GASKET STYLES

VACUUM SERVICE

Lede standard gaskets are designed to seal well under
vacuum conditons up to 10 inHg (254 mmHg) which may
occur when a system is drained. For conntinuous services
greater than 10 inHg (254 mmHg), the use of GapSeal
gaskets or EP (end protection) gaskets in combination with
rigid style couplings is recommended. Contact Lede for
specific recommendations.

DRY PIPE AND FREEZER SERVICES
Due to the number of Lede products offered and the
variety of service applications, a wide variety of gaskets are
available. Even though the products and gaskets may look
Lede recommends the use of GapSeal Grade E gaskets
for dry pipe fire protection systems and freezer
applications. The GapSeal gasket close off the gap between
the pipes or gasket cavity. This will prevent any remaining
liquid from entering the cavities and freezing when the
temperature drops.

Do not use the normal lubricant for dry pipe and freezer
systems. Always use a petroleum free silicone based
lubricant.
Rigid couplings are preferred for dry pipe, freezer and
vacuum applications. Reducing couplings are not
recommended for these applications.