Product Description
A hydraulically controlled check valve is a valve that can make the check valve flow in the opposite direction by controlling the fluid pressure. This kind of valve occupies an important position in the hydraulic support equipment of coal mining machinery. The difference between the hydraulic check valve and the ordinary check valve is that there is an additional control oil circuit, when the control oil circuit is not connected to the pressure oil, the hydraulic check valve works like an ordinary check valve, and the pressure oil only flows from the oil inlet to the oil outlet, and cannot flow in reverse. When the control oil circuit has a control pressure input, the piston ejector rod moves to the right under the action of pressure oil, and the check valve is opened with the ejector rod to make the inlet and outlet ports connected. If the oil outlet is larger than the oil inlet, the oil can flow in the opposite direction.




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FAQ
Q:1. Are you a factory or a trading company?
A: We are a hydraulic and pneumatic equipment manufacturer located in Hebei, China. Hebei Zhongchuang is committed to promoting the development of hydraulics in overseas markets through innovative technology, quality products and excellent services
Q:2. Do you accept OEM? What is your minimum order quantity? Do you have OEM experience?
A: We accept OEM for every product we produce. If you want OEM, there is no minimum order quantity for any of our products. We have been doing OEM since we built the factory. We have a mature technical team ready to discuss your unique requirements with you.
Q:3. Is your delivery always on time?
A: We cannot guarantee the freight, but what we can do is to shorten the delivery time while maintaining the same quality level. So there will be no problem even if the sea freight is delayed for a few days.
Q:4. Why don't you have CE certification?
A: CE certification is for one product, not for the entire factory. We have too many product lines to register CE, but our customers from Europe said that it is easy to solve the CE problem. We are in the process of CE certification registration to save customers time in the future. By the way, there are many fake CE certified products in the market, please pay attention to this to avoid unnecessary problems.
Q:5. How do I start an order?
A: First, discuss your machine model, working conditions, technical requirements, deadlines with our sales. Then, our sales will provide the details you need. All inquiries will be replied within 24 hours.
Q:6. Can you give me the latest information about the production process of the order?
A: Of course, unlike other companies that may hide their production process, our production process is completely open to customers. Please feel free to inform our sales of your needs.