What are the differences between Qihao pumps and Perrot pumps for slurry pumps?

Frua uses a hose and a ball check valve； What’s great about it is the diaphragm, a conical one-way valve.

Are the differences in the propellant control systems also significant?

Firouz has many more advantages than Beech! ! In terms of control/operation/performance, etc

I have worked with both types of pumps and used them for a long time – the Qihao pump for 12 years and the Ferrova pump for 3 years. To share my personal opinion, in terms of operation, the Qihao pump is quite complex; it takes a worker a long time to become fully familiar with it, and starting and stopping it is rather troublesome, as well as inconvenient to operate； Our operators at Ferrovia jokingly call it the “idiot pump” – it’s quite simple to operate, and no extensive training or understanding is required; it’s almost as easy as turning on or off a centrifugal pump. Feiruwa has an advantage in this regard; even Qihao Pumps can’t match it. But Feroua also has many shortcomings. For example, the device’s own interlock protection may be insensitive or entirely absent. For example, in the case of overpressure at the pump outlet, there is no way around it with Qihao pumps – the pump will simply stop operating ； The Ferrova does not have any built-in protection mechanism; it opens the safety valve of the drive fluid tank to release oil and thus relieve pressure. However, this approach is not ideal in practice. Sometimes, the safety valve does not activate at all, and even when it does, its diameter is too small and it is located inside the drive fluid tank, which prevents pressure from being relieved. I’ve seen this phenomenon occur in several companies; in such cases, the pumps had to be stopped manually because the pressure inside the pipes was too high (120 kilograms), and no one dared to relieve that pressure. The oil pump system and hose system of Ferrova generate frequent alarms; many of these are false alarms, but there is indeed a higher likelihood of problems compared to Qihao. Although Ferrova is marketed as a double-hose diaphragm pump, in my opinion the lifespan of its two diaphragms is not necessarily as long as that of Qihao’s single diaphragm. During routine maintenance, Ferrova finds it much more difficult to determine when a single cylinder is not functioning properly compared to the Qihao pumps. Each cylinder of a Qihao pump is equipped with a pressure gauge, making it easy to see the status. Ferrova, on the other hand, has to rely on operators to listen, feel, and make judgments. During the routine maintenance of Qihao pumps, exhaust is an essential task, and it’s easy to tell when the exhaust is complete – it’s clear at a glance ； Feurou claims to eliminate exhaust, but in reality it remains too idealistic. The diaphragm of the Qihao pump is controlled by a probe to determine whether it is in place or not; Ferrova does not have such a mechanism. As a result, it’s difficult to know exactly where the diaphragm is located, which can easily lead to damage to the diaphragm. The Qihao pump has a dedicated flushing oil pump for the piston, whereas the Ferrova model does not; in practice, it seems that the oil circuit system of the Ferrova model is prone to clogging, which also causes damage to the equipment. In terms of maintenance, Ferrova has clear advantages: it is easy to disassemble and assemble, making it simple and convenient. Qihao, on the other hand, is far inferior as it is too troublesome. In terms of investment, Feroua should be much cheaper than Bichi. These are just my personal opinions; feel free to criticize them

For high pressure, we use Fillouva, while for low pressure, we use domestic pumps of the Fangqihao brand. After using it for 6 years, I share the same feelings as those upstairs.

The Ferrofluid pump is quite useful; our company uses it and it has always worked well

The main feature of Ferrova is its double-layer hose diaphragm and mechanical compensation system. The main feature of Qihao is its single-layer diaphragm, with a complex structure for the compensation system. I can also recommend the German EMMERICH high-pressure slurry pump, whose main features include a double-layer bowl-shaped diaphragm and a mechanical compensation system