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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 4703-4714 General Purpose Pressure Vessels: 22 & 45 mL
T
hese are the smallest of the Parr General
Purpose Pressure Vessels. They have a 1
inch inside diameter and are offered in two dif-
ferent lengths with volumes of 22 and 45 mL.
These vessels have a flat PTFE or flexible
graphite gasket that is sealed with a screw cap.
Special wrenches and bench sockets are offered
for tightening these closures. The screw caps
and bodies are made of alloy steel for use at
temperatures to 300 °C. The maximum working
pressure is 1700 psi (115 bar). The standard
material of construction for these small, inex-
pensive vessels is Type 316 Stainless Steel,
but they are also available in all of the current
materials of construction Parr provides.
There is room for a single opening on the
head of these vessels. This is generally an “A”
socket which will accept a 4316 Gage Block
Assembly.
These heads can also be furnished with 1/8"
NPT, 1/4" NPT, or a rupture disc assembly.
These vessels are normally heated in ovens,
baths, or similar general purpose heating
devices. Special heaters for these vessels are
not available from Parr.
Series 4701-4714 Pressure Vessel Specifications
Shaded bar indicates specifications that change within series.
Model Number
4703
4704
4713
4714
Sizes, mL
22
45
Maximum Pressure (MAWP)
1700 psi (115 bar)
Maximum Temperature
300 °C
300 °C
Closure
Screw Cap-Steel
Gasket
Flat - PTFE
Vessel Dimensions
Inside Diameter, inches
1.0
Inside Depth, inches
1.6
3.8
Weight of Vessel, pounds
1
2
Head Style
Opening*
1/8" NPT w/plug “A” Socket
1/8" NPT w/plug “A” Socket
Thermowell
Not Available
Heater
Not Available
Maximum Head Openings
1
Recommended Gage Block
NA
4316
NA
4316
Recommended Wrench
21AC4
Recommended Bench Socket
A22AC3
*Note: Alternative heads with 1/4" NPT or Rupture Disc Assembly are available upon request.
Model 4714, 45 mL Vessel, with 4316
Gage Block Assembly.
Model 4704, 22 mL Vessel shown with
Needle Valve.
4714 Cross Section
