High Strength Customized OEM No Lead Brass Double Hole Pitless Adapter for Pump Accessories
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- Supplier: Qingdao Zehan Machinery Manufacturing Co. Ltd.
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Product Name | High Strength Customized OEM No Lead Brass Double Hole Pitless Adapter for Pump Accessories |
Quality Assurance | ISO9001:2015 Certified |
Aluminum Alloy:5052 /6061/ 6063 / 2017 / 7075 / etc. | |
Brass Alloy:3600/ 3602 / 2604 / H59 / H62 / etc. | |
Stainless Steel Alloy:303 / 304 / 316 / 412 / etc. | |
Steel Alloy:Carbon Steel / Die Steel / etc. | |
Other Special Materials:Lucite / Nylon / Bakelite / etc. | |
We handle many other type of materials. Please contact us if your required material is not listed above. | |
Surface Treatment | Blacking,polishing,anodize,chrome plating,zinc plating,nickel plating,tinting |
1. Construction: lifting anchors for precast concrete, spherical head anchors 2. Automotive industry: piston, connecting rods, cams, camshafts, crankshafts 3. Heavy machinery: Rock breaker, excavator parts 4. Energy: Anvil, gate valve, wellhead control EQP, wellhead EQP 5. Defense: Black receiver, aluminum trigger guards and receivers 6. Truck: Cylinder heads, oil sump, clutch housing, front and rear brake calipers. | |
Inspection | Caliper, Inner diameter micrometer, OD diameter, height vernier caliper, Hardness tester, Ring gauge, Infrared spectrometer, Profile projector machine, Coordinate measuring machine, Roughness meter, Visual quality standards etc. |
File Formats | ISO9001:2015 Certified |
Machining Equipment | Machining Center / CNC Lathes / Grinding Machines / Milling Machines / Lathes / Stamping Machines/ Full Automatic Lathe /etc. |
1. High Precision, New Technology, Competitive Price for Casting and machining 2. Advanced casting machines available. 3. All kinds of facility, CNC machining, turning, milling, tapping, drilling, polishing, punching, etc... 4. Competitive Prices, Excellent Service, and Good Lead Time. 5. 100% full inspection before shipment. 6. Less than 3% on-time delivery rate. |
Company profile
Qingdao Zehan Machinery Manufacturing Co., Ltd is an export-oriented high-tech enterprise specializing in fabrication of high-end metal parts, keeping a long-term and stably strategic cooperation with a number of world-famous enterprises since 2006. Our products are widely used in precision equipment, engineering machinery, construction, power facility, medical, animal husbandry, aviation, rail traffic and other industries. They have been widely sold in high-end market like North American and European countries.
Zehan has employee forces with excellent professional competence, strong executive ability, and high working efficiency. More than 80% of them achieved junior college degree or above. In addition to the standard regulation and professional guidance of daily production work, Zehan also provides，employees with regular training on technical basic theory and practical operation technology for years, which improves the front-line employees' overall professional quality while they working, and further improves the products‘ quality and stability. It is our consistent tenet to pursue quality and make every product with high-quality materials, scientific design and exquisite process.
Qingdao Zehan Machinery Manufacturing Co., Ltd. sincerely welcomes more friends to cooperate with us, and create a better future together.
Zehan has employee forces with excellent professional competence, strong executive ability, and high working efficiency. More than 80% of them achieved junior college degree or above. In addition to the standard regulation and professional guidance of daily production work, Zehan also provides，employees with regular training on technical basic theory and practical operation technology for years, which improves the front-line employees' overall professional quality while they working, and further improves the products‘ quality and stability. It is our consistent tenet to pursue quality and make every product with high-quality materials, scientific design and exquisite process.
Qingdao Zehan Machinery Manufacturing Co., Ltd. sincerely welcomes more friends to cooperate with us, and create a better future together.
Processing Capability
Testing Equipment
Manufacturing Process
Application Field
FAQ
1. How to prevent the formation of air holes in castings?
The effective methods to prevent bubbles are: reducing the gas content in the metal liquid, increasing the air permeability of sand mold, and adding an air riser at the top of the mold cavity.
2. How to avoid the situation of sticky sand?
The surface of the casting is adhered to a layer of sand which is difficult to remove.It not only affects the appearance of casting, but also increases the workload of casting cleaning and cutting, and even affects the life of the machine.The method to prevent the formation of sand is to add coal powder in molding sand, and to brush the surface of the cast mold with anti-sand paint.
3. How to identify shrinkage?
(1) Observe the surface shape of casting defects. If the surface is uneven, very rough, and dark gray, the hole with irregular shape is shrinkage cavity.
(2) If the location of the hole is at the final solidification thickening of the casting, or at the hot spot where the two walls intersect, and is located in the middle or upper part of the section, it is a shrinkage cavity.
(3) The most concentrated hole defects on the thick and large section of steel castings are shrinkage or air shrinkage.
4. How to prevent sand expansion?
In order to prevent sand expansion, the strength of sand mold and the rigidity of sand box should be increased, and the pressing
force or fastening force when closing the box should be increased. In addition, the pouring temperature should be reduced to make
the surface of molten metal crust earlier, so as to reduce the pressure of molten metal on the mold.
5. How to prevent sand inclusion?
Sand inclusion is a kind of groove and scar defect formed on the surface of castings, which is very easy to produce in wet mold
casting of heavy plate castings. Avoiding large plane structure can effectively prevent sand inclusion.
6. How to identify the wrong type, wrong core and off-core?
(1) Dislocation is the defect that one part of the casting is staggered with another part at the parting surface, which is usually caused by inaccurate positioning of the mold.
(2) The core staggering is that the sand cores are staggered at the parting surface, which makes the inner cavity of the casting deform and the outer surface shape of the casting is correct.
(3) Core deviation is caused by improper change of sand core position, which results in casting shape and size inconsistent with the drawing.
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