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N o n - S t i r r e d P r e s s u r e V e s s e l s
Series 4740 HP/HT Pressure Vessels: 25 & 75 mL
T
hese are the smallest of Parr
High Pressure, High Temperature
vessels. They have a 1 inch inside
diameter and offer volumes of 25 or 75
mL. These vessels are closed with an
alloy steel screw cap which includes
six cap screws to develop the sealing
force on a flat, flexible graphite gasket.
Interchangeable PTFE gaskets are also
available for users who need the high
pressure capabilities provided by these
vessels, but who do not need to operate
above 350 °C. Maximum pressure drops
quickly at temperatures above 350 °C to
a rating of 1850 psi (125 bar) at 540 °C.
These vessels are available in all of the
standard materials currently offered by
Parr, although some of these materials
will limit the maximum pressures and
temperatures available.
Only one head opening is available
for these vessels. It is designed to accept
the 4316 Gage Block Assembly which can
be furnished with or without a thermo-
couple. Parr now offers the 4921 Bench
Top Ceramic Fiber heater for use with the
75 mL, 4740 vessel only.
Series 4740 Pressure Vessel Specifications
Shaded bar indicates specifications that change within series.
Model Number
4740
4742
Sizes, mL
75
25
Maximum Pressure (MAWP) @ 350 °C
8500 psi (585 bar)
Maximum Temperature
540 °C
Max. Pressure at Max. Temp., psi (bar)
1850 (125)
Closure
Screw Cap (6 Cap Screws)
Gasket
Flat - Flexible Graphite
Vessel Dimensions
Inside Diameter, inches
1.0
Inside Depth, inches
5.6
1.7
Weight of Vessel, pounds
5
4
Head Style
Opening
“A” Socket
Thermowell
No
Heater (Ceramic Fiber)
Model
4921
N/A
Heater Power, Watts
700
N/A
Maximum Head Openings
1
Recommended Gage Block
4316
Model 4740, 75 mL Vessel, with
Ceramic Fiber Heater.
4740 Cross Section
Model 4740, 75 mL Vessel, with
Gage Block Assembly.
