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SENOTAY — HEBEI OUTAI ENVIRONMENTAL PROTECTION EQUIPMENT CO., LTD.
Everything you need to know about Senotay products, ordering, installation, operation, and after-sales support — answered clearly. Can't find what you need? Contact us directly and our technical team will respond within 24 hours.
CONTENTS
Use the table below to navigate to the section most relevant to your question.
# | Category | What It Covers |
01 | Products & Equipment | General questions about what we make and how it works |
02 | Ordering & Customisation | How to buy, minimum orders, lead times, and custom specs |
03 | Shipping & Export | Delivery, packaging, Incoterms, and international trade |
04 | Installation & Commissioning | Site requirements, installation support, and commissioning |
05 | Operation & Maintenance | Running your equipment correctly for maximum performance |
06 | Troubleshooting | Diagnosing and resolving common faults and issues |
07 | Spare Parts & After-Sales | Replacement parts, warranty, and ongoing support |
CATEGORY 01
Q: What types of dust removal equipment does Senotay manufacture?
A: Our product range covers the full spectrum of industrial dust removal and air purification: Pulse Jet Bag Filters (standard, high-temperature, anti-static), Electrostatic Precipitators (ESP), Cyclone Dust Collectors, Wet Dust Collectors, Filter Cartridge Collectors, and VOC Purifiers. We also manufacture a complete range of accessories including filter bags, bag cages, pulse solenoid valves, air filter-regulators, screw conveyors, star-shaped rotary unloaders, industrial blowers, and motor reducers.
Q: What filtration efficiency can Senotay equipment achieve?
A: Our Pulse Bag Filters achieve particulate capture efficiency of up to 99.9%, making them suitable for compliance with even the strictest environmental emission standards. Electrostatic Precipitators can achieve outlet concentrations below 10 mg/m³ for fine particulate applications. Exact efficiency depends on dust type, particle size distribution, gas volume, and filter media selection — our engineers will confirm achievable efficiency for your specific application.
Q: What gas volumes can your dust collectors handle?
A: Our equipment is designed and manufactured across a wide capacity range. Single Pulse Bag Filter units are available from under 1,000 m³/h up to 500,000 m³/h. For larger requirements, multiple units can be combined in parallel to handle over 1,000,000 m³/h. We size equipment specifically for your process — there is no standard 'off-the-shelf' limit.
Q: What is the maximum operating temperature for your filter bags and equipment?
A: This depends on the filter media selected. Standard polyester bags are rated to 130°C continuous. Nomex (meta-aramid) bags handle up to 200°C. PPS (polyphenylene sulphide) bags are suitable to 190°C with brief excursions to 200°C. Fibreglass bags can operate continuously at 260°C, with PTFE-laminated fibreglass extending to 280°C+. Our housing and structural components are designed to match the rated operating temperature of the chosen filter media.
Q: Can your equipment handle explosive or combustible dust?
A: Yes. We manufacture anti-static Pulse Bag Filter variants specifically for combustible and potentially explosive dust applications. These units incorporate anti-static filter bag material, earthing provisions, and can be fitted with explosion-relief panels or venting designed to relevant standards. We recommend providing full dust explosion characteristics (Kst value, MIE, MEC) when enquiring for these applications so we can specify the correct safety measures.
Q: What is the difference between a Pulse Bag Filter and an Electrostatic Precipitator?
A: A Pulse Bag Filter (baghouse) captures dust on fabric filter bags and removes it by periodically blasting the bags with pulses of compressed air. It is highly efficient across a wide range of particle sizes and dust types, and is the most versatile option for most industrial applications. An Electrostatic Precipitator (ESP) charges dust particles electrostatically and collects them on grounded plates. ESPs are particularly effective for very fine or sticky dust at high gas volumes, and are widely used in power generation and cement applications. The best choice depends on your dust type, gas conditions, and emission target — our engineers can advise.
Q: Do you manufacture filter bags separately from complete systems?
A: Yes. Filter bags, bag cages, pulse solenoid valves, and all other accessories are available as standalone products for replacement and maintenance purposes. We can supply filter bags to fit Senotay equipment as well as to fit other manufacturers' bag filter housings, provided you supply the relevant dimensions and specifications.
CATEGORY 02
Q: How do I place an order with Senotay?
A: Contact us via email at info@senotay.com, by phone at +86-158-318-71808, or via WhatsApp at +8615831871808. Describe your application — industry, dust type, gas volume, temperature, and emission target — and our sales and engineering team will respond with preliminary equipment recommendations and a quotation. For complex or custom projects, we may request additional process data or arrange a technical call with our engineers.
Q: Is there a minimum order quantity?
A: No. We accept orders for single units as well as large batch orders for multi-site projects. Whether you need one replacement filter bag or a complete dust collection system for a new plant, we can accommodate your requirement.
Q: Can Senotay manufacture equipment to custom specifications?
A: Yes — custom engineering is a core part of our business. We regularly design and manufacture equipment to non-standard dimensions, unusual material specifications, and special performance requirements. Common custom requirements include non-standard housing dimensions, specialist alloy materials for corrosive environments, modified inlet/outlet configurations, and integrated mounting frames. Provide your specification and we will confirm feasibility and pricing.
Q: What information do you need to produce a quotation?
A: For a Pulse Bag Filter or similar: gas volume (m³/h), inlet dust concentration (g/m³), dust type and particle size (if known), gas temperature (°C), required outlet emission limit (mg/m³), installation environment (indoor/outdoor, elevation, climate), and any special material or safety requirements. For filter bags or accessories: existing equipment dimensions, bag diameter, bag length, top/bottom fitting type, and operating temperature. The more detail you provide, the more accurate our quotation.
Q: What are your typical lead times?
A: Standard equipment: 2–4 weeks from order confirmation. Custom or large equipment: 4–8 weeks depending on complexity and fabrication requirements. Filter bags and accessories in stock: 3–7 days. We confirm lead times at the point of quotation and provide production milestone updates for larger orders. Urgent requirements can sometimes be accommodated — please discuss with our sales team.
Q: Do you offer OEM manufacturing or white-label products?
A: Yes. We supply OEM-manufactured equipment and accessories to other companies and distributors on a confidential basis. Please contact us directly to discuss OEM arrangements, minimum quantities, and pricing.
CATEGORY 03
Q: Do you export internationally? Which countries do you ship to?
A: Yes. Senotay ships to customers worldwide. We have established trade relationships across Asia, the Middle East, Africa, South America, Europe, and other regions. We handle all export documentation including commercial invoices, packing lists, certificates of origin, and any required inspection certificates.
Q: What Incoterms do you trade on?
A: We can trade on FOB (Qingdao or Tianjin), CIF, EXW, or DAP depending on customer preference. FOB is our most common export term. We can arrange freight forwarding, marine insurance, and customs clearance services on request. Please specify your preferred Incoterm when requesting a quotation.
Q: How is equipment packaged for export?
A: All export orders are packed for sea freight. Larger components such as filter housings and hoppers are typically shipped in open-top or flat-rack containers with steel crating and bracing. Smaller items, accessories, and filter bags are packed in wooden cases or cartons with moisture-protection lining. Equipment is labelled clearly with handling instructions and centre-of-gravity markings. We can arrange fumigation certification (ISPM-15) for wooden packaging on request.
Q: What are your payment terms?
A: Standard terms are 30% T/T deposit upon order confirmation, balance 70% T/T before shipment. For established customers and larger ongoing contracts, we can discuss alternative arrangements. We also accept L/C (Letter of Credit) at sight for qualifying orders.
Q: Can you provide a pro-forma invoice for import customs purposes?
A: Yes. We will issue a formal pro-forma invoice on request, including all information required for import customs declaration: HS codes, unit prices, total value, country of origin, and equipment description.
CATEGORY 04
Q: Does Senotay provide installation services?
A: Yes. Our Engineering and After-Sales Support team can provide on-site installation and commissioning services. For domestic (China) projects, this is a standard service. For international projects, we can arrange for engineers to travel to your site — costs and visa requirements are discussed as part of the project scope. Alternatively, we provide detailed installation manuals, drawings, and remote technical support for customers who prefer to use their own installation contractors.
Q: What site preparation is required before equipment arrives?
A: Requirements vary by equipment type and size. Generally: a level, load-bearing concrete base of specified dimensions; structural steelwork or support frames if the unit is elevated; compressed air supply (typically 0.5–0.7 MPa) for pulse-jet cleaning; power supply for control panels and motors; and ducting connections to the process inlet and clean-air outlet. We provide detailed civil and mechanical pre-installation drawings with every order.
Q: Do you provide operator training?
A: Yes. We provide operational and basic maintenance training as part of our commissioning service. Training covers system start-up and shutdown procedures, pulse cleaning system settings, routine daily and weekly checks, filter bag inspection and replacement, and initial fault diagnosis. Training can be delivered on-site or remotely via video call.
Q: What documentation is provided with the equipment?
A: Every order ships with: installation and assembly drawings, operation and maintenance manual, electrical wiring diagram (where applicable), parts list with component codes, filter bag installation instructions, pulse controller programming guide, and quality inspection certificate. Additional documentation such as material certificates, third-party test reports, or CE declarations can be provided on request.
CATEGORY 05
Q: How often should filter bags be replaced?
A: Filter bag service life depends on the dust type, gas conditions, cleaning intensity, and bag material. Under normal operating conditions with correctly specified bags, expect 2–4 years of service for polyester bags in moderate-temperature, non-abrasive applications. High-temperature, abrasive, or chemically aggressive conditions will reduce bag life. We recommend inspecting bags every 6 months and replacing them proactively before they fail, as a failed bag allows untreated dust to reach the outlet.
Q: What compressed air quality and pressure is required for pulse-jet cleaning?
A: The pulse-jet cleaning system requires clean, dry compressed air at 0.5–0.7 MPa (5–7 bar). Oil and moisture in the compressed air will contaminate and damage filter bags. We recommend fitting an air dryer and oil-water separator upstream of the dust collector's compressed air supply. Air consumption is typically 0.1–0.3 m³/min per 1,000 m³/h of filtered gas, depending on pulse frequency.
Q: How do I set the pulse cleaning timer correctly?
A: The pulse interval (time between cleaning pulses) and pulse duration (length of each blast) should be set based on the dust loading and resistance across the bags. Start with the settings recommended in the operating manual — typically a pulse duration of 0.1–0.15 seconds and an interval of 5–15 seconds per row of bags. If differential pressure rises continuously, reduce the interval. If bags are being over-cleaned, increase the interval. Our technical team can advise on optimal settings for your specific process.
Q: What routine maintenance should be performed on a Pulse Bag Filter?
A: Daily: check differential pressure reading; check compressed air pressure; inspect hopper discharge and confirm dust is flowing. Weekly: check solenoid valve operation (listen for each valve firing in sequence); check pulse pipe connections for leaks; inspect housing exterior for damage. Monthly: inspect filter bags via access door for signs of wear, holes, or clogging; check bag cage condition; check and lubricate rotary unloader bearings. Six-monthly: thorough internal inspection of all bags; replace any damaged bags; clean inside surfaces of housing.
Q: Can I operate the filter while bag replacement is taking place?
A: This depends on the unit configuration. Some Pulse Bag Filter designs allow individual rows of bags to be isolated for replacement while the remaining rows continue to operate (offline replacement). Standard single-chamber units require a full system shutdown for bag replacement. Check your equipment manual or contact us for guidance on your specific unit. We can advise on procedures to minimise production downtime during maintenance.
Q: How do I know if my filter bags need replacing?
A: Key indicators are: persistent high differential pressure despite active pulse cleaning; visible dust at the clean-air outlet (indicating bag failure); physical inspection showing holes, thin patches, or stiffened bag fabric that cannot be flexed; and exceeding the manufacturer's recommended service interval. When in doubt, replace — a failed bag has a disproportionate impact on outlet emissions and can contaminate downstream equipment.
CATEGORY 06
The table below covers the most common operational faults encountered with Pulse Bag Filter systems — including all faults originally documented by our engineering team, rewritten in clear, actionable language. For faults not listed here, contact our technical support team at info@senotay.com.
Fault / Symptom | Probable Cause | Recommended Action |
Filter bag wear — rubbing against housing | Bag cage misaligned or damaged; bag size incorrect for housing | Re-align or replace cage; verify bag dimensions against spec sheet |
Filter bag wear — dust abrasion (thinning below filter) | Inlet velocity too high; abrasive dust entering without pre-separation | Fit inlet deflector or cyclone pre-separator; reduce inlet velocity |
Filter bag wear — damage from adjacent bags | Bags touching due to incorrect spacing or swollen bags from moisture | Check bag spacing; inspect for moisture ingress; replace damaged bags |
Filter bag burned | Sparks or burning embers entering the filter from the process | Install spark arrestor upstream; check for and eliminate ignition sources |
Filter bag burned — dust overheating | Process gas temperature exceeds rated bag operating limit | Fit gas cooling equipment; upgrade to high-temperature bag material |
Filter bag clogging — extended service time | Bags have reached end of service life; dust cake cannot be cleaned off | Replace filter bags; review cleaning cycle frequency |
Filter bag clogging — moisture in process gas | Condensation forming on bag surface; inlet temperature below dew point | Increase gas temperature above dew point; insulate ductwork; check for water ingress |
Filter bag clogging — bag wetting | Water leak into housing; condensation on cold housing surfaces | Locate and seal water ingress; insulate housing in cold environments |
Filter bag clogging — excessive face velocity | Gas volume exceeds design capacity; incorrect system sizing | Reduce gas volume or upgrade to larger filter unit; review system design |
Filter bag clogging — poor cleaning performance | Pulse pressure too low; solenoid valves not firing correctly; pulse timing incorrect | Check compressed air supply pressure (min. 0.5 MPa); test each solenoid valve; adjust pulse timer |
Abnormal resistance increase — spray pipe blocked | Dust or foreign matter blocking pulse nozzle | Shut down and clear blockage from pulse pipes and nozzles |
Abnormal resistance increase — cleaning system fault | Pulse controller malfunction; solenoid valve failure; timer set incorrectly | Test controller outputs; replace faulty solenoid valves; reset pulse timer to recommended interval |
Abnormal resistance increase — dust humidity / clogging | Process gas moisture causing dust to bind to bag surface | Control process gas humidity at source; increase pulse cleaning intensity |
Abnormal resistance increase — ash settling incorrect | Pulse timing set too short for dust to settle before re-entrainment | Extend pulse off-time to allow full dust settlement into hopper |
Rapping mechanism failure (mechanical cleaning units) | Mechanism misalignment, worn components, or drive motor fault | Inspect and re-align rapping arms; replace worn components; check motor and drive |
Low compressed air pressure at pulse valves | Compressor output insufficient; supply line leaks; filter/regulator blocked | Check compressor rated output vs. demand; inspect all air line connections; service air filter and regulator |
Solenoid valve poor performance | Valve wear, contamination, spring breakage, or circuit fault | Clean valve internals; replace worn diaphragm or spring; check electrical connections and coil continuity |
High dust carry-through to outlet | Filter bag failure or hole; bag-to-cage seal leak; tube plate bypass | Inspect all bags for holes; check bag-to-tube-plate seals; replace failed bags immediately |
High dust carry-through — cleaning system failure | Dust not being dislodged from bags; ineffective pulse cleaning | Increase pulse pressure; test all solenoid valves; check compressed air volume |
Cylinder poor operation — leakage | Seal wear; piston rod corrosion; body crack | Replace seals; treat or replace corroded rod; repair or replace cylinder body |
Cylinder poor operation — insufficient travel | Pressure too low; blockage in supply line; worn piston seals | Increase supply pressure; clear line obstruction; replace piston seals |
Dust not discharging from hopper — hopper blockage | Dust compaction at hopper outlet; rotary valve jammed; screw conveyor fault | Clear compacted dust with rodding or vibration; inspect and free rotary valve; service conveyor |
Dust not discharging — dust consolidation | Hygroscopic or sticky dust setting hard in hopper | Apply hopper heating or vibration; inspect and clean hopper; review dust type vs. equipment spec |
Dust not discharging — rotary valve fault | Wear, seizure, or drive failure on rotary unloader | Inspect valve clearances; lubricate or replace bearings; check drive motor |
CATEGORY 07
Q: How do I order replacement filter bags or spare parts?
A: Contact us via email or phone with your equipment model number and the part reference from your supplied parts list. If you do not have the parts list, provide your order number or a description of the equipment (housing dimensions, number of bags, bag diameter and length, top fitting type) and we will identify the correct replacement parts. For filter bags, we can also supply to fit other manufacturers' housings — provide full dimensional details.
Q: What is the warranty period on Senotay equipment?
A: Our standard warranty period is 12 months from the date of commissioning or 18 months from the date of shipment, whichever comes first. The warranty covers manufacturing defects in materials and workmanship. It does not cover damage resulting from incorrect installation, operation outside specified parameters, normal wear items (filter bags, seals), or modifications made without our approval. Extended warranty arrangements are available for larger projects — discuss with our sales team at the time of order.
Q: Can you supply spare parts for equipment from other manufacturers?
A: In many cases, yes. We can manufacture filter bags, bag cages, pulse solenoid valves, and other accessories to fit equipment from a wide range of other manufacturers. Provide us with the relevant dimensions and specifications and we will confirm whether we can supply a compatible replacement.
Q: Do you offer maintenance contracts?
A: Yes. We offer scheduled maintenance contracts covering periodic site visits, full internal inspections, bag condition assessments, cleaning system servicing, and written maintenance reports. Contracts can be tailored to your maintenance schedule and budget. Contact us to discuss options.
Q: What technical support is available after purchase?
A: We provide 24/7 technical support via phone and WhatsApp for operational emergencies. Email support for non-urgent queries is answered within 24 hours on working days. For complex issues, we can arrange video call support with one of our engineers. On-site technical visits are available for urgent situations or scheduled maintenance. All customers retain access to their documentation package and can request updated drawings or specifications at any time.
Q: What should I do if my equipment is not performing to specification after installation?
A: Contact our After-Sales Support team immediately with a description of the symptoms, your differential pressure readings, compressed air pressure, and any changes to the process since installation. In most cases we can diagnose the issue remotely and provide corrective instructions. If an on-site visit is required, we will arrange this as quickly as possible. Do not modify the equipment settings or disassemble components before speaking with our team, as this can make diagnosis more difficult.
STILL HAVE A QUESTION?
If your question is not answered above, our engineering and sales team is available to help. We typically respond to all technical enquiries within 24 hours on working days, and within 4 hours for urgent operational support.
• Email: info@senotay.com
• Phone: +86-158-318-71808
• WhatsApp: +8615831871808 (24/7 for operational emergencies)
• Address: Botou Industrial Development Zone, Cangzhou City, Hebei Province, China
| Common Faults, Causes and Measures of Bag Filter | ||
| Fault phenomenon | cause | Exclusion measures |
| Filter bag wear | Rubbing with the box | Repair damaged bag or replace |
| Dust abrasion (thinning of filter bag under the filter) | Check the cause and deal with | |
| Damage caused by adjacent filter bags | Repair damaged bag or replace | |
| Filter bag burned | Inflow of fire | Elimination of fire |
| Dust fever | Eliminating dust and cooling | |
| Filter bag clogging | Long use time of filter bag | replace |
| Process gas contains moisture | Check the cause and deal with | |
| Filter bag wet | Repair, plugging | |
| Excessive wind speed | Reduce wind speed | |
| Poor cleaning | Strengthen dust removal and check cleaning mechanism | |
| Abnormal increase in resistance | Spray pipe plugging | Clearing and clearing |
| Dust removal mechanism malfunctions | Check and troubleshoot | |
| Dust, humidity, clogging, or poor cleaning | Control dust humidity, clean and clear | |
| Ash setting time incorrect | Adjust the timer time | |
| Rapping mechanism malfunctions (mechanical rapping and cleaning) | Check and adjust | |
| Reduced cylinder air pressure | Check and increase the pressure of compressed air | |
| Poor solenoid valve for cylinder | Check and adjust | |
| A lot of ash in the hopper | Clear dust | |
| Filter bag clogging | Check the reason, clear the jam | |
| Filter bag is wet due to water leakage | Patching loopholes | |
| Dust off the dust collector | Dust and humidity | Check the cause and troubleshoot |
| Dust removal mechanism malfunctions | Check, adjust and troubleshoot | |
| Dust cleaning solenoid valve fails | Inspection and replacement | |
| Defective timer set value is incorrect or has failed | Check and adjust the time setting value | |
| Insufficient spray | Check the reason and increase the injection pressure | |
| Poor cylinder operation | Poor solenoid valve operation | Check the cause and fix |
| Leakage | Inspection, plugging | |
| Piston Rod Corrosion | Rust removal or replacement | |
| Poor travel | Adjustment schedule | |
| Broken pressure pipe | repair | |
| Pressure pipe joint cracks, falls off | Repair and tighten | |
| Insufficient pressure in compressed air | Increase the pressure of pressure | |
| Compressor does not arrive | Check and clear the pipeline | |
| Poor solenoid valve operation | Circuit failure | Check the circuit and troubleshoot |
| Due to long-term static friction increase | Inspection | |
| Valve wear | replace | |
| Spring break | Replace spring | |
| Foreign matter in the valve | Remove foreign matter Sealed | |
| Dust in the ash bucket cannot be discharged | Dust in the lower part of the hopper | Remove dust plug |
| Spiral cutter failure | Check and troubleshoot | |
| Rotary valve malfunction | Inspection, repair | |
| Dust consolidation | Clean up consolidation dust | |
| Exclude flow channel blockage | Clean the flow cell and remove foreign matter | |
| Dust is wet and hard to fall | Cleaning dust, moisture treatment | |