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P a r r I n s t r u m e n t C o m p a n y
Series 4791- 4793 GP and HP/HT Vessels: 25 - 100 mL
Model 4791, 25 mL General Purpose
Vessel
4791 Cross Section
(Showing Flat Gasket and
O-ring Closure)
4793HP/HT, 100 mL Fixed Head Vessel
Series 4791 - 4793 Pressure Vessel Specifications
Shaded bar indicates specifications that change within series.
General Purpose Vessels
Model Number
4791*
4792*
4793*
Sizes, mL
25
50
100
Maximum Pressure (MAWP)
3000 psi (200 bar)
Maximum Temperature
with FKM O-Ring
225 °C
with FFKM O-Ring
275 °C
with PTFE - Flat Gasket
350 °C
Valve Connections
3 – 1/8" NPT Male
Pressure Gage Size / Range
3.5 inches / 0-3000 psi (200 bar)
Heater
Catalog Number
A2236HC
A2236HC
A2237HC
Heater Power Watts
400
400
350
Heater Style
Clamp-on
Clamp-on
Mantle
High Temperature / High Pressure Vessels
Model Number
4791HP/HT*
4792HP/HT*
4793HP/HT*
Sizes, mL
25
50
100
Maximum Pressure (MAWP)
5000 psi (350 bar)
Maximum Temperature
with Grafoil - Flat Gasket
500 °C
Valve Connections
2 – 1/4” NPT (F)
Pressure Gage Size / Range
3.5 inches / 0-5000 psi (350 bar)
Heater (Ceramic Fiber)
Model
4991
Heater Power, Watts
700
Common to these General Purpose and High Temperature / High Pressure Models
Vessel Style
Moveable, or Fixed Head on Bench Top
Closure
Split-Ring (6 Cap Screws)
Temperature Measurement
Fixed Thermocouple
Additional Fittings
Dip Tube and Rupture Disc
Vessel Dimensions
Inside Diameter, inches
1.0
1.3
1.3
Inside Depth, inches
2.0
2.3
4.6
Weight of Vessel, pounds
7
7
8
* Add the following suffixes to these model numbers to specify vessels with the described features:
No suffix: Moveable Head
Q: Add the suffix Q to specify vessels with an O-Ring seal and a split ring pair without cap screws
FH: Add the suffix FH to specify a Fixed Head design.
General Purpose 4790 Series Vessels come with dip tube, three valves, gage, rup-
ture disc, and thermocouple. The HP/HT versions include two valves as standard.
