--- title: "Customer FAQ and Help Center | MPF" canonicalUrl: "https://mpfpi.com/resources/frequently-asked-questions/" excerpt: "Frequently Asked Questions About Your Ultra High Vacuum System MPF’s Precision High Vacuum Components Does MPF Manufacture Custom Designs? Yes. MPF’s in-house technical experts have worked with thousands of clients to offer input on the design of your custom UHV system. Our standard catalog includes 2,200 standard components. But we excel in the manufacture of custom components and bespoke ultra high vacuum systems for your specific requirements. We guarantee accurate quotes on your custom UHV components and system. Contact our team for more information. What is the Voltage on MPF’s Power Feedthroughs? MPF sells power feedthroughs of various voltages. From 500 […]" metaDescription: "New customer FAQ. How can MPF help me build my ultrahigh vacuum? Maintaining your high vacuum system. Shipping Questions. MPF products." datePublished: "2024-05-02T19:11:48-04:00" dateModified: "2026-03-23T11:03:34-04:00" --- - Customer FAQ and Help Center | MPF # Frequently Asked Questions About Your Ultra High Vacuum System ## MPF’s Precision High Vacuum Components ** ** Does MPF Manufacture Custom Designs? Yes. MPF’s in-house technical experts have worked with thousands of clients to offer input on the design of your custom UHV system. Our standard catalog includes 2,200 standard components. But we excel in the manufacture of custom components and bespoke ultra high vacuum systems for your specific requirements. We guarantee accurate quotes on your custom UHV components and system. Contact our team for more information. ** ** What is the Voltage on MPF’s Power Feedthroughs? MPF sells power feedthroughs of various voltages. From 500 volts all the way up to 100KVs, our high-voltage feedthroughs have been used in industry applications ranging from healthcare to food safety. Our high-voltage feedthroughs come in a variety of configurations with different ceramic lengths for all types of assemblies. Check out our standard inventory of power feedthroughs [here](https://mpfpi.com/product-category/power-feedthroughs/voltage-power-feedthrough/). ** ** What Optical Coatings Are Available on Our UHV Viewports? MPF viewports are designed with UV and EUV grade Fused Silica and Sapphire. We offer the following coatings on all our UHV viewports: Anti-Reflection (AR) - ITO - High-Reflective - Dielectric - Enhanced Metal - Partial Reflector - Low Loss and Low Absorption [Contact us](https://mpfpi.com/contact/) to learn more about our optical components for viewports and assemblies. ** ** How Much Standoff Do Our Electric Isolators Allow? While our standard electric isolators (high-voltage breaks) offer voltage standoff of between 5KV to 60KV, MPF custom manufactures isolators of up to 225,000. Every UHV isolator from MPF is manufactured as a metal adapter, hermetically bonded to each end of alumina ceramic, allowing for voltage standoff at each end. Shop all of our Isolators [here](https://mpfpi.com/product-category/uhv-isolators/). ** ** Can MPF Mount Feedthroughs and Viewports to Your Assembly? Yes. MPF not only makes custom parts, but has the ability to attach them to both standard and specialty assemblies. We install custom flanges, mounts, and plates to your assembly. We can mount the following stainless steel and titanium flanges to your ultra-high vacuum chamber: - ISO Flanges - KF/QF (Qwik, Kwik, Clamp, and Claw Style) Flanges - Wire-Seal Flanges - ASA/ANSI Flanges - JIS (Japan-Industry Standard) Flanges [Contact us](https://mpfpi.com/contact/) to learn more about our custom mounting capabilities. ** ** How Does MPF Ensure a Hermetic Seal for Our Feedthroughs? All of our components for high vacuum assemblies utilize our patented ceramic-to-metal sealing technology. Additionally, we verify that all of our designs are hermetically-sealed through [Helium Leak Detection](https://mpfpi.com/resources/leak-detection-science/). Why do you need ceramic-to-metal sealing? Feedthroughs with ceramic-to-metal sealing provide the highest mechanical strength and electrical insulation, maintaining the integrity of joints at the most extreme temperatures and in the harshest environments. ## Maintenance of Components and Quality Control ** ** Can You Apply Voltage to an Electrical Feedthrough or Connector Before Pumping Your System Down and Achieving a Vacuum Atmosphere? No. In low vacuum (1×10-1 to 1×10-3) your system is in the glow-discharge area. During this phase of the pump-down process, you have an ionized environment. Applying voltage during pump down will create an electrical short. [See our White Paper on Glow-Discharge Phenomena for more information.](https://mpfpi.com/resources/glow-discharge-phenomena/) ** ** Can I Clean My Viewport with Soap and Water? No. They are very specific instructions on cleaning your viewport depending on the type. [Please see our UHV Viewport Cleaning Notes for more information.](https://mpfpi.com/resources/uhv-viewport-cleaning-notes/) ** ** Does MPF Have Quality Control Measures in Place? MPF carries the prestigious ISO-9001 2015 certification. The International Organization for Standardization (ISO) has verified that all of the processes MPF employs in the manufacture of vacuum vessel components adhere to the most stringent standards. ** ** How Does MPF Test for Leaks in Our Components? We employ a helium leak detector to measure for leaks at <1×10-9 atm cc/sec. We can also verify up to 1×10 -10 upon request. ** ** Do You Have a List of All Your Testing and Quality Control Equipment? You bet. [Click here](https://mpfpi.com/company/mpf-capabilities/) to learn about our Pressure Testing, Magnetic Permeability Testing, and more. ## Shipping and Warranty ** ** Do You Ship Outside the United States? Yes. Through our website, you can purchase our vacuum vessel components to ship anywhere in the world. ** ** How Long Until My Order Ships? Standard parts typically ship within a few weeks.  You can request lead times via email. [Please see our UHV Viewport Cleaning Notes for more information.](https://mpfpi.com/resources/uhv-viewport-cleaning-notes/) ** ** What is Your Return Policy? MPF guarantees all of its products against defects in production and listed performance data for 365 days after receipt of item. We will also accept returns of unused standard catalog items within 365 days of receipt, as long as the items are returned in their original packaging. A restocking fee may be charged in some cases. Custom items cannot be returned. ** ** Does MPF adopt the F.O.B. shipping arrangement? Yes, MPF Products, Inc. adopts the F.O.B. Origin shipping arrangement as part of its logistics strategy. By leveraging this approach, our company ensures a streamlined and transparent process for the transportation of goods. Once products are loaded onto the transportation vessel at our facility, the responsibility and associated risks transition to the buyer. ## Questions about Checkout and Stripe: ** ** How do I place an order if I am tax exempt? Before placing an order, create an account and upload your Tax Exemption Certificate. An MPF employee will be notified and will approve your certificate. (This could take up to 24 hours) ** ** What if I am in a hurry and cannot wait for an employee to approve my Tax Exemption Certificate? Place your order and then contact [Customer Service](https://mpfpi.com/contact/) to let them know you uploaded your Tax Exemption Certificate. Once approved, the sales tax will then be refunded back to the card that was used for the purchase. ** ** I placed my order and I am Tax Exempt, but I didn't upload my Tax Exemption Certificate. I was charged tax, can the sales tax charge be refunded? Yes, please contact [Customer Service](https://mpfpi.com/contact/) for your refund.  ** ** I can't get my credit card to process, how do I place my order? If you are having trouble placing your order, please contact [Customer Service](https://mpfpi.com/contact/) to place your order.  ** ** I've already paid for standard ground shipping, but I will need it shipped over night. Can I change the shipping method? Yes, if your order has not already shipped, you will need to contact[Customer Service](https://mpfpi.com/contact/) and let them know you would like to upgrade your shipping method. Additional shipping charges will apply. ** ** Can I place my order online using my freight collect number? No, unfortunately, it is not capable of doing this. To use your freight collect you would need to contact [Customer Service](https://mpfpi.com/contact/) to place your order and provide them with your freight collect information.  ** ** When I place my order online, is the Order Number the same as the Purchase Order Number? Yes, we use the Order Number to identify an order.  Business Resources ##### [2025 MPF Brochure](https://mpfpi.com/resources/mpf-brochure-2025/) ##### [Export Compliance](https://mpfpi.com/resources/export-compliance/) ##### [ISO Certification](https://mpfpi.com/resources/iso-certification/) ##### [ITAR Registration](https://mpfpi.com/resources/itar-registration/) ##### [MPF Products Inc. Material Sourcing Declaration](https://mpfpi.com/resources/mpf-products-inc-material-sourcing-declaration/) ##### [Product Capabilities](https://mpfpi.com/resources/product-capabilities/) ##### [Terms and Conditions](https://mpfpi.com/resources/terms-and-conditions/) ##### [Warranty – Compatibility Mode](https://mpfpi.com/resources/warranty-compatibility-mode/) Technical Resources ##### [Barrel Contact](https://mpfpi.com/resources/barrel-contact/) ##### [BNC Coax Cable Build Instructions](https://mpfpi.com/resources/bnc-coax-cable-build-instructions/) ##### [Choosing the Right Vacuum Feedthroughs, Flanges & Hermetic Components](https://mpfpi.com/resources/choosing-uhv-feedthroughs-cf-vs-kf/) ##### [Coaxial Rating](https://mpfpi.com/resources/coaxial-rating/) ##### [Frequency vs Wavelength Charts](https://mpfpi.com/resources/frequency-vs-wavelength-charts/) ##### [Fused Silica Laser-Induced-Damage](https://mpfpi.com/resources/fused-silica-laser-induced-damage/) ##### [Laser Damage Considerations](https://mpfpi.com/resources/laser-damage-considerations/) ##### [Leak Detection Science](https://mpfpi.com/resources/leak-detection-science/) ##### [MS Style Connector Assembly Instructions](https://mpfpi.com/resources/ms-style-connector-assembly-instructions/) ##### [Pressure Testing](https://mpfpi.com/resources/pressure-testing-2/) ##### [Product Sheet Connectivity](https://mpfpi.com/resources/product-sheet-connectivity/) ##### [Sealing Technology Breakdown](https://mpfpi.com/resources/sealing-technology-breakdown/) ##### [SHI-1 Helium Mass Spectrometer Leak Detection](https://mpfpi.com/resources/shi-1-helium-mass-spectrometer-leak-detection/) ##### [Temperature Information](https://mpfpi.com/resources/temperature-information/) ##### [The Science of Hermetic Sealing: Protecting Critical Systems Across Harsh Environments](https://mpfpi.com/resources/science-of-hermetic-sealing/) ##### [Thermocouple Reference Chart](https://mpfpi.com/resources/thermocouple-reference-chart/) ##### [Viewport Transmission Chart](https://mpfpi.com/resources/viewport-transmission-chart/) ##### [What Is Ultra-High Vacuum (UHV)?](https://mpfpi.com/resources/what-is-uhv-and-industries-that-use-it/)