Dear industry colleagues, partners and guests:

We sincerely invite you to participate in WATERTECH China 2025, a highly anticipated water treatment technology exhibition in the industry. As a leading industrial automation company, Covna Industrial Automation Co., Ltd. will showcase innovative water treatment solutions and automation technologies at this exhibition.

Exhibition name: WATERTECH China 2025

Exhibition date: June 3-6, 2025

Exhibition location: National Exhibition and Convention Center (NECC), Shanghai, China

Booth number: Hall 7.1H, Booth 745

This exhibition will bring together industry elites to discuss the latest technologies, market trends and cooperation opportunities. We look forward to communicating with you and jointly promoting the development of the industry.

Understanding how does a check valve work is key to appreciating its role in fluid systems. A check valve is designed to allow flow in one direction while effectively preventing reverse flow. This simple yet efficient mechanism protects equipment and systems from damage due to backflow.

At its core, a check valve consists of a movable component—such as a ball, disc, or poppet—that responds to pressure differences. When fluid moves in the intended direction, the pressure pushes the part open, allowing the fluid to pass. If the flow reverses, the component shifts into a closed position, stopping any backflow. COVNA engineers design these valves with precision, ensuring durability and reliable performance under various operating conditions.

Knowing how to change valve cover gasket is essential for maintaining engine performance and preventing oil leaks. Over time, this gasket can wear out due to heat and pressure, leading to reduced efficiency. Here’s a step-by-step guide to replacing it, ensuring a secure seal with COVNA’s reliable gasket solutions.

1. Preparation – Before starting, gather the necessary tools: a socket wrench, screwdriver, gasket sealant, and a new COVNA valve cover gasket.
2. Disconnect Components – Remove any hoses or wiring obstructing the valve cover. Use a wrench to loosen and remove the bolts securing the cover.
3. Remove Old Gasket – Carefully lift the valve cover and peel off the worn gasket. Clean the surface to ensure a proper fit for the new gasket.
4. Install New COVNA Gasket – Position the new gasket in place, applying a thin layer of gasket sealant if necessary.
5. Reattach Valve Cover – Secure the cover with bolts, tightening them evenly to prevent warping.
6. Reconnect Components – Restore hoses and wiring, then start the engine to check for leaks.

When asking "what is a valve cover gasket," we are referring to a small yet essential component that seals the joint between the engine block and the valve cover. This gasket prevents oil leaks and keeps dirt and contaminants out of the engine, ensuring smooth and efficient functioning under high heat and pressure.

A solenoid valve is an electromechanical device designed to control the flow of fluids. It operates when an electric current energizes its coil, creating a magnetic field that moves a plunger or armature. This movement opens or closes a pathway, allowing water, gas, or other mediums to flow. Solenoid valves are widely used in industrial automation, irrigation systems, and heating and cooling applications because of their speed, reliability, and ease of control.

The PCV (Positive Crankcase Ventilation) valve plays a vital role in the engine. It is mainly used to regulate the pressure in the crankcase, re-introducing the "blowing air" generated by the imperfect piston ring seal during the combustion process into the intake system to achieve exhaust gas re-combustion, thereby reducing harmful emissions and improving engine efficiency.

This process not only effectively controls the exhaust gas flow, but also prevents excessive pressure in the crankcase from causing oil seal leakage or other mechanical failures. Through precise pressure balance and flow control, the PCV valve ensures the stability of the internal environment of the engine, extends the service life of key components, and meets increasingly stringent emission standards.

As an industry-leading valve brand, COVNA relies on advanced production processes and high-quality materials to continuously optimize the design of PCV valves to ensure excellent sealing and response speed under harsh working conditions such as high temperature and high pressure. Whether in regulating flow or maintaining system pressure, COVNA's PCV valves can be accurate and efficient, providing a solid backing for the stable operation of automobile engines.