The ASCO SCG353A050 pulse jet valve is a solenoid-operated diaphragm valve designed for compressed-air cleaning systems in industrial dust collectors. It belongs to the ASCO Series 353 family, which is developed to provide high airflow, rapid opening and closing, and reliable operation in demanding filtration applications.
With a nominal 2-inch pipe connection and a large flow passage, the SCG353A050 is designed for dust collection systems that require substantial compressed-air delivery during filter cleaning cycles. It is commonly associated with baghouse and cartridge dust collectors used in industrial production environments.
For equipment manufacturers, maintenance teams, and industrial distributors, selecting the correct valve requires more than matching the nominal connection size. The complete model number, thread standard, electrical configuration, operating pressure, and diaphragm assembly should all be verified before purchasing a replacement.
1. ASCO SCG353A050 Pulse Jet Valve Overview
The SCG353A050 is an integral-pilot diaphragm pulse valve in the ASCO Series 353 range. Its solenoid-controlled pilot mechanism operates the main diaphragm to release compressed air into the dust collector’s blow tube.
During a cleaning cycle, the control system energizes the solenoid coil. The pilot mechanism initiates the opening of the main valve, allowing compressed air to pass through the valve and generate a short, powerful pulse. This pulse travels through the blow tube and helps remove accumulated dust from the filter bags or cartridges.
After the electrical signal ends, the valve returns to its closed position and is ready for the next cleaning cycle.
Key product characteristics include:
- Manufacturer: ASCO
- Product series: 353
- Model: SCG353A050
- Product type: Integral-pilot diaphragm pulse valve
- Nominal pipe size: 2 inches
- Orifice size: 66 mm
- Valve function: Two-way, normally closed
- Body material: Aluminium in the standard configuration
- Internal components: Stainless steel core tube, core, plugnut, and spring
- Sealing material: NBR
- Diaphragm material: Chloroprene in the referenced standard catalogue configuration
- Operating medium: Compressed air
Material and electrical options may vary according to the complete valve configuration. Always check the product nameplate and applicable technical documentation before ordering.
2. Technical Specifications of SCG353A050
The following table summarizes the principal specifications listed in the ASCO Series 353 technical catalogue.
| Parameter | Specification |
|---|---|
| Manufacturer | ASCO |
| Series | 353 |
| Model | SCG353A050 |
| Valve type | Integral-pilot diaphragm pulse valve |
| Valve function | 2-way, normally closed |
| Nominal pipe size | 2 inches |
| Orifice size | 66 mm |
| Flow coefficient (Kv) | 77 m³/h |
| Reference flow coefficient | 1,290 l/min |
| Operating medium | Air |
| Body material | Aluminium |
| Core tube | Stainless steel |
| Core and plugnut | Stainless steel |
| Core spring | Stainless steel |
| Sealing material | NBR |
| Standard diaphragm material | Chloroprene |
| Differential pressure range | 0.35–8.5 bar |
| Ambient temperature range | -20°C to +85°C |
These values are based on the referenced Series 353 catalogue. Confirm the complete part number and configuration before using the table as a purchasing or engineering specification.
2-inch connection and 66 mm orifice
The 2-inch nominal connection is one of the main identification features of the SCG353A050. Its 66 mm orifice provides a large flow passage for compressed-air pulse cleaning.
When selecting a replacement, check the actual thread standard and connection dimensions. ASCO Series 353 products may be supplied with different connection configurations, including G-thread and NPT-thread options. A matching nominal pipe size alone does not guarantee that two valves can be installed interchangeably.
Flow coefficient and compressed-air delivery
The catalogue lists a Kv value of 77 m³/h, equivalent to a reference value of approximately 1,290 l/min in the product specification.
The flow coefficient helps engineers evaluate the valve’s flow capacity when designing or maintaining a compressed-air cleaning system. However, actual pulse performance also depends on air reservoir capacity, supply pressure, blow tube dimensions, piping losses, and pulse duration.
Therefore, the valve should be selected as part of the complete dust collector cleaning system rather than based on flow coefficient alone.
Operating pressure and temperature
The referenced Series 353 catalogue specifies a differential pressure range of 0.35–8.5 bar and an ambient temperature range of -20°C to +85°C.
The available compressed-air pressure at the valve inlet must meet the operating requirements during each cleaning cycle. Pressure fluctuations, excessive moisture, and contaminated air may affect valve operation and diaphragm service life.
Solenoid and electrical configuration
The Series 353 product family offers different coil voltage configurations. The referenced catalogue lists standard options including:
- 24 V DC
- 24 V AC, 50 Hz
- 110 V AC, 50 Hz
- 120 V AC, 60 Hz
- 220 V AC, 50 Hz
- 240 V AC, 60 Hz
Other electrical options may be available depending on the product configuration.
Before ordering a replacement, check the voltage and frequency printed on the installed solenoid coil. The valve model number should not be used as the only reference for electrical selection.
3. Industrial Applications of the SCG353A050
The SCG353A050 is designed for compressed-air pulse cleaning in industrial filtration equipment. Its suitability depends on the dust collector design, air supply, piping arrangement, and required cleaning performance.
Baghouse dust collectors
Baghouse systems use filter bags to capture dust from industrial exhaust air. During operation, dust accumulates on the filter surfaces and gradually increases airflow resistance.
The pulse cleaning system releases compressed-air bursts through blow tubes to remove the accumulated dust. The SCG353A050 can be used in compatible installations designed around its 2-inch connection and flow requirements.
Cartridge dust collectors
Cartridge filters are widely used in industrial dust extraction systems. Their pleated filter media require periodic cleaning to maintain stable filtration performance.
A suitable pulse valve delivers the compressed-air burst needed to dislodge dust from the filter surface. Correct valve sizing, air pressure, and pulse timing are important for effective cleaning.
Cement and building materials production
Cement plants, concrete production facilities, and building materials manufacturers generate dust during conveying, mixing, crushing, and material handling.
Dust collectors installed in these production areas need reliable pulse cleaning systems. The SCG353A050 may be selected for compatible installations where its connection size and operating characteristics meet the equipment requirements.
Metallurgy and steel processing
Metal processing and steel production involve operations such as cutting, grinding, material transfer, and furnace-related processes that can generate significant quantities of airborne particles.
Industrial filtration systems help control these emissions. Pulse valves are essential components of the filter cleaning arrangement, and their correct selection helps maintain reliable dust collector operation.
Chemical and power generation industries
Chemical production facilities and power plants also use dust collection systems to manage particulate emissions from different processes.
In these applications, the valve’s material compatibility, operating temperature, electrical configuration, and compressed-air quality should be evaluated against the actual working environment.
4. Installation and Maintenance Considerations
Correct installation and regular maintenance help maintain the performance of the SCG353A050 and reduce unnecessary interruptions to dust collector operation.
Verify the pipe connection
Before installation, confirm that the replacement valve has the correct 2-inch connection and thread standard. Check the available installation space and compare the valve dimensions with the existing assembly.
Clean the compressed-air piping before connecting the valve. Contamination inside the pipework can interfere with the pilot mechanism and diaphragm assembly.
Maintain the compressed-air supply
The valve requires a suitable compressed-air supply to produce effective cleaning pulses. Insufficient pressure or unstable supply conditions may lead to weak pulses or inconsistent operation.
Check the air reservoir, pressure regulator, upstream filtration, and piping arrangement if the cleaning performance deteriorates.
Inspect the diaphragm assembly
The diaphragm is a critical component because it controls the main compressed-air passage. Repeated operation, contamination, and unsuitable operating conditions can contribute to diaphragm wear.
Typical symptoms of diaphragm-related problems include:
- Continuous compressed-air leakage
- Weak or inconsistent cleaning pulses
- Delayed valve opening or closing
- Failure to operate during the cleaning sequence
If these symptoms occur, isolate the air supply and inspect the diaphragm assembly according to the manufacturer’s maintenance instructions.
Check the solenoid coil and control system
Electrical problems can also prevent the pulse valve from operating correctly. Inspect the solenoid coil, connector, wiring, and pulse controller output.
Confirm that the supply voltage and frequency match the installed coil. Replacing the diaphragm will not resolve a fault caused by an incorrect electrical supply or damaged solenoid.
Always disconnect electrical power and fully depressurize the system before carrying out maintenance.
5. Diaphragm Repair Kits for SCG353A050
The diaphragm assembly is a service component of the SCG353A050. When the valve develops diaphragm-related leakage or fails to produce an effective pulse, replacing the compatible diaphragm assembly may be more practical than replacing the entire valve.
For the ASCO Series 353 2-inch and 2.5-inch valve models, supplier cross-reference information commonly lists C113685 and, in some product listings, C113686 as diaphragm repair kit references.
However, the available cross-reference information is not completely consistent about which kit configuration applies to each valve version. Therefore, do not assume that C113685 and C113686 are interchangeable or that both fit every SCG353A050 assembly.
Before ordering a repair kit, confirm:
- Complete valve model: Check that the existing valve is SCG353A050.
- Diaphragm configuration: Confirm the original diaphragm design and material.
- Repair kit reference: Verify the correct kit number against the valve’s parts documentation.
- Material requirements: Check whether the application requires NBR, FPM, or another specified material.
- Kit contents: Confirm that the supplied diaphragm and associated components match the original assembly.
Providing the valve nameplate, existing diaphragm reference, and photographs of the internal assembly can help a supplier identify the correct replacement kit.
6. SCG353A050 vs. SCG353A051
The ASCO Series 353 range includes several large-size pulse valves. The SCG353A050 and SCG353A051 are particularly important to distinguish because their nominal pipe sizes are different.
| Parameter | SCG353A050 | SCG353A051 |
|---|---|---|
| Nominal pipe size | 2 inches | 2.5 inches |
| Orifice size | 66 mm | 66 mm |
| Flow coefficient (Kv) | 77 m³/h | 92 m³/h |
| Main application | Compatible 2-inch pulse cleaning systems | Compatible 2.5-inch pulse cleaning systems |
Although these models share some design characteristics, their connection sizes and flow coefficients differ. They should not be treated as direct replacements without checking the installation and system requirements.
When replacing either model, verify the connection dimensions, thread standard, electrical configuration, and diaphragm repair kit reference.
7. Frequently Asked Questions
What is the connection size of the ASCO SCG353A050?
The SCG353A050 has a nominal pipe size of 2 inches. Confirm the actual connection and thread standard before purchasing a replacement.
What is the orifice size of the SCG353A050?
The referenced ASCO Series 353 catalogue lists an orifice size of 66 mm.
What is the flow coefficient of the SCG353A050?
The catalogue lists a Kv flow coefficient of 77 m³/h, with a reference flow value of approximately 1,290 l/min.
What is the operating pressure range?
The referenced Series 353 catalogue specifies a differential pressure range of 0.35–8.5 bar. The actual installation must meet the requirements of the complete valve configuration.
Which diaphragm repair kit is suitable for the SCG353A050?
C113685 and C113686 appear in supplier cross-reference listings for the larger ASCO Series 353 pulse valves. The exact kit should be confirmed against the valve version and diaphragm assembly before ordering.
What causes an SCG353A050 pulse valve to leak?
Possible causes include diaphragm damage, contamination, sealing problems, or unsuitable operating pressure. The pilot mechanism and solenoid control system should also be inspected when diagnosing valve faults.
Conclusion
The ASCO SCG353A050 pulse jet valve is a 2-inch integral-pilot diaphragm valve designed for compressed-air cleaning in industrial dust collection systems. Its main catalogue specifications include a 66 mm orifice, a Kv flow coefficient of 77 m³/h, and a differential pressure range of 0.35–8.5 bar.
Correct replacement selection requires checking the complete valve configuration, connection standard, electrical supply, and diaphragm assembly. For maintenance work, verify the applicable repair kit reference before ordering C113685 or C113686.
BMP Pneumatics supplies pulse jet valves and diaphragm repair solutions for industrial dust collection applications. Contact our team with your valve model and technical requirements to help identify a suitable replacement or repair kit.