div header bar


China Member Since: Nov 09, 2020
Vinson Zhang
Room 904, Bona building, No.456 Taikang Middle Road, Yinzhou
Zhejiang, Hangzhou, China

Business Nature


Legal Status


Year Established


Annual Turnover



Hangzhou, China

Main Products

Hydraulic Valves

Recent Transactions


Payment Terms


AAK Industry Co., Ltd is mainly committed to the production of various hydraulic valve blocks, pressure control valves, threaded cartridge valves and other hydraulic products, with perfect processing equipment, mature production technology and professional design team. Since its establishment, our company has been adhering to the service concept of "quality first" and "customer first". Our products are not only supplied to the domestic market, but also exported to Europe, America, Asia and other countries and regions, deeply favored by the majority of customers. Our products are widely used in construction machinery and various hydraulic fields, such as plastic machine, metallurgy, coal mine, lifting and other industries. In order to ensure the quality of products, we chooses high quality alloy steel as the key parts material of hydraulic parts. At the same time, in order to ensure the service life of the products, we carry out corresponding heat treatment on the products according to customer requirements. In pursuit of precision and quality, AAK Industry Co., Ltd will be a first choice. Sincerely welcome new and old customers to contact us for business cooperation and development!

Products Groups

5 Manufacturing Processes Of AAK Hydraulic Valve Block, 5 Parameters Ahead Of Peers Not Only 5 Steps
5 Manufacturing Processes of AAK Hydraulic Valve Block, 5 Parameters Ahead of Peers Not Only 5 Steps
Price: Inquire
1pc piece (Min. Order)
AAK Hydraulic Valve Spool Never Leaks, Customer Promoted To Head Of Spain Headquarters In China
AAK hydraulic valve spool never leaks, customer promoted to head of Spain headquarters in China
Price: Inquire
600pcs piece (Min. Order)
AAK Hydraulic Valve Adopts Imported Spring. Russian Customer Orders Millions Of Dollars After Comparing With Many Other Companies
AAK hydraulic valve has already used Korean harp steel wire as the pressure spring of hydraulic valve, while only a few factories in the same industry are using it. Russian customers came to our factory to make customized samples and then return home. After half a year of sample comparison, AAK hydraulic valve has been able to overcome domestic and foreign competitors, so far it has bring us a cumulative order of millions of dollars.
Price: Inquire
600pcs piece (Min. Order)
AAK Was Awarded A Big Order Of Cartridge Valves By HydraForce
For two years, by re-mading the samples for four times and changed the materials for three times, AAK samples successfully passed the parameter tests, stand out from many domestic hydraulic valve suppliers, and received a large order for the cartridge valves from the agent of HydraForce, which made us the top supplier of HydraForce in China.
Price: Inquire
600pcs piece (Min. Order)
Hydraulic Valve Spool
The quality of the valve spool can only be measured and compared from the 4 main aspects: the movement sensitivity, stability, no leakage and long service life of the spool in the valve body. The 6 processing procedures and 6 parameters of AAK valve spool also impressed Russian customers.   At present, some of the valve spools used by the hydraulic valve manufacturers are purchased outside from the valve spool factory, which is the common market goods well known in the hydraulic valve industry, with high output and low price. There are also hydraulic valve manufacturers that produce valve spools themselves, but the workshop only produces and tests according to the process sheet of the production department, and basically does not consider the type of hydraulic valve, hydraulic force on the valve spool, flow coefficient of the valve spool, pressure and flow characteristics, service scenarios of the hydraulic valve, and media. That is to use the same production standard to produce all different types of valve spools.   Boris from Russia is mainly responsible for purchasing high-end hydraulic valves, and some requirements are jokingly called curiosity by peers. Due to restriction of production process or lack of awareness of quality control, many hydraulic valve manufacturers dare not accept his orders. Just last month, our old customer, Erin, brought Boris to our company. I was surprised at the moment we met. Maybe he was really worried and went straight to the subject, there was an order for hydraulic flow valve that couldn't pass the inspection, and then took out 5 samples of hydraulic flow valve.   We conducted simulation tests according to the service scenarios, media and parameter requirements of the flow valve provided by him. The test results of the flow valve are not optimistic, the valve spool is stuck, slightly leak and unstable. Boris spread his hands, what's the solution? I joked and asked him why you came to us all of a sudden. He pointed to Erin. She told me that if multiple factories failed to make qualified samples continuously, you could only try AAK Hydraulic Valve. I told him directly that Erin was right and you were right to come here. The valve spools of these flow valves are not accurate enough. Give me 10 days and we will give you 5 high-precision flow valves.   10 days later, his Shanghai Office received 5 samples of our high-precision flow valves. 2 days later, Boris asked us how long it would take to produce 10,000 flow valves. It seems that the sample quality of AAK flow valve has convinced him.   Why can AAK Hydraulic Valve produce the flow valve that the peers can't or don't want to produce? AAK Hydraulic Valve not only has 6 processes, but also 6 parameter indexes as quality assurance:   1. Rough machining of valve spool, select appropriate bar material, cut the size, normalize and quench and temper. Parameter requirements: hardness above 32HRC.   2. Finish machining for the first time, flat end face, drill the center hole, the core is in the hole row, and the hole accuracy. Parameter requirements: the accuracy shall not be higher than 0.005mm, and the surface roughness Ra value shall not be higher than 0.16 μ m.   3. Step 3: the semi-finished work piece is subject to vacuum quenching unique to AAK and then stabilized. It is required to be cold treated at - 80 ℃ for 2h, aging temperature of 420 ℃ and heat preservation of more than 10h. Parameter requirements: hardness above 66HRC.   4. Finish machining again. First rough grind the outer circle and each end face of the shoulder. The core is the size matching between the outer circle and shoulder of the valve spool and the valve sleeve. Different clearance dimensions are implemented according to different hydraulic valves. Parameter requirements: no more than 0.005--0.035mm   5. Grind the outer circle carefully, after stabilizing the work piece, then grind the center hole of valve spool. Parameter: surface roughness Ra value is not higher than 0.1 μ m.   6. Finishing. For the high precision hydraulic valve, we adopt mirror grinding and finishing, double wheel honing, and our peers basically adopts fine grinding. Parameter requirements: surface roughness Ra value is not higher than 0.01 μ m.   After all valve spool processes are completed, our valve spool Ra value is 0.01 μ m. Ra value of valve spool of most peers is 0.08 μ m. Ra value of valve spool of a few peers is 0.02 μ m. The comparison of these values is the embodiment of our valve spool process strength.   AAK Hydraulic Valve spool has 6 processes and 6 parameters, which has taken 6 steps ahead of its peers. AAK Hydraulic Valve precision parameters, peers may be able to think of, but in most cases cannot achieve it, you are encouraged to have a small try with AAK Hydraulic Valve.
Price: Inquire
1 pc (Min. Order)
With Zero Leakage AAK Hydraulic Valve, The Russian Buyer Elaine Is No Longer Concerned About Quality And Promoted
Elaine, a buyer in Russia, did not expect that nearly 30% of the hydraulic valves had oil leakage and poor sensitivity during the inspection of the orders that she had always paid great attention to. Before production,she emphasized the importance of the quality again and again, but there were still problems later. The supplier didn't have the equipment of pressure test bench, so they packed and shipped directly after production, then many problems came out. Fortunately, problems are found in the inspection process, which can avoid the loss later, but the delivery time is approaching. At present, she is eager to find a new supplier, looking around, struggling.   The current situation of the industry is that 90% of the small and medium-sized hydraulic valve factories either do not have pressure test bench, or use the test bench as decoration. Because the test process of the pressure test bench is really complicated, after the pressure testing, it needs to be disassembled, cleaned and reassembled, which needs a lot of technical work. In order to save cost, most factories give up this process without testing. In this way, no matter how high the accuracy of the hydraulic valve, there will be leakage, some hydraulic valves can not even be assembled, these phenomena are common in China.   Elaine saw our company's website on the Internet and sent an inquiry email. Three days later, accompanied by a Chinese, she found our company. After listening to her intention, we directly took her to the workshop to understand all the supporting production equipment and the whole process. Facing the current production scale, workflow, quality inspection and packaging, Elaine regretted choosing the wrong supplier. She asked if we could help with the delivery of 1500 hydraulic valves and asked us to deliver them within 60 days. I felt Elaine's anxiety, so through the consultation of the production department, we agreed. After 45 days of hard work, we successfully delivered the goods 15 days earlier than expected. After the previous lesson, Elaine paid great attention to the inspection. Half of the quantity was randomly conducted for pressure test before delivery, and the result was that there was no oil leakage, then she was relieved to ship the goods.   Each hydraulic component of AAK has been tested by a pressure test bench with complete parameters, and a professional testing master with 7 years' experience is also equipped. Each product is tested at least three times. The quality of the product is strictly controlled according to the specified parameters to ensure sensitivity and zero leakage. AAK quality control is more QC than customer QC.   Half a year later, we received the first repeat order from the Russian customer Elaine. During the same period, new and old orders were continuously signed. Up to now, the volume can reach 1.5 million US dollars per year on average. Since cooperating with us, Elaine seldom cares about product quality. She has been promoted to the manager of purchasing department.   AAK hydraulic valve can guarantee both quality and quantity, what still else do you worry about? https://aakindustry.com/article/with-zero-leakage-aak-hydraulic-valve-the-russian-buyer-elaine-is-no-longer-concerned-about-quality-and-promoted-i00020i1.html
Price: Inquire
600pcs piece (Min. Order)

Frequently Asked Questions - FAQ's


You can send your inquiry to us about the products. Our sales representative will contact you within 24 hours to assist you regarding your inquiry.

You can expect a reply from AAK INDUSTRY LTD. within less than 24h.

We offer an implied warranty that assures all our products and services function in the manner designed to.

We will begin manufacturing when we receive the agreed upon advance payment. The package will be shipped out after we get your full payment.
Throughout the packing process, preventive measures will be taken so that the goods are in an excellent condition while in transit.
sidebar widget
* I am a Buyer / Seller
* By joining ExportHub, I agree to Terms, Privacy Policy, IPR/DMCA Policy and Marketing Policy of ExportHub
B2B Services
virtual expo
Virtual Expo

We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.