Note:
[1] For DFMSD medium - and low - pressure pumps and high - temperature pumps, the suction port pressure + maximum pump pressure ≤ 7 MPa.
For DFMSD medium - high - pressure pumps, abrasion - and corrosion - resistant pumps, and seawater pumps, the suction port pressure + maximum pump pressure ≤ 15 MPa.
[2] For DFMSD medium - and low - pressure pumps, the temperature ≤ 105°C; when the medium temperature ≥ 80°C, external cooling water must be connected for cooling.
For DFMSD high - temperature pumps, the temperature ≤ 160°C. External cooling water must be connected for cooling, and mechanical seal cooling flushing should be adopted.

Product Structural Features

• Impeller and Shaft Balance: Balanced according to ISO 1940 - 1 G2.5 grade, achieving smooth rotation with no vibration.
• Heavy - Duty Bearings: Can be equipped with self - aligning radial spherical bearings and axial thrust bearings. The heavy - duty radial spherical bearings can compensate for radial movement, and the thrust bearings can withstand axial force.
• Bearing Isolator: Prevents external contaminants from entering, significantly reducing the risk of bearing damage.
• Flange Connection: Meets GB/T 9124.1 standard for PN series flanges for suction and discharge. Other standard flanges can also be used.
• Single - Stage Cover Bolt Structure: The bolt layout is designed to minimize bending stress. High - strength bolts with fine - pitch threads are used. The pump cover and end cover can be easily removed.
• Equal - Load Design of Diaphragm Gasket: Balances radial force, reduces vibration, and lowers pump noise.
• Transition Flow Passage: Optimizes flow, minimizing friction loss and maximizing efficiency.
• Split - Middle Throttle Bush: Can withstand large axial and radial forces, simplifying rotor assembly and disassembly.
• Impeller Back - Pressure Device: Ensures balanced axial force. Different impeller vane numbers can balance radial force, reducing axial movement.
• Integrated Pressure - Equalizing Pipe: The balanced pressure - equalizing pipe makes the packing seal only bear inlet pressure.
• Sealing Gland: Meets GB/T 14624.9 standard for gland studs and nuts, ensuring reliable connection and easy disassembly and assembly.

. Located in Tianjin, China, Tianjin Shiny-Metals Technologyco., Ltd. is a professional company that specializes in the research and development, design, production, sales, trade, and service of pumps. Our products are exported to more than 40 countries and regions, continuously building our global brand reputation. We offer a wide range of pumps, including centrifugal pumps, axial flow pumps, jet pumps, submersible pumps, deep-well submersible pumps, and swimming pool pumps, with over 500 specifications available. Our company has obtained the ISO 9001 certification from the International Organization for Standardization (CQC). In addition, our civilian motors have undergone product evaluation for CCC China mandatory certification. We have also received certifications such as CE, EMC, GS, RoHS, EAC, SASO, and ST. Our company is dedicated to meeting customer needs with high-quality products, reasonable prices, and exceptional pre-sales, in-sales, and after-sales services. We adhere to the management principles of "quality first, customer first, and reputation-based" and are committed to providing global customers with the best solutions for water pumps and water treatment systems, improving their quality of life. Our goal is to make the world a better place through water, and we strive to make water even better.