过滤器说明书英文.doc

过滤器说明书英文

2
2020年4月19日
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SLAF Series
Compressed-air Secondary Filter
Operation Manual

HANGZHOU SHANLI PURIFY EQUIPMENT CORPORATION

Contents

I. Product Profile 2
1. Product Overview 2
2. Structure and Working Principle 2
II. Configuration and Installation 5
1. Standard Pipeline for the Filters 5
2. Basic Configuration/Installation Pattern of the Filter 5
3. Other Configuration/Installation Patterns of the Filters 6
III. Selection and Maintenance Requirements 6
IV. Troubleshooting 7
Appendix: Chemical Corrosion Resistance Performance of the Filter Series 8

Prior to startup, please read this manual carefully

I. Product Profile
1. Product Overview
When free air from atmospheric environment is compressed by an air compressor, the hazardous substances like moisture, dust, and oil mist are fed into the pneumatically operated equipment and instruments along with compressed air. Such a high-temperature, high-moisture and high-pressure air flow may cause serious corrosion and contamination inside the expensive pneumatically operated device, instruments and pipeline soon, not only affecting the product quality, but also resulting in equipment failure/fatal accident due to inaccuracy of the instruments and devices. Furthermore, many industrial air sources for chemical fiber, printing, spray painting, mixing, pneumatic conveying, and pneumatic automated equipment are directly connected to the process tools for working procedures, which require that the compressed air shall be pure, dry, and free of any oil and dust. Therefore, it is essential to have the compressed air subjected to further purification treatment so that it may meet the production requirements, and compressed air drier supported by secondary filter can surely satisfy such requirements.
2. Structure and Working Principle
A secondary filter mainly consists of a filter element and a filter housing, and the latter may be divided into 2 basic types i.e. flange type and gland type as per different structures (Fig. 1 and Fig. 2). The upstream compressed air enters into the filter element through the air inlet and the air vent in the upper end of the filter element (5). The filter element is composed of multiple layers of filter materials capable of different functions. The compressed air separates and traps the moisture, dust, oil mist, and chemical substances with peculiar smell by means of effects of interception, inertia, gravity force, diffusion and adsorption, and are therefore. Pure compressed air reaches the downstream from the air outlet channel in the filter housing through the filter element (5), and is continually fed into the pneumatically operated equipment. The trapped hazardous substances like moisture, oil mist and dust are collected to the bottom of the cartridge (6) of the filter housing, and are discharge out of the machine through the valve that is automatically opened by the automatic drain trap when a certain volume is reached. The air inlet/outlet channels of filter housing are separated by baffle (2) and O-shaped rubber seal (3) of filter element. The filter housing is designed, manufactured and tested as per relevant technical standards for pressure vessel. Filter elements are a type of tubular parts composed of multi-layers of different materials, and may be divided into 5 basic specifications namely HC, HT, HA, HF and HH as per varied filtration functions (see Table 1):

Air outlet Air inlet
Air outlet Air inlet

Drain outlet
Drain outlet
Fig. 1 Flange Type Filter
Fig. 2 Gland Type Filter
1- filter housing gland 2 - baffle 3- filter element seal ring 4 - cartridge seal ring
5- filter element 6- filter housing cartridge 7 - ball valve 8 - automatic drain valve
Table (1)
Type
Construction and functions
Range of application
HC-class main pipeline filter
Internal support screw rod stabilizes the filter element and protects it from vibration.
2-stage filtration:
Stage 1: Stainless-steel web core separates solid particles of 10μm or greater by centrifugal force.
The second stage is made of replaceable glass fiber and can completely remove solid particles of 3μm orgreater, and the moisture is brought to the bottom of the filter by gravity force and is then drained.
The allowable moisture content of upstream air is up to 256000PPm.
Moisture is removed by 99%, and the residual content of oil mist reaches 5PPm.
Separator of after cooler, separator of freeze drier, and pre-filter of main pipeline
HT-class secondary filter
Internal support screw rod stabilizes the filter element and protects it from vibration.
Multi-layer glass fiber filters solid particles of 1μm or greater.
Multi-hole external cartridge allows the filtered air to be rapidly discharged to the filter outlet.
The allowable moisture content of upstream air is up to PPm.
Moisture is removed by 100%, and the residual content of oil mist reaches 1PPm.
Pre-filter and post-filter of adsorption type drier; pre-filter of the secondary filter; pre-filter of pneumatic tool and motor cylinder; and the main pipeline filter for protecting the automatic control system and air system
HA-class micro oil mist filter
Internal support screw rod stabilizes the filter element and protects it from vibration.
Internal elastic sponge layer is capable of pre-filtering, and the micro glass fiber, which is specially designed and subject to particular density/diameter/surface treatment, can remove solid particles of 0.01μm.
External sponge layer can absorb and discharge oil mist.
Oil mist is removed by 99.99%, and the residual content of oil mist reaches 0.01PPm.
Providing grease-free compressed air for precision instruments, spray painting, foodstuff, drugs and electronic manufacturing industries. Greased air compressor fitted with C, T, A-class filters may substitute grease-free air compressor, ensuring easy maintenance.
HI-class ultra high-efficiency degreasing filter
Internal support screw rod stabilizes the filter element and protects it from vibration.
Film-coated enclosed-type foam sleeve is adopted for pre-filtration and air flow dispersion.
Special design of multi-layer matrix complex fiber, capable of removing solid particles and grains of 0.01μm.
Residual moisture content of oil mist is 0.003PPm.
Film-coated enclosed-type foam sleeve.
Grease-free air supply for key applications, and the applications where air flow contacts the products. Conveying and mixing of air-related products, manufacturing of electronic elements, and nitrogen replacement; Pre-filters and post-filters;
HH-class degreasing / deodorizing ultra fine filter
Internal support screw rod stabilizes the filter element and protects it from vibration.
Fine active carbon layer can remove oil mist and hydrocarbon compounds by 95%.
Specially patented fiber layer can remove finer particles and residual oil mist.
Micro glass fiber can remove solid particles of 0.01μm, and the multi-hole external sponge can prevent the fiber filter material from being washed away. The residual 0.003PPm oil gas is free of any odor.
Air supply for conveying, mixing, brewing and fermentation of foodstuff and medicine manufacturing industries, air supply for breathing and diving protection, removal of odor in working environment.

II. Configuration and Installation
To ensure the filtering apparatus achieve the anticipated effects, correct configuration and installation are extremely important in addition to guaranteed quality of products.
1. Standard Pipeline for the Filters
A complete set of compressed air purification system is composed of several equipment and relevant filters. To ensure easy operation and maintenance, each filter shall be installed as per the standard pipelines shown in Fig. 3. Items 3 and 4 as shown in the figure are the ON/OFF valves for upstream and downstream of the air supply pipeline, which shall be turned on when the filter works normally and shall be turned off prior to maintenance. Valve 5 is fitted in the air-supply branch and shall be turned off when the filter works normally and turned off prior to maintenance; it alarms automatically once pressure drop of air inlet/out exceeds a certain value to prompt the operator to check the filtration capacity of filter elements; it may also be substituted by fitting a manometer with buffer tube in the inlet/outlet pipeline. Item 2 is a sampling valve fitted in the air-supply pipeline and is designed for sampling prior to determining the degree of purification of the air supply. Note: Piping shown in the figure shall be installed by user.

Fig. 3 Standard Pipeline for Filters
2. Basic Configuration/Installation Pattern of the Filter
HC-class filters are usually installed in the upstream pipeline composed of air compressor (1), after cooler (2) and air tank (3) as per the pattern shown in Fig. 4 to trap tmost of the moisture content, oil mist and dust particles of 3μm or greater contained in the upstream air channel, so that functions of purification and drying of the freezingdrier may be brought into full play. HT-class filter, HA-class filter and HF-class filter shall be connected in series in the downstream air channel after the freeze drier, and the air channel requiring removal of peculiar smell shall be additionally equipped with HH filter so that the filter contents of oil, water and dust of the downstream air may reach the required high purity.

1 - air compressor 2 - after cooler 3- air tank 4 – HC-class filter 5 - freeze drier
6 - HT-class filter 7 - HA-class filter. 8 - HF-class filter 9 - HH-class filter
3. Other Configuration/Installation Patterns of the Filters
The above-mentioned configuration pattern may be altered according to the circumstances as per user’s different requirements for air supply purification. For instance, when 3-stage HC, HT and HA filters are directly connected in series for the upstream air supply from the air tank, most of moisture, oil mist and dust particles contained in the air supply may be removed, satisfying the ordinary applications that require not so high purification of air supply. Some production processes, such as production of lens and integrated circuits, may require hyper-normal purification and dryness of air supply; for such applications, adsorption type drier may be additionally fitted after the freeze drier so that the air supply may meet the nearly ideal requirements for moisture free, grease free, and dust free purification and dryness.

III. Selection and Maintenance Requirements
1. Service conditions for the product (air delivery pipeline must be kept clean prior to installation of the filters)
Working pressure: 0.4MPa-1.0MPa (or customized when lower than 3.5MPa)
Operating temperature: ≤50℃
Supply air shall be free of corrosive elements
Compress air throughput capacity: 1m3/min- 300m3/min
If input pressure is not standard pressure for operating mode, actual throughput capacity of filter element may vary; in such a case, actual air flow shall be divided by the correction coefficient given in Table 2, and select the value as per the obtained result.
Table (2)
Pressure (MPa)
0.1
0.2
0.3
0.5
0.7
0.9
1.1
1.3
1.5
Coefficient (Φ)
0.38
0.53
0.65
0.85
1.0
1.13
1.25
1.36
1.46
2. Since liquid load-carrying abilities of filter elements of different types are different, filters shall be selected and installed strictly as per the sequence namely HC – HT - HA - HF – HH, and they must not be converted or mismatched; otherwise, not only the expected filtration effect may not be achieved, but also the filter elements may be prematurely damaged.
3. As a pressure vessel, filter housing is designed and manufactured as per the above-mentioned working pressures; it shall work within the range of allowable pressure indicated in the name plate; no over-pressure ultra-temperature operation is allowed.
4. Filter element is a critical component of a filter; when it works, it shall be regularly checked for pressure drop of inlet/outlet air. The initial-stage pressure drop of this product series is about 0.01Mpa ~ 0.02MPa (each piece). Along with the increase in service time, the pressure drop of filter element may gradually increase. When pressure drop reaches 0.07MPa, the filter element is already jammed with filth and shall be replaced in time, and it must not be subject to operation when the pressure drop gets too great. To replace a new filter element, the middle long screw rod shall be tightened, and the upper-end seal ring shall be checked for good condition. To replace HA type, HF type or HH type filter elements, do not directly grip the foam layer of the filter element by hand. Specific procedures for replacement of a filter element: a. Discharge completely the compressed air from vessel; b. Unscrew the fastening parts of vessel flange, and open the filter housing cartridge; c. Unscrew the drag-link nut of filter element, and remove the used filter element; d. Fix a new filter element, and replace the sealing members if they lose efficiency; c. Install the cartridge properly.
5. The above-mentioned operating conditions shall be abided by strictly. The service life of this series of HC, HT and HA filter elements may reach 8000 hours or higher, and the working life of HH-type filter element is 2500 hours (the working life is counted when pressure drop of single filter element reaches 0.07MPa).

IV. Troubleshooting
Fault condition
Cause
Corrective action
Sudden reduction of air flow
1. End cap is not tightened
Screw up the end cap
2. Piping valve is not opened
Open the valve
3. Air inlet pressure is low
Find out the cause, and raise air inlet pressure
4. Air leaks from O-ring
Replace it
5. Air leaks from piping
Repair the piping
Pressure drop increases
1. Filter element is jammed or amount of adsorption gets high
Replace the filter element
2. Filter element is aged
Replace the filter element
3. Load of air-inlet foreign substance is too high
Conduct pretreatment
4. Water is accumulated inside the filter cartridge
Find out the cause, and remove the accumulated water
5. Automatic drain trap malfunctions
Adjust, repair, or replace the drain trap
6. Filter is installed with poor levelness
Reinstall it
Filtration effect is poor
1. Inlet air is not pretreated
Install one more pre-filter
2. Filter element is aged
Replace the filter element
3. Air contains chemical substances that the filter element can not absorbed
Conduct pretreatment as per specific condition
4. Flow exceeds the rating value
Replace the old with a filter allowing higher flow
5. Air flow is short-circuited inside the filter
Find out the cause and solve it accordlingly.
6. Fastening screws of the filter element are not tightened
Tighten the filter element
7. Inlet and outlet of the filter are c