pneumatic pinch valve

Pneumatic Valve Spring Compressors & Maintenance Hacks

Pneumatic ball valves offer robust on/off control by integrating a quarter-turn ball element with pneumatic actuators for automated operation. Their full-bore design minimizes pressure drop, while PTFE seats provide tight shutoff and chemical resistance. When paired with an actuator pneumatic valve interface, they deliver swift switching, position feedback, and optional manual override. Ideal for fluid handling, HVAC systems, and process control, they excel where rapid cycling and minimal maintenance are critical.
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3/2-Way Pneumatic Solenoid Valve, Fast Response, Industrial Use

3/2-Way Pneumatic Solenoid Valve, Fast Response, Industrial Use

A 3/2-way pneumatic solenoid valve with three ports and two positions switches airflow in under 10 ms. Nylon composite body and FKM seals withstand 10 bar and –10 °C to +60 °C. The 24 V DC coil draws 5 W via a DIN connector. Precision spool limits leakage to 0.2%, while a spring return ensures instant reset. Rated IP65 and over one million cycles durability for fast packaging and robotics.

Heavy-Duty Pneumatic Brake Valve for Mobile Machinery

Heavy-Duty Pneumatic Brake Valve for Mobile Machinery

Heavy-duty pneumatic brake valve features a cast-iron body with epoxy coating and brass internals for corrosion protection. Rated 0–16 bar and –30 °C to +70 °C, it includes an adjustable response regulator to set braking force and speed. A spring return engages fail-safe on air loss, and built-in relief prevents overpressure. Certified ISO 7653 for reliable braking in heavy machinery.

Electropneumatic Control Valve with 110V AC Actuator

Electropneumatic Control Valve with 110V AC Actuator

Electropneumatic control valve uses a 110 V AC solenoid coil and precision pneumatic spool to modulate airflow from 0 to 12 bar. Its PVC body and PTFE seals resist chemicals. The 6 W coil connects via a DIN connector. Provides leak-tight shutoff under 1 bar backpressure with Cv 0.8. Ideal for process automation, irrigation zones, and air distribution panels.

3-Way Pneumatic Ball Valve with Actuator, 250 PSI

3-Way Pneumatic Ball Valve with Actuator, 250 PSI

Handheld spring compressor tool features a hardened steel frame and adjustable jaws for 5–50 mm springs. A ratcheting handle with quick-release lever speeds compression cycles, and a safety lock pin secures springs. Weighing 1.2 kg, it fits maintenance kits. Ideal for disassembling valve cartridges, replacing seals, and rebuilding actuator modules to reduce downtime and improve technician safety.

We Have The Best Solutions for Your Business

COVNA GROUP CO., LTD is a world-leading valve manufacturer which specialized in solenoid valves, pneumatic valves, and electric valves for pipeline fluid control. COVNA originated from German technology, has its own R&D, design, production, sales team, and aims to be the global automation application service provider.

COVNA production range includes solenoid valves, pneumatic valves, electric valves, gate valves, globe valves, butterfly valves, control valves, safety valves, and various special valves. COVNA products are widely used in Water & Waste water treatment, Automation, Petroleum, Chemical, Electric power, Metallurgy, Mining, Paper-making, Pharmaceutical Industries, etc.

COVNA team make a rapid response to customer's requirements, provide professional product selection guidance and reliable valve application solutions.So far, COVNA has achieved ISO 9001 Quality Management System Certification, CE Certification, RoHS Certification.

Why Choose COVNA

Global Expertise

COVNA delivers valve solutions to customers in over 120 countries, combining global market expertise with localized support to meet diverse industry needs and ensure reliable performance worldwide.

Advanced Technology

Backed by German technology, COVNA specializes in solenoid, pneumatic, and electric valves, providing innovative fluid control solutions designed for precision, efficiency, and long-lasting durability.

Strong Manufacturing

With a modern factory, CNC machining, and strict quality testing, COVNA ensures every valve meets international standards, delivering consistent reliability for water, oil, gas, and automation industries.

Trusted Brand

Recognized as a preferred supplier by global partners, COVNA has built long-term trust through consistent product quality, professional technical support, and comprehensive after-sales services.

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FREQUENTLY ASKED QUESTION

Do You Have Any Question?

A pneumatic valve is an actuator that uses compressed air to control the flow or direction of a fluid. Common types include solenoid valves, directional valves, flow control valves, check valves, pressure regulating valves, and actuators such as ball valves and butterfly valves.

First, determine the media type, rated pressure, temperature range, and required port diameter. Then, consider the coil voltage, response speed, and sealing material. Finally, consider the installation method and certification requirements.

A three-way valve has three ports and two channel states and is primarily used for one-way control or exhaust. A five-way valve has five ports and two states and can switch double-acting cylinders in both forward and reverse directions. A three-way valve is used for quick exhaust or simple switching, while a five-way valve is used for complex circuits or double-acting actuators.

Leakage: Check seals for wear and threads for tightness. Seizure: Clean the valve core, lubricate the guide, or replace the filter element. Coil inactivity: Measure voltage and check coil resistance. Slow actuation: Clean the air source, adjust the speed regulating valve, or replace the spring.

Regularly clean the air inlet filter and keep the lubrication unit filled with oil. Check joints, seals, and springs for wear. Verify air leakage every six months. Replace internal components promptly in case of severe contamination or wear to extend the life of the valve body and actuator.

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