6
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
141
P a r r I n s t r u m e n t C o m p a n y
1 - 8 0 0 - 8 7 2 - 7 7 2 0
Gage Block Assemblies
Coned Pressure Fittings
Type
A
B
Tube Size
1/4"
3/8"
Thread (D)
9/16 -18
3/4 -16
Bore (E)
3/32"
1/8"
Nut No.
35HC
326HC
Sleeve No.
40HC
366HC
Coned Pressure Fittings
P
arr gage block assemblies
combine the function of an:
• Inlet / Outlet Valve
• Pressure Gage
• Safety Rupture Disc
into a compact assembly which
can be attached to the head of
any small vessel with limited
head space using a connect-
ing tube. There is a threaded
socket in the block for a gas
connection with a pressure
hose or tubing using a type
“A” coned pressure fitting.
Coned fittings are also used
on the thick-walled tube which
connects the block to the pres-
sure vessel. The valve in this
assembly controls the gas flow
into the vessel and the gage
shows the pressure in the ves-
sel when the valve is closed.
A rupture disc with a burst
rating matched to the gage is
installed in the block.
Two Sizes
These gage block assem-
blies are made in two styles
which differ only in the size of
the pressure gage and the size
of the tube connection to the
pressure vessel. The smaller
4316 Gage Block Assembly is
usually furnished with a 3-1/2
inch diameter pressure gage
and includes a 3 inch long
connecting tube with type “A”
coned fitting. This assembly is
normally installed on pressure
vessels up to 600 mL.
The 4317 Gage Block Assem-
bly has a 4-1/2 inch diameter
gage and type “B” coned fitting
on a 3 inch long connecting
tube. This assembly is normally
installed on vessels of 1000 mL
and larger.
The gage block, connecting
tube and pressure gage on
all of these assemblies are
normally made of type 316
Stainless Steel, but they can
also be made of Alloy 400 on
special order. Longer tubes can
be furnished on special order.
Ordering Information
Part No.
Description
4316
with Type “A” Connector
4317
with Type “B” Connector
4316 Gage
Block
Assembly
4317 Gage
Block
Assembly
Gages for Parr Pressure Vessels
Pressure Range 4-1/2" Diameter
3-1/2" Diameter
psi
bar
Gage Number
Gage Number
0-100
0-7
56HCPA
593HCP1AD
0-200
0-14 56HCPB
593HCP2AD
0-600
0-40 56HCPC
593HCP6AD
0-1000 0-70 56HCPD
593HCPD
0-2000 0-140 56HCPF
593HCPF
0-3000 0-210 56HCPG
593HCPG
0-5000 0-350 56HCPH
593HCP50AD
0-7500 0-517 56HCP75AD
NA
0-10000 0-700 56HCPK
NA
When ordering, specify the catalog number,
pressure gage diameter and range.
Available Gages
Any of the gages shown in this table can be
installed on these gage block assemblies.
G
age Blocks, pressure
hoses and other parts that
are frequently removed from
a pressure vessel are attached
with a coned, socket type
connector. The male segment
of a coned fitting consists of a
sleeve with a left-hand thread
screwed onto a thick-walled
tube, plus a compression nut
to complete the assembly.
When screwed into a mating
socket these parts produce a
rigid joint which will remain
tight over a wide temperature
and pressure range, yet the
joint can be made and broken
repeatedly without destroying
the sealing faces. No gasket
or sealing tape is required.
These fittings have the added
advantage of behaving like
union fitting, allowing the gage
block, connecting tube or hose
to remain stationary while the
nut is tightened.
Parr coned pressure fittings
are made in two sizes, identi-
fied as types “A” and “B”, for
1/4 inch and 3/8 inch tubing,
respectively.
Tubing
Nut
Sleeve
D
E
