The Manual Pressure Control Pack provides a means of setting and fine tuning
gas pressure, and vacuum, in a closed system. Typically, a Manual Pressure
Control Pack is used to control pressure to both a pressure standard, which
may be a gas piston (deadweight) gauge or a digital pressure indicator, and
the device under test. The Pressure
Control Pack allows the operator to introduce the gas pressure from a source,
such as a nitrogen bottle or air supply, using a cutoff and metering valve. Once
the pressure is near the desired set-point, the operator can use the Precise
Pressure Adjustor which is integrated
into the Pressure Control Pack to fine tune the pressure to the actual set-point.
The Precise Pressure Adjustor has a minimum sensitivity of 0.00025 psi. The sensitivity
improves as system volume increases.
In deadweight
gauge applications, the Manual Pressure Control Pack is designed
to conveniently generate pressures in the gauge,
absolute and true negative gauge (vacuum) mode of operation. Prior
to this design, significant changes were required to convert from
gauge to negative gauge mode of operation. Now, with the simple
turn of one valve, the Manual Pressure Control Pack is configured
to
allow negative gauge mode calibrations to be performed without
any changes to the system.
Two Manual Pressure Control Packs are available: the 2465-800
which is can be used to adjust pressures from absolute up to 1000
psi and the 2470-800 for absolute pressure to 3000 psi. Both
models provide a convenient reference gauge to provide a rough
indication of the system pressure.
All pneumatic connections (1/4” NPT female) are located on
the
back of the unit allowing a compact and neat installation. The
user
need only connect a gas pressure source and if vacuum measurements
are required, a vacuum pump.
Precise Pressure
Adjustors
The Series 3800 Precise Pressure
Adjustors provide the ability to
fine tune the pressure in a closed system to a minimum of 0.00025
psi. These pressure adjustors are typically used to complement
existing equipment that is capable of roughly setting the pressure,
and then using the Series 3800 to finely tune the pressure.
The system pressure is applied to two large chambers separated
by
an adjustable piston. A valve located on the pressure adjustor
is
closed separating the two chambers, and adjustment is achieved
by
rotating the large knob which applies micrometer precise movement
to the piston. By moving the piston, the volume of the test system
changes, therefore changing the pressure by a very small amount
per turn. When the next pressure step is required, the operator
simply opens the valve on the pressure adjustor and using existing
equipment roughs into the next point and then repeats the process
of closing the valve and setting the precise pressure.
Three different Precise Pressure Adjustors are available with
pressure ranges to 1000 psi, 3000 psi and 10,000 psi. An optional
mounting bracket is available for mounting the Precise Pressure
Adjustor to a table top.
Vacuum Pumps
Ruska also provides vacuum pumps
as an accessory to our
products. Two models are offered, one with a capacity of 139 liters/minute
and another with a capacity of 69 liters/minute. Both pumps
include an auto-vent valve to vent the vacuum on power loss and
prevent the oil from contaminating the instruments attached to
the
pump, a back stream filter to prevent molecular migration of oil
during
normal operation, and a muffler for quiet operation. A 1/4 in.
NPT
female fitting is provided in addition to a KF16 vacuum connection.
Vacuum Gauge
The Model 99700 Vacuum Gauge is
used to measure the vacuum in
a contained system. It is typically used to allow zeroing of the
Model 7010 Digital Pressure Controller, or to monitor the vacuum
in
the bell jar of the Model 2465 Gas Piston Gauge when not using
the
Model 2455 Deadweight Gauge Monitor or Autofloat configurations,
which have their own built-in vacuum sensing systems.
Hand Pumps
Ruska hand operated pumps are positive
displacement pumps that
feature ease-of-use and long life. There are two basic models
available, each with a variety of configurations to meet the customers
specific needs. The Model 2426 provides precise pressure generation
and adjustment to 15,000 psi whereas the Model 2427 is capable
of
generating pressures up to 40,000 psi.
Both the Model 2426 and 2427 can be provided in a variety of configurations.
For example, the Model 2426 (pictured left) includes not only the
pump, but also a dial indicating reference gauge, a 100 cc reservoir
to
recharge the pump when fluid is lost or compressed, and three high
pressure cutoff valves. Please refer to ordering information on
the back
page for a complete description of the various configurations available.
Additionally, the Model 2426 Hand Pump can be used in a high
pressure gas system for fine tuning the system pressure.
Connector Blocks
Ruska Connector Blocks provide
a convenient means of connecting
the device under test into the system. The Model 2405 is rated
to
15,000 psi and is available in a variety of configurations along
with
models for hydraulic or gas service. The Model 2424 is available
for
high pressure systems to 40,000 psi.
Manometers
Open tube reference manometers
in hydraulic systems provide a
point in the system which can be opened to atmosphere, thereby
eliminating any unknown pressure bias and providing a reproducible
reference level for the device under test. They are commonly used
in
conjunction with the Ruska Model 2413 Differential Pressure Null
Indicator (see separate brochure), where a multimedia calibration
system is required. The Model 2409 is available for system pressures
up to 15,000 psi. Otherwise, the Model 2421 should be used
which is rated for system pressures to 40,000 psi.
Filter Traps
A filter trap is recommended in
hydraulic systems to isolate the
device under test from the calibrator, and therefore preventing
possible contaminants in the device under test from damaging a
precision calibrator, such as a deadweight gauge. The Model 2414
is
available for pressures to 15,000 psi and the Model 2436 Filter
Trap
is available for high pressure systems up to 40,000 psi.
Reservoirs
The 1500 cc capacity of the Model
2419 Reservoir provides a
convenient storage of hydraulic fluid that must be added to the
system to replace fluid lost during the calibration process. The
standard reservoir has a Lucite tank with a stainless steel bottom.
Other reservoirs are available depending on the fluid type.
Pressure Intensifier
and Monitor
The Model 2440 Pressure Intensifier
is typically used in oil to gas
deadweight gauge systems and provides a means to boost standard
air or nitrogen bottle pressure to as high as 15,000 psi. The unit
is
designed for mounting under the bench top of a multimedia
(typically oil to gas) deadweight gauge system utilizing the Model
2413 Differential Pressure Null Indicator. The non-lubricated
compression cylinder eliminates contamination and provides a small
volume of high pressure gas suitable for most requirements. The
simplicity of operation and long life make the Model 2440 an
excellent choice for oil to high pressure gas calibration systems.
The Model 2444 Pressure Monitor is recommended for use with the
Pressure Intensifier to provide the operator with a rough indication
of the output pressure. The Pressure Monitor incorporates a dial
indicating gauge to 15,000 psi and a vent valve for returning to
atmosphere or for a downward calibration run.
