舉例 | 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). | UL | FM | CSA |
結構 | PG | | | | | General purpose enclosure, NEMA-1 (standard) | UL | FM | CSA |
復位操作 | PR | | | | | Manual reset, operates on pressure increase automatically, resets on decrease1 | UL | FM | CSA |
| PRL | | | | | Manual reset, operates on pressure decrease automatically, resets on increase1 | UL | FM | CSA |
封裝選項 | | W | | | | Weather-resistant enclosure, NEMA-2, 3R | | FM | CSA |
| | E | | | | Explosion-proof enclosure, NEMA-7, 9, Class I, Groups C & D; Class II, Groups E, F & G, includes drain, specify if for pressure, vacuum or differential pressure. | | | |
電路(開關)
選項
(For Electrical
Codes see Chart
Below) | | | | 2 | | SPST mercury switch, elect. code K†, opens on vacuum, pressure or differential pressure increase | UL | FM | CSA |
| | | | 2P | | SPST mercury switch, elect. code L†, opens on vacuum, pressure or differential pressure increase | UL | FM | CSA |
| | | | 3 | | SPST mercury switch, elect. code K†, closes on vacuum, pressure or differential pressure increase | UL | FM | CSA |
| | | | 3P | | SPST mercury switch, elect. code L†, closes on vacuum, pressure or differential pressure increase | UL | FM | CSA |
| | | | 153 | | SPDT mercury switch, elect. code M† | UL | FM | CSA |
| | | | 103 | | DPST, two SPST mercury switches, elect. code L†, both close on increase, FM approved, PG, PGW only | UL | FM | CSA |
| | | | 105 | | DPST, two SPST mercury switches, one elect. code L†, one elect. code N, both open on decrease | UL | FM | CSA |
| | | | 127 | | DPST, two SPST mercury switches, elect. code L†, both open on increase | UL | FM | CSA |
| | | | 129 | | DPST, two SPST mercury switches, one elect. code L†, one elect. code N, both open on increase | UL | FM | CSA |
| | | | 158 | | SPDT, two SPST mercury switches, one elect. code L† - opens on increase, one elect. code N - closes on increase | UL | FM | CSA |
| | | | 161 | | SPDT, two SPST mercury switches, one elect. code L† - opens on decrease, one elect. code N - closes on decrease | UL | FM | CSA |
| | | | 156 | | SPDT, two SPST mercury switches, elect. code L†, one- opens on increase, one closes on increase | UL | FM | CSA |
| | | | 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) | | | |
| | | | 153HS | | SPDT, Hermetically sealed snap switch, rated 5A at 125/250 VAC, 5A resistive at 30 VDC | UL | | |
| | | | 153HG | | SPDT, Hermetically sealed gold contact snap switch, rated 1A at 125 VAC, 1A resistive at 30 VDC | UL | | |
| | | 7200 | 804 | | DPDT, two SPDT snap acting switches, rated 5A at 120/240 VAC, 30 VDC resistive (1) | | | |
可調壓差范圍 | | | | | P1 | Adjustable range 1.0-30" w.c. (25-760 bar), maximum sustained pressure 2 psig* (0.14 bar) | UL | FM | CSA |
| | | | | P2 | Adjustable range 0.5-5 psig (.03-.35 bar), maximum sustained pressure 10 psig* (0.69 bar) | UL | FM | CSA |
