Series PG Gas Pressure/Differential Pressure Switch

External Adjustment, Visible Dial, Hermetically Sealed Snap or Mercury Switch

Large sensitive diaphragm and reliable, time proven mechanical design are combined in SERIES PG pressure/differential pressure switches. For use with air and other compatible gases, they feature excellent ±1% of full scale repeatability, clear easy-to-read scale and convenient external setpoint adjustment.

Application flexibility is assured by a large variety of switching options including SPST, SPDT, DPST and DPDT; opening or closing on increasing pressure, vacuum or differential. PR and PRL models add manual reset operation on increasing or decreasing pressure. Mercury switches or hermetically sealed snap switches are available where high humidity would be a problem. If vibration or other factors preclude the use of mercury, snap switches can be provided. Standard housing is NEMA 1. Optional enclosures can be supplied for weather resistant and explosion-proof requirements.

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Product Applications

  • Natural, manufactured or LP gas applications

Models & Ordering

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Model Description Usually Ships Price Order
PG-153-P1
Ships: Same Day
Price: $390.00
Gas pressure/differential pressure switch, range 1-30" water (.25-7.47 kPa), max. deadband 1.9" w.c. (0.47 kPa), SPDT mercury switch. Same Day $390.00 Order
PG-153-P2
Ships: Same Day
Price: $390.00
Gas pressure/differential pressure switch, range 0.5-5 psid (.03-.345 bar), max. deadband 0.4 psid (0.38 bar), SPDT mercury switch. Same Day $390.00 Order
PG-3-P1
Ships: Same Day
Price: $390.00
Gas pressure/differential pressure switch, range 1-30" water (.25-7.47 kPa), max. deadband 1.3" w.c. (0.32 kPa), SPST mercury switch, closes on increase. Same Day $390.00 Order
PG-3-P2
Ships: 1-2 Weeks
Price: $390.00
Gas pressure/differential pressure switch, range 0.5-5 psid (.03-.345 bar), max. deadband 0.3 psid (0.21 kPa), SPST mercury switch, closes on increase. 1-2 Weeks $390.00 Order
PG-7000-153-P1
Ships: 1-2 Weeks
Price: $372.00
Gas pressure/differential pressure switch, range 1-30" water (.25-7.47 kPa), max. deadband 4" w.c. (1.0 kPa), SPDT snap switch. 1-2 Weeks $372.00 Order
PG-7000-153-P2
Ships: 1-2 Weeks
Price: $372.00
Gas pressure/differential pressure switch, range 0.5-5 psid (.03-.345 bar), max. deadband .5 psid (.035 bar), SPDT snap switch. 1-2 Weeks $372.00 Order

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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:
See Ordering page.
Electrical Rating:
See Ordering page.
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 Ordering page.
Agency Approvals:
UL, CSA, FM for mercury switch models. UL only on snap switch models.

Features

  • Clear easy-to-read scale and external set point adjustment simplifies operation and trouble shooting
  • Large diaphragm provides accuracy for precise control
  • Multiple switching options meet the design of applications

Videos

Model Chart

 
EXAMPLE PG   153 P1   PG-153-P1 (Vacuum) (Pressure) (Differential Pressure) Control, fixed deadband, automatic reset, SPDT mercury switch, adjustable range 1.0-30" w.c. (25-760 bar).
MODEL PG         General purpose enclosure, NEMA-1 (standard)
PR         Manual reset, operates on pressure increase automatically, resets on decrease1
PRL         Manual reset, operates on pressure decrease automatically, resets on increase1
HOUSING
OPTIONS
  W       Weather-resistant enclosure, NEMA-2, 3R
CIRCUIT
(SWITCHING)
OPTIONS

(For Electrical
Codes see Chart
Below)
    2     SPST mercury switch, elect. code K†, opens on vacuum, pressure or differential pressure increase
    2P     SPST mercury switch, elect. code L†, opens on vacuum, pressure or differential pressure increase
    3     SPST mercury switch, elect. code K†, closes on vacuum, pressure or differential pressure increase
    3P     SPST mercury switch, elect. code L†, closes on vacuum, pressure or differential pressure increase
    153     SPDT mercury switch, elect. code M†
    103     DPST, two SPST mercury switches, elect. code L†, both close on increase, FM approved, PG, PGW only
    105     DPST, two SPST mercury switches, one elect. code L†, one elect. code N, both open on decrease
    119     (2) Mercury Switches, SPST NO (DPST)
    127     DPST, two SPST mercury switches, elect. code L†, both open on increase
    129     DPST, two SPST mercury switches, one elect. code L†, one elect. code N, both open on increase
    131     (2) Mercury Switches, SPST NC (DPST)
    152     (1) Mercury Switch, SPDT (4-wire)
    156     SPDT, two SPST mercury switches, elect. code L†, one- opens on increase, one closes on increase
    158     SPDT, two SPST mercury switches, one elect. code L† - opens on increase, one elect. code N - closes on increase
    161     SPDT, two SPST mercury switches, one elect. code L† - opens on decrease, one elect. code N - closes on decrease
    190     (2) Mercury Switches, SPST NC; SPST NO (SPDT)
    804     DPDT, two SPDT mercury switches, elect. code M†
    (__)     Other circuits available, consult factory
    7000-153     SPDT, snap acting switch, rated 15A at 120 VAC, 8A at 240 VAC, 0.5A at 120 VDC, .25A at 240 VDC (1)
    7000-153HS     SPDT, Hermetically sealed snap switch, rated 5A at 125/250 VAC, 5A resistive at 30 VDC
    7000-153HG     SPDT, Hermetically sealed gold contact snap switch, rated 1A at 125 VAC, 1A resistive at 30 VDC
    7200-804     DPDT, two SPDT snap acting switches, rated 5A at 120/240 VAC, 30 VDC resistive (1)
ADJUSTABLE DIFFERENTIAL
PRESSURE RANGES WITH MAXIMUM
SUSTAINED PRESSURES
      P1   Adjustable range 1.0-30" w.c. (25-760 bar), maximum sustained pressure 2 psig* (0.14 bar)
      P2   Adjustable range 0.5-5 psig (.03-.35 bar), maximum sustained pressure 10 psig* (0.69 bar)
      P3   Adjustable range 2.5-76.3cm w.c.
OPTIONS         ATR Aluminum Tag (Riveted)
        ATW Aluminum Tag (Wired)
        PE Prep for EP
        PRESET Preset and Pressure Check Set Point
        PT Paper Tag
        STR Stainless Steel Tag (Riveted)
        STW Stainless Steel Tag (Wired)
        23720 Fungus Proofing Special 23720
        23444 O2 Acetylene Special 23444
        RCH Rigid Conduit Hub
* Maximum sustained pressure 15 psig (1.0), maximum surge limit 20 psig (1.4), both ranges when used as single pressure switch with low pressure port vented to atmosphere.
1  7000-153 and 7200-804 not available with PR or PRL manual reset.
 † See Electrical Rating Chart Below.
ELECTRICAL RATINGS - Mercury Switch
CODE
RATING AC or DC
K
6A at 120 V, 3A at 240 V
L
10A at 120 V, 5 A at 240 V
M
4A at 120 V, 2A at 240 V
N
1A at 120 V, 0.5A at 240 V

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