Cryogenic pump features

[Asia Fluid Network News] Cryogenic pump is mainly the delivery of liquid hydrocarbons, liquefied petroleum gas, liquefied natural gas, liquid oxygen, liquid nitrogen and other low-temperature liquefied gas vacuum pump equipment. The temperature of these gases is usually -30 --- l96 ℃, understand the characteristics of cryogenic pumps for more efficient use of such products has a very important role. Next mainly introduces the characteristics of low-true pump through three aspects. Cryogenic pump 1. High pressure at the pump inlet Liquefied gas is normally at ambient temperature and atmospheric pressure and becomes liquid only under certain pressure and low temperature conditions. Such as ethylene plant, liquefaction of methane is 3MPa, -l00 ℃; ethylene liquefaction conditions of 2MPa, -30 ℃. 2. Strict requirements on the shaft seal Most liquefied gases are corrosive and dangerous, so do not allow leakage to the outside world; once liquefied gas leak bitch. As the liquefied gas vaporization heat easily lead to the sealing parts of the icing, cryogenic pump delivery of liquefied gas on the shaft seal of the very strict requirements. 3. Vapor pressure changes sharply with temperature Liquefied gases delivered by cryogenic pumps are usually saturated (or with a slight subcooling). The vaporization pressure of this liquid has a very significant temperature change. Generally when the temperature changes ± 25%, the vaporization pressure can change ± (100 0A - 200%), meanwhile the physical properties of the medium such as density, specific heat capacity and latent heat of vaporization will also change. For example, when the temperature rises, the vapor pressure increases sharply, the density decreases, the specific heat capacity increases, the latent heat of vaporization decreases, the liquefied gas is more easily vaporized, and the inlet pressure is increased, which affects the strength of the pump body; Vapor pressure within the tank decreases, but also through the suction tube 蔫, but also easy to absorb heat from the outside heat, which will result in NPSH. Of the decline, the deterioration of inhalation cavitation performance, and therefore must be fully insulated suction pipe cold, so that the suction tank temperature fluctuations do not often. Pipeline at the same time should try not to set spherical lanthanum, throttling, filters and other throttling device, so as not to cause local pressure drop, the liquefied gas vaporization. In summary, the cryogenic pump at work there are many areas of concern, and only a real understanding of its characteristics, the producer can better improve and enhance the product, consumers can better choose the product and use the product. With the development of the vacuum pump speeding up, how to make the cryogenic pump to maintain its own advantages, there is still much work to be done, relevant professionals can pay attention to the relevant data research. Related articles: Sputtering ion pump features getter ion pump features

Asbestos Rubber Sheet is made of excellent asbestos fiber, rubber and other chemical materials.Formed by rolling after special mixture treatment .The sizes is 0.5~6.0mm can be supplied.It is mainly for such media as water and vapor and applicable to sealing and heat-insulation used in the industries as machinery, automobiles, farm, machinery and petroleum.

Asbestos Rubber Sheet is made using high-grade raw-material and cutting-edge technologies.For its multi-purpose in nature, highly flexibility, non-degradable in nature and the ability to withstand sun, ozone and weather, this range is various industrial applications.

Model:
1. High Pressure 400-510° C, Pressure:4.0-7.0Mpa
2. Medium Pressure: 300-380° C, Pressure :3.0-4.0Mpa,
3. Low Pressure: 200-250° C. Pressure: 2.0-2.5Mpa
Type:
1. Asbestos Rubber Sheet
2. Asbestos Rubber Sheet With Graphited
3. Asbestos Rubber Sheet With Steel Wire Inserted
4. Wire Reinforced Asbestos Rubber Sheets With Graphied
5. Oil-resistance Asbestos Rubber Sheet
6. Acid-resistance Asbestos Rubber Sheet

7.Corrosion-Resistance Asbestos Rubber Sheet

DIMENSION:
4100×1500mm; 4500 x 1500mm;2000×1500mm;

1500×1500mm;1500×1000mm;1540x1360mm

1270×1300mm; 3810×1300mm

Thickness: 0.5~6.0mm

STANDARD:GB/T3985-2008

PARAMETER of Asbestos Rubber Sheet

Item	XB510	XB450	XB400	XB350	XB300	XB200
Lateral Tensile Strength/MPa ≥	21.0	18.0	15.0	12.0	9.0	6.0
Aging coefficient ≥	0.9
Loss on ignition/% ≤	28.0			30.0
Compression ratio/%	7~17
Recovery/% ≥	45			40		35
Creep relaxation rate/% ≤	50
Density(g/cm3)	1.6~2.0

Asbestos Rubber Sheet

Asbestos Rubber Sheet,White Rubber Sheet,Black Rubber Sheet,Asbestos Packing Sheet

HEBEI HENGDA SEALING MATERIALS CO.,LTD. , https://www.hengdasealing.com