--- title: "FAQs" canonicalUrl: "https://mpfpi.com/faqs/" dateModified: "2026-07-06T04:38:01+00:00" --- FAQs Archive - MPF Products, Inc. # FAQs ### [When I place my order online, is the Order Number the same as the Purchase Order Number?](https://mpfpi.com/faq/when-i-place-my-order-online-is-the-order-number-the-same-as-the-purchase-order-number/) Yes. MPF uses the Order Number to identify the order. [Read More](https://mpfpi.com/faq/when-i-place-my-order-online-is-the-order-number-the-same-as-the-purchase-order-number/) ### [Can I place my order online using my freight collect number?](https://mpfpi.com/faq/can-i-place-my-order-online-using-my-freight-collect-number/) No. Online checkout cannot use a freight collect number. Contact Customer Service to place the order and provide freight collect details. [Read More](https://mpfpi.com/faq/can-i-place-my-order-online-using-my-freight-collect-number/) ### [I’ve already paid for standard ground shipping, but I will need it shipped over night. Can I change the shipping method?](https://mpfpi.com/faq/ive-already-paid-for-standard-ground-shipping-but-i-will-need-it-shipped-over-night-can-i-change-the-shipping-method/) Yes, if the order has not already shipped. Contact Customer Service to request an upgraded shipping method. Additional shipping charges will apply. [Read More](https://mpfpi.com/faq/ive-already-paid-for-standard-ground-shipping-but-i-will-need-it-shipped-over-night-can-i-change-the-shipping-method/) ### [I can’t get my credit card to process, how do I place my order?](https://mpfpi.com/faq/i-cant-get-my-credit-card-to-process-how-do-i-place-my-order/) If a credit card will not process online, contact Customer Service for help placing the order. [Read More](https://mpfpi.com/faq/i-cant-get-my-credit-card-to-process-how-do-i-place-my-order/) ### [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?](https://mpfpi.com/faq/i-placed-my-order-and-i-am-tax-exempt-but-i-didnt-upload-my-tax-exemption-certificate-i-was-charged-tax-can-the-sales-tax-charge-be-refunded/) Yes. Contact Customer Service to request a refund for the sales tax charge. [Read More](https://mpfpi.com/faq/i-placed-my-order-and-i-am-tax-exempt-but-i-didnt-upload-my-tax-exemption-certificate-i-was-charged-tax-can-the-sales-tax-charge-be-refunded/) ### [What if I am in a hurry and cannot wait for an employee to approve my Tax Exemption Certificate?](https://mpfpi.com/faq/what-if-i-am-in-a-hurry-and-cannot-wait-for-an-employee-to-approve-my-tax-exemption-certificate/) Place the order, then contact Customer Service to let MPF know the certificate was uploaded. After approval, sales tax can be refunded to the card used for purchase. [Read More](https://mpfpi.com/faq/what-if-i-am-in-a-hurry-and-cannot-wait-for-an-employee-to-approve-my-tax-exemption-certificate/) ### [How do I place an order if I am tax exempt?](https://mpfpi.com/faq/how-do-i-place-an-order-if-i-am-tax-exempt/) Create an account before ordering and upload your Tax Exemption Certificate. An MPF employee will review and approve the certificate, which may take up to 24 hours. [Read More](https://mpfpi.com/faq/how-do-i-place-an-order-if-i-am-tax-exempt/) ### [Does MPF adopt the F.O.B. shipping arrangement?](https://mpfpi.com/faq/does-mpf-adopt-the-f-o-b-shipping-arrangement/) Yes. MPF uses an F.O.B. Origin shipping arrangement. Once products are loaded onto the carrier at MPF’s facility, responsibility and shipping risk transfer to the buyer. [Read More](https://mpfpi.com/faq/does-mpf-adopt-the-f-o-b-shipping-arrangement/) ### [What is Your Return Policy?](https://mpfpi.com/faq/what-is-your-return-policy/) MPF guarantees products against production defects and listed performance-data issues for 365 days after receipt. Unused standard catalog items may be returned within 365 days if they are in original packaging. Restocking fees may apply, and custom items cannot be returned. [Read More](https://mpfpi.com/faq/what-is-your-return-policy/) ### [How Long Until My Order Ships?](https://mpfpi.com/faq/how-long-until-my-order-ships/) Standard parts typically ship within a few weeks. Customers can request current lead-time information by email. [Read More](https://mpfpi.com/faq/how-long-until-my-order-ships/) ### [Do You Ship Outside the United States?](https://mpfpi.com/faq/do-you-ship-outside-the-united-states/) Yes. MPF vacuum vessel components can be purchased through the website and shipped worldwide. [Read More](https://mpfpi.com/faq/do-you-ship-outside-the-united-states/) ### [Do You Have a List of All Your Testing and Quality Control Equipment?](https://mpfpi.com/faq/do-you-have-a-list-of-all-your-testing-and-quality-control-equipment/) Yes. MPF provides information about its testing and quality-control capabilities, including pressure testing, magnetic permeability testing, and related equipment. [Read More](https://mpfpi.com/faq/do-you-have-a-list-of-all-your-testing-and-quality-control-equipment/) ### [How Does MPF Test for Leaks in Our Components?](https://mpfpi.com/faq/how-does-mpf-test-for-leaks-in-our-components/) MPF uses a helium leak detector to test for leaks at less than 1 x 10^-9 atm cc/sec. Verification up to 1 x 10^-10 may also be available by request. [Read More](https://mpfpi.com/faq/how-does-mpf-test-for-leaks-in-our-components/) ### [Does MPF Have Quality Control Measures in Place?](https://mpfpi.com/faq/does-mpf-have-quality-control-measures-in-place/) Yes. MPF carries ISO 9001:2015 certification, meaning its vacuum vessel component manufacturing processes meet stringent quality-management standards. [Read More](https://mpfpi.com/faq/does-mpf-have-quality-control-measures-in-place/) ### [Can I Clean My Viewport with Soap and Water?](https://mpfpi.com/faq/can-i-clean-my-viewport-with-soap-and-water/) No. Viewports require specific cleaning procedures based on viewport type. Use MPF’s UHV viewport cleaning guidance rather than soap and water. [Read More](https://mpfpi.com/faq/can-i-clean-my-viewport-with-soap-and-water/) ### [Can You Apply Voltage to an Electrical Feedthrough or Connector Before Pumping Your System Down and Achieving a Vacuum Atmosphere?](https://mpfpi.com/faq/can-you-apply-voltage-to-an-electrical-feedthrough-or-connector-before-pumping-your-system-down-and-achieving-a-vacuum-atmosphere/) No. During low-vacuum pump down, the system can pass through a glow-discharge region with an ionized environment. Applying voltage during this phase can create an electrical short. [Read More](https://mpfpi.com/faq/can-you-apply-voltage-to-an-electrical-feedthrough-or-connector-before-pumping-your-system-down-and-achieving-a-vacuum-atmosphere/) ### [How Does MPF Ensure a Hermetic Seal for Our Feedthroughs?](https://mpfpi.com/faq/how-does-mpf-ensure-a-hermetic-seal-for-our-feedthroughs/) MPF uses ceramic-to-metal sealing technology for high-vacuum assemblies and verifies hermetic performance through helium leak detection. Ceramic-to-metal sealing provides mechanical strength and electrical insulation in harsh environments and extreme temperatures. [Read More](https://mpfpi.com/faq/how-does-mpf-ensure-a-hermetic-seal-for-our-feedthroughs/) ### [Can MPF Mount Feedthroughs and Viewports to Your Assembly?](https://mpfpi.com/faq/can-mpf-mount-feedthroughs-and-viewports-to-your-assembly/) Yes. MPF can attach custom parts to both standard and specialty assemblies, including custom flanges, mounts, and plates. Mounting options include ISO, KF/QF, wire-seal, ASA/ANSI, and JIS flanges for ultra-high-vacuum chambers. [Read More](https://mpfpi.com/faq/can-mpf-mount-feedthroughs-and-viewports-to-your-assembly/) ### [How Much Standoff Do Our Electric Isolators Allow?](https://mpfpi.com/faq/how-much-standoff-do-our-electric-isolators-allow/) Standard MPF electric isolators, also known as high-voltage breaks, provide voltage standoff from 5KV to 60KV. Custom isolators can be manufactured for applications requiring up to 225,000 volts of standoff. Each UHV isolator is built as a metal adapter hermetically bonded to alumina ceramic for voltage standoff at each end. [Read More](https://mpfpi.com/faq/how-much-standoff-do-our-electric-isolators-allow/) ### [What Optical Coatings Are Available on Our UHV Viewports?](https://mpfpi.com/faq/what-optical-coatings-are-available-on-our-uhv-viewports/) MPF viewports use UV and EUV grade fused silica and sapphire. Available coating options include anti-reflection, ITO, high-reflective, dielectric, enhanced metal, partial reflector, low-loss, and low-absorption coatings. [Read More](https://mpfpi.com/faq/what-optical-coatings-are-available-on-our-uhv-viewports/) ### [What is the Voltage on MPF’s Power Feedthroughs?](https://mpfpi.com/faq/what-is-the-voltage-on-mpfs-power-feedthroughs/) MPF offers power feedthroughs across a wide voltage range, from 500 volts up to 100KV. These high-voltage feedthroughs are used in applications including healthcare and food safety, and are available in different configurations and ceramic lengths. [Read More](https://mpfpi.com/faq/what-is-the-voltage-on-mpfs-power-feedthroughs/) ### [Does MPF Manufacture Custom Designs?](https://mpfpi.com/faq/does-mpf-manufacture-custom-designs/) Yes. MPF technical specialists help customers design custom UHV systems, custom components, and bespoke ultra-high-vacuum assemblies. MPF also provides quotes for custom UHV components and systems. [Read More](https://mpfpi.com/faq/does-mpf-manufacture-custom-designs/)