Corrosion resistant centrifugal pump

Friend, if you have ever used a polypropylene centrifugal pump, you may have encountered a situation where my equipment is clearly in normal use and the water temperature is not too high. Suddenly, the machine seal burns out, the impeller burns out, and the pump body or cover also melts. In a short while, a polypropylene centrifugal pump is finished, costing one thousand or even several thousand yuan.

In excluding the situation of dry grinding of the machine seal, a large part of the reason may be that the liquid in the pump body vaporizes at low temperature under certain conditions (or the gas content in the pumped liquid is high), blocking the cooling surface of the machine seal, causing local dry grinding of the machine seal under normal use. In just a few seconds, the machine seal will quickly heat up to 300-400 degrees or even higher at a high speed of 2900 revolutions per minute.

If you have encountered such a problem during use, youS SeriesCorrosion resistant centrifugal pumpThe polypropylene centrifugal pumps S40, S50, S80, and S100 series currently produced by our company all use our self-developed machine seals. After several customer trials, the cooling effect is better and the service life is longer, which can greatly avoid situations where the machine seal is not cooled properly and the equipment is damaged. (The selling price remains unchanged)

S SeriesPrinciple: 1. Increase the contact area between the machine seal and the liquid by 3-5 times. 2. The cooling part of the machine seal extends into the center of the pump body, rather than in the corner of the remote pump body. 3. Localized sharp corners disrupt the formation of bubbles.

Overview
The components of the Yili brand S series plastic centrifugal pump are made of reinforced polypropylene and polyvinylidene fluoride through one-time injection molding. Due to its superior anti-corrosion performance, simple structure, and easy maintenance, it has been widely used in industries with corrosive environments such as chemical, pharmaceutical, and agricultural pharmaceuticals. Its high efficiency and low price make it an ideal product to replace stainless steel pumps, PTFE pumps, and other non-metallic pumps

Its vulnerable parts are mainly machine seals, and in addition to normal wear and tear, local overheating and accidental damage can also occur frequently. Our company has organized research forces to tackle customer feedback. In 2012, our company's newly developed mechanical seal won national recognition. After actual use by customers, its service life is much longer than that of ordinary WB2 mechanical seals. Protecting customer investments. We insist on making the equipment with the lowest usage cost.

Enhanced non-polar polypropylene, non-toxic, resistant to general acids, bases, and salts, with a working temperature range of -12 ℃ -80 ℃

Polyvinylidene fluoride has good airtightness, no toxicity, non polarity, good oxidation resistance, good mechanical properties, and resistance to strong oxidants, halogens, and aromatic solvents. Its working temperature ranges from -40 ℃ to 135 ℃

choice

Main material: Reinforced polypropylene or polyvinylidene fluoride

Mechanical seal: Mechanical seal, double-sided silicon carbide. If used under alkaline conditions, please let us know and we will select a pressureless seal (structure) for you

Motor: Ordinary motor or explosion-proof motor.

What you should know is different

1. The smaller the pulsation of the impeller, the higher the performance of the pump and the longer its service life. We have cancelled the design of the pump shaft sleeve and directly connected the impeller to the motor, reducing the impeller's jumping by twice. It also avoids the difficulty of repair and assembly caused by rust on the shaft sleeve and motor shaft when the pump is used in a corrosive environment. Missing a component makes maintenance more convenient.

2. Except for S32 pump, all other models of centrifugal pumps currently use my driver seal, which has a service life of 1 to 3 times that of ordinary seals; And it is unlikely that the centrifugal pump will experience sudden temperature rise and damage to the equipment during normal use.

3. The S32 pump adopts a standard pump structure design, which is different from simplified products on the market.

4. The S80 pump adopts a standard shaft with threaded motor (the pump shaft sleeve is an optional part, making it convenient for customers to choose a standard motor); The pump body adopts a plum blossom edge design, which moves the embedded parts outward to increase the sealing surface and minimize leakage, corrosion of the embedded parts, and damage to the pump body caused by aging of the sealing gasket, resulting in losses to the user.

5. S100 pump, our company redesigned the connection frame structure in 2013, using a short shaft with threaded motor, eliminating the pump shaft sleeve design, and integrating RPP injection molding into the connection frame, reducing the length by one-third and doubling the thickness compared to the original. The impeller jumping is reduced by half.

6. To ensure product quality, we purchased a 7880 5000g injection molding machine worth 1 million yuan, and all injection molded parts were processed by ourselves. Increase compactness, reduce foaming, and improve the quality of injection molded parts. (Very few pump manufacturers purchase this type of extra large injection molding machine themselves)

Overview

The components of the Yili brand S series plastic centrifugal pump are made of reinforced polypropylene and polyvinylidene fluoride through one-time injection molding. Due to its superior anti-corrosion performance, simple structure, and easy maintenance, it has been widely used in industries with corrosive environments such as chemical, pharmaceutical, and agrochemical industries. Its high efficiency and low price make it an ideal product to replace stainless steel pumps, PTFE pumps, and other non-metallic pumps.

Enhanced non-polar polypropylene, non-toxic, resistant to general acids, bases, and salts, with a working temperature range of -12 ℃ -80 ℃

Polyvinylidene fluoride has good airtightness, no toxicity, non polarity, good oxidation resistance, good mechanical properties, and resistance to strong oxidants, halogens, and aromatic solvents. Its working temperature ranges from -40 ℃ to 135 ℃

The vulnerable parts of centrifugal pumps are mainly mechanical seals. In addition to normal wear and tear, accidental damage caused by local overheating often occurs. Our company has organized scientific research efforts to address customer feedback. In 2012, our company developed a new type of mechanical seal. After actual use by customers, its service life is much longer than that of ordinary WB2 mechanical seals. Protecting customer investments. We insist on making equipment with lower usage costs. ）

Whether the water pump is good or not, the mechanical seal is very important

Model Description

product image

Decomposition diagram of centrifugal pump

Specifications and Scope of Application

Main material: Reinforced polypropylene or polyvinylidene fluoride

Mechanical seal: Mechanical seal, double-sided silicon carbide.If used under alkaline conditions, please let us know and we will select a pressureless machine for you

Motor: Ordinary motor or explosion-proof motor.

Model and Technical Parameters

Product Highlights

1、 The cantilever is short. The longer the cantilever, the greater the impeller runout; The lower the pump efficiency, the shorter the service life of the mechanical seal.

2、 Completely abandon metal brackets and switch to RPP material, which will never require a second purchase unless it is damaged by human factors.

3、 Machine seals have a heat exchange area 3-6 times larger than ordinary machine seals, making them more durable.

4、 Machine seal, * bubble breaking device, prevents bubbles from accumulating on the surface of the machine seal, causing abnormal damage to the pump.

Long winded: Polypropylene chemical anti-corrosion centrifugal pumps are widely used in the fields of chemical, agrochemical, pharmaceutical and other anti-corrosion industries due to their superior anti-corrosion performance and low price. However, you must have encountered the following situation: my equipment is clearly in normal use, and the water temperature is not too high. Suddenly, the machine seal is burned out, the impeller is burned out, and the pump body or cover is also melted. In a short while, a polypropylene centrifugal pump is finished, costing a thousand or even thousands of yuan. In this situation, you may blame the employees for not taking good care of the equipment, but it is also very likely that they have been wrongly accused.

In excluding the case of dry grinding of the machine seal, a large part of the reason for this situation may be that the liquid in the pump body vaporizes under certain conditions (there will be local vacuum in the pump body) (or the gas content in the pumped liquid is high), blocking the cooling surface of the machine seal, causing local dry grinding of the machine seal under normal use. In just a few seconds, the machine seal will quickly heat up to 300-400 degrees or even higher at a high speed of 2900 revolutions per minute.

If you have encountered such problems during use, you can use Yili brand polypropylene centrifugal pumps. Our company's current production of polypropylene centrifugal pumps S40, S50, S80, and S100 series all use our self-developed machine seals. After trial by multiple customers, the cooling effect is better and the service life is longer, which can greatly avoid situations where the machine seal cooling is not in place and the equipment is damaged. (The selling price remains unchanged)

Sealing principle: 1. The area of contact between the seal and the liquid increases by 3-5 times. 2. The cooling part of the machine seal extends into the center of the pump body, rather than in the corner of the remote pump body. 3. Localized sharp corners disrupt the formation of bubbles.

Here is one of our clients who, due to the transition period between new and old machine seals at the time, partially used old machine seals on their equipment, resulting in the aforementioned issue. After a free replacement of the machine seal, the problem was resolved.

ZF series self-priming pump