The DSTI LT Series (Low Torque / Lightweight) Multi-Passage Rotary Unions, engineered and manufactured by Dynamic Sealing Technologies, Inc. (DSTI - USA), deliver advanced dynamic fluid sealing technology tailored specifically for high-speed automated machinery and robotic mechanisms requiring minimal installed weight and lowest possible rotational drag.

Unlike traditional heavy steel rotary unions designed primarily for extreme hydraulic pressures, the DSTI LT Series is strategically optimized for agility, energy efficiency, and low-inertia rotating equipment:
1. LT-100 Series (LT-101, LT-102, LT-103, LT-104, LT-106, LT-108, LT-110, LT-112): Designed with standard 1/8"-27 NPT port connections (or metric LTM BSPT options), featuring an ultra-compact body profile ideal for tight mechanical envelopes and payload-sensitive robot wrist joints.
2. LT-200 Series (LT-201, LT-202, LT-203, LT-204, LT-206, LT-208, LT-210, LT-212): Features 1/4"-18 NPT threaded ports (or metric LTM BSPT options), providing higher pneumatic flow capacities required for heavy-duty pneumatic actuators, air motors, and high-flow vacuum handling cups.

Key Engineering Features & Operational Advantages:
- All-Aluminum Lightweight Architecture: Precision-machined entirely from aircraft-grade aluminum alloy. Housings receive an anodized blue finish for superior corrosion and chemical protection, while shafts are coated with Electroless Nickel (E-Nickel) plating to maximize surface hardness, wear resistance, and minimize frictional resistance.
- Proprietary Low-Torque Sealing Technology: Equipped with DSTI’s custom-engineered elastomeric PTFE-based seal rings, which dramatically reduce breakaway torque and continuous running friction. This prevents thermal heat buildup, prolongs operational seal longevity, and permits the use of smaller, more energy-efficient drive servomotors.
- Completely Isolated Independent Media Channels: Internal passages are fully segregated, enabling simultaneous transfer of disparate media—such as 90 PSI compressed air for pneumatic cylinders, deep vacuum lines for suction pads, and inert purge gas—without any risk of cross-channel contamination.
- Integrated Thru-Bore & Electrical Slip Ring Compatibility: The LT Series incorporates a center through-bore design that allows passage of structural shafts or cabling, and connects directly with DSTI ES Series electrical slip rings for combined fluid, electrical power, and high-speed industrial communication protocols (Ethernet, Fieldbus).

Typical Industrial Applications:
- Industrial robot arm end-of-arm tooling (EOAT) in automotive, electronics assembly, and consumer goods packaging.
- High-speed Pick & Place automated transfer units and parts feeder systems.
- Rotary indexing tables, vacuum chuck fixtures, and semiconductor wafer handling equipment.
- Film winding machinery, rotary labeling equipment, umbilical reels, and pneumatic indexers.

• Manufacturer: DSTI (Dynamic Sealing Technologies, Inc.)
• Origin / Country of Manufacture: USA
• Product Series: LT Series Multi-Passage Low-Torque Lightweight Rotary Unions
• Models Covered: LT-101, LT-102, LT-103, LT-104, LT-106, LT-108, LT-110, LT-112, LT-201, LT-202, LT-203, LT-204, LT-206, LT-208, LT-210, LT-212
• Number of Flow Passages: 1, 2, 3, 4, 6, 8, 10, and 12 independent channels
• Nominal Passage Sizes:
  - LT-100 Group: 1/8" NPT (Passage diameter ~ 0.125" / 3.175 mm)
  - LT-200 Group: 1/4" NPT (Passage diameter ~ 0.250" / 6.35 mm)
• Thread Standards: Standard NPT female threads (BSPT metric threading available on LTM equivalents)
• Interface Mounting Options: Threaded side connections, optional shaft O-ring face seal glands for flush manifold mounting
• Maximum Operating Pressure: 600 PSI [40 BAR]
• Maximum Vacuum Rating: 30 in. Hg
• Maximum Rotational Speed: 500 RPM
• Operating Temperature Range: -18°C to 105°C (0°F to 220°F) (Custom high-temperature seal materials available upon request)
• Suitable Fluid Media: Compressed Air, Inert Gases (Nitrogen, Argon), Vacuum (Liquid media not recommended)
• Housing Material: Aluminum with Blue Anodized protective finish
• Shaft Material: Aluminum with Electroless Nickel Plating
• Dynamic Seal Technology: DSTI proprietary low-friction PTFE-based elastomeric seals
• Bearing Configuration: Dual pre-lubricated high-precision ball bearings for smooth, low-vibration operation
• Mechanical Integration: Central Thru-Bore layout, ready for direct mounting with DSTI electrical slip ring modules