Der Hersteller von rostfreien Gussteilen von JM produziert Arten von Graugussteilen, duktilen Gussteilen und Stahlgusszubehör in vielen automatischen Industrien. Derzeit unterteilt JM sie in Architekturgussteile, Autozubehörgussteile, Gusseisenpfanne, Baumaschinen, Gabelstaplerguss, Rohrteile und Mannlochdeckel, Pumpen- und Ventilgussteile, Solarguss, Traktoren- und Landwirtschaftsgussteile und JM-Patent Wärmetauscher für Klimaanlage.
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FAQ-Leitfaden für Pumpen- und Ventilguss
How to Place Order about Pump Casting and Valve Casting from Yide Foundry
Yide Foundry can provide accurate cost and time estimates for your custom castings.
We can produce high-quality custom metal castings that meet your requirements.
We will work with you to determine the product project, and then recommend the most economical materials and production methods.
First of all, please determine whether the product you need is suitable for our professional field according to the following factors:
Yide Foundry can use a variety of metal alloys, including ductile iron, gray cast iron, cast steel, stainless steel, mild steel and aluminum.
Custom castings will require production designs and new mould. Does your project have enough volume to rationalize customization?
Yide Foundry has our own casting factory covering an area of 20000 sqm, with over 200 employees. We provide mold designing, shell casting, sand casting, and finish machining service according to your requirements.
Yide Foundry has enough ability to manufacture clay sand casting& precoated sand casting capacity over 20,000 tons.
Request a quote
Once you have determined that Yide Foundry is a manufacturer that meets your requirements. Then, the next step is to collect the informations of the product.
Custom metal casting is a complex process. The success depends on the communication and detailed control of the entire process.
You should consider the following information in your request for quotation.
Please provide the drawings and specifications of the casting, including (but not limited to):
- Dimensions and geometry
- Acceptable dimensional tolerances
- Stress / load requirements
- Machining requirements
- Non-destructive test requirements
Please send the information to firstname.lastname@example.org
You can list specific metal grades, preferred materials or required properties.
Due to the inherent cost of the metal/alloy and its castability, the cost is greatly affected by the material selected.
Actual or estimated weight
Used to calculate the cost of purchasing materials, processing and transportation. Actual weight is preferred because inaccurate estimates may cause discrepancies between estimated and actual costs.
If existing mould is available, casting costs can be reduced.
If not, the design of the mould will constitute the main cost. Paying higher fees for complex mould can reduce casting costs and improve casting quality.
Include current and future expected quantities. The quantity has a great influence on production methods, tool development and total cost.
Casting surface finish (smoothness) requirements, material performance test standards and casting robustness are all key considerations for quotation.
ASTM provides the tools necessary to establish inspection standards. Most mechanical tests are performed on representative test rods.
Additional non-standard inspection requirements increase the cost of casting.
It can be expedited, but it will also increase the cost
Yide Foundry can provide secondary processing operations:
- Heat treatment
We prepare and package all products to protect them during transportation and storage.
Special requirements will increase the cost of transportation and must be notified in advance.
Through communication with our professionals, we can best understand the functions and costs of castings. Our casting experts will work with you to outline product solutions and help you realize them in the most economical way.
Is your casting information ready? Request a quote here! email@example.com
Why Choose Yide Casting Foundry for Pump Castings
- When choosing a casting foundry, we need to figure out the following points.
First of all, we need to know the strength of the manufacturer. Generally, we can observe the manufacturer’s production ability and factory scale. At the same time, we can also learn about the reputation of the foundry from the peers or the media.
- When buying ductile cast iron parts, we cannot just look at the price, but also need to know about the product quality, service and casting technology.
In the production process of large-scale ductile castings, we generally use resin sand technology. Meanwhile, we use inspection equipment to strictly monitor the grades of ductile iron castings.Thus can improve the properties of ductile iron castings, and strengthen the product’s tensile and impact resistance is greatly.
- Zhejiang Yide Machinery Co,. Ltd. is a newborn company from Ninghai Jinma (JM)Casting Foundry, founded in 1993.
As an established company with a long history and strong professional and technical strength, Jinma has enough ability to manufacture clay sand casting & precoated sand casting capacity over 20,000 tons, with the main products: Automobile Casting, Truck Casting, Cast Iron Fire Truck, Cast Iron Toy Tractors, Forklift Parts Casting/Hand Lift Casting, Agricultural Machinery Casting, Construction Industry Casting, Brass Casting, Bronze Casting, and Heat exchangers.
Thus Yide is always committed to providing high quality but factory price customized casting services for more and more customers in the whole world.
What is Pump and Valve?
Pump and valve is a collective term for pumps and valves, and is an industrial equipment used in liquid transportation.
The reason why pumps and valves are often linked together is their applications. In other words, where there are pumps, there are usually valves; and where there are valves, pumps are often needed.
Pump and valve are generally used to transport liquid, also for gases at times, such as vacuum pumps.
What are Types of Pumps?
Pumps falls into the following three main types according to their working principles:
1. Positive displacement pump
The movement of the working parts causes the working volume to periodically increase and decrease to suck and discharge the liquid. And the pressure of the working parts directly increases the pressure energy of the liquid.
According to the different movement modes of the moving parts, there are reciprocating pump and rotary pump.
According to the structure of the moving parts, there are piston pumps, plunger, gear, screw, vane and water ring pumps.
2. Impeller pump
Impeller pumps rely on the impeller to drive the liquid to rotate at a high speed. In order to transfer mechanical energy to the conveyed liquid.
According to the structural characteristics of the impeller and flow channel of the pump, impeller pump falls into:
1) Centrifugal pump
2) Axial pump
3) Mixed-flow pump
4) Peripheral pump
3. Jet pump
The fluid is ejected by a high-speed jet generated by the working fluid. And then the energy of the ejected fluid is increased through momentum exchange.
What are Types of Valves?
Valves have a wide range of uses and types. At present, the most commonly used international classification methods are as follows:
1. According to the structural characteristics and the direction in which the closing part moves relative to the valve seat, valves fall into:
- Sectional shape: The closing piece moves along the center of the valve seat.
- Gate shape: The closing piece moves along the center of the vertical valve seat.
- Plunger and ball shape: The closing piece is a plunger or ball, which rotates around its centerline.
- Swing shape; the closing piece rotates around the axis outside the valve seat.
- Dish shape: the disc of the closing part, which rotates around the axis in the valve seat
- Slide valve shape: The closing piece slides in the direction perpendicular to the channel.
2. According to the driving mode, valves fall into:
- Electric: driven by a motor or other electrical devices.
- Hydraulic: driven by water or oil.
- Pneumatic: use compressed air to drive the valve to open and close.
- Manual: driven by human power with the help of hand wheel, handle, lever or sprocket. When the transmission torque is large, it is equipped with turbine, gear and other reduction devices.
3. According to application, valves fall into:
- Cutting off: used to connect or cut off pipeline media, such as globe valves, gate valves, ball valves, butterfly valves, etc.
- Checking: used to prevent the medium from flowing back, such as a check valve.
- Regulating: used to regulate the pressure and flow of the medium, such as regulating valves and pressure reducing valves.
- Distribution: used to change the flow direction of the medium and distribute the medium, such as three-way cock, distribution valve, slide valve, etc.
- Safety: When the medium pressure exceeds the specified value, it is used to discharge excess medium to ensure the safety of the pipeline system and equipment, such as safety valves and emergency valves.
- Other special purposes: such as traps, vent valves, drain valves, etc.
How does Pumps Work?
The liquid fills the pump casing, and the impeller rotates at high speed. At the same time, the liquid produces high speed under the action of centrifugal force. Then the high speed liquid passes through the gradually enlarged pump casing channel, and the dynamic pressure head is transformed into a static pressure head.
The screw pump is very similar to the gear pump. One screw rotates to drive the other screw. The liquid is intercepted in the meshing chamber, propelled along the rod axis, and then squeezed out to the center.
When the piston moves to the right, the pressure in the cavity is reduced, and the upper valve is pushed down. Thus the lower valve is lifted, and the liquid is sucked in; When the piston moves to the left, the pressure in the cavity increases, and the upper valve is lifted. Thus the lower valve is pressed down, and the liquid is discharged.
The teeth of the two gears are separated from each other to form a low pressure, and the liquid is sucked in and pushed to the other side by the shell wall. The two gears on the other side close together to form a high pressure to discharge the liquid.
When the rotor rotates, under the action of centrifugal force and pressure oil, the tips of the blades are closely attached to the inner surface of the stator. In this way, the working volume formed by the inner surfaces of the two blades, the rotor and the stator, first sucks oil from small to large, and then discharges oil from large to small. When the blades rotate one circle, oil absorption and oil discharge are completed once.
The liquid in the groove of the blade is thrown to the flow channel by centrifugal force and pressurized once; the liquid in the flow channel is thrown out of the groove to form a low pressure, enters the groove again, and pressurizes again. The vortex motion of the groove-flow channel-groove multiple times can obtain a higher pressure head.
How does Valves Work?
The sluice valve controls the valve opening by moving the valve plate up and down. The valve plate is just like a gate. Most sluice valves adopt forced sealing. That is, when the valve is closed, the gate must be forced against the seat by external force to ensure the sealing performance of the surface.
The stop valve core moves up and down to control the valve opening. The stop valve, also known as the cut-off valve, is one of the most widely used valves, and is a forced-sealing valve. Therefore, when the valve is closed, pressure must be applied to the disc to force the sealing surface to not leak.
The structure of the diaphragm valve is very different from the general valves. It is a new type of valve and a special form of shut-off valve. Its opening and closing part is a diaphragm made of soft material, which separates the inner cavity of the valve body from that of the valve cover and the driving part.
The ball valve is mainly used for cutting, distributing and changing the flow direction of the medium in the pipeline. It only needs to rotate 90 degrees and a small torque to close tightly.
The plug valve is a fast-opening and straight-way valve. Because the movement between the rotary sealing surfaces has a wiping effect, and it can completely prevent contact with the flowing medium when it is fully opened. Therefore, itis usually be used for medium with suspended particles.
Butterfly valve, also called flap valve, is a kind of regulating valve with simple structure. It can be used for switch control of low-pressure pipeline media. The closing part (disc or butterfly plate) of butterfly valve is a kind of valve that rotates around the valve shaft to achieve opening and closing.
The plunger valve is composed of valve body, valve cover, valve stem, plunger, hole frame, sealing ring, hand wheel and other parts. When the hand wheel rotates, the valve stem drives the plunger to reciprocate up and down in the middle of the hole frame. In order to complete the valve opening and closing function.
Check valve refers to a valve whose opening and closing parts are circular discs. It rely on its own weight and medium pressure to generate actions to block the back flow of the medium. Check valve is an automatic valve, also known as one-way valve, return valve or isolation valve.
Safety valve is a special valve whose opening and closing parts are normally closed under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, the medium is discharged outside the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value.
The reversing valve is a directional control valve with more than two flow patterns and oil ports. It is a valve that realizes the communication, cut-off and reversal of hydraulic oil flow, as well as pressure unloading and sequential action control.
Industrial Applications of Pumps and Valves
Pumps and valves can be found in many industries, such as:
Water treatment and transportation
Cooling system and heat transfer
Fluid handling and chemical storage
Infrastructure and municipal systems
Oil and gas
Food and beverage
What is the Difference between Pump Control and Valve Control？
In hydraulic control, when using valve control, a quantitative oil pump is used. And the overflow valve determines the working pressure. You cannot change the amount of oil input by various working valves. In other words, you can only adjust the working speed by stages.
Pump control uses a relatively advanced variable oil pump. In addition to the necessary control valves, the variable oil pump provides more room for adjustment of speed and other working conditions. Pump control equipment and technology are relatively advanced, and of course the cost is also high.
In general, valve control equipment is relatively simple, with large losses, low accuracy, and fast response; while pump control is just the opposite.
What Castings are Included in Pump and Valve
The cast iron parts of pump and valve includes:
Pump housing and pump cover;
Valve seat, valve cover, valve body, valve gate, valve heck, valve plug and valve rotary control;
Producing Process of Cast Pump and Valve Parts
Pump and Valve Parts are generally ductile iron parts.
Because the ductile cast iron has high strength feature, and with good plasticity and toughness. At the same time, ductile cast iron can fully exert the performance of the substrate.
Ductile iron castings are solid metal objects that result from molten ductile iron being poured into voids in a mold.
The ductile iron subsequently cools and solidifies in the shape of the void it occupies.
Are Pumps and Valves Forged or Cast?
Pump and valve parts are usually iron castings.
Cast pump and valve is to melt the metal into a liquid that meets the requirements. And then, pour it into the specified valve model. After cooling, solidification, and cleaning, you can obtain a valve casting with predetermined shape, size and properties.
Forged pump and valve is a processing method that uses forging machinery to apply pressure to metal valve blanks to produce plastic deformation. Thus obtain forgings with certain mechanical properties, shapes and sizes.
Casting has requirements on the material to be processed. Generally, cast iron and aluminum have better casting performance. Casting does not have the many advantages of forging. However, it can manufacture parts with complex shapes. Therefore, iron castings is often used in the manufacture of parts with low mechanical properties.
Difference between Gray Iron Pump Casting and Ductile Pump Casting
Cast iron is generally divided into two categories: gray iron and ductile iron. They are distinguished by the form and structure of the carbon present in the metal. They each have their own unique attributes, making them suitable for different applications.
The graphite form of gray iron is flake. Due to the existence of flake graphite, the gold matrix structure is split and the effective area of load-bearing is reduced. Therefore, its comprehensive mechanical properties are low. However, its vibration damping, wear resistance, castability and machinability are good. Due to its low cost and workability, gray cast iron is often used as an engineering alloy, and in applications such as machine tool mounts, manhole covers, and counterweights.
Ductile Iron has good ductility, and the graphite form is spherical. Because the spheroidal graphite has less cracking effect on the gold matrix. Thus the ductile iron has higher strength, plasticity and toughness. Therefore, ductile iron is often used in auto parts, oil well pumps and cable drums.
In conclusion, pump and valve castings are generally ductile iron.
Should We Use Grey Iron or Ductlie Iron for Pump Casting
Comparison Chart of Gray Iron vs. Ductile Iron
|GRAY IRON||DUCTILE IRON|
|TENSILE STRENGTH||20,000 PSI – 60,000 PSI||MINIMUM 60,000 PSI|
As the properties showed in the the above comparison chart, the ductile cast iron is more suitable for pump castings, thanks to its enhanced ductility.
Which means we should use ductlie iron for pump casting.