, 8A @ 240 VAC, 0.5A @ 120 VDC, 0.25A @ 240
VDC. SPDT H.S. Silver Snap: 5A @ 125/250 VAC, 30 VDC resistive.
SPDT H.S. Gold Snap: 1A @ 125 VAC, 30 VDC resistive.
Electrical Connections: Screw type.
Conduit Connection: 7/8" (22.23 mm) hole for 1/2"
(12.7 mm) conduit hub.
Process Connection: 1/2" male NPT and 1/8" female
NPT used for single positive pressure or high differential pressure,
1/8" female NPT used for single vacuum or low differential
pressure.
Mounting Orientation: Vertical.
Set Point Adjustment: External screw.
Weight: 4.5 lb (2 kg).
Deadband: See model chart.
Agency Approvals: UL, CSA, FM for mercury switch models. UL
only on snap switch models. |
| Popular Models: |
| Model Number |
Range |
Max.
Deadband |
Switch
Type |
| PG-153-P1 |
1-30"
water (.25-7.47 kPa) |
1.9"
w.c. (0.47 kPa) |
SPDT
Mercury |
| PG-153-P2 |
0.5-5
psid (.03-3.45 bar) |
0.4"
psid (0.38 bar) |
SPDT
Mercury |
| PG-3-P1 |
1-30"
water (.25-7.47 kPa) |
1.3"
w.c. (0.32 kPa) |
SPST
Mercury¹ |
| PG-3-P2 |
0.5-5
psid (.03-3.45 bar) |
0.3
psid (0.21 kPa) |
SPST
Mercury¹ |
| PG-7000-153-P1 |
1-30"
psid (.03-3.45 bar) |
4"
wc (1.0 kPa) |
SPDT
Snap |
| PG-7000-153-P2 |
0.5-5
psid (.03-3.45 bar) |
.5
psid (.035 bar) |
SPDT
Snap |
|
| Popular Models with Weather-Proof Housing: |
| Model Number |
Range |
Max.
Deadband |
Switch
Type |
| PGW-153-P1 |
1-30"
water (.25-7.47 kPa) |
1.9"
w.c. (0.47 kPa) |
SPDT
Mercury |
| PGW-153-P2 |
0.5-5
psid (.03-3.45 bar) |
0.4
psid (0.38 bar) |
SPDT
Mercury |
| PGW-3-P1 |
1-30"
water (.25-7.47 kPa) |
1.3"
w.c. (0.32 kPa) |
SPST
Mercury |
| PGW-3-P2 |
0.5-5
psid (.03-3.45 bar) |
0.3
psid (0.21 kPa) |
SPST
Mercury |
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