| Specification | Customized Aluminum CNC Machining Parts, CNC Milling Aluminum Parts |
| Material | Stainless steel, copper, brass, carbon steel, aluminum (according to customer's requirement. |
| Surface Treatment | Zn-plating, Ni-plating, Cr-plating, Tin-plating, copper-plating, the wreath oxygen resin spraying, the heat disposing, hot-dip galvanizing, black oxide coating, painting, powdering, color zinc-plated, blue black zinc-plated, rust preventive oil, titanium alloy galvanized, silver plating, plastic, electroplating, anodizing etc. |
| Main Products | Precision screw,bolt, nuts,fastener,knob,pins, bushing, sleeve,gear, stamping parts,washer,gasket, plastic molding injection parts, standoff,CNC machining service,accessories etc. |
| Producing Equipment | CNC machine , automatic lathe machine,stamping machine,CNC milling machine,rolling machine,lasering,tag grinding machine etc. |
| Available Certificate | RoHS, SGS, Material Certification |
| Testing Equipment | Projecting apparatus, Salt Spray Test, Durometer, and Coating thickness tester , 2D projector |
| Lead time | 10-15 working days as usual,It will based on the detailed order quantity. |
| Managing Returned Goods | With quality problem or deviation from drawings |
| Delivery of Samples | By DHL, Fedex, UPS, TNT, EMS |
| Warranty | Replacement at all our cost for rejected products |
| Main Markets | North America, South America, Eastern Europe , West Europe , North Europe, South Europe, Asia |
| How to order | * You send us drawing or sample * We carry through project assessment * We give you our design for your confirmation * We make the sample and send it to you after you     confirmed our design * You confirm the sample then place an order and pay us 30% deposit * We start producing * When the goods is done, you pay us the balance after you confirmed pictures or tracking numbers. |
| place of origin | NingBo |
| Applications | Toy,Automotive, instrument, electrical equipment, household appliances, furniture, mechanical equipment, daily living equipment, electronic sports equipment, light industry products, sanitation machinery, market/ hotel equipment supplies, artware etc. |
1) Are you a factory or trade company?
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We are factory, so we can offer you very competitive price and very fast lead time. Our sample lead time is 3~7 days and mass production lead time is 15~20 days.
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2) Whether some samples can be provided?
Yes. Samples can provided. Just need some sample cost and we'll return it back when proceed into mass   production.
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3) Will my drawing be safe after you get it?
Yes. We will not release your design to the third party unless with your permission.
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4) How to deal with the parts received when they are found to be in poor quality?
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Please rest assured that all our products are QC inspected and accepted with inspection report before delivery and generally there will no non-conformance; in case of non-conformance, please contact us immediately, take some pictures, we will check on the problems and have them reworked or repaired at the first time. The resulting transportation costs are borne by our company.
A Check Valve is also called Non-return Valve, that allows fluid to flow through it in only one direction. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem.
There are various types of check valves used in a wide variety of applications, e.g. swing check valves, piston check valves(lift check valves), wafer check valves(dual-plate and single-plate), tilting disc check valves. They provide various flow rates, closure times and mounting positions for different pipelines.
Check valves are used in many fluid systems such as those in chemical, and power plants, and in many other industrial processes. Kolink check valves can be with flanged ends, butt weld ends, socket weld ends and screwed ends, and are constructed with various materials of cast carbon steel, stainless steel, alloy steels, and forged steels.
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| Swing Check Valve | Wafer Type Check Valve | Forged Steel Check Valve | Piston Check Valve |
The Cross-section of a Typical Cast Steel Swing Check Valve:
1) A hinge and hinge pin mounted to permit free movement of the disc.
2) Renewable welded-in or screwed-in seats provide a bubble tight joint.
3) Standard swing disc type, used in horizontal position for liquid application.
4) Internal hinge design eliminates body penetration and eases maintenance since all parts are accessible from the top. Through-body hinge Pin design also available for extra lever, counter weighter and damper.
Check Valve
Swing Check Valve, Piston Check Valve Manufacturer, Wafer Check Valve Supplier, Forged Steel Check Valve, Lift Check Valve, Stainless Steel Check Valve, Double Check Valve
Wenzhou Kolink Valve Co., Ltd. , http://www.kolinkvalves.com