Viega Megapress, Installation Manual

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based additives makes it ideal for seals and
gaskets in solar, district heating, low-pressure
steam and compressed air system fittings. It can
withstand heat spikes up to 356°F.
Viega ProPress HNBR sealing element
This sealing element is used mainly for applications
of natural gas, propane, mixed and manufactured
fuel gases in the vapor state (not in the liquid state).
It is commonly used in fuel oil heating systems.
HNBR, or Hydrogenated Nitrile Butadiene Rubber,
is yellow in color for easy identification.
Ambient operating temperature:
-40°F to 180°F (-40°C to 82°C)
HNBR is widely known for its physical strength and
retention of properties after long-term exposure to
heat, oil and chemicals.
The unique properties attributed to HNBR have
resulted in wide adoption of HNBR in automotive,
industrial and assorted high-performance applications
(e.g. engine seals, grommets, gaskets, fuel system
seals and hoses, transmission system bonded piston
seals, oil field packers and rotary shaft seals).
With its excellent performance for the most
demanding of applications, HNBR is the ideal choice
for applications needing excellent physical properties
as well as oil, heat and/or chemical resistance.
For specific applications, please contact your
local Viega District Manager or contact Viega
at 1-800-976-9819.
1.4.6 Fitting markings
Markings on Viega ProPress fittings include:
• Green Dot: EPDM sealing element and Smart
Connect feature
• Size of fitting
• Manufacturer name
• Manufacturer date code
Markings on Viega ProPressG fittings include:
• Yellow Dot: HNBR sealing element and Smart
Connect feature
• CSA: indicates certification to ANSI/CSA LC4
• Yellow rectangle: identifies Viega ProPressG
fitting as a certified gas or fuel oil fitting
• 125G: identifies the CSA maximum pressure
rating of the fitting for fuel oil or gas
applications
• Size of fitting
• Manufacturer name
• Manufacturer date code
Markings on Viega ProPress for Stainless 316
include:
• Green dot: EPDM sealing element and Smart
Connect feature
• Stainless steel alloy number
• Size of fitting
• Manufacturer name
• Manufacturer date code
Markings on Viega ProPress for Stainless 304
include:
• White dot: FKM sealing element and Smart
Connect feature
• Stainless steel alloy number
• Size of fitting
• Manufacturer name
• Manufacturer date code