Advertisement
Figure 2. Tagging Locations
Installing the High Flow
Model ES-660-HF Hatch
1. The Model ES-660-HF hatch can be installed on a
mating flange or roof deck with a standard 8 in. API
bolt pattern (16 – 9/16 in. holes on a 10 – 3/8 in.
bolt circle). For installation of the hatch directly to
the tank roof, place the base gasket on the bottom
of the hatch flange and place on tank roof with bolt
holes aligned.
2. Insert the 16 bolts from the bottom up by reaching
inside the tank, through the hatch opening and
attach each nut to the bolt from the outside. Tighten
all nuts in a circular manner and ensure the hatch is
fastened securely.
3. For installation of the Model ES-660-HF hatch to a
flanged pipe with an 8 in. API flange pattern, simply
place the base gasket on the flanged pipe, line up
bolt holes and place hatch on top of base gasket.
Install nuts and bolts and tighten in a circular
manner. Ensure hatch is fastened securely.
Accessing Spring Capsule Assembly or
Center Assembly
!
Springs are energy storage devices and
are dangerous if handled improperly.
Always use appropriate safety
equipment including safety glasses or
shields anytime you are working with a
spring-loaded hatch.
WARNING
Model ES-660-HF
There are times when you may need to remove the
spring capsule assembly (e.g. to change the pressure
setting of the hatch) or the center assembly (e.g. to
change the vacuum setting or to replace gaskets)
from the Model ES-660-HF hatch. Remove the
spring capsule assembly and the center assembly by
following a few simple steps.
Figure 3. Side View of Model ES-660-HF
The arrow is pointing to the spring capsule assembly
that houses the pressure spring. The center assembly
is not shown in this view, but is located under
the hood.
Figure 4. View of Spring Capsule Assembly Screws
1. Loosen the four (4) bolts that hold the spring
capsule assembly to the lid. The bolts can be
loosened approximately 1/8 in. or enough to allow
rotation of the spring capsule assembly in the
machined slots. It is not necessary to remove the
bolts completely, as the spring capsule assembly
is designed with slots to allow removal without
having to remove the bolts.
3
Advertisement
