Pneumatic Valves: Maintenance Tips & Troubleshooting Guide
Covna High-Temperature Pneumatic Globe Valve for Steam & Thermal Fluid Systems
Covna’s high-temperature pneumatic globe valve is built to handle extreme thermal conditions, making it a top choice for steam boilers, thermal fluid systems, and industrial heating applications. Constructed with a cast steel body and Inconel trim, the valve withstands temperatures up to 450°C and pressures up to 600 PSI, resisting oxidation and thermal fatigue. Its linear flow control design allows for precise adjustment of flow rates, ensuring stable temperature regulation in processes like food sterilization and chemical synthesis. The pneumatic actuator features a spring-return mechanism for fail-safe operation (opens or closes on air loss), enhancing system safety. Equipped with a handwheel for manual override, this valve is easy to maintain and compatible with industry-standard actuators, backed by Covna’s expert engineering support.
Covna Sanitary Pneumatic Diaphragm Valve for Food & Pharmaceutical Processing
Meeting strict hygiene standards for food, beverage, and pharmaceutical industries, Covna’s sanitary pneumatic diaphragm valve ensures contamination-free fluid control. The valve’s 316L stainless steel body features a smooth, crevice-free design (Ra ≤ 0.8μm) that eliminates bacterial buildup, complying with FDA, 3-A, and EHEDG regulations. Its PTFE diaphragm acts as a barrier between the fluid and actuator, preventing cross-contamination and simplifying cleaning (CIP/SIP compatible). The pneumatic actuator provides gentle, precise operation, avoiding product shear—ideal for handling sensitive media like syrups, vaccines, and dairy products. Available with tri-clamp or weld connections, this valve offers quick disassembly for diaphragm replacement, reducing downtime. Covna’s sanitary valves undergo rigorous testing to ensure reliability in critical, hygiene-focused environments.
Covna Compact Pneumatic Solenoid Valve for Low-Flow Industrial Automation
Covna’s compact pneumatic solenoid valve is engineered for low-flow industrial automation, perfect for controlling air, water, and light oils in robotics, packaging, and instrumentation systems. Its miniaturized design (1/8” to 1/4” ports) saves space in tight setups, while the brass body and NBR seal ensure durability and leak resistance. The integrated solenoid coil (12V DC/24V DC/110V AC) provides fast response times (<50ms), enabling precise on/off control in automated processes. The valve operates at pressures from 0.1 to 1.0 MPa and temperatures up to 80°C, with options for normally open (NO) or normally closed (NC) configurations. Easy to install with push-to-connect or threaded fittings, it’s compatible with standard PLC outputs, making it a versatile choice for OEMs and system integrators. Covna offers custom coil voltages and port sizes to match specific automation needs.
Covna Pneumatic Butterfly Valve with EPDM Seat for HVAC & Water Treatment
Designed for precision flow control in HVAC systems and water treatment plants, Covna’s pneumatic butterfly valve combines affordability with reliable performance. The valve’s ductile iron body and 304 stainless steel disc offer durability, while the EPDM seat provides bubble-tight sealing to prevent leakage—critical for maintaining water pressure and energy efficiency. Its compact, lightweight design simplifies installation in tight spaces, making it ideal for retrofits. The pneumatic actuator, paired with a positioner, allows for smooth modulation (0-90 degrees) and remote control via PLC or SCADA systems, reducing manual labor costs. Suitable for temperatures ranging from -10°C to 120°C, this valve meets ISO 5211 standards and comes with optional accessories like limit switches for real-time position monitoring.
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Professional ProductioTechnology
We focus on the research of the anti-piercing shoe midsole, interrupting the monopoly position of the anti-piercing cloth midsole inforeian countries. and producing the anti-piercing cloth midsole of our own branc, filing the domestic gap
Professional ProductioTechnology
We focus on the research of the anti-piercing shoe midsole, interrupting the monopoly position of the anti-piercing cloth midsole inforeian countries. and producing the anti-piercing cloth midsole of our own branc, filing the domestic gap
Professional ProductioTechnology
We focus on the research of the anti-piercing shoe midsole, interrupting the monopoly position of the anti-piercing cloth midsole inforeian countries. and producing the anti-piercing cloth midsole of our own branc, filing the domestic gap
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FREQUENTLY ASKED QUESTION
Do You Have Any Question?
Covna pneumatic valves excel in applications requiring fast actuation, high force output, and durability in harsh environments. They operate using compressed air, eliminating the need for electrical wiring in hazardous areas, and are less prone to overheating than electric valves. Electric valves may be preferred for precise proportional control or where compressed air is unavailable, but Covna’s pneumatic valves offer lower maintenance costs, faster response times, and better reliability in high-cycle industrial settings.
Absolutely. Covna specializes in custom pneumatic valves, offering options like non-standard port sizes, special materials (Hastelloy, Monel), custom actuation speeds, and integrated accessories (solenoids, limit switches, positioners). Whether you need a valve for high-vibration environments, extreme pressures, or unique media compatibility, Covna’s engineering team collaborates with clients to design tailored solutions, supported by prototyping and testing.
Yes. Covna offers pneumatic valves with explosion-proof actuators certified to ATEX, IECEx, and UL standards, making them safe for use in zones with flammable gases, vapors, or dust (e.g., oil refineries, chemical plants). These valves feature sealed enclosures to prevent ignition, and optional intrinsically safe positioners ensure compatibility with hazardous area control systems.
To choose the right Covna pneumatic valve, consider key factors like media type (liquid, gas, corrosive, sanitary), pressure range (operating and maximum pressure), temperature, flow rate, and connection type (flange, threaded, sanitary). For example, use 316 stainless steel valves for corrosive chemicals, sanitary diaphragm valves for food/pharma, and high-temperature globe valves for steam systems. Covna’s technical team can also assist with sizing calculations and custom configurations based on your system requirements.
Regular maintenance ensures optimal performance. For most Covna pneumatic valves, this includes inspecting the actuator for air leaks, cleaning or replacing filters in the air supply line, lubricating moving parts (if applicable), and checking seals/gaskets for wear. Sanitary valves should undergo CIP/SIP cycles as per industry standards. Covna provides detailed maintenance guides, and replacement parts (diaphragms, seats, actuators) are readily available to minimize downtime.
