One kind of flesh air mixer discharge door titanium plate

Security seal mechanism for curved doors and door frames connected
This technology provides a secure curved door and door frame padlock seal mechanism for the connection , the existing shaft side of the door leaf and door frames made ​​of the corresponding arc shape , composed of two arc tangent arc round stickers deputy campaign co bolt security seals on the door or door frame also has a corresponding flexible seal. When the doors open and close as the arc-shaped trajectory , and the door remains sealed contact. Shaft side doors and door frames using the corresponding full- fitting tamper proof seal arc deputy campaign structure, reducing the gap to the largest door to make more beautiful appearance , effectively blocking the intrusion of cold air-conditioning and dust , improve the indoor environment , and a thorough eliminate the traditional door shaft gap security risks .
Shutter doors and ventilation screens films agencies
This technology relates to a roller shutter doors and windows components, in particular , to a curtain shutter doors and windows breathable film agency. Which is mainly present in the prior art to solve the aluminum shutter window screens films for the whole pull tight security seals when closed will cause indoor air sealing , such as indoor , highly dangerous and other technical issues. This technology includes slats ( 1 ) , characterized in that said sheet comprises a curtain panel ( 2 ) and the internal padding of the filling layer ( 3 ) , the upper slat ( 1 ) is connected to the hook body ( 4 ) , hook body sheet or curtain opened holes ( 5) ( 1 ) , the lower side slats ( 1 ) there may be a connection with the bait under leptospirosis body ( 4 ) meshing with each other
A dry bulk containers and doors enhance the body end seals
 This technology provides a dry bulk and container door seal to enhance institutional side , the agency set up under the door seal inside the door at the end of the bottom shelf of the threshold of the formation , comprising: a sill , near the said door is provided on the side sill ; side seal , is provided on a vertical side surface of said upper threshold , and with the bottom end of the inner side surface of the door in the closed state of the door close contact with the end seal of the next door . Door seal the end of the technology enhancement mechanism can be further enhanced dry bulk container door end sealing performance and versatility, making easy construction, easy maintenance and replacement of the damaged .

Safety valve calibration sets titanium plate

Professional production safety valve calibration sets , valve gas barrier security seals testing equipment, suitable for direct load type and pilot safety valve set pressure , the back seat pressure and tightness and other performance tests. Safety valve calibration units mainly by gas source part , four-part control system , pressurization system , check the platform and other components , the pressure of the original container security seal and important accessories imported products, good Fixed Length plastic seal performance verification process , clean pollution , low noise, simple operation, wide measurement range, supercharged speed, has good control and maneuverability.
Second, the equipment features

1 , advanced equipment design principles , using Siming Te clamping pressure liquid booster pump source as well as a test booster Siming Te gas pressure source , the device is equipped with a gas cylinder , continuous testing.
2, the test pressure can be stepless adjustment, boost speed can be set.
3, all bearing parts are international famous brands of standard parts , without any solder connections for easy removal , high safety factor , long life and easy maintenance .
4, with power-down protection function , the system automatically after a power outage relief , terminate the test , to ensure maximum operating personnel and equipment

Third, equipment principle

Siming Te valve calibration units as long as composed of four parts : part of the gas source , control system, pressurization system , calibration platform.

1 gas source components: air source can be divided into control and preset gas source, the pressure is 0.3 - 0.6Mpa air or nitrogen gas as a source of control , preset bottled nitrogen gas source is usually the source .
2 control system: by observing the gas source and gauge pressure booster system , and by adjusting the precision pressure regulator . Optional computer control system, data acquisition test process , automatic control, save and print test data reports and other functions.
3 booster systems : the思明特booster , check valve, accumulator, safety valves, vent valves and other components.
4 checksum platform : the installation table, sealing disc , pressure plate bolts and other components .

Technology titanium plate

 Technology , means for sealing plastic bags on the market most of the limited number of conditions , resulting in the number of Fixed Length plastic seal plastic bag or sealed plastic bag size is not satisfactory . In order to achieve free to use , not how much the size of the sealed bag , seal clip quantitative restrictions , the cable zip ties method can achieve a simple , my choice for the common market, improved sealing technology for simple , namely: use an ordinary ziplock ( bone bags ) the seal , it would be lengthened, widened , made rolls, similar to the type of transparent tape , double-sided adhesive technology lessons , it has a double-sided adhesive on both sides outward characteristics , made plastic adjustable length seal tape. When in use, without additional preparation of plastic bags, plastic bags according to size of the opening , any cutting length , affixed to the inside of the bag mouth , and then sealed. With this design, you can carry the seal used regardless of location , not a plastic bag size , limiting the number of greatly improving the flexibility of use , and easy to use , low price, you can improve the life of a plastic bag and utilization, thus achieving environmental protection.

Mini sealing machine titanium plate

Mini sealing machine , including electromagnetic induction sealing machine and continuous induction sealing machine , which is the use of electricity
Principle of magnetic induction , production instantaneous heat fused on aluminum foil rail car seals against moisture and fungus ﹑ ﹑ leak
The purpose of the sealing effect and extend the shelf -cycle
Through the network to retrieve and life observation, I summed up the plastic seal on the market can be divided into two
Kinds: one is attached to a plastic bag plastic seals device itself , because it is itself a plastic bag with a large plastic bag
Little has decided immutable , restricted use. Another is to rely on a single product , device density
Closure , the need to purchase another product , such as seal for containers clip , when the place of use , such as limiting the number of affected ; electric sealing device enables
With conditions , the process is complicated and unpleasant odor, not environmentally friendly, low resealable rate. These sealing techniques ,
Flexibility of use when the device is not strong , relatively narrow range . I'm trying to design a strong randomness can
Repeated sealed plastic bag type, size, without demanding sealing products .

Seal bag clip titanium plate

It is a sealed plastic bag clip vehicle seals plastic bags used , which consists of the clamp body , lower body and the connecting piece clip composition , the clip has a ridge on the body and the bolt with a groove on the lower clamp body and the lock claw ; rib and groove dimensions, size, position cooperates with the locking hook tongue size , size, location matched . Mouth closed when using the plastic bags placed between two parts of a bunch of clip body , tighten the clamp body , so that the lock latch and hook together, the ribs can be pressed into the groove with a mouth clamped to Meter seal effect. Has simple structure, low cost, for sealing plastic bags, simple, good sealing effect . I'm still on ebay retrieved some of the issues related products : mini sealing machine , including electromagnetic induction sealing machine and continuous induction sealing machine , which is to use the principle of electromagnetic induction to produce instant heat fused aluminum foil sealing , the play mildew and other moisture ﹑ ﹑ leak
Seal and extend retention periods purposes.

Plastic bag sealing tape titanium plate

Technology Innovation I invented a plastic bag sealing tape , plastic security seal tape mouth innovation design, easy to carry , easy to use and flexible . When used to solve the location , size and number of the limitations of the conventional hermetically vehicle cargo seal bag , and to also have a non- sealed plastic seal , without the use of additional heating or plastic , to improve the utilization of plastic , play the role of environmental . Keywords : Innovation Indicative Seals plastic bags in the green tape convenient as both a necessity of daily life are widely used , but also caused serious environmental pollution. To mitigate the negative environmental impact caused by the use of plastic bags , the Chinese Ministry of Commerce , NDRC and SAIC plastic limit development on the basis of international experience and learn from some areas of the country , jointly issued the " retail establishments paid plastic shopping bags management approach " , which became effective on June 1, 2008 . The policy does make use of plastic bags to reduce plastic bag usage and increased again in the spirit of promoting and participating in environmental thinking, I pay attention to find in life , research, innovation and the plastic bag sealing tape so as to contribute to environmental protection the modest.

Viton seals installed to check titanium plate

We take a bath with shower at home , if not in the middle of the rubber seal , then the water will flow out from the middle of the shower head and the pipe , is not conducive to a better flow of our larger body wash , with that little  surgical implant titanium can be solved , and our hands warm in winter to warm rubber handbags, also has a rubber cover in the middle seals . Those are made ​​with Teflon .
    Because there is between the seal and the shaft rail car seals edge control film, this film has a fluid lubrication properties. Under the effect of liquid surface tension , the stiffness of the film happens to end in contact with air so that the film forms a meniscus prevents leakage of the working medium , the rotating shaft in order to achieve sealing . Seal sealing ability , depending on the thickness of the sealing surface of the film thickness is too large,  tittanium bar  leakage ; thickness is too small , dry friction may occur , causing oil seal and shaft wear ; no oil film between the sealing lip and the shaft , is easy to cause fever, wear .
    Therefore , during installation , the seal must be applied some oil , while ensuring that the vertical axis of the oil  medical titanium plate , if vertical sealing lip seal will drain the lubricating oil from the shaft , the sealing lip can also cause excessive wear. In operation , the lubricant leaking point slightly inside the housing to reach the state of the oil film at the sealing surface is ideal.
A mechanical seal installed
1, check the installation of mechanical seals models , specifications are correct.
2, check the host associated with the installation of the mechanical seal parts of the dimensional accuracy and geometric accuracy and compliance with the technical requirements of the relationship . Mainly in the following areas:
( A ) Radial shaft sealing parts of the mechanical ( or sleeve ) runout tolerance , the shaft ( or sleeve ) and the outer diameter surface finish tolerances.
( 2 ) the seal chamber and the end face of the shaft gland combined with positioning ( or sleeve ) vertical centerline of the degree of tolerance.
( 3 ) Install a shaft seal ring ( or sleeve ) of the end portion , and the finish end portion of the chamfered structure of the mechanical seal housing mounting hole.
( 4 ) the amount of axial displacement of the shaft mechanical seal work.
3 , during the installation of mechanical seals should be kept clean and not allowed to use tools beat the sealing element to prevent damage and destruction.
4 , installation, dynamic and static ring surface should be coated with a layer of clean oil and turbine oil . Secondary seal ( including dynamic and static ring ring ring ring ) before installation also need a clean coat of oil or turbine oil , in order to ensure a smooth installation .
5, the stationary ring seal trap in the back of the stationary ring , into a sealed cover, pay attention not to hurt the stationary ring , to ensure that the static ring face and cover the vertical centerline , and pay attention to the stationary ring to the back of the anti-rotation slot aligned with anti-rotation pin , but not in contact .
6, the rotating part of the mechanical seal , relies on two spring seat fixed shaft fixing screws and tighten the screws fixed to ensure that the working length of the spring .
     Since the rubber seals to make life particularly handy little things have changed , and in industrial applications is all the more important, the rotating part of the mechanical seal , relies on two spring seat fixed shaft fixing screws and tighten the mounting screws , the required work of the spring length. Correct use of seals , which can effectively prevent danger arising

Ball instructions titanium plate

Precautions electric or pneumatic actuators see the corresponding instructions.
( 1 ) , take down the sides of the cover flange end , the valve in the fully open state to wash clean.
( 2 ) , the signal should be required prior to installation (electric or gas ) in the whole test ( to prevent vibration from transport performance ) , after passing the on-line installation ( wiring by electric actuator wiring diagram ) .
( 3 ) , prepared with the former pipe connections must be flushed and cleaned pipeline residual impurities ( these substances may damage the tamper seal labels and ball ) .
( 4 ) during the installation, please do not use part of the valve actuator as the lifting of the lifting points to avoid damage to the actuator and accessories.
( 5 ) The class valve should be installed in a horizontal or vertical direction of the pipe .
( 6 ) , installed near the pipeline can not have bowed to withstand external force or phenomenon , you can use the pipe support brackets to eliminate or deviate from the pipeline .
( 7 ) After the pipe is connected , use the specified torque cross- locking flange bolts.
Operation and Use vehicle seals
( 1 ) , subject to confirmation piping and valves have been washed off before the operation . ( 2 ) , valve operation by the size of the input signal to drive the actuator stem rotation completed : forward rotation 1 /4 laps ( 900 ) , the valve off. Reverse rotation of 1/ 4 turn ( 900 ) , the valve opens. ( 3 ) When the actuator directional arrows parallel with the pipeline when the valve is open ; indicator arrow with a vertical line , the valve is closed .

Ball explained butt titanium plate

Ball explained butt welding in the construction of the following description when using :
1, to confirm the installation of ball location . When the ground water or moisture , or to change the installation location of water or moisture is completely removed , the site is not guaranteed to sink , the foundation must be strong pressure , then at this time the coloured cable ties was adjusted to a position level with the ground .
2 , the first end fixed to the pipe welding machine package after opening the ball valve , the ball is fixed at one end , if the fixed length is not sufficient butt welding machine , not fixed on the machine using two fixation of valve, ball valve and the other end fixed machine transferred the same height .
Fixed surface machining → ​​→ → heating plate mounting pressure welding heat to maintain → → → → cooling welding machine bonding separation
3 , the other end of the tube is fixed by welding After welding
NOTE: To identify the arrows on the operating side of the ball must be consistent with the flow of gas . In order to prevent the inflow plastic cable ties welding operations using different materials such as bags inside the inner surface of the ball to block the ball . Pipe and welded ball valve to the horizontal and vertical state .
4, after the separation of the welding machine takes about 30 minutes to cool
5 , the "T" type ball grip removed from the box , after assembly , and then fully inserted into the handle knobs . Note:
Use the "T" handle to test the ball off.
6 , to confirm whether the switching ball . ADAPTER linear PE pipe length and direction of the ball must be marked ( - and this was turned on, the straight line perpendicular direction indicator ( ‖ ) and this was closed, closed (CLOSE): In the open state of the ADAPTER clockwise direction rotate 90 °, open ( open ) : ? put in the closed state in the direction of counterclockwise rotation ADAPTER 90 °, GEARBOX of TOPADAPTER about 180 °, the switching operation of the rotation arrow 90 ° , the fully closed state (FULLCLOSE), the fully opened state (FULL open ) state can not be opened or closed momentum
7 , using the elution ball tightness test .
8 , ball knobs surrounding the use of sand laying.

Ball for occasions titanium plate

Typically, two-position adjustment, strict sealing performance, mud , wear , necking channel , opening and closing action quickly ( 1/ 4 turn open and close ) , high-pressure cutoff (large pressure ) , low noise, there is the phenomenon of cavitation and gasification , a small amount of leakage into the atmosphere , a small operating torque , fluid resistance of the piping system, the recommended valve . As the ball is usually rubber, nylon and PTFE plastic strap seals material as the seat , so its use is limited by the valve seat ring material . As of action is to rely on the metal ball in the role of the media sphere , pressing each other between the plastic seat to complete ( floating ball valve ) . Valve seat ring at a certain contact pressure, elastic-plastic deformation occurred in some areas . This distortion can be compensated for manufacturing precision and surface roughness of the sphere , to ensure the valve pull tight straps performance . Also, because the ball valve seat ring is usually made ​​of plastic , it is in the choice of the structure and properties of ball , taking the ball of fire and plastic security seal , especially in the petroleum, chemical, metallurgy and other sectors , flammable, explosive media the types of equipment used in the system and the pipe valve, should pay attention to fire and fire . Ball also applies to the lightweight construction , low cut ( pressure difference ) , piping systems corrosive medium. In the low temperature ( cryogenic ) equipment and piping systems can also be used ball . In the metallurgical industry, oxygen pipeline system , use to skim over the ball rigorous process .
When the oil pipeline and gas pipeline to be laid in the main line in the ground , use a full-bore welded ball valve .
Require adjustment during the performance , the need to use special structures ball with V -shaped opening . In the petroleum , petrochemical, chemical, power, urban construction, the operating temperature above 200 ℃ piping systems can use metal -to-metal sealing ball valve .

Ball analytical composition titanium plate

The main valve seat ring material is polytetrafluoroethylene (PTFE). It is almost all chemicals are inert and has a low coefficient of friction , stable performance, easy to aging , wide temperature and excellent tamper proof seals performance integrated features . However, the physical properties of PTFE has a higher coefficient of expansion of the cold sensitivity and poor thermal conductivity, the valve seat tamper proof seal requirements must be designed around these characteristics. The seat seal plastic material, including aliphatic and PTFE Teflon , nylon and other materials .
However , when the sealing material is hardened , the reliability of the pull tight security seals should be destroyed , especially in the case of low pressure differential .
Additionally , such as nitrile rubber, synthetic rubber , can be used seat material , but it applies to the media and to the use temperature range is limited . Further , non-lubricated , synthetic rubber ball stuck easily .
In order to meet the high temperature , high pressure , strong erosion, long life and other requirements of industrial applications , the last decade, metal seated ball valve has been a great development. V- ball valve for regulating the flow also developed rapidly .
Especially in industrialized countries , the ball valve structure continue to improve, as used in the petroleum, natural gas pipeline fully welded ball valve , lift rod ball , ball cracker with temperature regulating valve V -shaped openings , etc. , so that the ball valve technology to achieve a whole new level .

Ball valve sealing principle titanium plate

Sealing principle ball varies according to their structure . Common valve structure can be divided into floating ball valve and fixed ball valve two categories. The ball valve stainless steel ball float freely supported on the seat ( see Figure 1-1 ) . Under fluid pressure , the ball in the flow direction of displacement produced , making it more closely in contact with the valve seat sealing surface , i.e. the plastic padlock security seals surfaces than the pressure increases, the seal formed in one side ' while the valve before the valve seat sealing surface than the pressure is reduced accordingly , often do not guarantee seal. Central Fujian fixed balls , sphere having upper and lower shaft, the bearing is fixed in the sphere .
Thus , the position of the sphere fixed : displacement fluid pressure can not make it . However , it is a floating valve , the spring means are pressed against the ball or semi- fluid , to establish bolt security seal pressure . Thus fixed ball stainless steel ball valve can be designed according to the requirements of three seal cable structure : front seat sealing valve , the valve seat seal , front valve seat seal .
Ball by Ball Installation Category:
By Sphere installation, stainless steel ball valves can be divided into four types of roof -mounted , bottom -mounted , side-mounted and mounted and so inclined . Which is essentially a bottom -mounted ball busy with the same top-mounted , due to mounting is not convenient , not much use , it does not introduce separately. For side-mounted stainless steel ball valve , according to different occasions and diameter size , body style there are two integral parts, and split and currency dyad and triad points.

Ball Classification and Features titanium plate

Ball Ball and O- V-ball points.
O type ball floating structure , core for precision castings, hard chrome plated exterior , seat with PTFE material , the same stream crossing and pipeline diameter , flow capacity is great, the flow resistance is extremely small, closed without leaks, generally make the switch valve, especially for high viscosity , fibrous , granular media ; V -ball fixed structure, has  medical titanium bar  a V -notch ball core, proportional control can be achieved , approximately equal percentage flow characteristics .
Choice of pneumatic or electric, pneumatic valve and were composed of electric valve , depending on process equipment , including pneumatic valve as required to achieve the proportional control valve with positioner, electric valve as required to achieve the selected electronic proportional control electric actuator or servo amplifier with and surgical implant titanium.
From the material , can be divided into : carbon steel ball valves, stainless steel ball valves 304 , 316 and copper ball valve.
On with the application , can be divided into : high pressure and low pressure ball valve. Pressure valve : mainly used in oil, gas, hydraulic oil , construction machinery and other industries. Low Ball: mainly used in the medium of water and other non -corrosive piping.

Fixed ball characteristics and titanium plate

1, two obstruction and discharge function : Fixed ball valve spring preload floating seat when the valve is either fully open or fully closed state , on the downstream side of the valve seat to block fluid , the valve body cavity left by the discharge valve excretion .
2 , automatic pressure relief function: the valve body cavity stays medium temperature caused when abnormal pressure , without going through the safety valve, which can function alone automatic pressure relief valve , this valve to ensure safety in the transportation of liquid medium is very important .
3 , fire safety structure: Valves are equipped with fire safety features, its design, manufacture and API6FA were followed API607 specifications.
1 , sealing grease emergency ambulance : As media objects or accidental fire caused seat barrier security seals failure , grease valve provides a quick connection to the grease gun , pump inlet seal fat quickly and easily injected into the valve seat sealing parts , ease leak.
2 , reliable stem seal and low operating torque: In addition to setting the standard container security seal rings , but also set up the packing gland "O" -ring, double sealed to ensure the reliability of the valve stem seals ; additional graphite packing and seal fat injection to stem the leak after the fire to a minimum. Stem sliding bearings and thrust bearings easy operation of the valve .
3 , full bore or reduced bore : may need to use full bore or reduced bore structure. Full Bore Valve flow aperture is consistent with the internal diameter of the pipeline , the pipeline for easy cleaning .
4 , the stem can be lengthened : required installation or operation of the valve stem can be lengthened . Extensions ball , especially for city gas pipeline laying underground and other needs of the occasion. Long stem size is determined by customer needs .
5 , flexible operation : using a small friction coefficient and excellent self-lubricating bearing seat and a valve stem , the valve is greatly reduced operating torque . Therefore, even in the case of not providing a adjustable length plastic seal grease , can be flexible and comfortable for the long-term operation of the valve .

Fixed ball characteristics and titanium plate

1, two obstruction and discharge function : Fixed ball valve spring preload floating seat when the valve is either fully open or fully closed state , on the downstream side of the valve seat to block fluid , the valve body cavity left by the discharge valve excretion .
2 , automatic pressure relief function: the valve body cavity stays medium temperature caused when abnormal pressure , without going through the safety valve, which can function alone automatic pressure relief valve , this valve to ensure safety in the transportation of liquid medium is very important .
3 , fire safety structure: Valves are equipped with fire safety features, its design, manufacture and API6FA were followed API607 specifications.
1 , sealing grease emergency ambulance : As media objects or accidental fire caused seat bolt seals failure , grease valve provides a quick connection to the grease gun , pump inlet seal fat quickly and easily injected into the valve seat sealing parts , ease leak.
2 , reliable stem seal and low operating torque: In addition to setting the standard pull tite seals rings , but also set up the packing gland "O" -ring, double sealed to ensure the reliability of the valve stem seals ; additional graphite packing and plastic strap seals fat injection to stem the leak after the fire to a minimum. Stem sliding bearings and thrust bearings easy operation of the valve .
3 , full bore or reduced bore : may need to use full bore or reduced bore structure. Full Bore Valve flow aperture is consistent with the internal diameter of the pipeline , the pipeline for easy cleaning .
4 , the stem can be lengthened : required installation or operation of the valve stem can be lengthened . Extensions ball , especially for city gas pipeline laying underground and other needs of the occasion. Long stem size is determined by customer needs .
5 , flexible operation : using a small friction coefficient and excellent self-lubricating bearing seat and a valve stem , the valve is greatly reduced operating torque . Therefore, even in the case of not providing a sealing grease , can be flexible and comfortable for the long-term operation of the valve .

Wrought Nickel-Titanium Shape Memory titanium plate

Standard Specification for Wrought Nickel-Titanium Shape Memory Alloys for Medical Devices and Surgical Implants

1.1 This specification covers the chemical, physical, mechanical, and metallurgical requirements for wrought nickel-titanium bar, flat rolled products, and tubing containing nominally 54.5% to 57.0% nickel and used for the manufacture of medical devices and surgical implants.
1.2 Requirements are for mill product titanium standard parts, measuring 6 to 130 mm (0.24 to 5.12 in.) Diameter or thickness, in its annealed condition.
1.3 The values ​​stated in SI units are to be regarded as the standard. The values ​​given in inch-pound units are for information only.

medical titanium plates

Titanium wire used in waste packaging system
Final disposal of nuclear waste is a difficult subject , but also a complex international political issues. Highly radioactive fission products will last for more than a century , radioactive copper-based elements can even continue to millennia , so you need to put them
medical titanium plates standard parts processing methods and purposes
Titanium standard parts into a variety of applications need to be machined . Titanium standard parts processing methods have cutting , vacuum casting , etching and spark superplastic forming. Due to the ever-changing form of denture parts and vary, so the vacuum casting is the best way to present
Titanium and titanium plates creep and stress relaxation
Titanium and titanium alloy materials in the plant at room temperature forming, shaping force due to the small amount of deformation limit and great resilience , which gave the manufacturing process has brought a lot of difficulties , especially in the rebound to make the entire amount of labor hand injury large batch production can not meet the requirements . Hot
Revitalization of medical titanium bar ore suppliers need to develop market
Titanium ore prices have fallen to lows for three years , a number of industry analysts, due to the shrinking downstream demand , the future price of titanium concentrate fear there is further downward trend.

medical titanium plate

The company is the production of non-ferrous metals titanium whole distributors and integrated device manufacturers . The main products : titanium tube, titanium, titanium clad steel plate , titanium tube, titanium standard parts , titanium sintered filter tubes , nickel tubes, plates, titanium tube titanium metal equipment heat exchangers, condensers , evaporators, reaction of titanium kettle , titanium / steel composite reactor, polymerization reactor, titanium tank, plate heat exchanger , titanium coil heat exchanger, titanium tower , titanium container , titanium mixers, titanium filter, titanium cathode roller , titanium species plate , medical titanium plate electrode , titanium basket, titanium rack, titanium tanks, titanium a second class pressure vessel . Our products are widely used in salt, chemicals , petroleum , pharmaceuticals , dyes, electroplating, environmental protection and other industries.