Pressure Vessels Selection Guide

Need help picking out a pressure vessel? Visit our new Pressure Vessels Selection Guide.

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Parr Instrument Company 211 Fifty Third Street
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Series 4601-4622 General Purpose Vessels, 1 & 2 L


Series 4600-4620 Pressure Vessel Specifications
Shaded bar indicates specifications that change within series.
General Purpose Vessels
Model Number 4601
Sizes, mL 1000 2000
Maximum Pressure (MAWP) 1900 psi (130 bar)
Maximum Temperature
with FKM O-Ring 225 °C
with PTFE – Flat Gasket 350 °C
Vessel Dimensions
Inside Diameter, inches 4.0
High Pressure Vessels
Model Number 4601HP
Sizes, mL 970 1900
Maximum Temperature / Maximum Pressure (MAWP)
with PTFE – Flat Gasket 350 °C / 2900 psi (200 bar)
with PTFE – Flat Gasket 300 °C / 3000 psi (200 bar)
Vessel Dimensions
Inside Diameter, inches 3.75
Common to these General Purpose and High Pressure Models
Closure Split-Ring (No Cap Screws*) or Split-ring (6 Cap Screws)
Head Style
Opening 1/8″ NPT w/plug VGR** & Thermowell 1/8″ NPT w/plug VGR** & Thermowell
Thermowell No No Yes No No Yes
Mounting Bench Top with Moveable or Fixed Head Mounting
Maximum Head Openings 6-10
*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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