Varian RAD-21 Sapphire Rotating-Anode X-Ray Tube

The Varian RAD-21 Sapphire is a high-performance X-ray tube designed for demanding diagnostic environments. Built with a 4-inch (100 mm) rotating anode and a 300 kHU heat capacity, this tube is engineered to handle the thermal stress of heavy-duty general radiography and fluoroscopic spot-filming. The Sapphire housing is a clinical standard, recognized for its superior radiation shielding and efficient oil-cooled heat dissipation.

This unit features a 12° tungsten-rhenium-molybdenum target with dual focal spots (0.6 mm and 1.2 mm), providing the versatility to switch between high-detail extremity imaging and high-power abdominal or chest radiography.

Key Features

• Manufacturer: Varian Medical Systems (Varex Imaging)

• Tube Type: RAD-21

• Housing Model: Sapphire

• Date of Manufacture: December 2013

• Anode Heat Capacity: 300 kHU

• Maximum Voltage: 150 kV

• Focal Spots: 0.6 mm (Fine) / 1.2 mm (Large)

• Target Angle: 12°

• Target Material: Tungsten-Rhenium-Molybdenum

Clinical & Operational Advantages

• High Thermal Stability: The 300 kHU capacity ensures consistent performance during peak patient hours, allowing for back-to-back exposures without overheating.

• Dual Focal Spot Precision: The 0.6 mm focal spot is ideal for orthopedic work where fine bone detail is required, while the 1.2 mm spot provides the power needed for bariatric or deep-tissue imaging.

• Standard Integration: As a widely used Varian model, the RAD-21 is compatible with a vast array of OEM and third-party X-ray generators and stands, simplifying the replacement process.

• Sapphire Housing Reliability: The Sapphire housing is known for its rugged construction and stable electrical insulation, ensuring a long service life and high safety margins.

Condition

• Status: Used – Harvested System Subcomponent.

• Extraction Note: This tube was professionally removed from a decommissioned imaging system. It was handled with care to preserve the integrity of the housing, bellows, and high-voltage receptacles.

• Functional Assessment: Being sold in "As-Removed" condition. While the tube was operational at the time of extraction, it is the buyer’s responsibility to perform a professional vacuum check and "seasoning" (warm-up) procedure per manufacturer protocols prior to clinical use.

• Serial Numbers: Housing: H216053 | Insert: 76783-Y3.

Warranty

• ✔ Primis "Safe-Arrival" Guarantee We guarantee the tube will arrive without physical damage to the housing or oil leaks. Due to the sensitive nature of vacuum-sealed imaging components, the buyer is responsible for verifying internal gas/vacuum integrity upon installation by a qualified physicist or biomeds.

What’s Included

• (1) Varian RAD-21 X-Ray Tube in Sapphire Housing

Shipping

• Freight / Specialized Handling: Due to weight and the fragile nature of the glass insert and oil-filled housing, this item will be double-boxed or crated for maximum protection.

• Ships within 1-2 business days.