Potter PS10-EX is an explosion proof pressure actuated switch that detects a waterflow condition in automatic fire sprinkler systems in hazardous locations. Typical applications are wet pipe systems with alarm check valves, and dry pipe, preaction or deluge valves. It can also provide a low pressure supervisory signal, adjustable between 4 and 20 psi.
The switch has a cast aluminum enclosure rated IP66/NEMA 4, 9, a brass 1/2 in. NPT pressure connection and two independently adjustable switches that need no tools. Both switches are factory set to operate on pressure increase at 6 psi and on decrease at 5 psi. The cover uses a tamper resistant fastener that needs a special key, and one key is supplied.
Specifications
| Hazardous locations |
Class I Div 1 Groups B, C, D; Class II Div 1 Groups E, F, G; Class III Div 1; Ex db IIB T6 Gb |
| Contacts |
Two SPDT (Form C): 15.0 A at 125/250 VAC, 2.0 A at 30 VDC |
| Pressure range |
4 to 20 psi (0.27 to 1.3 bar) |
| Factory setting |
6 ±1 psi on increase, 5 ±1 psi on decrease |
| Maximum differential |
1 psi |
| Maximum system pressure |
300 psi |
| Pressure connection |
1/2 in. NPT male brass |
| Conduit |
1/2 in. NPT female |
| Enclosure |
Cast aluminum, IP66/NEMA 4, 9 |
| Temperature |
-40°F to 140°F (-40°C to 60°C) |
| Dimensions |
6 in. diameter x 7 in. high |
| Service use |
NFPA 13, 13D, 13R, 72 |
Installation notes
- Use Teflon tape on the threaded male connection; do not use pipe dope
- Mount the switch in the upright position
- Use an Ex component conduit sealing device to keep type "d" protection
- Adjust each switch independently by hand
Related models
- PS10-2 and PS10-1: standard pressure type waterflow switches
- PS10-2A-EX
- PS40-2: supervisory pressure switch
Documents
FAQ
Which hazardous locations is the PS10-EX rated for?
Class I Div 1 Groups B, C and D; Class II Div 1 Groups E, F and G; Class III Div 1; and CENELEC Ex db IIB T6 Gb.
What is the factory setting?
Both switches operate on pressure increase at 6 ±1 psi and on decrease at 5 ±1 psi. The adjustable range is 4 to 20 psi.
What are the contact ratings?
Two SPDT (Form C) sets rated 15.0 A at 125/250 VAC and 2.0 A at 30 VDC.
How is the conduit sealed?
The conduit entrance is 1/2 in. NPT female; use an Ex component conduit sealing device to maintain type "d" protection.
