Overview

This document provides technical specifications, ordering instructions, and options for Riels Instruments' explosion-proof pressure switches (model series RIBW). These devices comply with EN IEC 60529 (IP66) and Eex-d IICT6 standards, featuring cast aluminum enclosures with oven-baked powder coating in hammertone grey.

1. Product Specifications

• Repeatability: Typically 0.2% of full scale.
• Pressure Ranges and Units: Standard units in Barg; optional units include PSI, Kg/cm², and Pa.
• Process Connection: Standard 1/4" NPT (female) or BSP (female).
• Diaphragm and O-ring Materials: Standard Buna N; other wetted parts available on request.
• Enclosure Material: Cast aluminum with powder coating; also available in stainless steel (SS 316).
• Explosion Protection: Certified explosion-proof (Eex-d IICT6), suitable for hazardous environments.

2. Pressure Range Codes and Adjustable Ranges

The document lists multiple pressure range codes with corresponding adjustable ranges in various units (mBar/Bar, PSI/InchWC, KPa/MPa, Kg/cm²/mmH2O). Examples include:

• Low ranges: 2 - 15 mBar up to 10 - 300 Bar.
• Equivalent ranges in PSI: 1.5 - 5.8 PSI up to 150 - 5100 PSI.
• Ranges in KPa and Kg/cm² also provided for precise selection.

Note: Some ranges are only available with specific microswitch elements (L1 standard; K1 on request).

3. Ordering Instructions and Model Code Construction

To build a model code, follow these steps:

1. Select Range Code: Refer to the pressure range codes on the front page.
2. Select Process Connection: Options include 1/4" or 1/2" NPT (female or male), BSP connections, and materials such as aluminum, SS316, Monel, PVC, Hastelloy, Titanium.
3. Select Enclosure Type: Aluminum or SS316 with conduit options (e.g., 3/4" NPT female, M20x1.5).
4. Select Wetted Parts: Diaphragm and O-ring materials include Buna N, Viton, SS316, Neoprene, Teflon, or welded configurations.
5. Select Microswitch Type: Various microswitches with different voltage and current ratings for AC and DC applications, including environmental protection (IP67) options.
6. Select Additional Options: Cable gland, stainless steel tag, vacuum protection plate, etc.

4. Microswitch Ratings and Types

• AC ratings up to 480 VAC / 15A.
• DC ratings vary; some are standard, others are not UL listed but tested.
• Switch types include SPDT and DPDT configurations.
• Certifications include VDE according to DIN EN 61058-1.

5. Accessories and Mounting

• Pipe mount bracket set (2" size) includes brackets, bolts, and nuts for mounting pressure and temperature switches.
• Bracket use does not eliminate effects of vibrations on instrument performance.
• Special options for H2S environments and EEx(i) applications are available.

6. Limitations and Disclaimers

• Wetted parts are not guaranteed against corrosion or permeation due to varying process conditions.
• Process temperature limits for diaphragm/O-ring materials are generally -5°C to +90°C.
• Riels Instruments disclaims liability for errors or misinterpretations in the document.
• Users should rely on empirical experience and consult representatives for specific applications.

Summary

This technical sheet serves as a comprehensive guide for selecting and ordering explosion-proof pressure switches from Riels Instruments. It details product features, pressure ranges, material options, electrical switch ratings, and accessories, while emphasizing compliance with safety standards and environmental suitability. Users are advised to consider process conditions carefully and consult with Riels representatives for customized solutions.