Piston Type Check Valve

Piston Type Check Valve

piston type check valve is to rely on the medium itself flow and automatically open and close the valve flap, used to prevent the backflow of the medium valve, also known as check valve, check valve, backflow valve, and back pressure valve. Check valve belongs to a kind of automatic valve, its main role is to prevent the backflow of the medium, to prevent the pump and drive motor reversal, as well as the release of the container medium. Piston check valve valve flap is disc-shaped, rotating movement around the axis of the valve seat channel, because the valve channel into streamline, flow resistance than rising butterfly check valve is small, suitable for low flow rate and flow does not often change the large diameter occasions, but not for pulsating flow, its sealing performance is not as good as lifting type. Butterfly check valve is divided into single-valve type, double-valve type and multi-half type three, these three forms are mainly divided by valve caliber, the purpose is to prevent the media to stop flowing or backflow, weakening the hydraulic impact.

During the use of this valve, the medium flows in the direction of the arrow shown in the figure.

1、When the medium flows in the specified direction, the valve flap is opened by the force of the medium; when the medium flows in the opposite direction, the valve flap is closed because of the self-weight of the valve flap and the valve flap is subject to the reverse force of the medium, so that the sealing surface of the valve flap and the valve seat are tightly closed to stop the medium from flowing in the opposite direction.

2、The valve body and the sealing surface of the valve flap using stainless steel overlay welding.

3、The valve structure length according to the provisions of GB12221-1989, flange connection size according to the provisions of JB/T79-1994.

Zhejiang Huachi Co., Ltd produces stainless steel waterproof hammer piston check valve YQ98004-10P DN125 filtering piston slow-closing check valve, YQ98004 filtering piston slow-closing check valve is installed in the water supply system of waterworks and high-rise buildings, as well as other water supply systems on the pump outlet pipeline to prevent the backflow of media, to prevent the phenomenon of water hammer and water strike. A valve both electric valve, check valve and water hammer eliminator, can effectively improve the safety and reliability of the water supply system. Our company produces YQ98004 filtering piston check valve smoothly and reliably, eliminating pressure residuals.

Filtering piston type slow-closing check valve is installed in the pipeline of high-rise buildings, fire-fighting water supply systems and other water supply systems. When the pump is turned on, water enters the middle chamber through the conduit and pushes the piston up and the main valve switches on and off. When the pump stops working, the piston drops in the return water pressure, and since the flow rate of the needle valve at the inlet is smaller than that of the ball valve at the outlet, the piston slowly drops and the main valve slowly closes.

The company has advanced CNC machine tools, CNC machine tools, metal processing, turning and milling composite equipment; automatic submerged arc, gas preservation and other welding equipment; heat treatment equipment; advanced mechanical and chemical testers, nondestructive testing test instruments, spectral analyzer, hardness tester, ultrasonic thickness tester, ultrasonic flaw detector, etc. and advanced comprehensive valve performance tester torque, life tester, our processing equipment is advanced, complete testing equipment and methods.

FAQ

Q1:Can you provide samples before a big order?

A: Yes, we can.

02:Is there any discount for large quantity?

A:Honestly, we not only give you discounts because of the quantity, but we also give you discounts when we do promotions during the valve purchasing season.

03:What will you do if the product has quality problems?

Usually all of our products are subject to quality inspection and pressure test before delivery. For quality problems caused by improper use, we will propose some solutions but not bear the cost, if the product quality problems are caused by our production, we will provide solutions and bear the corresponding repair costs.

04:How long is your delivery time?

A:Generally speaking, it depends on the quantity and the type of products. If in stock, the delivery time is within one week. If it is in stock, it will take 25 -45 days.

Q5:What is your payment method?

A:30% by wire transfer as deposit and the balance before shipment.

Q6:Do you provide customized or OEM service?

A:Of course, we complete the production according to the customer's requirements, which is customization. If you have brand OEM, please provide me the brand authorization letter for future export.