NEWS-第4页-HENAN MF VALVE CO.LTD.

What is pneumatic actuator?

Henan MF Valve Co., Ltd. is a professional manufacturer of high quality valves, and also provides various valve accessories to provide customers with a full range of services and supports. Pneumatic actuator is a device that uses the pressure of compressed air to drive the opening and closing or regulating valves. They are mainly composed of cylinders, pistons, gear shafts, end covers, seals, screws, etc. composition. MF VALVE can produce and supply DA32/ DN40/ DN52/ DN63/ DN75/ DN83/ DN92/ DA105. The connection dimensions comply with the requirements of ISO 5211. Working Principle A port enters into the air, the compressed air pushes the piston outwardto make the actuator output shaft rotate counterclockwise (0°-90°), and the B port exhausts. B port intakes, the compressed air pushes the piston inward to make...

10/052023

Soft Seal Socket Gate Valve

Soft Seal Socket Gate Valve PN16 GGG50 material The main feature of the socket-type soft seal gate valve is that two sockets are provided at both ends of the valve to form a socket connection with the pipe, that is, the pipe is directly inserted into the socket, which is extremely convenient to install. A rubber sealing ring is placed between the pipe and the socket to achieve seal. This kind of connection is different from the flange connection and is called a flexible connection or a stress-free connection. Its advantage is that it allows the pipe to have an appropriate amount of expansion and contraction at the connection with the socket, which can compensate for the change in the length of the pipe. At the same time, it can eliminate the material stress caused by thermal expansion and contraction of the pipe to achieve the purpose of protecting the pipe. Technical Parameters Nominal pressure 1.6MPa(16kgf/cm2) Nominal diameter 63-315mm Seal test pressure 1.76MPa(17.6kgf/cm2) Strength test pressure 2.4MPa(24kgf/cm2) Applicable temperature ≤120℃ Applicable media Water, oil Operation Manual Main parts material: Part Name Material Body & Bonnet Ductile Iron Disc Ductile iron + rubber Stem Stainless steel Valve...

09/232023

Non Rising Stem Gate Valve & Rising Stem Gate Valve

Gate valves are classified according to the type of stem, which can be divided into two types: Non-rising stem gate valve and Rising stem gate valve. Non-rising stem gate valve ♦ Non-rising stems are threaded into the gate, and rotate with the wedge rising and lowering inside the valve. They take up less vertical space since the stem is kept within the valve body. Generally, an open-close indicator should be installed to indicate the degree of open-close. Advantage:...

09/052023

Analyze the advantages and disadvantages of gate valve

GATE VALVE Gate valve is a kind of valve with wide application in the pipeline, which mainly plays the role of connecting and cutting off the medium. The direction of movement of the gate valve is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. Advantages 1. Small flow resistance. The medium channel inside the valve body is straight through, the medium flows in a straight line, and the flow resistance is small. 2. The sealing performance is better than that of the stop valve, and the opening and closing is also less labor-saving than the stop valve. 3. The gate valve is a valve with double flow direction, which is not restricted by the flow direction of the medium, so it is suitable for pipelines where the medium may change the flow direction, and it is also easy to install. 4. The shape is simple, the structure length is short, the manufacturing process is good, and the application range is wide. Disadvantage 1. The overall size and opening height are large. Large space is required for installation. 2....

08/192023

Butterfly Valve Maintenance Instructions

1. Preparation before shipping The valve side channel and stem exposed surface are the key parts,should take the following measures: (a)the inside of the valve shall be cleared of scale and keep the inner cavity clean and dry. (b)the surface of the valve should be coated with anti-rust oil. (c)the valve should prevent flange surface and other mechanical damage. (d)the valve opening should be closed. 2. Handling When handling valves should be properly noted, the valve must not be thrown or dropped, especially if the handwheel and stem should not be the lifting or suspension points of large valves. 3. Storage The problem of storage should be the same as transportation preparation. But the time factor is very important, general butterfly valve of the deposit period, according to the expiration of the seal material to determine if be prolonging the valve a few weeks or months, you need to cost to improve the original storage conditions. Valves are normally stored indoors, and the actual temperature of the valve is always above the dew point temperature. lf the valve must be stored outside, it should...

08/052023

What is double eccentric butterfly valve？

Double Eccentric Butterfly Valve Structural features:The axis of the valve stem deviates from both the center of the butterfly disc and the center of the body. The effect of double eccentricity enables the butterfly disc to quickly detach from the valve seat after the valve is opened, greatly eliminating unnecessary excessive squeezing and scraping between the butterfly disc and the valve seat, reducing the opening resistance distance, reducing wear, and improving the valve seat life. Double eccentric butterfly valves are mainly used for water drainage in water plants, power plants, steel smelting, chemical industry, water source engineering, environmental facility construction, etc. Advantages: 1. Reasonable design, compact structure, easy assembly and disassembly, and convenient maintenance. 2. The eccentric structure is used to reduce the friction of the sealing ring and prolong the service life of the valve. 3. Completely sealed with zero leakage. Can be used in ultra-high vacuum conditions. 4. Replacement of valve disc sealing ring, butterfly disc, shaft and other materials can be applied to a variety of media and different temperatures. Standard: 1.Design and manufacture as per BS EN593 2.Face to face dimensions as per BS EN558 Series 13/14 3.Flange dimensions as per BS EN1092-2 4.Pressure test as...

07/222023