hydraulic equipment, which needed to use hydraulic relief valves. The boss asked that the procurement cost of the hydraulic relief valves should be reduced by 15% on the premise of ensuring the quality. He contacted the original hydraulic relief valve manufacturer, and the manufacturer replied that it was impossible. In desperation, he had to find a new manufacturer of hydraulic relief valves.
Rodriguez has participated in the Shanghai PTC exhibition and collected some hydraulic relief valve manufacturers, which have great advantages in terms of price. The quotation of some hydraulic relief valve manufacturers is only half of that of manufacturers, and the quotation of some hydraulic relief valve manufacturers is 60% cheaper than that of manufacturers. He is a little surprised that there is such a big difference in the quotation of different manufacturers for the same hydraulic relief valve. They began to test the parameters of the hydraulic relief valves from 3 manufacturers, but did not require to send samples, because the price of was 20% - 30% higher than that of other manufacturers.
A month later, the hydraulic relief valve samples from the 3 factories were tested and they all failed to meet the indicators of American manufacturers. The pressure of some hydraulic relief valves could not rise within a few days after the equipment was installed. Rodriguez initially screened the manufacturers of hydraulic relief valves and used the 3 factories with low prices. Maybe it proves that Cheapest is the dearest. He changed his strategy and used the hydraulic relief valve manufacturers with relatively high quotation to test the samples. offers the highest price, but it is still about 30% cheaper than manufacturer. At the same time, promised that the quality could fully match that of manufacturer.
According to the hydraulic relief valve drawings and working condition information provided by Rodriguez, sent the samples of the hydraulic relief valves after 25 days. A month later, Rodriguez sent an email that hydraulic relief valves passed the test, and the parameters were benchmarked with those of the original manufacturer, and even some details and appearance were visually more exquisite than those of the manufacturer.
He would like to know how makes hydraulic relief valves that surpass American manufacturers
has a high-precision CNC machining center imported from and various independent fixtures upgraded and refitted by itself, which eliminates human errors and avoids faults such as stuck valve spool of hydraulic relief valves.
safety relief valve DN 20 valve body bronze valve seat and spring brass operating temperature -200 ------+250
Shandong Senteke Hydraulic Co.,Ltd.We are manufacturer of cartridge valve and hydraulic system.And we can design valves according to your requirements
Material Stainless Steel Automatic Grade Automatic Specialities Investment Casting, Blow-Out-Proof Packaging Type Wooden Box Voltage Range 230 V AC Working Temperature -50 to 150 bar
It is used for relief the pressure from the device. The max. pressure can be 8 KG/cm2, and the pressure acceptance can be adjusted. Size: 1/2, 3/4 Ending: MxF Pressure Release Ending: Hose
244.Z244: Safety Relief Valve with Sealing 245.Z245: Safety Relief Valve with Lever Size: 1/2, 3/4, 1", 11/4, 11/2, 2" Working Pressure Range: 0.3 - 10 KG/cm2 WorkingTemp: -45C - 185C Wokring Fluid: Noncorrosive Gas, Steam, Air, Water
Pressure relief valves Long life diaphragm with range of 0-150 PSIG. Air release, optional gauge port and available in PVC, CPVC, PVDF, Teflon, Polypropylene, stainless, alloy 20 and hastelloy C. & sizes are available from 1/4" to 2' NPT. Our color coded handles indate size, and they are also available for higher pressures and temperatures.
For Hydraulic Pilot-Operated, Balanced Piston Relief Valve equivalent to SUN RPEC, the customer in Turkey placed their annual order with AAK This week, weâ??d like to introduce a hydraulic Pilot-Operated, Balanced Piston Relief Valve equivalent to SUN RPEC. This Pilot-operated, balanced-piston relief cartridges are normally closed pressure regulating valves. In 2023, we received an inquiry from a new customer in Turkey for this model. Per customer, they brought this cartridge relief valve from Europe every year. Due to the fierce competition in the market, they were trying to buy from China. There are many hydraulic cartridge valve manufacturers in China who have this hydraulic pilot-operated, balanced piston relief valve RPEC in stock. Per customer, they chose AAK because of the introduction of his friend who has purchased from AAK several times. Last week, we received feedback from customer that AAK valve shipped last year passed their testing. They will place their annual order in a week or two. AAK hydraulic Pilot-operated, Balanced Piston Relief Valve E-RPEC two advantages: 1. The function and performance is equivalent to that of SUN RPEC 2. Its service life is 2 times that of its domestic peers Technical parameters of AAK E-RPEC Hydraulic Pilot-operated, Balanced Piston Relief Valve: Max. Operating Pressure: 350 bar (5000 psi) Flow: 100 lpm (25 gpm) Internal Leakage: 2 in�³/min.@1000 psi Cavity: T-10A AAK E-RPEC hydraulic Pilot-Operated, Balanced Piston Relief Valve, benchmarking SUN RPEC, its service life is 2 times that of its domestic peers. You are welcome to give it a try. AAK HYDRAULIC CARTRIDGE VALVES (794) 2024-04-29
For 240L flow rate and 450bar pressure resistance, the service life of hydraulic relief valve is more than twice that of the original manufacturer hydraulic equipment company. At the beginning of last year, the hydraulic station they sold to was complained by the customer in less than half a year. The oil temperature in the hydraulic station was abnormal, as high as 80 , and the efficiency of the whole hydraulic transmission was poor. The after sales service found that the hydraulic relief valve was stuck, which affected the load relief and caused the oil to heat up. The original hydraulic relief valve manufacturer believed that the jamming was caused by unclean hydraulic oil. After detecting the hydraulic oil, there was no abnormality. When disassembling the hydraulic relief valve, it was found that the contact surface between the valve spool and the valve hole was worn, which should be caused by the coaxiality deviation between the valve spool and the valve hole of hydraulic relief valve, resulting in the jamming. The original manufacturer agreed to replace it, but half a year later, the old problem happened again, and was criticized. had to find manufacturers with long service life of hydraulic relief valves. He contacted many manufacturers and found that most of them were not able guarantee a service life of over 1 year for the hydraulic relief valves with a maximum flow of 240L and a pressure of 450bar, but only 6 months. Finally, only 3 manufacturers were willing to test samples, including . engineers determined that the material selection was a key step according to the parameter requirements of the hydraulic relief valve. After 2 months, 30 samples of hydraulic relief valve were sent out. Last week, we received the PO of hydraulic relief valves from . He said that although was the latest to deliver the samples, in the service life test, the hydraulic relief valve samples provided by the 3 manufacturers showed that only had no abnormalities after a service life of more than 1 year. For this kind of customized, high demand and non-standard hydraulic relief valve, our 3 advantages are not available in most manufacturers . 1. The durability of hydraulic relief valve mainly depends on the material selection according to the working conditions. For this hydraulic relief valve, selects 20CrNi2MoV high carburized bearing steel pretreatment process, through secondary quenching cryogenic treatment low temperature tempering process, it is cooled to 650 ~ 700 and then discharged after being cooled to 450 ~ 500 The microhardness is 237 247 HV, and its wear resistance and contact fatigue performance are increased by more than 3 times. The heat treatment of this material is difficult to control, and most manufacturers cannot control it.
used imported tools to solve the problem of rough inner hole of hydraulic relief valve. David came back after being cheated elsewhere Half a year ago, , an customer, sent an inquiry to about 500 pilot operated hydraulic relief valves. This hydraulic relief valve is difficult to process the inner hole. Our cost accounting department gave a reasonable price. 3 days later, informed that the price of the hydraulic relief valve was 16% higher than that of other manufacturers and he could only place the order with other hydraulic relief valve manufacturer. As far as I know, there are not many manufacturers who can make this hydraulic relief valve. The price provided by this time should be very cost-effective. As is our old customer, we never quote prices indiscriminately. I always believe that it is also a sign of dishonesty to quote prices indiscriminately. Last month, asked again whether the hydraulic relief valve quoted last year could maintain its original price. I asked him curiously, hasn't this hydraulic relief valve placed an order yet truthfully told us that last time, the pilot operated hydraulic relief valves purchased in another manufacturer were reported by the users that the stability was poor and the valve was often stuck. They decided to get replacements. contacted the original manufacturer of the hydraulic relief valves, but the manufacturer was unwilling to offer replacements. Because there were too many complaints, David did not dare to ask the original manufacturer to re produce, so he emailed . was very cautious this time. He specially sent us 5 samples of hydraulic relief valves from the original manufacturer. After receiving and checking, we found that the inner hole of the hydraulic relief valve has a taper, the processing size is not accurate, and the surface roughness Ra is as high as 1.6m. The root cause of these problems is that the processing tool rotates improperly, which also shows that the original manufacturer is not good at processing this special inner hole. No wonder there are so many complaints. It is wise for to change the factory. was satisfied with our diagnosis of this hydraulic relief valve and asked us to make samples as soon as possible. 1 week later, sent the samples of hydraulic relief valve, and approved our samples at one time. They specially compared hydraulic relief valves with that of the original manufacturer. Their engineers admired the inner hole processing of , which not only has no taper, but also has more than twice the accuracy of the original manufacturer. For the special inner hole of this pilot hydraulic relief valve, adopts CBN cubic boron nitride cutter from to replace the conventional ceramic cutter. Most hydraulic relief valve manufacturers dare not use this cutter, which is not only costly,
