Neo-Dyn® Series 131P Pressure Switch/Internal Adjustment
DEscriptION
Compact, adjustable pressure switch for pneumatic or low
impulse hydraulic process applications. Using our efficient
Nega-Rate® Belleville disc spring, we offer superior set point
stability and vibration resistance. The 131P series pressure
switch also has a selectable deadband feature which can be
Weather Proof preset to fit most any application.
(NEMA 4X and 13)
Operating Pressure Data
Adjustable Adjustable Set Point Range Selectable Default Maximum Recommended Proof
Range
Number Increasing Decreasing Deadband Deadband (approx.) System Pressure Pressure
2 * 1 to 24 1.5 to 2 1.9 1000 2000
3 * 17 to 42 3 to 6 4.5 1000 2000
4 * 1 to 50 6 to 11 8 1000 2000
5 * 45 to 100 7 to 11 8 1000 2000
6 * 90 to 150 7 to 17 12 1000 2000
7 * 140 to 200 11 to 21 16 1000 2000
All values given in psig unless otherwise noted.
* Add selected deadband to decreasing pressure range.
Standard Specifications Ordering Sequence — selec desired option for each category
Electrical Listings OPTIONS
Snap action electrical switch Wetted Material
recognized by Underwriters’ 1 Aluminum port, polyimide diaphragm, Buna-N O-Ring
Laboratories, Inc. and CSA 4 316 stainless steel port, polyimide diaphragm, Buna-N O-Ring
International
Adjustable Range
Electrical Connection 2 1 psig dec. to 26 psig inc. (.069 bar dec. to 1.79 bar inc.)
3 17 psig dec. to 46 psig inc. (1.17 bar dec. to 3.17 bar inc.)
¹⁄?? NPT male conduit connection 4 1 psig dec. to 58 psig inc. (.069 bar dec. to 4.00 bar inc.)
with PVC insulated 18 AWG, 18" 5 45 psig dec. to 108 psig inc. (3.10 bar dec. to 7.44 bar inc.)
long leads 6 90 psig dec. to 162 psig inc. (6.21 bar dec. to 11.1 bar inc.)
7 140 psig dec. to 216 psig inc. (9.65 bar dec. to 14.9 bar inc.)
Pressure Connection
Electrical Form
¹⁄?? NPT Female and C 11 amp, ¹⁄?? hp at 125 or 250 VAC; 5 amp resistive, 3 amp inductive at 28 VDC;
¹⁄?? NPT Male .5 amp resistive at 125 VDC
CC 11 amp, ¹⁄?? hp at 125 or 250 VAC; 5 amp resistive, 3 amp inductive at 28 VDC;
Temperature Range* .5 amp resistive at 125 VDC
Ambient: -40°F to +180°F
Enclosure
(-40°C to +82°C) 3 Meets or exceeds the requirements of NEMA Type 3, 3R, 3S, 4, 4X and 13
Media: -40°F to +300°F
Miscellaneous
(-40°C to +149°C) A Epoxy paint exterior — extra protection for severe environments
B Viton O-Ring
* Temperature limits change with
C EPR O-Ring
O-Ring selection E ??⁄????" - 20 SAE Female Port
G ¹⁄?? NPT Female Port
Adjustment I ³⁄?? NPT Conduit box with terminal strip
Internal, slotted adjustment wheel J Annealed stainless steel port screws for H2S environments — Consult factory
for reduced system and proof pressure ratings (Not available with X option)
Shipping Weight M Gold electrical contacts for extremely low current applications
Approximately 20 ounces R 72" Electrical free leads
S Stainless steel diaphragm
V ¹⁄?? NPT male port
X UL and CSA Approval and CE Mark
Z Mounting bracket kit
Special (Consult representative or factory)
Non-catalog adjustable range and/or set point, deadband and proof pressure
Ordering Procedure Example
When factory presetting is desired, Series
stipulate set point, increasing or Wetted Material
decreasing Adjustable Range
Insert available option number or Electrical Form (specify)
letter designation as required Enclosure
Miscellaneous
When a selectable DB is desired,
stipulate DB within allowed range
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