Pressure Vessels Selection Guide

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Series 4661-4666 General Purpose Vessels, 1-2 Gallon


Series 4660 Pressure Vessel Specifications
Shaded bar indicates specifications that change within series.
Model Number 4661(FH)(Q)* 4662(FH)(Q)* 4665(FH)(Q)* 4666(FH)(Q)*
Sizes, Gallon (Liter) 1 (3.75) 2 (7.5)
Maximum Pressure 1900 psi (130 bar)
Maximum Temperature
with FKM O-Ring 225 °C
with PTFE Flat Gasket 350 °C
Closure Split-Ring (10 Cap Screws)
Gasket Flat – PTFE
Vessel Dimensions
Inside Diameter, inches 6.0
Inside Depth, inches 8.6 17.2
Weight of Vessel, pounds 75 80 85 90
Head Style
Opening Rupture Disc Only VGR** Rupture Disc Only VGR**
Thermowell No Yes No Yes
Mounting Moveable Floor Stand or Fixed Head Stand
Maximum Head Openings 12
*Add the following suffixes to these model numbers to specify vessels with the described features:
FH Fixed Head design
Q O-Ring seal and a split ring pair without cap screws
**VGR stands for Valve, Gage, and Rupture Disc
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