Tools & Hardware

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polypropylene pump is a corrosion-resistant industrial pump primarily made of reinforced polypropylene (FRPP/CFR-PP), with core advantages including resistance to acids and alkalis, no metal contact, and lightweight. It is widely used in scenarios such as chemical processing, electroplating, and water treatment for transporting corrosive liquids. Pump Types: Centrifugal Pump: Such as FP,FPD and FPG,FPL series, featuring a compact structure with same inlet and outlet diameters, suitable for direct pipeline installation. It offers a wide range of flow and head selection. Self-Priming Pump: Such as FPZ series, equipped with an air-liquid separation chamber in the pump chamber. After initial priming, it can automatically draw liquid and continue operation with incoming liquid within 12-15 minutes of interruption, eliminating the need for repeated priming. Magnetic Pump: Utilizes a magnetic coupling for non-contact torque transmission, converting dynamic sealing to static sealing, achieving leak-free operation, making it suitable for conveying flammable, explosive, or valuable media. Diaphragm Pump: Such as the QBY series, driven by compressed air, suitable for high-viscosity liquids or media containing particles, with self-priming capability. Pump advantages Strong corrosion resistance: Capable of conveying corrosive liquids such as hydrochloric acid, sulfuric acid, and alkali solutions, with the medium not contact with metal. Lightweight Material: The reinforced polypropylene offers high mechanical strength, weighing only about 1/4 that of metal pumps, making it easy to install and maintain. Temperature Range: The operating temperature typically ranges from -14°C to 80°C, with some models capable of reaching -30°C to 110°C (reinforced polypropylene). Sealing Performance: Mechanically sealed, with long life and minimal leakage. Some magnetic pump structures can achieve zero leakage. Application Chemical Industry: Transporting corrosive liquids such as acid washing liquid, alkaline liquid, and chemical raw materials. Electroplating Industry: Electroplating wastewater treatment and plating solution circulation. Water Treatment: Environmental Wastes Management, Wastewater Treatment, and Circulating Boosting. Other fields: applications requiring corrosion-resistant conveying in industries such as pharmaceuticals, food, papermaking, and marine ,aquaculture etc.

Minimum Order: 1 bags

LC high viscosity Roots pump is a type of positive displacement pump specifically designed for transporting high viscosity liquids. It belongs to the Roots oil pump series and is commonly used in the petroleum, chemical, and food industries. It solves the problem of ordinary pumps being difficult to transport viscous media such as asphalt and sugar through low-speed and high flow design This pump has a wide range of applications, mainly for transporting liquids with high viscosity and poor fluidity Petroleum and chemical industries: including crude oil, heavy oil, coal tar, asphalt, lubricants, paints, glass adhesives, etc. Food processing: can transport viscous liquids such as soy sauce, yeast, syrup, honey, chocolate sauce, jam, etc. Other industrial liquids: such as toothpaste, fatty acids, light alkaline liquids (soap processing), etc. Special working conditions: Some models (such as LCW type) add insulation layer outside the pump casing, using steam or thermal oil circulation insulation, specifically designed to prevent asphalt and condensate from solidifying during transportation. Features Low speed operation: The speed of belt transmission is usually fixed at around 400 revolutions per minute, while the speed of gear reducer drive is adjustable. Low speed helps reduce wear and adapt to high viscosity media. There are various forms of driving: belt drive and gear reducer drive, and users can choose according to the on-site conditions. Strong self-priming ability: It can be started without the need for oil injection, and the self-priming height can usually reach 5-6 meters, making it convenient for loading and unloading oil tankers and tankers. Can work in both forward and reverse directions: The pump supports forward and reverse rotation, making it flexible to operate and easy to clean and maintain pipelines. Sealing design: The shaft is equipped with skeleton oil resistant seals at both ends, and a return oil device is installed in the middle to prevent air intake or oil leakage. Rotor structure: In the early days, it was mostly a two bladed rotor, and some improved models (such as SLC type) used three or four bladed rotors to increase pump shaft rigidity, reduce medium pulsation and vibration Flow rate:10-100m3/h, Pressure:0.6MPA, 1.5MPA Pump inlet /outlet:25mm-200mm (DN25-DN200) Motor power:2.2KW-37KW Liquid temperature: Up 140 degree Celsius (Normal pumps)

Minimum Order: 1 bags

positive displacement pump A positive displacement pump is a type of positive displacement pump that delivers fluid through periodic changes in the volume of the internal chamber of the pump, with a relatively constant volume of liquid discharged per revolution or each reciprocating motion. Unlike centrifugal pumps, its flow rate mainly depends on the speed, and is less affected by changes in outlet pressure. The core principle of a positive displacement pump is "closed chamber delivery", where the fluid is enclosed in a specific space inside the pump and is "squeezed" from the suction end to the discharge end through mechanical motion. Volume change: When the internal structure of the pump (such as gears, screws, pistons) moves, the suction chamber volume increases to form negative pressure suction fluid, and the discharge chamber volume decreases to squeeze out the fluid. Single-way flow: Isolate the suction and discharge areas through one-way valves or engagement lines to ensure that the fluid does not flow back. Flow characteristics: In theory, the flow rate is proportional to the rotational speed, that is, the faster the rotation, the more fluid is discharged, and the flow rate remains relatively stable when the outlet resistance changes According to the different internal working parts, positive displacement pumps can be divided into various types, commonly used in the industrial, food, and pharmaceutical fields. Gear pump: using the rotation of two meshing gears to transport liquids, with a simple structure, suitable for low or medium viscosity media such as lubricating oil and fuel. Screw pump: Conveys fluid through the spiral cavity between the screw and the liner, with a stable flow rate, suitable for high viscosity liquids such as polymer melts. Piston/plunger pump: uses the reciprocating motion of the plunger in the cylinder to generate high pressure, commonly used for high-pressure cleaning and hydraulic systems. Diaphragm pump: changes the chamber volume through the reciprocating deformation of the diaphragm, suitable for conveying corrosive or particle containing media, with no risk of leakage. Rotary cam pump (rotary pump): Valve free design, conveying medium through a closed chamber formed by the rotor and pump casing, with strong self-priming ability. Pump advantages Positive displacement pumps have significant advantages under specific operating conditions Strong self-priming ability: No need to pump before starting, able to suck in liquid. Wide adaptability: capable of handling various complex media such as high viscosity, particle content, and corrosiveness. Pressure stability: When the outlet resistance increases, it can still maintain a constant flow rate until the mechanical limit. Precaution and pump protection: Overpressure risk: If the outlet valve is closed or the pipeline is blocked, the pump will continue to discharge fluid, causing a sharp increase in pressure, which may damage equipment or cause safety accidents. Safety measures: Pressure relief devices (such as safety valves) or interlocking systems must be installed to automatically release pressure when the pressure exceeds the set value, preventing overpressure. Maintenance requirements: When transporting high viscosity fluids, the speed should be limited to avoid inaccurate flow or cavitation caused by unfilled suction ports.

Minimum Order: 1 bags

Centrifugal pump with self priming device The core principle of converting a conventional centrifugal pump into a self- priming pump is simply: It is to ensure the pump can retain water after shutdown and automatically expel air from the suction pipe upon startup.The key to modification liesThe not in altering the impeller, but in installing two essential systems—the "water storage" and "gas-liquid separation" mechanisms—into the pump body. 1. Maintain priming: For ordinary centrifugal pumps, water must be filled before each start-up as the water in the pump casing and suction pipe will drain out. During modification, install a check valve(non-return valve) at the inlet to allow water to flow in but not out. After shutdown, water can remain in the pump body and suction pipe, eliminating the need for refilling during the next startup 2. Air Removal: Simply retaining water is not enough—there is still air in the suction pipe. Self-priming pumps rely on an air-water separation chamber: the impeller mixes water and air into an air-water mixture and ejects it. When the mixture enters a cavity with suddenly increased volume, the flow velocity drops sharply, causing the air to rise and be discharged through the outlet while the water falls back to continue the cycle. After several repetitions, the air in the suction pipe is completely removed, and water rises The core method for converting a centrifugal pump into a self-priming pump involves installing a foot valve or check valve in the suction pipe, along with improvements to the pump body sealing and priming system Common modification methods Install a foot valve or check valve: Install a foot valve at the bottom of the suction pipe or inlet to prevent water backflow and ensure the suction pipe remains fully filled with water. Install an automatic suction device: Add a water collection pipe at the inlet and an air-water separator at the outlet to achieve automatic air venting. Set up the water suction tank: Install a negative pressure water tank or filling chamber, ensuring sufficient liquid is retained for next startup Key modification steps Improve the shaft seal: Replace the cast iron bushing with a brass bushing and use a mechanical seal kit (static ring, dynamic ring, spring, etc.) to ensure the sealing performance of the rotating shaft. Pump Body Modification: Install a stationary ring sleeve and rubber gasket in the packing chamber, machine threads at the impeller shaft end to match the spring seat, and sequentially install the sealing kit. Pipeline Connection: All components must be tightly sealed, with no air leakage in the suction and drainage pipelines Precautions Initial Water Filling: Before startup, fill the pump body with water, then close it after expelling air through the vent valve. Sealing Inspection: Regularly check the wear condition of the pump body and impeller, and promptly replace worn components. Installation Position: The pump should be installed as close as possible to the liquid source, with the inlet pipe kept as short as possible to minimize flow resistance

Minimum Order: 1 bags

QDN single-phase built-in stainless steel submersible pumps, primarily made of 304 or 316L stainless steel. It has a compact size and excellent rust-resistant and corrosion-resistant properties, commonly used for liquid transportation in households and small-scale industrial fluids transportation /conveying. Features: 1. Power supply type: QDN represents single-phase power (220V). The shaft seal adopts a wear-resistant mechanical seal, suitable for full head operation. The single-phase pump is equipped with an internally installed automatic thermal overload protector. For three-phase power supplies, it is typically marked as QN 2. Structural Form: It is an internal-enclosed submersible pump, with the motor stator winding using high-temperature hot water-resistant wires and the pump body bearings designed for high temperatures, capable of pumping hot water below 100°C Material Selection: The entire component is made of stainless steel casting. 304 material is suitable for media with a pH range of 4 to 10, while 316L material is suitable for strong acid, alkali, or seawater environments with a pH range of 0 to 12. Application: Home Life: Suitable for household vehicle washing, garden irrigation, micro water discharge, bathtub aeration and water supply, and water cycle delivery for garden scenic spots. Industrial field: Widely used for hygienic fluid transportation in industries such as pharmaceuticals, food, and chemicals, as well as laboratory water sampling Special Environments: Suitable for hot spring bathing, residential heating, geothermal water extraction, and fountain engineering. Its corrosion-resistant properties make it ideal for industries such as chemical processing, dyeing, and electroplating Remarks: This pump can not be used for operating flammable or other hazardous liquids, and the submersion depth generally should not exceed 5 meters

Minimum Order: 1 bags