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 — Select 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.)
  ¹⁄₂ 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
  ¹⁄₄ NPT Female and                                C    11 amp, ¹⁄₄ hp at 125 or 250 VAC; 5 amp resistive, 3 amp inductive at 28 VDC;
  ¹⁄₂ NPT Male                                           .5 amp resistive at 125 VDC
                                                    CC   11 amp, ¹⁄₄ 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    ⁷⁄₁₆" - 20 SAE Female Port
                                                    G    ¹⁄₂ NPT Female Port
  Adjustment                                        I    ³⁄₄ 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     ¹⁄₄ 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