1350402 Potter PS-40-EX Explosion Proof Pressure Switch

The PS40-EX is designed as a pressure type supervisory switch. The NFPA 72, National Fire Alarm Code, requires that a low pressure signal is sent at 10 psi below normal air pressure and 10 psi above normal pressure on dry pipe valves. Therefore, the PS40-2A switches are factory set for a pressure decrease at 30 psi and a pressure increase at 50 psi with a normal air pressure of 40 psi. The switches are adjustable at any point between 10 and 175 psi.

• CUL, UL and CSFM Listed, FM Approved and NYMEA Accepted
• Pressure Range - 10-175 PSI (0,7-12,1 BAR)
• Dimensions - 6"Dia. x 7"H (15,2cm Dia. x 17,8cm H)
• Enclosure - Cast aluminum
• Pressure Connection - 1/2" NPT male brass fitting
• Conduit Entrance - 1/2" NPT female conduit opening
• Factory Adjustment - One switch operates on decrease at 30 PSI (2,1 BAR) and one switch operates on increase at 50 PSI (3,5 BAR).
• Maximum Differential:
• Approx. 2 lbs. at 20 PSI (0,14@1,4 BAR)
• 5 lbs. at 175 PSI (0,35@12,1 BAR)
• Maximum System Pressure - 250 PSI (17,2 BAR)
• Switch Contacts:
• Two Sets of SPDT (Form C)
• 15.0 Amps at 125/250 VAC
• 2.0 Amps at 30 VDC
• Environmental Specifi cations - For use in hazardous locations classified as:
• Class I: Groups B, C, D, Div. 1
• Class II: Groups E, F, G, Div. 1
• Class III: Div. 1
• NEMA 4 and 9 Rated Enclosure
• Temperature range: - -40°F to 140°F (-40°C to 60°C)
• Service Use:
• Automatic Sprinkler NFPA-13
• National Fire Alarm Code NFPA-72

1350402 Specifications PDF