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Yancheng Longwan Machinery Co., Ltd. HOME / PRODUCTS & APPLICATION / Ductile Cast Iron / Ductile Cast Iron Water Pump Accessories

Ductile Cast Iron Water Pump Accessories Foundry

Ductile Cast Iron is a high-strength and tough cast iron material widely used in the manufacture of water pump accessories. This material is known for its good mechanical properties and corrosion resistance, and is suitable for applications that need to withstand high pressure and high temperature environments. Ductile iron water pump accessories are widely used in industrial and municipal water supply systems, and their stable material properties ensure long-term reliable operation and low maintenance costs.

Ductile Cast Iron Water Pump Accessories OEM/ODM
ABOUT US
Yancheng Longwan Machinery Co., Ltd.
Yancheng Longwan Machinery Co., Ltd.
Founded in 2006, which located next to National Highway 204 in Yancheng City, Jiangsu Province, 40km from the center of Yancheng City, 5km from the center of Dongtai City, 30km from Dafeng District, and 10km from the exit of Baiju Expressway, with convenient transportation. We mainly produce various types of fire-fighting pipe fittings, reducer parts, auto parts, agricultural machinery, and industrial robot parts. Its main customers include SAIC Group, Deere, Bonfiglioli (China), Shanghai Beixu, Yaskawa Electric, etc. As a famous China Ductile Cast Iron Water Pump Accessories Foundry and Ductile Cast Iron Water Pump Accessories Suppliers, our company has a variety of molding equipment, including one vertical sand-shot horizontal parting boxless shot-press molding line with specifications of 610*510*240, 120 boxes/hour, suitable for mass production of small parts; one upper and lower sand-shot horizontal parting boxless shot-press molding line with specifications of 750*650*250, 100 boxes/hour, suitable for mass production of small and medium-sized parts; 3 sets of 1.25T medium-frequency electric furnaces; 3 cleaning shot blasting machines, and now planning a lost foam production line, suitable for 100Kg~1000Kg casting production, and planning an automatic spray painting line and an electrophoretic coating line at the same time, 3 CNC lathes and 3 lathes.
Yancheng Longwan Machinery Co., Ltd.

ODM Customization Expert

Advanced Production & Processing Equipment

Longwan Machinery has a variety of advanced domestic and foreign molding equipment, including 2 fully automatic production lines for clay sand, 1 semi-automatic production line for clay sand, and 1 coated sand production line, with an annual production capacity of 15,000 tons.

Yancheng Longwan Machinery Co., Ltd.

Complete Inspection Flow

Strict Quality Inspection

We have full-process testing equipment: spectrum analyzer, metallographic microscope, universal tensile testing machine, magnetic particle flaw detector, ultrasonic flaw detector, etc.
The above equipment can fully ensure that we can provide customers with high-precision final castings, and at the same time ensure that we meet customers' comprehensive testing requirements for physical and chemical properties of materials, non-destructive testing, high-precision geometric dimension testing, etc.

Professional Casting Expert

Comprehensive Casting Manufacturer

FAQ
  • Q
    Where are your products mainly exported to?
    A

    Our products are mainly exported to multiple countries such as Germany, Japan, Italy, South Korea, and Australia.
  • Q
    How to deliver the goods to us?
    A

    Usually, we ship by sea, which is very convenient for export.

    Of course, if the customer's goods are urgent, we can also air freight them. Ningbo Airport and Shanghai International Airport are both very close to us.
  • Q
    What's the payment term?
    A

    When quoting, we will confirm the transaction method with you.

    For mass production, we usually make a 50% advance payment in advance and then inspect and confirm the shipment before paying the remaining balance.
  • Q
    How to guarantee the quality of your goods?
    A

    Firstly, there will be corresponding inspections after each process, and for the final completed product, we will conduct a full inspection according to customer requirements and international standards;

    Then, we have advanced and complete top testing equipment in the industry: spectral analyzers, metallographic microscopes, universal tensile testing machines, magnetic particle testing machines, ultrasonic testing machines, etc.

    The above equipment can fully ensure the provision of high-precision final castings to customers, while also meeting the comprehensive testing requirements of customers for material physical and chemical properties, non-destructive testing, high-precision geometric dimension testing, and so on.
  • Q
    How many employees of your company? what about the technicists?
    A

    Our company has more than 120 employees, including 10 professional technicians and 5 engineers.
  • Q
    How about the capacity of your company?
    A

    We have 2 fully automatic clay sand production lines, 1 semi-automatic clay sand production line, and 1 coated sand production line, with an annual production capacity of 15000 tons.
  • Q
    Do you have some standard parts?
    A

    No, currently we produce and customize according to the requirements based on the drawings provided by the customer.
  • Q
    Can you do customized products?
    A

    Yes, we are mainly doing customized products according to the customers’ drawings or samples.
  • Q
    What applications do your products relate to?
    A

    Our products cover almost all the applicable equipment manufacturing and machinery manufacturing and processing fields, mainly including automotive trucks, engineering machinery, agricultural machinery, reducers, water pumps, water treatment systems, and other fields.
  • Q
    what products can you offer?
    A

    We mainly produce cast iron parts made of gray cast iron and ductile iron materials.
  • Q
    Are you a direct manufacturer or trading company?
    A

    We are a foundry and a manufacturer of cast iron parts.
  • Q
    How long can I get the feedbacks after we sent the inquiry?
    A

    We will reply to you within 24 hours of the working day.
NEWS
Ductile Cast Iron Water Pump Accessories Industry knowledge

Yancheng Longwan Machinery Co., Ltd. is a ductile iron foundry and machining plant in Yancheng, Jiangsu, producing Ductile Cast Iron Water Pump Accessories manufacturer supply for pump builders, water utilities, irrigation equipment makers and industrial plants. We cast and finish impellers, volutes, casings, bearing housings, seal components, connection flanges and pump bases to customer drawings or samples, in prototype, trial and repeat production quantities.

Founded in 2006, the works covers 33,300 m² with more than 120 employees, including 10 technicians and 5 engineers. Ductile iron is melted in three 1.25 T medium-frequency electric furnaces and poured on automated clay sand and coated sand molding lines, with machining carried out on CNC lathes and lathes in the same plant. Our quality system follows IATF 16949:2016.

Ductile Cast Iron Water Pump Accessories We Cast and Machine

The accessory range follows the working point of the pump: pressure containment, shaft location, sealing interface and mounting geometry. Each part is quoted from the drawing, with the molding line chosen to suit its geometry and annual volume. Parts within our Ductile Cast Iron range are supplied as-cast, shot blasted or fully machined, depending on the interface the part has to meet.

Component Function in the pump Casting and machining notes Typical service
Impeller Imparts kinetic energy to the fluid and sets head and flow. Cast vane profile; hub, eye and shroud faces machined for fit and balance. Municipal supply, irrigation, fire pumps.
Volute and casing Collects flow and converts velocity into pressure. Wall thickness controlled for pressure load; nozzle and mounting faces machined. Water treatment, process water, industrial pumping.
Bearing housing Locates the shaft and carries bearing loads. Bore concentricity and foot flatness held; bores turned on CNC lathes. Continuous-duty and packaged pump sets.
Seal cover and gland Contains the shaft sealing interface. Bore and face tolerances machined; flatness verified before assembly. Process, chemical and industrial duty.
Pump base and bedplate Aligns pump and driver on a common frame. Pad flatness, hole pattern and overall geometry cast close to final shape. Skid-mounted and packaged units.
Adapter and connection flange Joins casing to piping or motor support. Bolt circle, face and drilling machined to drawing. Municipal and irrigation installations.

Where a project uses both pump and valve castings, our Ductile Cast Iron Valve Accessories are produced under the same melting, molding and inspection flow, which keeps material and dimensional consistency across a skid or packaged set.

Application Fit Across Water Pump Duties

Municipal water systems move large volumes through pumps that run for long periods, so impellers, housings, bearing locations and seal covers must resist dynamic stress and the chemistry of the water being pumped. Irrigation duty adds abrasion, humidity, frost and fertilizer or pesticide exposure, which places more demand on corrosion performance and external finish. Industrial pumping — water treatment, petrochemical, power generation and metallurgy — brings higher temperatures, pressures and aggressive media, where the toughness of ductile iron against impact and thermal load is a practical advantage.

Fire-fighting pumps add short-duration high-pressure and high-temperature conditions to the same component set. For these duties the casting must hold pressure integrity and keep the impeller, volute and bearing housing aligned after repeated starts. Our grey iron range covers applications where lower strength is acceptable and vibration damping or machinability is the priority; Grey Cast Iron Water Pump Accessories remain available as a parallel material option where the pump duty permits it.

Material Selection and Melt Control

Grade selection follows the drawing and the failure mode the part has to resist. A ferritic ductile iron suits components needing elongation and impact resistance at lower temperatures; a pearlitic grade is chosen where hardness, strength and wear resistance dominate, such as wear rings or shaft-contact areas. Nodularity, matrix and chemistry are controlled at the furnace rather than corrected after casting.

  • Three 1.25 T medium-frequency electric furnaces for melt control and grade changes.
  • German SPECTRO direct-reading spectrometer for chemical composition before pouring.
  • Tensile testing machine, 3T Brinell hardness tester, sonic velocity meter and metallographic microscope for mechanical and microstructural verification.
  • Molding sand testing equipment — SAC hammer-type sample making machine, SWY hydraulic strength tester, SSZ vibration sand screening machine and SGS double-disc infrared dryer — to keep moulding consistency stable across batches.

For pump casings and volutes, section thickness and feeding are reviewed against the pressure class and machining allowance so that shrinkage-prone areas are not left in the final wall.

Molding Lines and Production Capacity

The molding asset is matched to the part size, geometry and annual volume at the quotation stage. Small accessories and high-run parts go onto the faster boxless line; housings and volutes with cores and larger footprints run on the 750 × 650 × 250 mm line.

Molding asset Flask / mould size Rate Best fit
Vertical sand-shot horizontal parting boxless line 610 × 510 × 240 mm 120 boxes/hour High-volume small accessories: impellers, seal covers, small connection flanges.
Upper/lower sand-shot horizontal parting boxless line 750 × 650 × 250 mm 100 boxes/hour Small and medium housings, volutes, bearing housings.
Clay sand lines — 2 automatic, 1 semi-automatic Project dependent Repeat production Stable output across the accessory range.
Coated sand line Project dependent Core-intensive parts Internal passages and surfaces needing better definition.

Combined annual casting capacity is 15,000 tonnes, supported by three cleaning shot blasting machines, three CNC lathes and three lathes for finishing.

Tooling, Machining and Finishing

Patterns and core boxes are produced after drawing confirmation, and a sample casting is submitted for approval before mass production begins. This sequence keeps the tooling decision tied to the actual pump interface rather than to a nominal shape.

  • As-cast, shot blasted or fully machined supply.
  • CNC turning for bearing bores, seal covers, hub and eye fits, and flange faces.
  • Drilling and tapping of bolt circles and mounting pads.
  • Masking of sealing faces and machined surfaces before surface treatment.
  • Part marking to drawing or customer identification requirement.

Inspection, Acceptance and Documentation

Inspection runs through the process: raw materials are checked on receipt, in-process checks follow each molding, fettling and machining stage, and finished parts receive full inspection against customer requirements and international standards. The laboratory equipment confirms material properties, while magnetic particle and ultrasonic flaw detection cover specified non-destructive testing.

  • Chemical composition by direct-reading spectrometer.
  • Tensile strength and elongation from cast test bars.
  • Brinell hardness on the 3T tester.
  • Nodularity and matrix review by metallographic microscope and sonic velocity meter.
  • Dimensional inspection of machined interfaces before packing.

Reports are issued to the scope agreed at order: material certificates, hardness and tensile results, dimensional records, NDT reports and sample approval documentation. Our IATF 16949:2016 system standard governs traceability and continuous quality stability through the production flow.

Information We Use to Configure Your Solution

We prepare the casting process, machining scope and quotation from the project data below. Where a drawing is not yet available, a sample with measurable wear limits is enough to start the pattern review.

Project input What we need
Drawing or sample 2D/3D drawing with revision status, or a physical sample with critical dimensions identified.
Material grade Ductile iron grade, required tensile and elongation, hardness range, microstructure or nodularity requirement.
Pump duty Fluid, temperature, pressure class, flow and head, continuous or intermittent operation.
Interfaces Flange standard, bolt circle, bore and seal fits, mounting footprint, shaft centre height.
Machining scope As-cast, partially or fully machined; datums, tolerances, GD&T callouts and balance requirement.
Testing and records Chemical, mechanical, hardness, dimensional or NDT reports; sample approval requirements.
Volume and schedule Prototype, trial batch, annual volume, release pattern and delivery destination.
Packaging and marking Returnable or export packing, pallet configuration, part identification and documentation language.

ODM Project Flow

  1. Drawing or sample review, process route and quotation confirmation.
  2. Pattern and core box manufacture after tooling order.
  3. Sample castings produced and sent for customer confirmation.
  4. Mass production on the selected molding line.
  5. In-process and final inspection, with customer inspection welcomed at completion.
  6. Packing and shipment by sea, or air freight for urgent items.

Frequently Asked Questions

Do you hold standard water pump accessories in stock?

We manufacture to customer drawings or samples rather than from a standard catalogue. The pattern, core box and machining fixtures are developed for the specific impeller, casing, housing or base being supplied.

Which ductile iron grades can you pour?

We pour to the grade and property callout on the drawing. Chemistry is verified on the SPECTRO spectrometer before pouring, and tensile, Brinell hardness, metallographic and sonic velocity checks confirm the supplied material. Grade confirmation forms part of the quotation.

How is the first article approved?

After drawing confirmation we produce the pattern and submit sample castings for your approval. Mass production starts only after the sample has been confirmed, and the approved sample becomes the reference for later inspection.

What production capacity is available for pump accessories?

Annual casting capacity is 15,000 tonnes, using two fully automatic clay sand lines, one semi-automatic clay sand line and one coated sand line, with boxless molding lines at 610 × 510 × 240 mm and 750 × 650 × 250 mm. Three 1.25 T furnaces, three shot blasting machines, three CNC lathes and three lathes support the casting and finishing flow.

What inspection documentation accompanies a shipment?

Finished parts receive full inspection against customer requirements and international standards before packing. Documentation follows the agreed scope and can include material certificates, tensile and hardness results, dimensional records, and magnetic particle or ultrasonic testing reports where specified.

Which markets do you currently serve?

Our castings are exported to Germany, Japan, Italy, South Korea and Australia, among other markets. Pump accessories normally ship by sea, with air freight available through Ningbo and Shanghai airports when a delivery is urgent.