LT Series
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Lightweight, Compact Rotary Unions LT Series FLOW PASSAGE OPTIONS

About DSTI What is a Rotary Union? Dynamic Sealing Technologies, Inc. (DSTI) serves a wide range of global industries as a leader in engineered fluid sealing and transfer solutions for rotating applications. Specifications & Operating Information Performance Data 10 LT 2 Passage Dimensions / Optional Equipment 12 LT 4 Passage Dimensions / Optional Equipment DSTI core business segments are fluid rotary unions, electrical slip rings, and value-added products and services―providing customers with a single-source solution from design and manufacturing through to testing and qualification―all under...

LT Series What is a Rotary Union? A rotary union (or swivel joint) is a mechanism used to transfer fluid (under pressure or vacuum) from a stationary inlet to a rotating outlet, preserving and isolating the fluid connection. Rotary unions are engineered to endure a wide range of temperatures and pressures for a variety of conditions and environments. In addition, rotary unions may integrate multiple passages and handle different types of fluid simultaneously. See examples at www.dsti.com/industries HOW DO I CHOOSE THE BEST ROTARY UNION FOR MY APPLICATION? Tell us about your requirements so we...

LT Series Overview Low Torque Seals Compact Design Lightweight Construction NPT / BSPT / O-Ring Connection Options Low Heat Generation Increased Seal Life Performance Cost-effective Fluid Transfer Solution Custom Modifications Available Available in 2, 4, 8, 12 and 24 passage models, the LT Series rotary unions are designed for air, gas and vacuum use and are ideal for a number of automation and robotic applications. These lightweight, compact rotary unions feature an all-aluminum construction and independent flow passages capable of transferring different types of media simultaneously. All...

LT Series How to Order: Create your Part Number LT OPTIONS See Next Page With Thru-bore PART NUMBER EXAMPLES LTM-2181 ■ LTM 8-Passage, 1/8" BSPT (Metric) Connections NOTE All LT Series rotary unions include thru-bores LTM LTM (Metric) Series (BSPT Connection) O-RING FACE SEAL GLAND CONNECTIONS If your application requires flush mounting the rotary union using the face of the shaft, optional O-ring face seal gland connections are available. Please specify “OF” when configuring the part number (see page 6). Dynamic Sealing Technologies, Inc | phone 866.700.3784 | web www.dsti.com | store...

LT Series How to Order: Choose your Options 2 Housing Mounting Flange Add “OF" for Optional Shaft O-ring Face Seal Gland Connections Shaft Mounting Flange OPTIONAL ELECTRICAL SLIP RINGS1 8 - 51 Circuits 240 Volts Ethernet NOTE (F1) Housing flange required for slip ring assembly PART NUMBER EXAMPLE LT-2121-ES6A-C1 ■ LT 2-Passage, 1/8” NPT Connections, Optional ES6A Electrical Slip Ring w/ (C1) Cover See Electrical Slip Ring Options on page 23 for full specs PART NUMBER EXAMPLE LT-2121-OF-ES12-F1-F2-C2 ■ LT 2 Passage, 1/8” NPT Housing Connections, Optional O-ring Face Seal Gland Connections,...

LT Series Specifications & Operating Information Retaining Ring Bearing Housing Seals Bearing Shaft Flow Passage Options Media Types Passage Sizes Connection Type Max. Operating Pressure Max. Vacuum Air/Gas4 1/8" and 3/8" (3.2 mm and 9.5 mm) NPT, Rc BSPT, O-ring Face Seals 600 PSI (40 BAR)1 30 HG1 Operating Temperature Body Material Type Shaft: E-Nickel, Housing: Blue Anodize Thru-bore Size Slip Ring Options Mounting Options Tapped holes are provided on both the housing and shaft for mounting the assembly. Mounting Flange Optional aluminum flange can be bolted onto the shaft end of the...

LT Series Performance Data: Pressure vs. Speed (Continuous) 1/8” PASSAGES SERIES 600 * This data is to be used as a general guideline. Data based on the product rotating continuously. Please consult DSTI about your specific application. * This data is to be used as a 50 general guideline. Data based on the product rotating continuously. Please consult DSTI about your specific application. store store.dsti.com | web www.dsti.com | phone 866.700.3784 | Dynamic Sealing Technologies

LT Series Performance Data: Pressure vs. Torque 1/8” PASSAGES SERIES 30 * This data is to be used as a general guideline. Torque data represents the minimum torque required to rotate based on all passages (ports) pressurized with oil/hydraulic media. Required torque to rotate may be greater when using other media types or dry running. For specific torque requirements, please contact DSTI to discuss your application. * This data is to be used as a general guideline. Torque data represents the minimum torque required to rotate based on all passages (ports) pressurized with oil/hydraulic media....

LT Series 2 Flow Passage: Dimensions A B * Porting holes (permanently plugged ball bearings Reference tolerances listed on the PDF Part Drawing. OPTIONAL O-RING FACE SEAL GLAND CONNECTION LT-2121-OF [LTM-2121-OF] Must specify when ordering. Please add “-OF” to the Part Number. (Example: LT-2121-OF) store store.dsti.com | web www.dsti.com | phone 866.700.3784 | Dynamic Seali

LT Series 2 Flow Passage: Optional Equipment OPTIONAL ELECTRICAL SLIP RING COVERS ES, ESE & ESM COVER (C2) Housing Flange Mount (F1) Required optional female pin connector (Add: “-PxF”) H standard plastic cord grip slip ring leads 36"-48" [914-1219mm] ØG optional male pin connector (Add: “-PMx”) OPTIONAL SHAFT & HOUSING FLANGE MOUNTS SHAFT FLANGE MOUNT (F2) ØI thru HOUSING FLANGE MOUNT (F1) Same as optional o-ring face connection dimensions on page 10 Reference tolerances listed on the PDF Part Drawing. Dynamic Sealing Technologies, Inc | phone 866.700.3784 | web www.dsti.com | store store.ds

LT Series 4 Flow Passage: Dimensions A E ball bearings * Porting holes (permanently plugged Reference tolerances listed on the PDF Part Drawing. OPTIONAL O-RING FACE SEAL GLAND CONNECTION LT-2141-OF [LTM-2141-OF] Must specify when ordering. Please add “-OF” to the Part Number. (Example: LT-2141-OF) store store.dsti.com | web www.dsti.com | phone 866.700.3784 | Dynamic Seali