Iron Filings In Hydraulic Valve Block

Hydraulic Pay Off Stand

We are supplier and exporter of Hydraulic Oil.

Our product is a high quality product made from imported oils and additives of best quality. It has a very good life and will give the best performance under the most critical conditions. It is available in 210 ltrs. Hdpe drum/ 26 ltrs. And 50 ltrs.

Multi-brand Hydraulic Oils ISO VG 15, 32, 46, 68 and 100. Available in Drums, pails, IBCc, Bulk.

AAK hydraulic valve block adopts multi edge particle cutting with diamond reamer, the accuracy can reach 0.002mm, and the surface roughness can reach Ra 0.2um, the precision is twice that of other hydraulic valve manufacturers, and there is no iron filings. Because the price of AAK hydraulic valve block is a little higher than that of peers, LIEBHERR excluded AAK from the supplier list. However, 3 months later, LIEBHERR still placed an order for the hydraulic valve block with AAK.

This morning, I received an order for hydraulic valve block from Herta from LIEBHERR company in Germany, which was a little unexpected. Because this is the hydraulic valve block that AAK sent sample for 3 months ago. Since the sample was sent, there was no news about the sample. After several follow up emails, the reply was "unqualified". I asked about the reason why the hydraulic valve block was unqualified, but didn't get reply. Now I can't understand why the order comes to us 3 months later.

Herta is mainly responsible for the procurement of hydraulic accessories of LIEBHERR. In the first half of this year, his company needed to purchase a batch of high-precision hydraulic valve blocks for hydraulic excavators. At that time, he selected 5 hydraulic valve factories to send samples to test the quality and conduct assembly tests. 3 months later, after comprehensive comparison, their technical team found that the test data of AAK hydraulic valve block was the best among the 5 hydraulic valve manufacturers.

I asked Herta curiously why the reply he gave us 3 months ago was "unqualified". He replied that your quotation was unqualified and more expensive than the other 4 hydraulic valve manufacturers, so we judged AAK to be unqualified. After 3 months of testing, the technical team believes that AAK's hydraulic valve block has the highest precision, the strongest durability and the simplest follow-up maintenance. Although the price of AAK is a little higher than that of other suppliers, according to the comparison of various parameters, the hydraulic valve block of AAK can enable LIEBHERR to reduce the cost of subsequent maintenance, so the technical department designated AAK to supply this hydraulic valve block.

Herta asked us why some parameters of AAK hydraulic valve block are twice better than those of peers? The high precision of AAK hydraulic valve block mainly comes from the diamond reamer used in AAK machining center, which is a multi edge particle cutting. In the reaming process, the chips are hidden between the diamond particles and thrown out via coolant flushing and high-speed rotation, so that the chip removal in the first step is complete.

Patrick, an old customer in the Netherlands, used to buy our hydraulic cartridge valves. In the first half of the year, he purchased a batch of hydraulic valve blocks from another hydraulic valve manufacturer, but he had received a strange complaint from users in recent weeks. The hydraulic oil deteriorated suddenly. After stopping the machine to check the hydraulic oil, it was found that there were small iron filings inside the oil. After disassembling the whole hydraulic valve, it was found that the valve spool also showed signs of wear. The customer judged that there were iron filings in this batch of hydraulic valve blocks.

Patrick discussed with the hydraulic valve block manufacturer about how to deal with this quality complaint. The manufacturer replied that it was the problem of hydraulic oil, not the hydraulic valve block. So this problem was stuck here. Patrick emailed me and asked if I knew this hydraulic valve block manufacturer and whether I could mediate and solve the problem.

When I received the drawings of the hydraulic valve block purchased by Patrick this time, I felt that the iron filings probably came from the hydraulic valve block, because the intersecting processing channels of this hydraulic valve block were complex. With Patrick's appeal, I went to the hydraulic valve block factory. The overall feeling of the factory was still good, but the cleaning process before hydraulic valve block packaging did not accord with the process and details in my mind.

When I came back, I emailed Patrick. The manufacturer should understand that the problem of iron filings lay with them. However, according to the current iron filings removal process in this factory, even if replenishment, it was difficult to completely avoid iron filings. So he didn't want to reproduce and couldn't solve the problem, he had to perfunctory your demands.

Patrick didn't reply to my email for 2 days. When I asked him what else he needed me to do in this matter, he said that he had a big headache these 2 days. The owner asked him to find a new hydraulic valve block manufacturer to replenish part of the hydraulic valve blocks to take care of the customer's dissatisfaction with quality. I reminded him that there were few hydraulic valve manufacturers that could do this type of hydraulic valves with many slender holes. AAK HYDRAULIC VALVE solved a similar problem of iron filings of hydraulic valve block last month, and I sent him the pictures of hydraulic valve block for reference.

The next day, Patrick asked us how long it would take to produce 200 hydraulic valve blocks, which was the minimum replenishment quantity required by the customer. When the replenishment order was confirmed, Patrick was relieved.

How does AAK hydraulic valve remove iron filings from hydraulic valve block Firstly, the hydraulic valve block is boiled with high-temperature alkaline water to make the iron filings of the hydraulic valve block lose magnetism, and then

Cast Iron Gate Valve

Pressure Rating : Class-125

Material : Cast Iron

Description : Bolted Bonnet, Inside Screw, Rising Stem

Trim : All Iron / Gun Metal

Ends : Flanged

Operator : Hand wheel

Item Code : CI000004

Size : 50mm

Notes :

Available Valve Size : 40mm to 300mm

Cast Iron Butterfly Valve

BS 5155

Pressure Rating : Class-125

Material : Cast Iron

Description : Wafer Type, With Lugs, Centric Disc

Disc : Ductile Iron / SS 304 / SS 316

Seat : Moulded EPDM, BUNA-N, Neoprene, Viton

Ends : Lugged

Operator : Lever, Gear, Pneumatic, Electric

Item Code : CI000029

Size : 40mm

Notes :

Available Valve Size : 40mm to 400mm

Cast Iron Butterfly Valve

IS 13095, BS 5155

Pressure Rating : PN-1.6

Material : Cast Iron / Ductile Iron

Description : Wafer Type

Disc : Ductile Iron / SS 304 / SS 316

Seat : Moulded EPDM, BUNA-N, Neoprene, Viton

Ends : Wafer Type

Operator : Lever, Gear, Pneumatic, Electric

Item Code : CI000091

Size : 40mm

Notes :

Available Valve Size
PN-16 40mm to 400mm
PN-25 40mm to 400mm

Cast Iron Reflux Valve

IS 5312

Pressure Rating : PN-1.6

Material : Cast Iron / Ductile Iron

Description : Bolted Cover

Trim : Gun Metal

Ends : Flanged

Specials : Dash pot arrangement, By pass arrangement

Item Code : CI000021

Size : 50mm

Notes :

Available Valve Size :
PN-1.6 50mm to 500mm
PN-20 50mm to 300mm

Ductile Iron Balancing Valve

BS 7350

Pressure Rating : PN-16

Material : Ductile Iron

Description : Double Regulating Bolted Bonnet with Pressure Test Cock

Ends : Flanged

Operator : Hand wheel

Item Code : DI000103

Size : 50mm

Notes :

Available Valve Size : 50mm to 300mm