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Wika Miniature pressure switch PXA, flameproof enclosure Ex d, For the process industry.

Part Number : PXA

Brand :
WIKA

The PXA mechanical pressure switch is a high-quality device designed for safety-critical applications across various industries. Its compact stainless steel 316 enclosure is IP66 rated, making it suitable for harsh environments. The switch operates without external power, ensuring reliability and versatility with pressure ranges from 1 to 1,000 bar. With a set point repeatability of ? 1%, it features micro switches for direct electrical load switching and options for hermetically sealed contacts. The switch is also available with SIL-2 or SIL-3 capabilities for safety applications.

Please Refer to the Datasheet for more Information…

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Description

The PXA mechanical pressure switch is designed for use in safety-critical applications within various industrial sectors, including chemical and petrochemical industries, oil and gas, power generation (including nuclear power plants), water and wastewater management, and mining operations. This robust pressure switch is particularly effective for measuring gaseous and liquid media that may be aggressive, highly viscous, or contaminated. Its compact and slim design allows for installation in confined spaces, such as control panels. Manufactured from stainless steel 316, the switch enclosure provides excellent resistance to harsh environments, boasting an IP66 rating and NEMA 4X compliance for protection against dust and water ingress. The pressure switch accommodates a wide range of setting pressures, from 1 to 2.5 bar and up to 1,000 bar, ensuring versatility across applications. With a set point repeatability of ? 1%, the PXA offers reliable switching, even under fluctuating conditions. The mechanical design eliminates the need for external supply voltage during the switching process, enhancing reliability and reducing dependency on electrical systems. Each switch undergoes rigorous quality assurance and is 100% tested, ensuring that only high-quality products reach the market. The switch is equipped with micro switches capable of handling electrical loads of up to AC 250 V and 5 A directly, enhancing its usability across various applications. Users can select from multiple contact variants and electrical connections to best suit their needs. Hermetically sealed micro switches are available for corrosive environments, and DPDT (double pole, double throw) configurations allow for control of two separate circuits.

Key features:

Compact Design: Slim profile ideal for limited space installations. Durable Enclosure: Constructed from stainless steel 316, rated IP66 and NEMA 4X for robust protection against environmental factors. Wide Pressure Range: Adjustable from 1 to 2.5 bar up to 1,000 bar, accommodating various applications. High Set Point Repeatability: ? 1% for consistent and reliable performance. No External Power Needed: Mechanical operation ensures high reliability and independence from electrical supply. Versatile Electrical Connections: Options include hermetically sealed micro switches for corrosive environments and DPDT contacts for dual circuits. Belleville Spring Mechanism: Enhances stability and vibration resistance. Safety Compliance: Available with SIL-2 and SIL-3 ratings for critical applications.

Pros:

High Reliability: Mechanical design eliminates failure risks associated with electronic components. Versatile Applications: Suitable for a wide range of industries and media types. Compact Size: Ideal for installations where space is limited. Robust Construction: Resistant to harsh environments, ensuring long-lasting performance. Easy Installation: Multiple options for electrical connections and contact variants enhance adaptability.

Cons:

Maintenance Needs: Mechanical components may require more regular maintenance than electronic alternatives, especially in very harsh conditions. Limited Functionality: Primarily designed for pressure monitoring; may not offer additional features like digital readouts or advanced diagnostics found in electronic switches.

Downloads

Wika_PXA_Datasheet.pdf

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Wika_PXA_Operating_Instructions.pdf

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Wika_PXA_Technical_Information.pdf

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Specifications

Pressure Range:
1 bar to 1,000 bar
Operating Principle:
Mechanical (no external power required)
Electrical Load Capacity:
Voltage: AC 250 V, Current: 5 A
Switch Types:
SPDT, DPDT
Safety Compliance:
SIL-2 and SIL-3 options available for safety-critical applications
Connection Types:
Multiple options available for electrical connections
Installation:
Suitable for limited space environments (control panels, etc.)
Testing:
100% tested during production with quality assurance tracking.
Belleville Spring:
Included for increased stability and vibration resistance
Set Point Repeatability:
≤ 1%
Enclosure Material:
Stainless steel 316
Process connection size
Multiple Conncetion Sizes Available, for more info please refer to the Datasheet

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