Emerson ASCO Compressed Air Filter Regulator 342A 641/2/3 Series Pressure Regulating Valve

The ASCO 342A Compressed Air Filter Regulator is a premium filter-regulator designed for harsh process environments. Constructed in 316L stainless steel, the regulator/filter ensures upstream media is clean and dry and then precisely regulates pressure for downstream pneumatic systems or instrumentation. Designed for high flows and demanding conditions, the 342A series supports compressed air and sour gas, dual gauge ports, auto-drain or manual drain options, and certifications for functional safety and corrosive service.

• Heavy duty 316L stainless steel body and bowl for corrosion resistance in harsh service.
• High flow design with optimized flow paths and reinforced diaphragm for superior performance.
• Adjustable outlet pressure range from approximately 0.5 to 10 bar (7 to 145 psi) depending on configuration.
• Filtration options: 5 µm, 25 µm, 40 µm to ensure clean downstream media.
• Operating temperature range from –40°C to +90°C (–40°F to +194°F) with special low-temperature variants to –60°C.
• Certifications and options for sour gas service (NACE MR0175 compliant), functional safety (SIL certified), explosion-hazard atmospheres (ATEX) and IP65 ingress protection.
• Dual pressure gauge ports and optional quick-relief or auto-drain features.

• High-flow pneumatic actuator supply in petrochemical, oil & gas, chemical and sour-gas environments.
• Control instrument air preparation for process control valves, pneumatic control systems, and compressors.
• Harsh or corrosive environments requiring stainless steel wetted parts and high integrity filtration/regulation.
• Any compressed air, neutral gas or sour gas service where contamination and correct downstream pressure are critical.

Q1: Is the ASCO 342A suitable for sour gas or corrosive applications?
A1: Yes. The 342A is built with 316L stainless steel materials, offers NACE MR0175 compliance, and options for sour gas service.

Q2: Can this regulator handle very high flow volumes?
A2: Yes. The 342A series is designed for high-flow rates, with sizing ranges from approximately 1400 to 9500 L/min (49 to 335 SCFM) depending on model and port size.

Q3: What type of drain options are available?
A3: Models can be configured with auto-drain or manual drain options and may include quick relief to prevent trapped downstream pressure.

Q4: What is the temperature rating for the standard model?
A4: Standard models are rated –40 °C to +90 °C (–40 °F to +194 °F). Low temperature option supports down to –60 °C (–76 °F).

For quotations, technical selection support or global supply enquiries, please contact:
Phone: +86-15000725058
Email: edward.zhao@gongboshi.com
Website: https://www.shgongboshi.com/contactus.html

• ASCO Series 342A High-Flow Filter/Regulator (other port sizes)
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