Source container FQG61

Summary

Product Identification

• Product Name: Source container FQG61, FQG62
• Application: Used for radiometric point level measurement, continuous level measurement, and density measurement.
• Function: Screens radioactive sources, emitting radiation primarily in one direction.
• Models: FQG61 and FQG62 differ in size and screening effect.

Key Features and Benefits

• Lightweight design with near-spherical shape for effective screening.
• Facilitates safe and easy replacement of the radioactive source.
• Achieves highest safety classification for supplied sources (DIN 25426/ISO 2919, typical classification C66646).
• Compact and easy to mount.
• Offers various angles of emission for application adaptability.
• Manual or pneumatic switch-ON/switch-OFF functionality.
• Securing options for switch position: padlock, cylinder lock, or locking bolt.
• Clearly indicates switch state.
• Available in a fire-resistant version: +821 °C (+1510 °F) for 30 minutes.

Function and System Design

Switching Radiation ON/OFF

• Radiation is switched ON/OFF by rotating the insert 180°.
• Switch position is externally visible.
• OFF position can be secured by a cylinder lock or padlock.
• ON position can be secured by a cylinder lock, padlock, or locking bolt.

Remote Control and Indication

• Versions with a pneumatic drive (order code 020, options K, L, M, N) allow remote switching.
• These versions include proximity switches for remote indication of the switch state.

Fire-Resistant Version

• Features a welded compensation compartment to collect liquefied lead in case of fire, enhancing fire resistance.

Technical Data

Attenuation Factor and Half-Value Layers

Note: Values are typical and do not account for production variations or measurement device tolerances.

Maximum Activity of Radiation Source

Note: Maximum admissible activity may be further restricted by country-specific approvals.

Dose Rate Diagrams

• Provide local dose rates at a specified distance from the container surface.
• Examples are shown for 1 m (3.3 ft) distance with selected activities of ⁶⁰Co or ¹³⁷Cs.
• Diagrams typically apply to the OFF switch position and order code 020, option A.
• Maximum values are outside the beam path.
• Dose rate diagrams for specific configurations can be ordered with order code 580.

Mechanical Construction

Version (Order Code 020)

• A: Manual switch-ON/OFF, cylinder lock, cover.
• B: Manual switch-ON/OFF, swivel bracket, locking bolt (ON), padlock (OFF).
• C: Manual switch-ON/OFF, swivel bracket, padlock (ON/OFF).
• D: Manual switch-ON/OFF, swivel bracket, padlock (ON/OFF), enhanced dust/humidity protection.
• K, L, M, N: Pneumatic switch-ON/OFF, padlock (OFF), with options for enhanced dust/humidity protection (M, N).

Dimensions

• Detailed dimensions (A, B, C, D, E) are provided for various versions and models (FQG61/FQG62).
• FQG61 Dimensions:
  • A: 251 mm (9.88 in)
  • B: Varies by version (e.g., 279 mm (11 in) for option A, 287 mm (11.3 in) for option B/C, 297 mm (11.7 in) for option D, 427 mm (16.8 in) for pneumatic options)
  • C: Varies by version (e.g., 479 mm (18.9 in) for option A, 450 mm (17.7 in) for option C, 497 mm (19.6 in) for option D, 483 mm (19.0 in) for pneumatic options)
• FQG62 Dimensions:
  • A: 272 mm (10.7 in)
  • B: Varies by version (e.g., 272 mm (10.7 in) for option A, 368 mm (14.5 in) for option B/C, 378 mm (14.9 in) for option D, 508 mm (20.0 in) for pneumatic options)
  • C: Varies by version (e.g., 560 mm (22 in) for option A, 580 mm (22.8 in) for option B, 570 mm (22.4 in) for option C, 578 mm (22.8 in) for option D, 602 mm (23.7 in) for pneumatic options)
• Mounting flange compatible with DN 100 PN16 and ANSI 4" 150 lbs.
• Fire-resistant version (WE): Dimension A is 305 mm (12 in) for FQG61 and 362 mm (14.3 in) for FQG62.

Radiation Emission Channel

• Located 9.5 mm (0.37 in) from the center of the mounting flange.
• Aligned with the lifting eye.
• Indicated by a mark on the mounting flange covering plate.
• Angle of emission options: 5°, 20°, 40°.
• Width of emission: FQG61: 10 mm (0.39 in); FQG62: 12 mm (0.47 in).
• Attenuation of useful beam: Approx. 0.3 half-value layers (FS = 1.2).

Weight

Materials

• Housing: 316Ti (1.4571) / S235JR (1.0038)
• Flange: 316L (1.4404)
• Other components use materials like 304 (1.4301), FKM, A2, A4, Brass, hardened steel, and cast aluminum depending on the version.
• Varnish for housing/flange: PUR 2K texture paint RAL1003.

Safety Equipment

• Padlock, cylinder lock, or locking bolt secure the ON/OFF position and protect against theft.
• Pneumatic Drive:
  • Swivel range: 180°.
  • Compressed air connection: G1/8.
  • Actuating pressure: 3.5 to 6 bar (51 to 87 psi).
  • Reset: Spring force.
  • Compressed air quality: ISO 8573-1 Class 3 (max. particle size 40 µm, pressure dewpoint -20°C or 10 K below ambient).

Environment

Ambient Temperature Range

• Manual switch-ON/switch-OFF: –40 to +200 °C (–40 to +392 °F).
• Pneumatic switch-ON/switch-OFF: –20 to +80 °C (–4 to 176 °F).
• Note: RFID tag usage may introduce temperature range restrictions.

Ambient Pressure

• Atmospheric pressure.

Vibration Resistance

• DIN EN 60068-2-64 test Fh; 10 to 2000 Hz; 1 g²/Hz.

Fire Resistance

• All versions: 5 minutes at 538 °C (1 000 °F) per ANSI N 43.8.
• Fire-resistant version (feature 670, option WE): 30 minutes at 821 °C (1 510 °F) per ISO 7205.

Degree of Protection

• IPx6 and NEMA TYPE 4.

Identification

• Nameplates: Detail information such as order code, serial number, radionuclide, activity, source number, and dose rate. Specific nameplates vary by order code option (A, B, C, D, K, L, M, N).
• RFID TAG: Identifies the measuring point without direct visual contact; data exchange via NFC technology.

Installation

Incoming Acceptance

• The source container serves as Type-A packaging for the radiation source.
• Package dimensions:
  • Without pneumatic actuator: 380 x 380 x 450 mm (15 x 15 x 17.7 in).
  • With pneumatic actuator: 380 x 380 x 600 mm (15 x 15 x 23.6 in).
• Radioactive warning labels must not be removed.

Transportation

• Transport according to provided illustrations, ensuring the suspension point is above the center of gravity.

Mounting Instructions

• Mounting can be via a nozzle directly on the vessel/pipe (non-pressure-bearing) or on external construction.
• Safety: Mounting and removal must be performed by certified personnel with monitored radiation exposure, with the switch in the "OFF" position secured by a padlock.
• Weights: FQG61: 40 to 50 kg (88.2 to 110.25 lbs); FQG62: 87 to 97 kg (191.84 to 213.89 lbs).

Orientation

• Level Measurement: Mount at or slightly above the maximum level, aligned with the detector. Minimize distance to the product vessel to avoid control zones.
• Point Level Detection: 5° angle of emission is recommended. Ensure the beam is horizontal by orienting the eyelet horizontally for larger angles.
• Density Measurement: Recommended on vertical pipelines with bottom-to-top flow. Horizontal beam path for horizontal pipes. Diagonal beam or measurement section can be used for improved effect.
• Fireproof Version:
  • Orientation I (Recommended): Compensation compartment at the highest point.
  • Orientation II: Compensation compartment at the bottom or side (if Orientation I is not feasible).

Mounting Device (Customer Supplied)

• Can be mounted on mounting plates or L-profiles.
• Dimensions for mounting plate/L-profiles are provided.
• Mounting flange is compatible with DN 100 PN16 and ANSI 4" 150lbs.

Toothed Lock Washers

• Must be used on two flange screws to ensure electrical contact between the container and mounting support for integration into the plant's potential equalization system.

Tightening Torque for Mounting Screws

• Stainless Steel (70): 50 to 140 Nm (36.87 to 103.25 lbf ft).
• Steel (8.8): 50 to 140 Nm (36.87 to 103.25 lbf ft).

Post-Installation Check

• Measure local dose rate around the source container and detector after installation.
• Shielding may be required for radiation outside the emission channel due to scattering.
• Measure and cordon off control/exclusion areas if necessary, especially when the product vessel is empty.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

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