WENZHOU DIYE VALVE&FITTINGS CO.,LTD
Pneumatic valve operation method
Pneumatic valves are valves driven by compressed air. According to the control method, pneumatic valves can be divided into two categories: switch type and regulating type. Pneumatic switch type valves include pneumatic actuators, valves, manual operating mechanisms, air source treatment triplets, solenoid valves, limit switches, silencers, quick connectors, air compressors, air pipes and other components. The manual operating mechanism, limit switches, air source treatment triplets, silencers, and quick connectors can be freely selected according to on-site working conditions. Pneumatic
How to make the performance of stainless steel flange ball valves stable
Stainless steel flange ball valve is a widely used universal stainless steel valve in valves, with a large usage and fast consumption. Therefore, reasonable maintenance can improve work efficiency, reduce maintenance time, and save replacement costs. To ensure stable performance and long service life of stainless steel ball valves, attention should be paid to the following factors: 1. If cleaning stainless steel valves, the solvent used must not conflict with the parts to be cleaned and not corrode. If it is
What are the standard forms of American standard globe valves
American standard globe valves mainly include API and ASME standards. ASTM and ASTM are material standards, not standards for the valve itself; Globe valves designed, manufactured, produced, and tested according to American standards are called American standard globe valves. American standard globe valve is a relatively new type of gate valve, which has some unique advantages of its own structure, such as frictionless switch, less prone to sealing wear, and small opening and closing torque. This can reduce the specifications of the equipped actuator. American sta
Installation method and maintenance of lift check valves
Lift check valve refers to a valve that automatically opens and closes the valve disc based on the flow of the medium itself, used to prevent medium backflow. It is also known as a check valve, one-way valve, backflow valve, and backpressure valve. Check valve is an automatic valve that mainly functions to prevent medium backflow, prevent pump and drive motor reversal, and prevent the discharge of container medium. Check valves can also be used on pipelines that provide supply to auxiliary systems whose pressure may rise above the system pressure. Check valves can be mainly divided into swing
The difference between electric gate valves and electric globe valves
Simply put, an electric valve is a valve controlled by an electric actuator to achieve the opening and closing of the valve. It can be divided into two parts: the upper part is an electric actuator, and the lower part is a valve. The action force distance is larger than that of electric valves, and the opening and closing speed of electric gate valves can be adjusted. The structure is simple and easy to maintain. During the action process, due to the buffering characteristics of the gas itself, it is not easy to be damaged due to jamming. However, there must be an air source, and its con
The difference between plunger valve and globe valve
he closure of the plunger valve is composed of a stainless steel plunger, two elastic sealing rings on top and bottom, and a metal partition frame. The sealing effect is achieved by the close fit between the plunger and the sealing ring. The plunger is inserted into the two sealing rings, and the sealing area is much larger than that of a regular globe valve; When opening and closing the plunger valve, the plunger moves slowly in the sealing ring, and the contact surface is almost not worn. When closed, the plunger is inserted into the lower sealing ring, cutting off the flow passage; Wh
The clamp type check valve is a universal one-way fluid valve. It is lightweight, small in size, and easy to install between flanges. The valve is composed of two semi-circular springs and a plate surface inside, which are fixed on the valve body with pins. The spring deformation causes the valve plate to close, and the fluid pressure causes the opening spring to deform quickly, which can protect the pipeline from water hammer damage. The disc stroke of the clamp check valve is short, the disc is lightweight, and it has spring assisted closing, resulting in a fast closing sp
Types of valve body materials and applicable working conditions
There are various types of materials for valve bodies, which are suitable for various working conditions. The commonly used materials for valve bodies include gray cast iron, black core malleable iron, ductile iron, carbon steel, low-temperature carbon steel, alloy steel, austenitic stainless steel, Monel alloy, cast copper alloy, etc.: 1. Gray cast iron gray cast iron is suitable for low-pressure valves with working temperatures between -15~+200 ℃ and nominal pressure PN ≤ 1.6 MPa. 2. Black core malleable cast iron, suitable for medium and low pressure valves with operating temperat
Operating torque of various valves
If the valve actuator is too small, the side cannot generate enough torque to fully operate the valve. Generally speaking, we believe that the required valve operating torque comes from the friction between the metal components of the valve (such as the ball core, valve disc) and the sealing components (valve seat). Many factors, such as valve usage, operating temperature, operating frequency, pipeline and pressure difference, and flow media (lubrication, drying, mud), all affect the valve operating torque. Ball valve operating torque The structur
Introduction to the Process of Valve Hot Casting
With the advancement of technology and the flourishing development of the casting industry, different casting methods have different mold preparation contents. Taking the most widely used sand casting as an example, mold preparation includes two major tasks: material preparation and core making. The various raw materials used for molding and core making in sand casting, such as casting sand, sand binders, and other auxiliary materials, as well as the sand, core sand, coatings, etc. prepared from them, are collectively referred to as molding materials. The task of preparing molding materials is
Safety precautions to be taken when installing several common valves
We know that regardless of the type of valve, it should be operated strictly according to relevant specifications during the installation process. Below, the editor will take four common valves, namely check valves, safety valves, pressure reducing valves, and drain valves, as examples to introduce the safety precautions that need to be taken when installing valves. 1. Check valve: In order to prevent the medium from flowing back after the check valve leaks or fails, which may cause a decrease in product quality,
Structural characteristics of stainless steel globe valves
Stainless steel globe valves belong to forced sealing valves, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to not leak. When the medium enters the valve from below the valve disc, the resistance that needs to be overcome by the operating force is the frictional force between the valve stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open it, so the diameter of the valve stem should be larger, otherwise it will cause the valve stem to bend
Structural characteristics of stainless steel globe valves
1. Advanced structure, reliable sealing, excellent performance, and beautiful appearance. Improved the rigidity of the valve stem, significantly reduced noise and vibration, and improved the service life and performance of the valve. 2. A shut-off valve can be installed at any position in the pipeline, allowing the medium to flow from bottom to top. 3. DN250 and above adopt advanced multiple seals, double supports, guided movement (which can greatly improve resi
Holding points of stainless steel globe valves
1. Stainless steel globe valves have a simpler structure than gate valves and are more convenient to manufacture and maintain. 2. The sealing surface is not easy to wear and scratch, with good sealing performance. There is no relative sliding between the valve disc and the valve body sealing surface during opening and closing, so the wear and scratch are not severe. The sealing performance is good, and the service life is long. 3. When opening and closing, the valve disc stroke is small, so the height of the globe valve is smaller than that of the gate valve, but
Differences in ferrites of various stainless steels
430 ferritic stainless steel Steel with a chromium content of over 12% can prevent oxidation caused by natural factors, and is called stainless steel. It belongs to 430 ferritic stainless steel, with low thermal expansion rate, excellent formability and oxidation resistance. The code in JIS is 430, hence also known as 430 stainless steel. Application of 430 Ferritic Stainless Steel 430 stainless steel (16Cr) is
Analysis of Leakage Causes of Pneumatic Clamping Butterfly Valve
The sealing ring leakage of pneumatic clamp butterfly valves generally includes: valve stem sealing, middle channel sealing, and sealing rings leakage on both sides. Let's first talk about the reasons for the leakage of the sealing ring on the valve stem of the pneumatic ball valve. The operation of the valve stem of the pneumatic clamp butterfly valve is divided into up and down operation and left and right operation. The leakage here is related to frequent loosening of the switch or prolonged use. So what should be done if there is a leakage here? The seal
How to distinguish between one piece, two piece, and three piece stainless steel ball valves?
How to distinguish between one piece, two piece, and three piece stainless steel ball valves? One piece ball valve, two piece ball valve, and three piece ball valve are three different ball valve structures. Distinguishing these three types of imported ball valves can be approached from three aspects: structure, pressure, and cost. The opening and closing part of the inlet ball valve is a sphere that rotates 90 degrees around the axis of the valve stem to achieve the purpose of
How to optimize the performance of stainless steel ball valves
(1) Truncation type: such as gate valves, globe valves, plug valves, ball valves, butterfly valves, needle valves, diaphragm valves, etc. Shutoff valves, also known as closed circuit valves or shut-off valves, are used to connect or cut off the medium in the pipeline. (2) Check valves: such as check valves, also known as one-way valves or check valves. Check valves are automatic valves that prevent media backflow in pipelines, pump and drive motor reversal, and leakage of container media. The bottom valve of the
Valve classification - classified by function and purpose
(1) Truncation type: such as gate valves, globe valves, plug valves, ball valves, butterfly valves, needle valves, diaphragm valves, etc. Shutoff valves, also known as closed circuit valves or shut-off valves, are used to connect or cut off the medium in the pipeline. (2) Check valves: such as check valves, also known as one-way valves or check valves. Check valves are automatic valves that prevent media backflow in pipelines, pump and drive motor reversal, and leakage of container media. The bottom valve of the
What are the precautions for purchasing stainless steel ball valves?
To ball valve, this is a type of valve that is used in many industries. Different valves have different characteristics, and each has its own advantages when used. Among them, stainless steel ball valves are more commonly used. What are the precautions for purchasing stainless steel ball valves from Diye stainless steel ball valve manufacturers? 1. Due to the numerous types of stainless steel ball valves, when purchasing them, we must refer to the environment in which they are used to choose the appropriate product. For example, stainless steel ball valves on n
Stainless steel ball valve: guardian of fluid control
Stainless steel ball valve is an important equipment used for fluid control, which plays a crucial role in industry, construction, and daily life. Let's take a look at the guardian of fluid control - stainless steel ball valve. Firstly, let's understand the structure and working principle of stainless steel ball valves. Stainless steel ball valve is composed of components such as ball, valve cover, sealing gasket, valve stem, and handle. Its main feature is that there is a pore inside the sphere, which can control the flow of fluid through rotation during operation.
How to install stainless steel flange ball valves correctly?
Stainless steel flange ball valves are suitable for multiple industries and are easy to operate. They only need to rotate 90 degrees and apply a small turning torque to achieve tight closure. Its valve body cavity is all equal, providing a small resistance and straight flow path for the medium. The main characteristics of stainless steel flange ball valves are compact structure, convenient operation and maintenance, suitable for common working media such as water, solvents, acids, and natural gas, and also suitable for harsh working conditions such as oxygen, hydrogen peroxide, methane, and et
Characteristics and advantages of stainless steel flange ball valves
Stainless steel flange ball valves are mainly used in places with high requirements for corrosive, pressure, and hygienic environments. Used to cut off or connect the medium in pipelines, different materials are selected and can be applied to various media such as water, steam, oil, liquefied gas, natural gas, coal gas, nitric acid, acetic acid, oxidizing medium, urea, etc. Features of stainless steel flange ball valve products: 1. The fluid resistance is small, and its resistance coefficient is equal to that of pipe sections of the same length.
What are the classifications of stainless steel flange ball valves?
The classification of stainless steel flange ball valves is as follows: 1. Floating ball valve and flange ball valve have a floating ball. Under the action of medium pressure, the displacement that the ball can generate and tightly press on the sealing surface of the outlet end, ensuring the sealing of the outlet end. The structure of floating ball valve is simple and has good sealing performance. 2. Fixed ball valves and flange ball valves have fixed balls, and both have floating seats. When subjected to medium pressure, the seat moves, causing th
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