Liquefied gas valve, also called sectional door, is the most widely used type of valve. Its popularity is due to the fact that the friction between the sealing surfaces during opening and closing is small, more durable, the opening height is not large, and manufacturing is easy. Easy to maintain, not only for medium and low pressure, but also for high pressure. The following small series introduces the use of liquefied gas valves and the main characteristics of liquefied gas. Liquefied gas valve installation 1. The inner cavity of the liquefied gas valve should be cleaned before installation and the defects caused during transportation should be removed; 2. Liquefied gas valve installation should maintain the horizontal state of the butterfly valve drive shaft and the vertical position of the piston valve; 3, before the use of liquefied gas valve to deal with the transmission device to debug, keep the transmission device functions intact, limit travel and over torque protection and control; 4. Lubricate all the lubrication parts of the liquefied gas valve transmission before commissioning. 5. Before starting the electric device, read carefully the manual of the electric device of the liquefied gas valve provided. Liquefied gas valve use method 1. The special valve cavity must be cleaned before installing the valve, and the defects generated during transportation should be clearly understood to avoid the influence of these defects on the normal operation of the valve. 2. Install the liquefied gas valve in a place that is easy to maintain and install it on a horizontal pipe. 3. When the liquefied gas valve is installed, first open the channel pipe next to the rice to clear the condensate and other mixture in the pipe. 4. Liquefied gas valve is a kind of sealed valve, so when we close the valve, we must take a certain pressure on the valve flap, and apply pressure to force the seal without letting it leak. When the gas enters the valve, the force of friction between the valve stem and the gas and the thrust generated by the medium entering the valve is the resistance to overcome when the gas enters, so the diameter of the valve should be large enough. The main characteristics of liquefied gas 1, flammable and explosive. There is a greater risk of fire and explosion accidents than oils and natural gas such as gasoline. Liquefied gas reaches a certain concentration in the air. Even in a cold area, small sparks emitted when an electrostatic or metal impact is encountered can rapidly cause combustion. If the concentration of liquefied gas plus air is 2-10%, it will cause an explosion. 2. The ratio of gas to liquid volume is large and volatile: under normal temperature and pressure, liquid liquefied gas is rapidly vaporized into 250--350 volumes of liquefied gas. 3, the proportion of liquid is lighter than water. Like oil, it floats on the water, which is about half as much as water. 4. The proportion of gaseous matter is heavier than air, which is approximately 1.5 to 12 times the specific gravity of air. Therefore, the leakage of liquefied petroleum gas easily deposits in low-lying areas, causing burning and explosion accidents. 5, large volume expansion coefficient. The volume expansion coefficient of liquefied petroleum gas is approximately 10 to 16 times the volumetric expansion coefficient of water at the same temperature. As the temperature rises, the liquid volume will continue to expand, the gaseous pressure will also increase, and the temperature will increase by 1 degree Celsius per volume. Expansion 0.3 to 0.4%, pressure increase 0.2 ~ 0.3MPa. 6, low boiling point. The general boiling point is below 0°C. In China, especially in the south, even in the coldest temperature conditions in winter, it can be naturally gasified. 7, the flash point is low. Below 28°C, the minimum combustion temperature for the formation of a volatile gas mixture is called the flash point, and flash point-prone combustion only occurs instantaneously with flashes or flashes. The flash point is a precursor to fire. 8. Corrosiveness: The corrosiveness in liquefied gas is mainly a small amount of sulphide. It has a slight amount of corrosiveness to steel equipment and has a melting effect on rubber. 9, odor: liquefied gas no special odor, in order to easily detect the leak, in the liquefied petroleum gas add ethane thiol and other additives odor. 10. Poisoning and suffocating: LPG has low toxicity. When the concentration of liquefied petroleum gas in the air exceeds 1%, it will cause people to vomit and feel headache; when they reach 10%, they will be anesthetized in two minutes. When the human body inhales a high concentration of liquefied petroleum gas, suffocation death occurs. Editor's summary: The use of liquefied gas valves and the main characteristics of liquefied gas are introduced here, and we hope to help everyone. If you want to know more related information, you can pay attention to this website information. Curtain installation method
OPT Diamond Cutting Tools Co., Ltd are a professional manufacture in producing Cutter Taps ,Thread Forming Taps,pipe taps etc . We
offer a complete range of taps in carbide, CPM and HSS-E.For
Carbide Taps , we provied regular stock, and we also provide customization for
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Carbide
taps is used to cut a screw thread in material with a pilot hole, threading
is a process of both external and internal machining of threads into a
workpiece. A number of angles and measurements defines the thread of
the screws and bolts. All are of importance:
The lead
is the distance through which a screw advances with one turn in the direction
of the shaft. There are single lead threads and multiple lead threads. Multiple
lead threads are able to feed faster with fewer revolutions.
The pitch
is the distance between the corresponding threads in the axial direction.
The
effective diameter is the midway point between the crest and root. In other
words, the point where the internal thread and external thread overlap when
screws are meshed together. The effective diameter is, along with pitch, one of
the most important dimensions in threads.
According to the application, there are several kinds of
taps: Machine and hand taps, spiral flute taps, spiral pointed taps, thread
forming taps, and Pipe taps and Thread Milling Cutter.
1. Machine and hand taps
The very standard tap, mostly are the Straight flute tap.
Typically, tap is constituted by a working portion and a shank portion. The
working portion is divided into a cutting portion and a calibration section,
the cutting portion having a cutting bevel, responsible for cutting work. The
calibration section is used to calibrate the size and the shape of the thread.
2. Spiral flute taps:
The spiral flutes have high cutting performance, eject chips
smoothly, leave no chips in the hole bottom, suitable for tapping sticky
materials. The chip-hold groove of Spiral fluted tap is spiral. According to
the application, they are divided into two kinds: Left spiral flute tap and
right spiral flute tap. Left Spiral flute tap tapping the chip to the bottom,
suitable for through hole. Right spiral flute tap tapping scraps discharge
upwards, so its suitable for blind holes.
3.Spiral pointed taps:
Suitable for through-hole and deep thread, have high
strength, long life, fast cutting, dimensional stability, explicit tooth
pattern (especially fine tooth). It opens chute in the side of the cutting edge
of the straight groove, to form an angle, the chips are discharged forward when
threading, suitable for through-hole processing. Relatively large core size
design, good strength, can withstand greater cutting force. It is suitable for
processing of non-ferrous metals and stainless steel and black metallic.
4. Thread forming taps:
These taps make threads by deforming the materials and do not
produce chips. They are suitable for the blind holes of rather soft material or
non-ferrous metals. The internally extruded and threaded metal has fibers which
are continuous and has high tensile strength and shear strength, and has good
surface roughness too.
5. Pipe taps
The pipe taps are used for mechanical joints purpose which is
cutting the pipe fitting threads. There are two kinds of types, taps for
parallel threads and taps for taper threads. The parallel threads are used for
mechanical joints. The taper threads are used for pressure type joints such as
water pipes and gas pipes.
6. Thread Milling Cutter :
The thread milling cutter is a new developed processing tool
in recent years. Its the combination of the milling cutter and the tap, using
milling for machining the thread, so we call it the thread milling cutter. It
is suitable for processing the large aperture work piece, avoid the
disadvantage of high cost for large size Taps.
We are specialize in manufacturing PCD diamond tools and
Carbide tools. Our major product include PCD Inserts , PCD Reamers , PCD End Mills ,
PCD Taps, Carbide Inserts, Carbide Drills , Carbide Reams, Taps etc.. Premium quality
of raw material is used in the production and strict examination during
processing with advanced equipment. Our best selling of cutting tools include
PCD Inserts, PCD End Mill , PCD Reamer , Carbide Taps, Carbide End Mills, Special
Form Cutter and many more.
Target of
our OPT cutting tools is always to improve your productivity and lower total
cost. If you encounter problems such as high-speed, high precision
requirements, low tool life and so on in the processing, you may contact us to
recommend appropriate design for you, we can provide customization per your drawing.
We looking forward to make a long business relationship with you.
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We are specialize in manufacturing PCD diamond tools and Carbide tools. Our major product inclulde PCD inserts, PCD Reamers, PCD End Mills, PCD Taps, Cabide Inserts,Carbide Drills, Carbide Reams, Taps etc.,
We also offered customized cutting tools per drawings, and provide package according to customer requirements. We manufacture a series range of cutting tools for machining of Cast iron, Aluminium alloy and Non-Ferros metal, it is widely used in all major sectors like Automobiles, Engineering, Aerospace, Aviation and 3C industry. Premium quality of raw material is used in the production and strict examination during processing with advanced equipment, so our client are satisfied with our reliable quality and on-time delivery.
Our best selling of cutting tools include PCD Inserts, PCD End Mill , PCD Ball Nose Mill, PCD Reamer, Carbide Taps, Carbide End Mill, Special Form Cutter and many more. For these years we have been made a large forward in the technologies of manufacturing cutting tools. With high quality on performance and price, our product sells well both on domestic and overseas market. And we will always focus on the quality and best service, to make long business relationship.
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Carbide Taps Carbide Taps,Thread Tap,Solid Carbide Taps,Pipe Tap Set OPT Cutting Tools Co., Ltd. , https://www.optdiamondtools.com
Liquefied gas valve use method Main characteristics of liquefied gas