Page 8 - C:\Users\nancy.chavez\Documents\Flip PDF Professional\Polar_service_center_website_catalog\

DOT 407 Combination Pressure/Vacuum Relief Vent

FUNCTION

This spring-loaded, dual-acting pressure and vacuum relief
vent provides much needed protection from dangerous
build-up of positive and negative forces, known as pressure
and vacuum, on tank trailers transporting hazardous chemicals.
Each vent is carefully assembled and tested to each customers’
exact specifications. Careful attention was paid to the design
around the idea of a minimization of repair parts and a vent
which could be easily disassembled with simple hand tools.

DISASSEMBly
Our patented design can be disassembled using our
pressure spring “caging” disassembly feature (See page 4).
This feature effectively “traps” the spring and reduces the
internal pressure enough to allow easy separation of the valve
housings. The main wearable parts are exposed, facilitating
cleaning and repair. The vent can be returned to service within
minutes.

MATERIAlS OF CONSTRUCTION

All metallic parts 316L Stainless Steel
O-Ring Teflon® Encapsulated Silicone
Gasket Teflon®

PERFORMANCE SPECIFICATIONS (3” DESIGN)

MAWP TesT floW exPosed
Pressure (sCfH) s urfACe
25 40 383,114 768
25 45 418,367 897
30 45 418,367 897
35 52.5 460,443 1061 8 7 6 5 4 3 2 1

3” DOT 3X407TWV (GA00300) (25# MAWP) and
PERFORMANCE SPECIFICATIONS (4” DESIGN) 4” DOT 407LTWV (GA00400) (25# MAWP)
D D
MAWP TesT floW exPosed Weight: 11 lbs.
Pressure (sCfH) s urfACe
25 40 426,983 930 Installed Height:
25 45 466,115 1083 5 1/4”over the
top of the
30 45 466,115 1083
pipe nipple
35 52.5 484,718 1156 6.7"
C C
VACUUM PERFORMANCE

3,726 SCFH
7.5" O.D.

5
B B

A
UNLESS OTHERWISE SPECIFIED
A THIS IS THE PRIVATE DIMENSIONS ARE IN INCHES
.XXX
.XX
AND CONFIDENTIAL .015 .005 ANGLES
0 30'
PROPERTY OF GIRARD MATERIAL
EQUIPMENT INC. AND SEE BOM 4360 Old Dixie Highway Vero Beach, FL 32967
IS NOT TO BE COPIED FINISH 407T VENT, 25#, 3" NPT
OR REPRODUCED -
DATE
WITHOUT THE WRITTEN DRAWN APPROVALS 9/13/14
RDS
CONSENT OF GIRARD CHECKED gsh 9/22/14 SIZE REV.
EQUIPMENT INC. ESTIMATED WEIGHT SCALE B GA00100 A
11.6 1:1
8 7 6 5 4 3 2 1
Printed copy valid for 168 hours (7 days) from time of printing unless otherwise indicated "CONTROLLED COPY"