Low Temperature Cryogenic Globe Valve With Wheel Handle
Data Of Cryogenic Globe Valve
| SPECIFICATIONS FOR CRYOGENIC GLOBE VALVES |
| Name | Low Temperature Cryogenic Customize Class Customize Globe Valve
With Wheel Handle |
| Key word1 | Globe Valve With Wheel Handle |
| Key word2 | Low Temperature Cryogenic Globe Valve |
| Withstand temperature | -196 °C- +80°C |
| Disc seal | PCTFE |
| Cover | SS304/316 |
| Connection way | welding |
| Medium | LNG/LO2/LN2/LARETC |
Introduction Of Cryogenic Globe Valve
The low-temperature shut-off valve has an elongated bonnet
structure with sufficient air column length to ensure that the
temperature near the packing seal of the valve stem is not lower
than 0°C, that is, after the low-temperature medium passes through
the elongated bonnet, the temperature gradually increases to the
required position at the packing Safe temperature to ensure the
reliability, safety and integrity of the valve packing seal.The
low-temperature long-axis stop valve is used for the liquid outlet
and liquid inlet of the low-temperature storage tank. Because the
temperature of the medium in the low-temperature storage tank is
extremely low, the temperature is easily transmitted to the top of
the handle in a short time. Large parts of the pipeline adopt
low-temperature long-axis globe valve.The opening and closing parts
of the shut-off valve are plug-shaped flaps. The upper surface of
the seal is flat or conical, and the flap moves linearly along the
center line of the valve seat; the opening or closing stroke of the
stem of the globe valve is relatively short and has a very reliable
The cutting action makes it suitable for cutting or adjusting the
medium and throttling.The shut-off valve is a force-sealed valve,
so when the valve is closed, pressure must be applied to the
clapper to force the sealing surface to not leak. After the
appearance of the self-sealing valve, the medium flow direction of
the shut-off valve is changed into the valve cavity from above the
valve flap. At this time, under the action of the medium pressure,
the force of closing the valve is small, while the force of opening
the valve is large, the diameter of the valve stem can be
corresponding At the same time, under the action of the medium,
this type of valve is also tighter.
Features Of Cryogenic Globe Valve
①Simple structure, convenient for manufacturing and maintenance;
②Small working schedule and short opening and closing time;
③Good sealing performance, low friction between sealing surfaces,
and long service life.
Oeder Process
The user provides the parameters of the valve product that needs to
be consulted and sends it to our company by fax or email. The
required parameters are as follows:a. Valve name and model (such
as: J41F-40P short shaft flange low temperature globe valve)b.
Valve nominal diameter DNc. Valve nominal pressure Mpad. Valve
medium temperature ℃e. Valve connection method (thread, flange,
clip, etc.)f. Valve transmission mode (manual, worm gear, electric,
pneumatic, etc.)g. Valve body material or component material
(plastic, brass, cast iron, carbon steel, stainless steel, etc.)h.
Valve design standards (national standard GB, American standard
ANSI, German standard DIN, Japanese JIS, etc.)i. Valve Kv/Cv value
(this item is for regulating valve series)j. Other unlisted
parameters that the user feels necessary
Our company selects the corresponding valve products according to
the parameters provided by the user, and reports the best price and
delivery cycle
Valve Installation
Before installation, check whether the product model, number and
specifications are consistent, and check whether the parts of the
machine are damaged or loose.
Before installation, the pipeline should be cleaned, and there
should be enough straight pipe sections at the valve inlet and
equipped with filters. The flange connection of the valve body and
the pipeline should pay attention to the coaxiality.
Before installing the valve, the pipeline should be thoroughly
cleaned.
The installation site should take into account the safety of
personnel equipment, which is not only easy to operate, but also
conducive to disassembly and maintenance.
The valve should be installed upright on the horizontal pipeline,
and it can be installed obliquely as a last resort. Try to avoid
horizontal installation. Where the valve is heavy or vibrates, use
a support frame.
The flow direction of the medium should be consistent with the
arrow on the valve body. The gas source should be dry and free of
oil.
Valve Maintenance
(1) Cleaning the valve:
For cleaning general media, as long as it is cleaned with water.
But to clean the media that is harmful to health, we must first
understand its nature, and then choose the corresponding cleaning
method.
(2) Disassembly of the valve: Derust the exposed surface parts
first, but before descaling, protect the machined surfaces of the
precision parts such as the valve seat, valve core, stem and push
rod. Use special tools when disassembling the valve seat.
(3) Valve seat: There are small rust spots and wear on the sealing
surface, which can be carried out by mechanical processing. If the
damage is serious, it must be replaced with a new one. But no
matter the repaired or replaced hard sealing surface, it must be
ground.
(4) Valve stem: The surface is damaged and can only be replaced
with a new one.
(5) Damage to the push rod, guide and sealing surface: the
counteracting actuator must be replaced with a new one, and the
positive acting actuator can be used after proper repair.
(6) Compression spring: If there are cracks and other defects that
affect the strength, they must be replaced with new ones.
(7) Fragile parts: packings, sealing gaskets and O-rings are
replaced with new ones every time they are repaired. The valve core
and diaphragm must be checked for signs of cracks, aging and
corrosion that may occur in the future. Based on the results of the
inspection, it is decided whether to replace them, but the
diaphragm is generally used for a maximum of 2-3 years.
(8) The valve assembly should be centered, the bolts should be
tightened diagonally, and the sliding part should be lubricated.
After assembly, it should be debugged according to the product
factory test items and methods, and during this period, the packing
compression force and the spool closing position can be adjusted
accurately.
