MPF

(864) 876-9853 | CART

Expertly Engineered
Ceramic To Metal Technology

Over-Pressure Protection Viewports

UHV material processing frequently involves the introduction of gases at regulated pressures. In the event of an unintentional or inadvertent pressure burst, fragile components such as vacuum viewports are subject to damage. Whereas burst discs or pressure relief valves can mitigate risk, windows proofed to withstand such pressure can avoid catastrophic rupture in critical UHV applications.

Conflat™ flanges, the most commonly used for UHV, cannot be rated per the ASME boiler pressure vessel code. The upper limit of pressure for such flanged joints is dependent upon the system mating flange; the material and hardness of the gasket; and, the strength and torque of fasteners. The use of Conflat™ mounted, over-pressure protected viewports is not recommended for continuous or intentional use under pressure.*

Over-pressure protected viewports are fully tested at 150% of the rated pressure. For standard Conflat™ viewports, the maximum overpressure protection offered is 200 psi. The sapphire window assemblies are designed with greater than 10x safety factor and tested to 300 psi.

*For pressure applications, MPF can provide safe designs utilizing ASME B16.5 flanges. MPF has designed viewports for service up to 20 kpsi using customer specified mounts.

Over-Pressure Protection UV Sapphire Viewports Specifications

Leak Rate: Less than 2x10(-10) atm cc/sec He
Parallelism: 3 arc-minutes or less
Flange Material:  304 stainless steel
Surface Finish: 50/20 
Material:  Sapphire
UV Transmission:  50% @ 250nm
Orientation: 
Over-Pressure Limit: 200 psi (tested to 300 psi)



Over-Pressure Protection UV Sapphire Viewports Specifications



STEP Ø "A" VIEW Ø "B" Ø "C" "D" "E" PART # PRICE PDF

Download Step File
0.75 1.23 2.75CF 0.25 0.50 A12819-1-CF $750.00
Download PDF

Download Step File
1.50 1.98 4.50 CF 0.35 0.68 A12820-1-CF $1125.00
Download PDF

Download Step File
2.00 2.48 6.00 CF 0.41 0.78 A12821-1-CF $1775.00
Download PDF
Sort By:   Then Sort By:
Records Per Page:    
down
VIEWPORT, SAPPHIRE, UV, OVER-PRESSURE, 0.75 VIEW, 275CF
VIEWPORT, SAPPHIRE, UV, OVER-PRESSURE, 0.75 VIEW, 275CF
UV Grade Sapphire Viewport, Over-Pressure, 0.75" View Dia, 2.75" Conflat Flange More Info
Author Download PDF Drawing Publisher Download 3d step file
$750.00
View details
Part //: A12819-1-CF
 
VIEWPORT, SAPPHIRE, UV, OVER-PRESSURE, 1.50 VIEW, 450CF
VIEWPORT, SAPPHIRE, UV, OVER-PRESSURE, 1.50 VIEW, 450CF
UV Grade Sapphire Viewport, Over-Pressure, 1.50" View Dia, 4.50" Conflat Flange More Info
Author Download PDF Drawing Publisher Download 3d step file
$1,125.00
View details
Part //: A12820-1-CF
 
VIEWPORT, SAPPHIRE, UV, OVER-PRESSURE, 2.00 VIEW, 600CF
VIEWPORT, SAPPHIRE, UV, OVER-PRESSURE, 2.00 VIEW, 600CF
UV Grade Sapphire Viewport, Over-Pressure, 2.00" View Dia, 6.00" Conflat Flange More Info
Author Download PDF Drawing Publisher Download 3d step file
$1,775.00
View details
Part //: A12821-1-CF
 
up

Have questions about over-pressure protection viewports?

CONTACT US

Have a Question or Need a Custom Part? We’re Ready To Help.

Contact Us
 
  • MPF Products Inc.
  • 3046 Bramlett Church Road
  • Gray Court, SC 29645

 


  • Copyright © MPF Products, Inc. 2016. All Rights Reserved.

Get Immediate Access to Your Download and Receive Updates from MPF

* indicates required

You will only see this form once, but I don't want to give up my information, just take me to my download