Neodyn 181P NEMA 4X, 7, 9 and 13 Vacuum Switch

Neodyn 181P NEMA 4X, 7, 9 and 13 Vacuum Switch is a compact, adjustable instrument engineered specifically for hazardous industrial environments. Built to perform in rigorous conditions, this switch utilizes the efficient Nega-Rate® Belleville disc spring mechanism, which provides superior set point stability and exceptional resistance to vibration.

Description

Neodyn 181P NEMA 4X, 7, 9 and 13 Vacuum Switch offers a premium solution for process control in hazardous areas. Unlike standard switches, the 181P is designed to withstand the challenges of explosive gases, dusts, and corrosive elements, ensuring operational continuity and safety.

Superior Stability with Nega-Rate® Technology At the core of the 181P is the Nega-Rate® Belleville disc spring. This proprietary technology eliminates the drift often associated with traditional sensing elements, delivering a snap-action response that remains stable over time, even in high-vibration environments. This ensures that your vacuum systems operate within their critical parameters without frequent recalibration.

Adjustable and versatile This model is designed for flexibility. It features an internal, slotted adjustment wheel, allowing technicians to fine-tune the set point to the exact needs of the application. Furthermore, the unit includes a selectable deadband feature, which can be preset, providing engineers with greater control over the switch’s reset point and reducing rapid cycling in fluctuating vacuum conditions.

Hazardous Location Certified Safety is non-negotiable. The 181P features a snap-action electrical switch assembly that is fully listed by Underwriters Laboratories, Inc., FM Approval, and CSA International. Its enclosure meets NEMA 4X, 7, 9, and 13 standards, providing protection against corrosion, explosive gases, combustible dusts, and moisture.

Brand

Neodyn

Neodyn

ITT Neo-Dyn® is a leading manufacturer of high quality and reliable industrial switches. Our compact adjustable switches, pressure switches, hazardous area switches, vacuum switches, and temperature switches support a variety of applications throughout the world. Our legacy of competitively priced products and on time delivery, guarantee that you have the proven performance in the product that you need to support your specific requirements when you need it most. With a strong focus in the aerospace, general industrial, energy and chemical markets, we are your first choice for all of your switch product needs.

Specifications

  • Electrical Listings: Snap action electrical switch assembly listed by Underwriters Laboratories, Inc., FM Approval and CSA International
  • Electrical Connection: 1/2 NPT male conduit connection with PVS insulated 18 AWG, 18″ long leads
  • Pressure Connection: 1/4 NPT Female and 1/2 NPT Male
  • Temperature Range:*
    • Ambient: -40°F to +176°F (-40°C to +80°C)
    • Media: -40°F to +300°F (-40°C to +149°C)
  • Adjustment: Internal, slotted adjustment wheel
  • Shipping Weight: Approximately 20 ounces

* Temperature limits change with O-Ring selection. See Electrical Assembly specification sheet for Temperature Class Ratings.

Features

  • Vibration Resistance: Nega-Rate® Belleville disc spring ensures superior set point stability.
  • Hazardous Area Ratings: Designed to meet NEMA 4X, 7, 9, and 13 standards for dangerous environments.
  • Selectable Deadband: Feature allows the deadband to be preset for optimized control.
  • Internal Adjustment: Settings are managed via an internal, slotted adjustment wheel for security.
  • Certified Safety: Electrical assembly listed by UL, FM, and CSA International.
  • Dual Pressure Connections: Equipped with both 1/4 NPT Female and 1/2 NPT Male connections.

Applications

Neodyn 181P NEMA 4X, 7, 9 and 13 Vacuum Switch is engineered for sectors where equipment is exposed to hazardous materials:

  • Petrochemical Refineries: Monitoring vacuum distillation columns in explosive atmospheres.
  • Chemical Processing: Controlling vacuum pumps in corrosive environments requiring NEMA 4X protection.
  • Offshore Platforms: Reliable operation in harsh marine conditions with potential gas exposure.
  • Pharmaceutical Manufacturing: Ensuring precise vacuum levels in dust-laden processing areas (NEMA 9).
  • Power Generation: Vacuum monitoring in turbine systems where vibration is a factor.