---
title: "Viewports"
canonicalUrl: "https://mpfpi.com/faq-category/viewports/"
dateModified: "2026-07-28T16:06:39+00:00"
---

Viewports Archives - MPF Products, Inc.
# Viewports

###  [How do you calculate the pressure safety factor for a vacuum viewport?](https://mpfpi.com/faq/how-do-you-calculate-the-pressure-safety-factor-for-a-vacuum-viewport/)

Viewport safety factors are determined by evaluating the window material’s flexural strength relative to the clear aperture diameter and glass thickness. A minimum 4:1 ratio against atmospheric pressure load is the standard design target. Material selection is a critical input: fused silica offers superior UV transmission and thermal stability, borosilicate

[Read More](https://mpfpi.com/faq/how-do-you-calculate-the-pressure-safety-factor-for-a-vacuum-viewport/)