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.

Product Applications

Natural, manufactured or LP gas applications

More Information

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

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

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Series PG Gas Pressure/Differential Pressure Switch

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