Stainless steel insulated gear pump

Stainless steel insulated gear pump is a volumetric conveying equipment designed for viscous media that are prone to solidification and crystallization. The pump body and front and rear pump covers are equipped with insulation layers, which can be supplied with steam and heat transfer oil for circulation heating, continuously maintaining the temperature of the medium and preventing material cooling, agglomeration, and adhesion to the cavity. The pump head contact medium components are made of 304 or 316 stainless steel material, which is rust proof and will not cause secondary pollution to the material. It can be used in conjunction with variable frequency motors and motors, and is applied in grain and oil processing, chemical industry, pharmaceutical preparations, resin, coating additives transportation. It supports continuous feeding on production lines and intermittent transfer operations in storage tanks.

The entire unit consists of a jacketed stainless steel pump body, insulated pump cover, 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 undergo precision grinding and machining, resulting in uniform meshing clearance and stable volumetric efficiency; There is an axial force balance flow channel inside the pump chamber to counteract the axial thrust generated by high-pressure conditions, reduce unilateral wear of the thrust plate, and achieve low vibration and stable noise during long-term continuous operation. The insulation layer fully covers the overcurrent chamber, providing uniform heating without dead corners. During shutdown, the material flow can also be maintained, and the viscous medium solidifies and blocks the gears. 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 fills the tooth groove; The gear carries the medium to the oil pressure area, 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 and speed are linearly related, and when combined with a frequency converter, it can flexibly adjust the conveying flow rate and has basic self-priming ability.

Most models are equipped with built-in reflux valves as emergency overload protection. When the outlet pipeline is blocked or the valve is closed, causing pressure buildup, the medium flows back and releases pressure inside the pump, protecting the pump body, valve, and rear pipeline. Valves are only suitable for temporary protection in case of sudden failures and cannot serve as long-term stabilizing devices. If there is a need for constant pressure transmission, an independent overflow pipeline can be connected externally. The inner wall of the pump body is smooth, and the material is not easy to adhere and accumulate. It is easy to circulate and rinse after the conveying operation is completed.

The sealing structure can be equipped with packing seals and hard alloy mechanical seals as needed. Select sealing components for transporting edible oil and syrup; Transporting weak acid and alkali, solvent can upgrade fluororubber sealing accessories. The whole machine adopts a modular split structure, and maintenance does not require disassembling the whole machine. Removing the outer pump cover can replace the sealing components, shortening the downtime of the production line. The applicable medium temperature can reach 180 ℃, and temperature stability control is achieved through insulation system.

On the media adaptation level, the stainless steel thermal insulation gear pump is suitable for conveying liquid media without hard sharp particles and with fluidity. The medium kinematic viscosity range is 5~1500mm2/s. It can transport edible oil, syrup, resin, essence, lubricating oil, chemicals and slightly corrosive chemical auxiliary materials. The 304 stainless steel model is suitable for transporting grain, oil, and ordinary daily chemical raw materials; 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 and matching, the horizontal base of the whole machine is reserved with standard foot installation holes, and two types of inlet and outlet interfaces, flange and thread, are available for easy docking of soft and hard pipelines. Correct coaxiality when assembling elastic couplings to reduce component wear caused by vibration. It is recommended to install a pre filter on the suction pipeline to prevent impurities from scratching the gear meshing surface; The pipeline joints are equipped with sealing gaskets to prevent unstable suction caused by air intake. Inject the medium into the pump chamber before starting, and it is strictly prohibited to idle for a long time to avoid damage to the seal due to dry abrasion; When transporting materials that are prone to solidification, preheat the pump body with a heat source before starting up.

At the level of daily maintenance operations, the pump body adopts modular assembly, and the gears, thrust plates, and seals can be disassembled separately. Ordinary and 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 materials from drying and sticking to the gears. Regularly inspect the sealing leakage and motor operating temperature rise, and promptly clean the filter debris. Long term shutdown to empty the residual medium inside the pump chamber, release the pressure of the insulation jacket and drain the heat exchange medium, and do a good job of internal rust prevention and 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 and small footprint, with stainless steel material that balances hygiene performance and capability. The insulation layer solves the problem of medium solidification, and the comprehensive operation and maintenance cost is moderate.

Overall, the stainless steel insulated gear pump is equipped with a fully covered surrounding insulation jacket, and the overcurrent component is made of 304/316 stainless steel. It relies on precision gear meshing to achieve stable pressure transmission. It can be optionally configured with frequency conversion and is suitable for conveying viscous media that are prone to solidification in grain, oil, chemical, and pharmaceutical industries. It operates stably and is easy to clean and maintain.