|
-----------------Water Chiller Details----------------
Water chillers provide constant temperature water for equipment.Water chiller working principle
is to move equipment’s heat emission to chiller’s water tank passes the medium-Water; Heat
stored in water tank passes the medium -- Refrigerant, replaces to the condenser of the water
chiller. Heat stored in condenser will taken way by rotating fan (air-cooling type) or
transferred in to the cooling water (water-cooling type).
The choice of water chiller
Cooling Capacity
For normal operation of the equipment, please choose right type water chiller (cooling capacity
is over 120% of equipment’s heat emission).
Cooling capacity of water chillers made by ZHONGHE range from 300W to 300KW, general types are:
300W, 500W, 1KW, 2KW，5KW，8KW，12KW, etc.
Temperature Stability
For the normal operation of the equipment, please choose Temperature stability of the water
chiller, usually, equal to or above the stability requested by the equipment.
The stability of water chillers made by ZHONGHE ranges from ± 0.1℃ ～± 2℃, the general
specifications are
Type B (upper & lower limit): ±2℃,
Type R (Hot Vapor Bypass): ±0.5℃, ±1℃
Type H (high precision): ±0.1℃( the cooling capacity is higher than 5KW),
Temperature Rang
For the normal operation of the equipment, please choose temperature control range, usually
equal to or above the temperature control range the equipment requested.
Temperature control range of water chillers made by ZHONGHE is between ﹣20℃ ～﹢35℃, general
specifications are: ﹣20℃ ～0℃,﹣5℃ ～+10℃, +10℃ ～+35℃.
Types of water chiller
Types of water chiller made by ZHONGHE are: divided type, integrated air-cooling type, and
integrated water-cooling type. Buyers may choose from those threes types according to their
installation condition.
1) Features of divided-type are: the indoor unit is small, low noise and little heat emission;
but the installation must be operated by professional workers, and there should be suitable
installing place for outdoor unit, the installation can not be moved.
It is applied to situation which owns the space to install outdoor unit of the water chiller.
2) Features of integrated air-cooling unit are: the installation is no need to be operated by
professional worker, and the unit is removable after installation. However, the unit is larger
than the divided type, its noise is higher and it emits heat, if the cooling capacity of water
chiller is higher than 5KW, it should be placed in a single room.
It is applied to situation which places in a single room, or cooling capacity of small water
chiller is lower than 2KW
3) Features of integrated water-refrigerated unit are: the installation is no need to be
operated by professional worker, the unit is removable after installation, the unit is small,
emits no heat and low noise; however It must connect external cooling water and the sewer or
return pipe.
It is applied to situation which dissatisfy the installation condition of air-cooling type, be
allowed to pour water, or own circulating water resource. for instance Clean Room.
 
-----------------Press machine Details------------------
The XRF is one relativity analysis method, unknown sample have to the standard sample the same
density distribution which the calibrations curve uses. XRF analysis requests the compression
pressure of samples and compression process is fully consistent. The ZHY series Press Machine
is the ancillary equipment for XRF.
The choice of press machine
The automatic presser has a pressure transducer and automatic hydraulic pressure system which
adopts the program system (PLC) for exact control. According to the preset program and the
signal sent by the press transducer, the presser may control the pressing procedure exactly;
furthermore, the operation state can be presented all the time. After choosing the pressing
style, we only need press one button to start and over the whole pressing procedure
automatically. The pressing quality could be assured without concerning the operation.
Manual presser has pressure transducer and pressure meter. The pressing is finished by hand,
the read of pressure meter need to be checked for special operator. In addition, the pressing
quality is influenced by the experience of operator. The consistence of the quality is hard to
keep.
The highest pressure
According to the demand of the pressing of different material, various
pressure need to be
chosen. The proper pressure is between the 20%~80% of the highest pressure. For example, if the
pressing asked for 300KN, ZHY-401 is appropriate, if the demanding pressure is about 400KN,
ZHY-601A press machine could be used.
Choice of vessel
The ZHY series’ press machine, with integrated mold pressuring technology, is applied for
boric acid, steel ring, aluminum cup, plastic ring and low-pressure polythene pressuring.
Choice vessel mainly decided by the using habits or industry standards. Cost of boric acid is
lower, so it is applied most widely. Plastic ring can be easily used; steel ring is most
durable and the first to be applied for presser. Fewer users adopt aluminum cups, and low-
pressure polythene because they are for special sample pressing.
Special design
1)Automatic slow-pressurization: push “Start” button, the press head will move upward quickly
towards the sample, and as the space between the press head and sample decreases, the press
slows down and begins slow pressurization until it achieves the set upper limit. This process
causes the air to be removed and the compression of the sample to be even thus enhancing the
overall quality of the sample.
2)Automatic slow-decompression: when the pressure-holding episode is completed, the press
begins slowly releasing pressure as the press head moves downward automatically. (For during
the pressing procedure, vacuum forms between the press head and the sample, if the pressure is
removed suddenly, the fast downward press head may deform the pressed sample.) After the press
head is out of contact with the sample, the head falls quickly, providing an efficient means of
production.
---------------Grinding Mill Details------------------
The XRF is one relativity analysis method, unknown sample have to the standard sample same
grain-size distribution which the calibrations curve uses. XRF analysis requests the sample
powder to have the extremely fine degree and homogeneous degree.
The ZHM series Grinding Mill is the ancillary equipment for XRF, satisfy these two requests.
The ZHM rotational speed the choice
1)1400r/min grinding mill is high grinding efficiency; as well as higher decibel noise and
faster speed of temperature rising of the vessel during the grinding process.
2) 910r/min grinding mill is efficiency is lower somewhat low, lower decibel noise, slower
speed of temperature rising of the vessel and the capacity of producing the same standardized
grinding quality.
3) ZHM-1-250, ZHM-3B are designed for industrial manufacture; ZHM-3B is designed for grind
large quantity sample.
4) ZHM-1V and ZHM-1T are designed for experimental purpose—laboratory. Some sample chemical
properties change after the temperature rises, so you need to choose ZHM-1V, or ZHM-1T.
5) ZHM-1V has the device of frequency change according to customer’s various demands.
Charging granularity:This is the size of the input samples (before grinding).
Vessel includes vessel body, impact ring, and impact block. The sample places between them, the
sample diameter is most greatly 5mm
Discharging granularity: This is the result of output samples (after grind)
Discharging granularity is the sample diameter after grinding.
Fill sample
Vessel the most used of goods shipped quantity is 100cc.
We recommend you to fill 20~40 gram sample once.
Choose proper vessel: (Tungsten Carbide, Chrome-Steel, and Manganese-Steel)
Firstly the rigidity of the sample should be taken into consideration; the vessel should be
harder than the sample. If you deal with fast and intense grinding, you may choose tungsten
carbide vessel; the second factor is the influence of the material to the analysis. Tungsten
carbide can be used while the inspect of the sample should not be affected by the existence of
element of carbon, tungsten or cobalt; Chrome steel vessel can be used while the inspection of
sample may not be affected by the appearance of iron or chromium element; Manganese steel
vessel can be used when the inspection will not be affected by the presence of iron or
manganese element.
Vessel amount
If you are only a sample measurement, and very few samples, a vessel is enough, if you are
measuring two or more samples, or sample volume for a long time, a vessel is not enough.
After grinding the first kind of sample, you need to carefully clean-up vessel, or else there
will be remnants of the sample, when you are grinding the second sample, the first sample will
pollute the second sample, and will affect XRF the analysis result.
In addition, vessel in the grinding will heat, if you measured the amount of samples for a long
time, vessel of the temperature rise, the sample will stick in the vessel wall, the impact on
the quality of grinding. Then you need to wait for the vessel's temperature dropped to below 50
℃, and then grinding of samples. Our customers tend to buy more than a few vessels.
|
