Models 4000 and 4100
2
Specifications
The Specifications section lists the specifications for the Models 4000 and 4100 free vents. The following
information is stamped on the name plate attached to the free vent: Model, Connection Size, Material, Flange
Type and other options.
available Constructions
See Figure 2
Flange rating
CL150
Flange Sizes
2 to 12 in. / 50 to 300 mm
Construction Materials
Aluminum, Carbon steel, 304 Stainless steel,
316 Stainless steel and Special
(1)
Product Description
Models 4000 and 4100 free vents are used on tanks
containing liquids with low volatility where evaporative
losses are not of particular concern. Free vents protect
the tank from positive or negative overpressure by
providing an open venting port.
installation
!
Warning
Make certain line is free of hazardous
vapors before installing or servicing
the product. always observe safe
work practices.
1.
Install the free vent on a level mating flange with
an appropriate gasket, bolts and nuts.
2.
Insert the bolts into the base bolt holes through the
gasket and mounting flange.
3.
Tighten the nuts evenly.
Maintenance
Models 4000 and 4100 free vents require
minimal maintenance.
1. Visually inspect the vent screen. Ensure that the
vent screen is open and free of obstructions.
2. Clean the screen or vent hood periodically to remove
residue or dust collected on the screen or vent.
3.
Clean the hood if necessary. Remove the wing
nuts to remove the hood.
4.
Replace the hood after cleaning and reattach
with the existing wing nuts.
5.
After making any adjustment and maintenance on
the free vent, use new flange gasket.
Figure 2.
Models 4000 and 4100 Free Vents Model Numbering System
1. Contact your local Sales Office for the available special materials.
Series
40 = 4000
41 = 4100
Connection Size
2 in. / 50 mm
3 in. / 80 mm
4 in. / 100 mm
6 in. / 150 mm
8 in. / 200 mm
10 in. / 250 mm
12 in. / 300 mm
Material
A = Aluminum
C = Carbon steel
4 = 304 Stainless steel
6 = 316 Stainless steel
X = Special
Flange Type
F = Flat Face
R = Raised Face
Options
1 = Protective Coating
2 = Special Features
