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SENOTAY ENGINEERING & AFTER-SALES SUPPORT
Whether you are specifying new equipment, commissioning a recent installation, optimising a running system, or troubleshooting a fault — Senotay's technical team is here to help at every stage of your equipment's life. This page is your complete technical resource for everything Senotay.
SUPPORT ACROSS THE FULL EQUIPMENT LIFECYCLE
Pre-Sales Engineering | Installation Support | Commissioning Assistance | Operational Guidance | Maintenance Advice | Emergency Response |
OUR TECHNICAL SUPPORT PHILOSOPHY
At Senotay, the sale of equipment is the beginning of our relationship with a customer — not the end. Industrial dust collection systems are long-lived, critical assets. When they perform well, your facility meets its environmental obligations, your production continues uninterrupted, and your operating costs are predictable. When they underperform, the consequences range from compliance risk to unplanned downtime to premature equipment replacement.
Our technical support service is designed to prevent those consequences — by giving you access to the engineering expertise behind our products, at every stage of the equipment lifecycle. From initial sizing calculations before you order, through installation and commissioning, to optimisation, maintenance, and fault resolution years down the line, our team is available, knowledgeable, and genuinely invested in the performance of the equipment we make.
The sections below cover each major area of technical support in detail. If your question is not answered here, the fastest route to an answer is always a WhatsApp message or email to our team directly.
WHAT WE CAN HELP YOU WITH
The following table maps every major support topic to what we provide and how to access it.
Support Topic | When You Need It | What We Provide | How to Access |
Equipment Selection & Sizing | Before purchase — planning a new installation or upgrade | Gas volume calculations, filter sizing, bag media selection, housing material recommendations, compressed air demand estimates, layout and footprint guidance | Email or WhatsApp with process data; video call with engineer for complex projects |
Technical Drawings & Documentation | Pre-order engineering review; civil and structural design; installation planning | General arrangement drawings, foundation load data, duct connection dimensions, electrical schematics, parts lists, operation & maintenance manuals | Provided with all orders; additional drawings available on request |
Installation Guidance | During physical installation of equipment at site | Step-by-step installation sequence, lifting and rigging instructions, torque specifications, bag installation procedure, pulse valve and pipe assembly guidance | Installation manual supplied with equipment; remote video call support available; on-site visit can be arranged |
Commissioning & Start-Up | First time the equipment is powered up and run | Pre-start checklist, compressed air system setup, pulse controller programming, initial differential pressure baseline, performance verification procedure | Commissioning guide supplied; remote video call support; on-site commissioning service available |
Operational Optimisation | Equipment running but not achieving expected performance | Pulse timer optimisation, compressed air pressure review, inlet velocity check, bag selection review, hopper discharge verification, energy consumption reduction advice | Email or WhatsApp with operating data and readings; remote analysis and recommendations |
Maintenance Planning | Ongoing — setting up a maintenance schedule or preparing for a shutdown | Recommended maintenance intervals, inspection checklists, bag replacement procedures, solenoid valve servicing guide, rotary valve maintenance, lubrication schedule | Maintenance schedule in O&M manual; additional planning support via email |
Fault Diagnosis | Equipment not functioning correctly — high pressure drop, dust breakthrough, cleaning failure | Remote fault diagnosis based on symptoms and readings; step-by-step investigation procedure; corrective action recommendations | WhatsApp or phone for urgent faults; email with photos/videos for detailed diagnosis |
Filter Bag & Spare Parts Identification | Ordering replacement bags or components | Identification of correct replacement parts from equipment model number or dimensions; compatibility confirmation for non-Senotay equipment | Email or WhatsApp — provide model number or send photos of existing parts |
Upgrade & Renovation Engineering | Ageing equipment underperforming; tightening emission limits; capacity expansion needed | Assessment of existing system, upgrade options, performance improvement estimates, cost-benefit analysis, engineering proposal for renovation or replacement | Email with current system details and performance issues; site visit for complex renovations |
BEFORE YOU BUY
Correct equipment selection is the single most important factor in long-term system performance. An undersized filter will struggle from day one. An incorrectly specified filter bag material will fail prematurely. A system designed without understanding the dust characteristics will never meet its emission target.
Our pre-sales engineering support is free and unlimited. Before you commit to an order, we want to be certain that what we are proposing will work — because our reputation depends on it, and your facility's compliance depends on it.
• Your industry and the specific process generating the dust — the more detail the better
• Gas or air volume in m³/h — or the process parameters we need to calculate it
• Inlet gas temperature in °C — maximum continuous and peak values
• Dust type and, if known, particle size distribution and bulk density
• Required outlet emission limit in mg/m³ — from your environmental permit if available
• Site conditions — indoor or outdoor installation, local climate, altitude above sea level
• Any special conditions — combustible dust, corrosive gases, moisture, space constraints
• Your timeline and delivery location
You do not need all of this information to start a conversation. Share what you have and we will work with you to fill in the gaps. In most cases we can provide a preliminary recommendation within 24–48 hours of receiving your initial enquiry.
ENGINEERING REFERENCE
Understanding the key parameters used to size a dust collection system helps you provide the right information and evaluate the proposals you receive. The table below explains each critical parameter, why it matters, and the consequence of getting it wrong.
Parameter | Unit | What It Means & How to Obtain It | Consequence of Incorrect Specification |
Gas Volume (Q) | m³/h | Total airflow from process to be treated — measure or calculate from process data. This is the single most important sizing parameter. | Undersizing causes high face velocity, rapid bag clogging, and short bag life |
Inlet Temperature (T) | °C | Maximum continuous gas temperature at filter inlet. Determines filter bag material selection and housing specification. | Exceeding bag rated temperature causes premature bag failure and potential fire risk |
Inlet Dust Concentration (C) | g/m³ | Mass of dust per unit volume of gas at filter inlet. High concentrations require cyclone pre-separation or increased filter area. | Very high concentrations can overwhelm cleaning system; pre-separator recommended above 20 g/m³ |
Dust Particle Size (d) | µm (microns) | Median particle diameter (d50) and the proportion of sub-micron particles. Fine dust requires higher-efficiency media. | Sub-micron particles may require membrane (PTFE) filter bags to achieve strict outlet limits |
Gas Moisture Content | %RH or dew point °C | Moisture causes dust to stick to bags and resist cleaning. Operating above the dew point is critical. | If gas temperature approaches dew point, insulate ductwork and housing; consider heated inlet |
Required Outlet Emission | mg/m³ | The environmental permit limit for particulate matter at the stack or exhaust point. | Determines whether standard fabric, membrane bags, or ESP technology is required |
Air-to-Cloth Ratio (A/C) | m³/m²·min | Gas volume divided by total filter bag area. Standard range: 0.8–1.5 m/min for moderate duty; 0.5–0.9 m/min for fine or difficult dust. | High A/C ratio causes rapid clogging; low A/C ratio increases equipment size and cost — balance is key |
Compressed Air Supply | MPa and m³/min | Pulse-jet cleaning requires 0.5–0.7 MPa clean, dry air. Volume demand depends on number of pulse valves and pulse frequency. | Insufficient air volume or pressure causes ineffective cleaning and rising differential pressure |
Static Pressure (ΔP) | Pa | Pressure loss across the filter system. Design target typically 800–1,500 Pa. Determines fan/blower specification. | Higher than designed ΔP indicates clogging or undersized filter; lower may indicate bag failure |
If any of these parameters are uncertain for your application, our engineers can help you estimate or measure them. Providing accurate data leads to better-sized equipment, lower operating costs, and longer service life.
GETTING IT RIGHT FROM DAY ONE
The quality of an installation determines the performance of the equipment for its entire service life. A well-installed system with correctly tensioned bags, properly set pulse timers, and a leak-free housing will outperform an identical unit that was carelessly installed. Our installation and commissioning guidance is designed to help you get it right the first time.
1. Foundation — Confirm foundations are level, load-bearing, and dimensionally correct per the foundation drawing supplied
2. Compressed Air — Confirm compressed air supply is available at the filter location at 0.5–0.7 MPa with adequate volume capacity
3. Electrical — Confirm electrical supply is available for control panel, motor, and solenoid valves
4. Ducting — Confirm duct connections are fabricated to the dimensions shown on the general arrangement drawing
5. Equipment Receipt — Confirm all equipment components have been received and visually checked for transport damage before assembly begins
Filter bag installation is one of the most common sources of early performance problems. Follow these steps carefully:
6. Tube Sheet Preparation — Clean the tube sheet thoroughly before fitting bags — dust or debris under the bag collar causes air bypass and false readings
7. Cage Inspection — Inspect each bag cage for bent wires, broken welds, or sharp edges before installing — a damaged cage will destroy a new bag within days
8. Assembly Sequence — Fit the bag cage into the bag first, then lower the combined assembly into the tube plate aperture — never force a cage into an already-installed bag
9. Collar Seating — Snap the bag collar firmly and evenly into the tube plate aperture — an improperly seated collar is the most common cause of dust bypass
10. Leak Test — After fitting all bags, seal the top access cover and conduct an air-pressure leak test before first start-up
11. Compressed Air — Open the compressed air supply isolation valve and confirm pressure at the collector is within specification
12. Pulse Controller — Set the pulse controller to the initial recommended settings: pulse duration 0.1 s, pulse interval 10–15 s per row
13. System Start-Up — Start the process fan or blower and bring the system to operating conditions slowly — avoid sudden full-load start-up on a new system
14. ΔP Monitoring — Monitor differential pressure for the first 30 minutes of operation — a new bag system will show a rising ΔP as the initial dust cake forms, then stabilise
15. Cleaning Verification — After 2 hours of operation, confirm that pulse cleaning is reducing ΔP effectively and that dust is discharging from the hopper
16. Baseline Recording — Record the stabilised operating ΔP as the baseline for future monitoring — this is your reference for normal operation
17. 24-Hour Inspection — Conduct a visual inspection via the access door after 24 hours of operation — check bag condition and confirm no dust on the clean side of the tube sheet
KEEP YOUR SYSTEM AT PEAK PERFORMANCE
Preventive maintenance is the most cost-effective way to manage a dust collection system. The schedule below is based on Senotay's engineering recommendations for Pulse Bag Filter systems under normal industrial operating conditions. Adjust frequencies based on your actual operating hours, dust loading, and environmental conditions.
Frequency | Task | Notes & Action Criteria |
Daily | Check differential pressure across filter bags | Should be within normal operating range (typically 800–1500 Pa). Rising trend indicates cleaning issue or bag clogging. |
Daily | Check compressed air supply pressure at dust collector | Must be 0.5–0.7 MPa (5–7 bar). Low pressure causes ineffective pulse cleaning. |
Daily | Confirm hopper dust discharge is operating | Check rotary unloader or screw conveyor is running and dust is being discharged. Blocked hopper causes rapid pressure rise. |
Daily | Listen for pulse valve operation | Each solenoid valve should fire audibly in sequence. Silence on one or more valves indicates valve or electrical fault. |
Weekly | Inspect compressed air line connections for leaks | Air leaks reduce pulse cleaning effectiveness and waste energy. Repair any leaks found. |
Weekly | Check control panel for fault indicators or alarm signals | Address any active alarms before they develop into equipment damage. |
Weekly | Inspect exterior of housing for damage, corrosion, or fastener loss | Particularly important for outdoor installations. Address any findings promptly. |
Monthly | Open access door and inspect filter bags visually | Look for holes (indicated by dust on clean side of bags), excessive stiffness, discolouration, or physical damage. Replace any failed bags. |
Monthly | Inspect bag cage condition | Check for bent wires, broken welds, or corrosion that could damage bag fabric. Replace damaged cages. |
Monthly | Check and lubricate rotary unloader (star valve) bearings | Follow manufacturer's lubrication schedule. Seized bearings cause hopper blockage. |
Monthly | Test each solenoid valve individually | Manually trigger each valve and confirm it fires and resets correctly. Replace any valve that fails to operate. |
Monthly | Check pulse controller timer settings | Verify pulse duration and interval against recommended settings. Adjust if differential pressure trends have changed. |
3-Monthly | Clean inside surfaces of filter housing | Remove any accumulated dust from housing walls, tube sheet, and hopper sides. Prevents bridging and false readings. |
3-Monthly | Inspect and service compressed air filter-regulator unit | Drain water trap, replace filter element if blocked. Contaminated air damages solenoid valves and filter bags. |
3-Monthly | Check all duct connections and flanged joints for leaks | Air inleakage bypasses the filter. Duct outleakage releases untreated dust. Seal any leaks found. |
6-Monthly | Full internal inspection of all filter bags | Remove bags if necessary for thorough inspection. Replace any bag showing >20% area with thin spots, holes, or hardened fabric. |
6-Monthly | Check and re-torque all external fasteners and flange bolts | Thermal cycling and vibration can loosen fixings over time, leading to air leaks. |
6-Monthly | Inspect pulse pipes and nozzle venturis for blockage or wear | Clear any blockages. Worn venturis reduce cleaning pulse energy — replace if damaged. |
Annually | Full bag replacement assessment — replace all bags if service life exceeded | Do not wait for bag failure. Proactive replacement prevents outlet emission exceedance and downstream contamination. |
Annually | Calibrate differential pressure gauge or sensor | Inaccurate readings mislead operators. Calibrate against known reference or replace if drift is confirmed. |
Annually | Check housing structural integrity — welds, supports, access door seals | Particularly important in corrosive or high-vibration environments. Address any structural concerns before they worsen. |
Note: This schedule is a general guide. Consult your equipment-specific Operation & Maintenance Manual for any variations applicable to your model. Contact our technical team if you are unsure about any maintenance task.
FILTER BAG TECHNICAL REFERENCE
Filter bags are the heart of any pulse bag filter system — and the component most directly responsible for both filtration performance and operating cost. Correct bag selection and timely replacement are the two most important factors in maintaining system performance.
• Polyester (PET) — the standard choice for most applications below 130°C with non-aggressive dust. Good mechanical strength, easy to clean, cost-effective.
• Polypropylene (PP) — for applications with mild acid or alkali gases; not suitable for temperatures above 90°C.
• Nomex (Meta-Aramid) — for continuous temperatures up to 200°C. Good chemical resistance. Used in cement kilns, asphalt plants, and moderate-temperature boiler applications.
• PPS (Polyphenylene Sulphide) — excellent resistance to acid and alkali gases; rated to 190°C continuous. Preferred for flue gas desulphurisation applications.
• Fibreglass — for high-temperature applications up to 260°C continuous. Used in steel, glass, and high-temperature power applications. Brittle — handle carefully during installation.
• PTFE Membrane Laminate — applied over any base fabric to give sub-micron surface filtration. Dramatically improves cleaning efficiency for fine, sticky, or hygroscopic dust. Increases bag cost but extends service life in difficult applications.
• Anti-Static (AS) — any of the above fabrics with conductive fibres woven in to dissipate static charge. Mandatory for explosive or combustible dust applications.
• Any bag with a confirmed hole or tear — replace immediately to prevent dust breakthrough to outlet
• Bags showing widespread thin spots or abrasion damage — replace the affected row or full set proactively
• Bags that remain stiff or rigid after cleaning — the fabric structure has been compromised by moisture, chemical attack, or thermal damage
• Bags that consistently fail to clean despite correct pulse settings — the fabric pores are permanently blinded
• After reaching the manufacturer's recommended service interval — even if no visible damage is present
To order the correct replacement bags, provide: equipment model number (from the nameplate on the housing), bag diameter (mm), bag length (mm), bag top fitting type (snap-in collar, sewn-in ring, or other), and required filter media type and any special requirements (anti-static, membrane, high-temperature). If you are not sure of any of these details, send us a photo of the existing bag and housing nameplate via WhatsApp and we will identify the correct replacement.
GETTING THE RIGHT LEVEL OF SUPPORT
Not every issue requires the same response. Use the table below to identify the right level of support for your situation and know exactly what to do and what to expect.
Support Level | Type of Issue | Examples | What to Do | Response |
Level 1 | Routine operational question or minor adjustment needed | Pulse timer setting, differential pressure reading interpretation, filter bag identification, basic maintenance question | Consult the Operation & Maintenance Manual supplied with your equipment. If the answer is not there, send an email to info@senotay.com. | Within 24 hours by email |
Level 2 | Persistent operational fault, performance below specification | Rising differential pressure not responding to cleaning, outlet emissions exceeding permit, hopper discharge problems, solenoid valve issues | Send an email or WhatsApp message to info@senotay.com / +8615831871808 with: differential pressure readings, compressed air pressure, a description of the fault, and photos or video if possible. | Within 4 hours via WhatsApp; same-day email response on working days |
Level 3 | Urgent fault causing shutdown or emissions non-compliance | Filter bag failure causing visible dust at outlet, complete cleaning system failure, housing damage, hopper fire, control system failure | Call or WhatsApp +86-158-318-71808 immediately. For safety-critical issues (fire, structural damage), follow your site emergency procedures first, then contact us. Do not restart equipment until the fault is identified and rectified. | Immediate phone/WhatsApp response; engineer available for video call within 1 hour; on-site visit arranged if required |
Level 4 | Equipment damage requiring on-site engineering support | Major structural damage, catastrophic bag failure requiring full replacement, control system replacement, complete system shutdown for maintenance | Contact us via phone or WhatsApp to agree scope of on-site support. Provide equipment model, fault description, and site location. We will confirm engineer availability and mobilisation timescale. | On-site support arranged as quickly as possible — typically within 3–10 working days depending on location |
"No question is too basic and no fault is too complex. If you are not sure what level of support you need, call or WhatsApp us and we will help you work it out."
BEFORE YOU CALL OR MESSAGE
Having the right information ready when you contact us means we can help you faster and more accurately. For operational and fault issues, try to have the following available:
• Equipment model number — found on the nameplate attached to the filter housing
• Senotay order number or project reference — if known
• Current differential pressure reading across the filter bags (in Pa or mmWG)
• Compressed air supply pressure at the filter (in bar or MPa)
• A description of when the problem started and whether anything changed at that time
• Current gas volume and temperature at the filter inlet (if monitored)
• Photos or video of the fault, abnormal readings, or visible damage — send via WhatsApp for fastest response
• Your outlet emission readings if you have a continuous emissions monitor (CEMS)
For pre-sales and equipment selection enquiries, refer to the sizing parameters table above and share as many of those data points as you have available.
REACH OUR TECHNICAL TEAM
Our engineering and after-sales support team is available through all of the following channels. WhatsApp is recommended for fast communication, sharing photos, and international enquiries across time zones.
• Email: info@senotay.com — for all technical enquiries, non-urgent fault reports, and documentation requests
• Phone: +86-158-318-71808 — direct line during business hours China Standard Time (UTC+8)
• WhatsApp: +86-158-318-71808 / +8615831871808 — 24/7 for urgent operational emergencies
• Address: Botou Industrial Development Zone, Cangzhou City, Hebei Province, China — on-site visits by appointment
Response times: Email enquiries are answered within 24 hours on working days. WhatsApp messages during business hours are answered within 4 hours. For genuine operational emergencies — equipment down, emissions out of compliance — call or WhatsApp us immediately for same-hour response.
