1340403 Potter PS40-1 SPDT Low/High Supervisory Pressure Switch for Dry Valves

Features

• One or two switch models available
• Independent switch adjustment on two switch models, no tools needed
• Two 1/2” conduit/cable entrances
• Separate isolated wiring chambers
• Non-corrosive pressure connection
• VdS version available
• Non-Conductive enclosure

Installation

The Potter PS40 Series Supervisory Pressure Actuated Switches are designed primarily to detect an increase and/or decrease from normal system pressure in automatic fire sprinkler systems. Typical applications are: air/nitrogen supervision in dry pipe and pre-action systems, pressure tanks, air supplies, and water supplies. The PS40-1 has one switch and is factory set to activate at approximately 30 psi (2,1 bar) on a decrease in pressure. The PS40-2 has two switches. The Low switch is factory set to activate at approximately 30 psi (2,1 bar) on a decrease in pressure. The High switch is factory set to activate at approximately 50 psi (3,5 bar) on an increase in pressure. NFPA 72 requires a supervisory signal if the pressure increases or decreases by 10 psi from normal. The PS40 is factory set for a normal air pressure of 40 psi. See section heading Adjustments and Testing if other than factory set point is required.

Technical Specifications

• Conduit Entrances - Two knockouts for 1/2” conduit provided. Individual switch compartments and ground screw suitable for dissimilar voltages
• Contact Ratings - SPDT (Form C), 10.1 Amps at 125/250VAC, 2.0 Amps at 30VDC, One SPDT in PS40-1, Two SPDT in PS40-2
• Cover Tamper - Cover incorporates tamper resistant fastener that requires a special key for removal. One key is supplied with each device
• Differential - Typical 1 lb. at 10 psi (,07 at ,7 bar), 4 lbs at 60 psi (,28 at 4,1 bar)
• Dimensions - 3.78”(9,6cm)Wx3.20”(8,1cm)Dx4.22”(10,7cm)H
• Enclosure - Cover: Weather/UV/Flame Resistant High Impact Composite, Base: Die Cast All parts have corrosion resistant finishes
• Environmental Limitations - -40º F to 140ºF (-40ºC to 60ºC), NEMA 4/IP66 Rated Enclosure indoor or outdoor when used with, NEMA 4 conduit fittings
• Factory Adjustment - PS40-1 operates on decrease at 30 psi (2,1 bar), PS40-2 operates on increase at 50 psi (3,5 bar) and on decrease at, 30 psi (2,1 bar)
• Maximum System Pressure - 300 psi (20,68 bar)
• Pressure Connection - Nylon 1/2” NPT male
• Pressure Range - 10-60 psi (,7-4,1 bar)
• Service Use - NFPA 13, 13D, 13R, 72

1340403 Specifications PDF