Frequently Asked Questions — Dust Filtration Systems

We supply pulse jet valves in 1″, 1.5″, 2″ and 2.5″ sizes. These are direct replacements for ASCO, Goyen, DMF and SBFEC valves. All valves are pressure-tested before shipment. Custom specifications are available upon request.

Yes. Our valves use the same port dimensions, thread specifications and mounting patterns as the original brands. No modification to your manifold or blowpipe is required for a standard replacement.

Standard operating range is 0.3 to 0.8 MPa (3 to 8 bar). We recommend 0.5–0.6 MPa for optimal pulse energy and diaphragm membrane longevity.

Common signs include: weak pulse (insufficient pressure spike), continuous air leakage through the exhaust, valve not opening (coil issue), or valve not closing fully. If your differential pressure keeps rising despite cleaning cycles, suspect valve or membrane failure.

Yes. We supply replacement coils for all valve sizes in 24V DC, 110V AC and 220V AC configurations. Please specify the voltage and connector type when ordering.

We supply the following media:

• Polyester (PE) – general purpose, up to 130°C
• PPS (Ryton) – chemical resistance, 160°C continuous (190°C peak)
• PTFE membrane – surface filtration, high efficiency
• Nomex (Aramid) – continuous use up to 190°C
• Fiberglass – extreme heat up to 260°C
• Anti-static – for wood, flour, feed processing plants

Key parameters: flue gas temperature (continuous and peak), dust chemical composition, moisture content, and required emission standard. Share these with our engineer and we will recommend the appropriate media. Incorrect material selection is one of the most common causes of premature bag failure.

Yes. We manufacture filter bags to your exact dimensions: diameter, length, snap ring or sewn top, and cuff type. Provide us with one sample bag or detailed drawing. Minimum order quantities apply for custom sizes.

Common causes: incorrect material for the temperature or chemical environment; damaged or oversized cage frames causing abrasion; insufficient or excessive pulse cleaning; condensation or moisture causing blinding; and incorrect installation causing bag-to-bag contact or tube sheet leakage.

We can provide: material datasheets, air permeability test reports, tensile strength reports, and dimensional inspection certificates. For ATEX-rated anti-static bags, we provide the relevant test documentation on request.

We stock NBR (standard, -20°C to +80°C), EPDM (weather and ozone resistant), and Viton/FKM (chemical and high-temperature environments up to 200°C). Membrane selection depends on your valve type and gas composition.

Typical service life is 1–3 years depending on pulse frequency, compressed air quality, and operating temperature. We recommend inspection during planned maintenance and replacement when hardening, cracking, or air leakage is detected.

We manufacture membranes dimensionally matched to ASCO, Goyen, DMF, SBFEC and Taeha valves. Please provide the valve model number or a photo of the existing membrane for exact matching.

We supply: galvanized steel (standard), silicone-coated (high temperature), and SS304/SS316 stainless steel (corrosive environments). All frames are produced to your exact dimensions.

Provide: wire diameter, number of wires, cage diameter, cage length, and top ring/venturi specification. If you have an existing cage, we can produce exact replicas based on sample measurement or technical drawing.

Oversized diameter causes radial friction; burrs or weld spatter on wires cause punctures; bent or distorted frames cause uneven load during pulse cleaning. We inspect all frames for burrs and straightness before delivery.

Standard items (common valve sizes, stock bag materials): 3–7 working days. Custom filter bags: 10–21 working days depending on quantity and material. Custom cage frames: 7–14 working days. We confirm lead time with each order.

Yes. We issue Vietnamese VAT (GTGT) invoices for all transactions. For FDI companies requiring specific invoice formats or purchase order procedures, please inform us at the time of inquiry.

Yes. We deliver to all provinces in Vietnam via trusted logistics partners. For urgent orders or large shipments, express and dedicated delivery options are available. We can also arrange delivery to your warehouse or factory gate.

Yes. We welcome plant visits and on-site consultations. Our engineers can visit your factory to inspect your baghouse, review the existing components, and provide a detailed technical recommendation. Please contact us to schedule an appointment.

For filter bags: bag dimensions (diameter × length), material, top ring type, quantity. For valves: brand, model number, coil voltage, quantity. For membranes: valve brand and model. For cage frames: diameter, length, number of wires, material. The more detail you provide, the faster we can respond.

Yes. We provide post-supply technical support including installation guidance, troubleshooting assistance, and performance review. If you experience issues after installation, our engineer will help diagnose the cause at no additional charge.

Yes. We work with plant maintenance teams to plan component requirements for annual shutdowns. Pre-ordering critical components ensures availability and avoids supply delays during your maintenance window. Contact us at least 4 weeks before your planned shutdown.