Stainless steel gear pump

Stainless steel gear pump belongs to the positive displacement gear conveying pump. The pump body, gears, pump cover and other overcurrent components are made of 304 or 316 stainless steel to resist medium corrosion and mild corrosion, and will not cause heavy metal pollution to the conveyed materials. It is divided into ordinary room temperature type and jacket insulation type, which can be matched with motors and variable frequency drives. It is applied in the transportation of food, grain and oil, daily chemical raw materials, chemical, pharmaceutical auxiliary materials, and light oil materials. It can be used for continuous cyclic feeding or intermittent material transfer between storage tanks.

The entire unit consists of a stainless steel pump body, front and rear pump covers, heat-treated stainless steel master and slave gears, quenched and tempered transmission shaft, thrust plate, shaft end sealing components, and base to form the conveying unit. Gears undergo precision machining and surface hardening treatment, meshing, and stable volumetric efficiency; An axial force balance flow channel is installed inside the cavity to counteract the unidirectional thrust generated during operation, reduce the wear of the thrust plate, and ensure smooth vibration during long-term continuous operation. Insulation style can be used for conveying easily solidified viscous materials. The pump body integrates an insulation layer and is supplied with heat transfer oil or steam 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 systems, simplifying the on-site pipeline layout.

After the equipment is powered, the motor drives the gears to rotate synchronously through an elastic coupling. The expansion of the cavity volume on one side of the gear disengagement creates negative pressure, and the medium is filled into the tooth groove through the oil inlet channel; As the gears rotate, the medium is carried and transported to the oil pressure chamber, and the gears re mesh to compress the volume. The medium forms a stable pressure and is output outward, and the suction and transportation process continues to circulate. Smooth flow output, coupled with a variable frequency motor to adjust the conveying flow, with low operating noise.

Some models are equipped with built-in reflux valves to provide overload protection. In case of accidental blockage and pressure buildup in the pipeline, the medium will reflux and release pressure, protecting the pump body and pipeline accessories. Models without built-in valves can be equipped with external overflow valves for pressure protection. The inner wall of the pump body is smooth and not easily adhered to materials, making it easy to clean after transportation and meeting the basic hygiene requirements of the food industry.

The sealing matching can choose packing seal or hard alloy mechanical seal according to the working conditions. Transport edible oil and clean water using ordinary seals; Fluorine rubber sealing components for weak acid-base and solvent medium exchange. The sealing accessories are easy to disassemble and assemble, and there is no need to disassemble the entire machine for maintenance. Simply remove the outer pump cover to complete the replacement, shortening the downtime of the production line. Conventional models are suitable for medium temperatures ≤ 120 ℃, while insulation models can be adapted for conveying viscous materials at different temperatures.

On the media adaptation level, the stainless steel gear pump is suitable for conveying liquid media without hard sharp particles and with lubricity. The medium kinematic viscosity range is 5 to 1500mm2/s. It is suitable for cooking oil, syrup, glycerin, lubricating oil, low corrosive chemical raw materials, essence additives and other materials. 304 stainless steel models are commonly used for transporting grain, oil, and ordinary daily chemical raw materials; The 316 stainless steel model is suitable for transporting mildly corrosive chemicals and auxiliary materials. The equipment is not suitable for conveying scenarios involving strong oxidizing acids and media containing a large amount of hard particles.

In terms of installation and matching, the horizontal base of the whole machine is reserved with standard anchor holes, and flanges or threaded interfaces can flexibly connect hoses and hard pipes. Install an elastic coupling on the power end, calibrate the coaxiality during installation, and reduce vibration wear. It is recommended to install a pre filter on the suction pipeline to intercept impurities and avoid gear scratches; The pipeline joints are equipped with sealing gaskets to prevent unstable suction caused by air intake. Before starting, there is a medium in the pump chamber. It is strictly prohibited to idle for a long time, which may cause dry wear and damage to the seal.

At the level of daily maintenance operations, the pump body adopts a modular split structure, and the stainless steel gears, thrust plates, and seals can be disassembled separately. Simple tools can be used to complete maintenance. After conveying viscous and easily drying materials, rinse the pump chamber with clean water or clean solvent circulation to avoid material drying and sticking to gears. Regularly check the seal for leakage and the motor temperature rise for normal operation on a daily basis; Keep the inlet filter clean to prevent blockage and insufficient suction. Long term shutdown to empty the residual medium in the pump and take internal protection measures.

During long-term use, adhering to pre filtration, standardized start stop, and regular cleaning and maintenance reduces the probability of complete machine failure. Stainless steel material balances hygiene characteristics, has a compact structure and occupies less space, and has low comprehensive operation and maintenance costs, making it suitable for normalized material transportation in small and medium-sized production lines.

Overall, the stainless steel gear pump adopts stainless steel overcurrent components, with stable gear meshing and conveying pressure. It can also be equipped with a jacket insulation structure, which is suitable for the transportation needs of food, grain and oil, chemical, and daily chemical media. The compact structure and easy cleaning and maintenance make it a commonly used volumetric conveying equipment for material transfer in small and medium-sized production lines.