Resin Trap Manual
Table of Contents
Manual Overview
I. Working Principle
Based on the physical interception mechanism, it captures resin particles lost from the water stream via a built-in precision filter element (screen / basket / cartridge). The core process is as follows:
- Installed at the outlet of equipment like ion exchangers or mixed beds, water flows in following the direction indicator.
- The filter element (aperture 5-100μm, 1/2 to 1/3 of the minimum resin particle size) intercepts resin particles (size 0.3-1.2mm).
- Clean water flows out from the outlet, while the trapped resin accumulates on the surface of the filter medium.
- Captured resin can be discharged via manual blowdown, disassembly for cleaning, or automatic differential pressure backwash (available on specific models).
II. Core Advantages
- High Interception Efficiency (Capture rate ≥99%), preventing resin leakage from affecting downstream equipment.
- Easy Maintenance, most models support removable filter baskets/cartridges for cleaning, requiring no prolonged shutdown.
- Wide Compatibility, optional materials include Stainless Steel (304/316L), PP, etc., resistant to acid and alkali corrosion.
- Economical Operation, long cleaning cycles (only requires weekly inspection), no consumable parts.
III. Application Scope
Primarily used in water treatment systems requiring high water quality, including:
- Power Industry: Boiler feed water, condensate polishing (protects turbines).
- Electronics Industry: Ultrapure water preparation (Semiconductor, PV, prevents resin from contaminating chips).
- Pharmaceutical Industry: Purified Water, Water for Injection preparation (ensures water purity for pharmaceuticals).
- Chemical Industry: Ion exchange demineralization, softening water systems (protects reactors, pipelines).
- Food & Beverage Industry: Drinking water, process water treatment (avoids resin residue).
IV. Operating Procedures
(I) Installation
- Location Selection: Install on vertical or horizontal straight pipe sections at the ion exchanger outlet pipe, away from elbows and valves, ensuring easy observation, operation, and future maintenance.
- Flow Direction: Strictly follow the indicated flow direction on the unit. For basket types, ensure the filter basket is fully immersed in the water flow.
- Piping Configuration: A bypass valve must be installed to facilitate cleaning and maintenance without interrupting the entire water treatment system.
- Installation Verification: After securing the unit, check the levelness/verticality of the inlet/outlet flanges. Clean internal pipe debris to ensure leak-free sealed connections.
(II) Start-up / Shutdown
- Start-up Procedure:
- Slowly open the inlet valve to gradually vent air from the system (prevents air binding affecting filtration).
- Observe the differential pressure gauge; initial differential pressure should be <0.05MPa.
- After confirming no leaks at all connections, the unit can enter normal operation.
- Shutdown Procedure:
- First close the inlet and outlet valves, then open the blowdown valve to release pressure.
- Wait for the system to be fully depressurized (differential pressure gauge reads zero) before performing maintenance or cleaning.
(III) Routine Operation
- Daily Monitoring:
- Check inlet/outlet differential pressure; normal operating differential pressure should be ≤0.3MPa.
- Inspect the unit's housing and flange connections for leaks.
- Observe the amount of trapped resin through the sight glass to determine if cleaning is needed.
- Blowdown Timing & Method:
- Perform blowdown immediately when the differential pressure increases by 0.1-0.2MPa from the initial value.
- Open the blowdown valve, flush for 3-5 minutes, and close it once the discharged water runs clear and is free of resin particles.
- Prohibited Actions:
- Do not use for water temperatures >50°C (unless specified for custom high-temperature materials).
- Do not use with highly corrosive media incompatible with the unit's materials (e.g., concentrated acids/alkalis; confirm material compatibility beforehand).
V. Maintenance
(I) Periodic Maintenance (Fixed Intervals)
- Cleaning Cycle & Method:
- Disassemble and clean at least once per month (reduce cycle to every 2 weeks if significant resin breakage occurs).
- Rinse the screen/basket with clean water. Do not use steel wool, hard brushes, or other abrasive items to scrub the filter pores (prevents damage leading to resin leakage).
- After cleaning, check that the filter element is unobstructed before reinstalling.
- Filter Element Inspection Focus:
- During each cleaning, carefully inspect the screen/basket for cracks, holes, or deformation.
- If damage is found, replace the filter element with an identical specification immediately. Continued use is strictly prohibited.
- Material Maintenance:
- Carbon Steel Rubber-Lined Equipment: Check for bulging or detachment of the rubber lining during each maintenance to avoid base material corrosion.
- Stainless Steel Equipment: Wipe the exterior shell regularly with a neutral cleaner to prevent rust.
- Backwash Operation (For models with backwash function):
- Perform backwash quarterly. Backwash pressure should be ≤0.3MPa, duration 5-10 minutes.
- After backwashing, drain until the water runs clear before resuming normal filtration.
(II) Troubleshooting (Emergency Handling)
| Fault Phenomenon | Possible Causes | Actions & Handling Methods |
| ---------------- | --------------- | -------------------------- |
| Rapid inlet/outlet pressure drop increase | Filter screen clogging, massive resin breakage upstream | 1. Stop immediately, disassemble and clean the screen.2. Check if the upstream ion exchanger distributor is damaged (repair if necessary). |
| Abnormal increase in trapped resin volume | Resin aging, excessive backwash intensity in ion exchanger | 1. Replace aged upstream resin.2. Adjust backwash parameters (reduce backwash flow rate/duration). |
| Resin particles in outlet water | Filter screen damaged, poor connection seal during installation | 1. Stop and replace the filter screen.2. Re-tighten connection bolts, replace sealing gaskets. |
| Flange / Connection Leakage | Sealing gasket aged, bolts unevenly tightened | 1. Replace gasket after shutdown and pressure release.2. Re-tighten bolts evenly in a diagonal sequence. |
VI. Safety Precautions
- Personnel Protection: Wear safety helmets and acid/alkali-resistant gloves during operation/maintenance; add protective goggles when handling corrosive media. Do not disassemble flanges or sight glasses while the unit is operating.
- Pressure Safety: Monitor the differential pressure gauge; do not exceed the nameplate rating (typically ≤0.6MPa). Open blowdown valves slowly during depressurization to prevent water hammer.
- Electrical & Environmental: Check grounding of electrical components regularly to prevent electric shock. Resin wastewater must meet standards before discharge.
- Emergency Response: For media leakage, immediately stop the unit, close valves, and treat with neutralizing agents. If personnel contact corrosive media, flush with clean water for 15 minutes and seek medical attention. Post emergency contact information near the unit.
This section provides comprehensive documentation for all products in the Resin Trap category. Please select a specific product below to view its detailed manual.
Available Products
SUS316-Resin Trap DN250
Resin Trap DN80
SUS316-Resin catcher DN100
SUS304-Resin catcher DN150
SUS316-Resin catcher DN150
SUS304-Resin catcher DN100
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