Stainless steel gear pump

Stainless steel gear pump belongs to the positive displacement gear conveying pump. The pump body, pump cover, gears and other components that come into contact with the medium are made of 304 or 316 stainless steel to resist medium corrosion and avoid heavy metal pollution of the materials. The products are divided into room temperature standard type and jacket insulation type, supporting the selection of variable frequency motors and motors. They are used for the transportation of grain, oil and food, chemical, daily chemical raw materials, pharmaceutical accessories, and light oil materials, and can meet the needs of continuous cycle feeding on production lines and intermittent transfer of storage tanks.

The entire unit consists of a stainless steel pump body, front and rear pump covers, hardened stainless steel master and slave gears, transmission shaft, thrust plate, shaft end sealing components, and a shared base to form a conveying unit. The gears are precision ground and processed, with uniform meshing and stable volumetric efficiency; The pump chamber is equipped with an axial force balance channel to counteract the unidirectional axial thrust generated by high-pressure conditions. The thrust plate is worn on one side, resulting in low vibration and stable noise during long-term continuous operation. For low-temperature and easily solidified viscous materials, insulation models can be selected. The pump body is equipped with insulation layers, and steam or heat transfer oil is introduced for heating to prevent the medium from cooling and clumping. The internal moving parts rely on the self lubrication of the conveying medium, without the need for additional independent lubrication pipelines, simplifying the on-site pipeline layout.

The motor drives the gears to rotate synchronously through an elastic coupling, and the volume of the cavity on the side where the gears disengage expands to form negative pressure. The medium is sucked in and filled into the tooth groove; The gear carries the medium to rotate into the oil pressure chamber, and the tooth surfaces mesh with each other to squeeze the medium, forming a stable pressure and conveying it outward. The suction, pressurization, and discharge cycles run continuously. The flow rate is directly proportional to the speed, and when paired with a frequency converter, the conveying volume can be flexibly adjusted, resulting in a stable output pressure.

Most models have built-in reflux valves to provide emergency overload protection. When the pipeline is blocked or the valve is closed, causing pressure buildup, the medium flows back to release pressure, protecting the pump body and rear pipeline fittings. Valves are only suitable for temporary protection in case of sudden failures and cannot be used as voltage regulators for a long time. It is recommended to connect an independent pressure regulating pipeline for working conditions with constant pressure requirements. The inner wall of the pump body is smooth, and materials are not easy to adhere and accumulate. It is easy to rinse and clean after the operation is completed.

The sealing form can be selected with packing seal or hard alloy mechanical seal as needed. Select sealing components for transporting edible oil and syrup; Transporting weak acid and alkali, solvent replaceable fluororubber seals. The whole machine adopts a modular structure, and maintenance does not require dismantling the whole machine. Removing the outer pump cover can replace the sealing parts, shortening the downtime of the production line. Conventional models are suitable for medium temperatures ≤ 120 ℃, while insulation models can be adapted for conveying high-temperature viscous materials.

On the media adaptation level, the stainless steel gear pump is suitable for conveying liquid media without hard and sharp particles and with fluidity. The medium kinematic viscosity is 5~1500mm2/s, and it can transport edible oil, syrup, glycerin, essence, lubricating oil, and slightly corrosive chemical auxiliary materials. 304 stainless steel models are commonly used for transporting grain, oil, and ordinary daily chemical products; The 316 stainless steel model is suitable for corrosive chemical solutions and raw materials. The equipment is not suitable for conveying media containing strong oxidizing acids and large amounts of hard solid particles.

In terms of installation matching, the horizontal base is reserved with standard anchor installation holes, and two types of interfaces, flange and thread, are available for easy connection of soft and hard pipelines. Correct coaxiality when assembling elastic couplings to reduce vibration wear. It is recommended to install a pre filter on the suction pipeline to prevent impurities from scratching the gear meshing surface; The pipeline is equipped with sealing gaskets, causing unstable suction due to air intake. Inject the medium into the pump chamber before starting, and prohibit long-term idling to avoid seal failure due to dry abrasion.

At the level of daily maintenance operations, the pump body adopts modular assembly, and the gears, thrust plates, and seals can be disassembled separately. Simple tools can be used to complete maintenance. After conveying viscous and easily dry materials, rinse the pump chamber with clean water or a matching solvent circulation to prevent the material from drying and sticking to the gears. Regularly inspect for seal leakage and motor temperature rise, and promptly clean up filter debris. Long term shutdown to drain residual materials from the pump and ensure internal protection.

During long-term use, we adhere to pre filtration, standardized start stop, and regular cleaning and maintenance, resulting in a lower overall failure rate. The equipment has a compact structure, occupies a small area, and is made of stainless steel material that combines hygiene and durability. The comprehensive operation and maintenance cost is moderate.

Overall, stainless steel gear pumps rely on stainless steel overcurrent components and achieve stable pressure conveying through precision gear meshing. They can be equipped with jacket insulation and configuration, and are suitable for conveying food, grain and oil, chemical, and daily chemical media. With a simple structure and easy cleaning and maintenance, they are the mainstream volumetric conveying equipment for material transportation in small and medium-sized production lines.