Groth 7688 - Manual (Page 2)

2
Table of Contents
Section Page
Introduction 2
Certification 2
Integrated temperature sensors 2
Design & Function 3
Installation 3
Maintenance 4
Model Identification 6
Product Limited Warranty 6
Tables
Bolt torque 4 & 5
MESG tables 6
Attachments
ATEX Declaration of Conformity
Cert. # IBExU12ATEX2016 X
Drawings SCH-7688-01, SCH-7688-
02, and SCH-7688-03
INTRODUCTION
This manual is intended to provide
recommended procedures and practices for
installation, operation and maintenance of the
Groth Model 7688 in line deflagration flame
arrester. Any standard procedures and practices
developed for a specific plant or process should
supersede this manual. Although this manual
cannot
cover all possible contingencies,
following these guidelines will provide safe,
reliable deflagration flame arrester service.
The arrester shall be treated as a safety device
and must be maintained by a knowledgeable
repair technician. Carefully read and understand
this manual before installing or servicing this
product.
For information not contained in this manual,
please contact:
Groth Corporation
13650 North Promenade Blvd.
Stafford, TX 77477
281-295 6800
281-295-6999 Fax
CERTIFICATION
Groth Model 7688 in line deflagration flame
arresters are manufactured in compliance with
the ATEX 94/4/EC, as confirmed by Certificate
IBExU12ATEX2016 X. This certification covers
the following sizes, materials and limits for use.
Sizes included are all those shown on drawings
SCH-7688-01, SCH-7688-02, and SCH-7688-
03. Materials included are all materials that
satisfy the strength and pressure ratings
specified on these drawings.
These arresters are suitable for in line
deflagrations and short time burning. Run up
length from source of ignition is:
Connection
Size
(mm)
Run Up
Length/Diameter
p
TB
/ p
O
2”
(50mm)
50 23.2 PSIA
(1.60 Bar)
3”
(80mm)
50 23.2 PSIA
(1.60 Bar)
4””
(100mm)
50 17.4 PSIA
(1.20 Bar)
6”
(150mm)
50 17.4 PSIA
(1.20 Bar)
8”
(200mm)
50 17.4 PSIA
(1.20 Bar)
10”
(250mm)
50 17.4 PSIA
(1.20 Bar)
12”
(300mm)
50 17.4 PSIA
(1.20 Bar)
Explosion Gas Group IIA
MESG of vapor mixture ≥ 0.036” [0.90 mm]
Operating Temperature –4
o
F to 140
o
F [-20
o
C to 60
o
C]