FAQs

General

Where can I find pricing and availability?

Information on pricing, availability, and lead time (delivery) for DSTI products / solutions can be obtained via our Sales Inquiry request process or by phone or email.

Do you sell direct or do I have to purchase through a distributor?

We accept direct orders through our Sales Inquiry request process or by phone or email. We also sell through our network of sales and distribution partners. View our Sales & Distributor Locations

Where can I find literature and part model downloads for your products?

For product catalogs and industry brochures, please see Literature Downloads. PDF, DWG, and STEP files for specific part models can be accessed by clicking "View Formats" under "Part Downloads" from the "Available Configurations" table on each product page. A dsti.com account is required for downloading DWG and STEP files. Don't worry, creating a new dsti.com account is fast and easy - and it's free!

Fluid Rotary Unions

What is a rotary union?

A rotary union (or swivel joint) is a device used to transfer fluid under pressure or vacuum from a stationary inlet to a rotating outlet, preserving and isolating the fluid connection. Learn more about What is a Rotary Union?

How do I choose a rotary union?

Proper selection of a rotary union solution requires details about your application's operating parameters including pressure, speed, media type(s), number of flow passages (channels), and connection size(s) / type(s). A good place to start your search is with our Standard Rotary Unions. If you are confident that a custom / modified solution is most likely required or need assistance in your selection, contact us to Get Started. Our experts are here for you.

Do you offer custom rotary unions?

Yes, it's what we do best! We can meet your exact fluid rotary union requirements from modifying our standard products to complete, custom design and manufacturing. For more information see Custom Solutions

What is your process for a custom rotary union solution?

First, contact us to Get Started. Our team will reach out to you to start learning more about your project's technical and delivery requirements. We will consider all aspects of your application and work together to develop the best solution. We typically start by evaluating our in-stock standard product options, reviewing our extensive library of custom rotary union designs, and examining a complete custom solution.

We will present a detailed proposal including proposed design, cost breakdown, and project timeline. You will be assigned a sales engineer and project manager so you know who to go to with any questions throughout the process. For more information see Custom Solutions

Do you offer compatible options for replacing another manufacturer's fluid rotary union?

Yes, we can cross reference other manufacturer's fluid rotary unions to find an equivalent solution. Contact us to Get Started

Can your standard rotary unions be modified to meet the requirements of my application?

We can modify our standard rotary unions to fit your needs. Custom modifications to our standard products are quite common and easier than you may think. Modifications include changes to housing / shaft dimensions and materials, seal types, mounting configurations, connection sizes and types, and flow passage configurations. For more information see Standard Rotary Union Modifications

Do you offer replacement seals and/or bearings for rebuilding your rotary unions?

Yes, seal and bearing kits are available for our rotary union products for on-location rebuilding and repair. Contact us to Get Started

Electrical Slip Rings

What is a slip ring?

An electrical slip ring is a device used to transfer power and data from a stationary to a rotating structure. Slip rings can provide continuous or intermittent rotation while transmitting power and data - simplifying operation, improving application performance, and eliminating risk of damage to wiring between movable parts. See Electrical Slip Rings

How do I choose a slip ring?

Proper selection of a slip ring solution requires details about your application's operating parameters including total circuits, voltage and amps per circuit, operating speed, and mounting type. A good place to start your search is with our Standard Slip Rings. If you are confident that a custom / modified solution is most likely required or need assistance in your selection, contact us to Get Started. Our experts are here for you.

Do you offer electrical slip ring / fluid rotary union combination assemblies?

Yes, DSTI fluid rotary union and electrical slip ring technology can be integrated together into one complete solution for fluid, power, signal, and data transfer. We offer both standard (in-stock) assemblies and custom solutions designed to meet your exact requirements. For more information see Fluid + Electrical Solutions

Do you offer custom slip rings?

Yes, we work directly with our slip ring partners to design custom solutions to meet your exact electrical requirements. For more information please see Custom Slip Rings

Warranty & Returns

Where can I find your product warranty information?

For warranty information please see Product Warranty

What is your return policy?

All custom products and electrical components (including electrical slip rings) are non-returnable. All returnable standard products are subject to a 20% restocking fee. A Return Merchandise Authorization (RMA) number is required prior to returning DSTI products. For more information see Return Policy

How do I return a product for warranty evaluation or repair?

A Return Merchandise Authorization (RMA) number is required prior to returning any DSTI products for warranty evaluation or repair. For more information see Return Policy. See also Do you offer replacement seals and/or bearings for rebuilding your rotary unions?

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