Model number identification, Product limited warranty – Groth 7658A User Manual
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The table below is a partial list of vapors for which the MESG has been measured and found to be greater than or equal to 
0.036" [0.92 mm]. If your system contains a gas not listed in the table, please consult the factory. 
Chemical Compound
MESG*
(mm)
MESG
(Inches)
acetone
1.02
0.040
acetonitrile
1.50
0.059
ammonia
3.17
0.125
amyl acetate
0.99
0.039
butane
0.98
0.039
butyl acetate
1.02
0.040
butyl alcohol
0.94
0.037
carbon monoxide
0.94
0.037
cyclohexane
0.94
0.037
decane
1.02
0.040
ethane
0.91
0.036
ethyl acetate
0.99
0.039
ethyl nitrite
0.96
0.038
heptane
0.91
0.036
hexane
0.93
0.037
isobutyl alcohol
0.96
0.038
Chemical Compound
MESG*
(mm)
MESG
(Inches)
isooctane
1.04
0.041
isopentane
0.98
0.039
isopropyl alcohol
0.99
0.039
methane
1.14
0.045
methyl acetate
0.99
0.039
methyl alcohol
0.92
0.036
methyl ethyl ketone
0.92
0.036
methyl isobutyl ketone
0.98
0.039
octane
0.94
0.037
pentane
0.93
0.037
propane
0.92
0.036
propyl acetate
1.04
0.041
propylene
0.91
0.036
vinyl acetate
0.94
0.037
vinyl chloride
0.99
0.039
*Corrected MESG (mm), 100KpA, 20°C
MODEL NUMBER IDENTIFICATION
MODEL#
7658A
NOMINAL
SIZE
02"
Thru
6"
ELEMENT
SIZE
05"
Thru
12"
MATERIAL 
  
Flame Element Winding
Body Material
3 = Carbon Steel
5 = 316 SS
Z = Special
OPTIONS 
  
O = No Options
Z = Special
F = 150# A.N.S.I.
Flange
Z = Special Flanges
NOTES
Include model number when ordering. 
For special options, consult factory 
EXAMPLE: 7658A - 02 - 05 - 35 - FO
Indicates a 2" Model 7658A with 5" Element Size, Carbon Steel Body, 316 SS Flame Winding, 150# Flanged Outlet, and no options
PRODUCT LIMITED WARRANTY
A. Seller warrants that products which are manufactured by Seller, are
manufactured in accordance with published specifications and free 
from defects in materials and/or workmanship for a period of (12) 
twelve months. Seller, at its option, will repair or replace any 
products returned intact to the factory, transportation charges 
prepaid, which Seller, upon inspection, shall determine to be 
defective in material and/or workmanship. The foregoing shall 
constitute the sole remedy for any breach of Seller's warranty. 
B. THERE ARE NO UNDERSTANDINGS, AGREEMENTS,
REPRESENTATIONS, OR WARRANTIES, EXPRESS OR 
IMPLIED, (INCLUDING MERCHANTABILITY OR FITNESS FOR 
A PARTICULAR PURPOSE REGARDING PRODUCTS ) UNLESS 
SPECIFIED IN THE SALES CONTRACT. THIS CONTRACT 
STATES THE ENTIRE OBLIGATION OF SELLER. 
Seller makes no warranties, either express or implied, except as 
provided herein, including without limitation thereof, warranties as 
to marketability, merchantability, for a particular purpose or use, or 
against infringement of any patent of products. In no event shall 
Seller be liable for any direct, incidental or consequential damages of 
any nature, or losses or expenses resulting from any defective new 
product or the use of any such product, including any damages for 
loss of time, inconvenience, or loss of use of any such product. 
C. The original Manufacturer shall be solely responsible for the design,
development, supply, production, and performance of its products 
hereunder, and the protection of its trade name or names, if any. It 
assumes no responsibility, for products modified or changed in any 
way by its agent or customer. Any such modifications or changes to 
products sold by Seller hereunder shall make the product limited 
warranty null and void. 
D. The Manufacturer shall be under no obligation to manufacture, sell,
or supply, or to continue to manufacture, sell or supply any of the 
Products. 
