INSTALLATION
STORAGE
Handle the Pump carefully in moving it about prior to installation.
If not installed immediately, store it in a dry location and protect
from oil, dust, or moisture. Do not remove the covers from the
suction and discharge flanges until the piping is ready to be bolted
to the Pump. Rotate the Pump shaft periodically to keep the moving
parts coated with lubricant.
LOCATION AND MOUNTING
Place the Pump as close as possible to the cryogenic fluid supply.
Allow room for inspection during operation. Locate the Pump in a
space which is well ventilated. Fasten to a rigid, level foundation,
using the largest possible bolts. The volute assembly may be rotated
to any position in bolt-pattern increments; however, the top
overshot is least subject to vapor locking. Where a separate driver
is used, check the coupling alignment before operating.
PIPING
Lay out the piping in accordance with the Installation
Diagram. Clean the piping thoroughly to remove foreign matter
such as dirt, scale, welding shot, grease, oil, water, or pipe joint
compound before connecting to the Pump. Use only copper, bronze,
stainless-steel, or aluminum pipe fittings; carbon steel is too
brittle at low temperatures.
Piping should be supported in such a manner that no strain is
imposed upon the Pump. Install expansion joints or flexible
metal-hose sections adjacent to the suction and discharge flanges of
the Pump so as not to exceed 50 pounds force or 50 foot-pounds
torque on the Pump casing during installation, cooldown, or
pressurization. Failure to include these expansion provisions will
void the warranty because it will result in distortion of the casing
and possible rubbing damage to the impeller. It is good practice to
secure the Pump to the foundation and then to connect the piping to
the Pump for alignment while the final piping welds are being made
at a point removed from the Pump. In this way, misalignment is taken
up in the welds, not in distortion of the Pump casing.
Use pipe at lease the same size as the Pump suction for installing
the suction line. The suction pipe should slope downward toward the
Pump suction at all points, and should not contain loops in which
gas may be trapped. If the Pump is located above the level of the
liquid, pressure to supply the necessary suction pressure at the
Pump inlet is required, and a gas bleed pipe is necessary at the
high point of the piping.
WARNING:
The Pump is designed to operate with a maximum of 100 psig suction
pressure. A safety pressure relief valve set at 100 psig must be
installed between the Pump and the suction gate valve to relieve the
expanding gas pressure while the Pump is valved off.
Use only gate and globe valves in flow lines.
ELECTRICAL CONNECTIONS
If an electric drive motor is used, connect as shown on the motor
nameplate and according to applicable safety codes. Momentarily
operate (bump) the motor to determine that it operates in the
correct direction; if not, interchange any two of the line leads
(three-phase only).
For
problems or questions with this site contact webmaster@cryomach.com
Web site designed and maintained by •
Infinite Loophole Designs •