Duwan Environmental Equipment (Jiangsu) Co., Ltd

304 Stainless Steel Flow Thru Price, Diving Flow Thru Stainless Steel, Stainless Steel Diving Flow Thru

Low-speed Turbulator, 304 Stainless Steel Material

Low-Speed Submersible Propulsion Performance Parameters

Duwan Environmental Protection 304 Stainless Steel Submersible Propeller Performance and Structure

1. Stainless Steel Submersible Propeller Structure

（1) Construction of Stainless Steel Low-Speed Flow Inducer

Each flow-through unit should be designed as an integrated, sealed, and submersible model. All components of the flow-through unit, including the motor and gearbox, should be capable of continuous operation underwater. The propeller of the flow-through unit is driven by a submersible motor through a reduction gear. The rotating head should be streamlined and conical in structure, ensuring compactness.

All major components of the propeller, excluding the bracket and blades, should be made of gray cast iron in contact with the liquid.ASTM A48 Class 35B,Or DIN 1691 GG25The surface is smooth, free of sand holes, blow holes, or other defects. The shell thickness should be sufficient to withstand water pressure and other loads.

All nuts, bolts, and washers AISI 316 Stainless Steel

The flow controller should be a machined surface on the critical contact area requiring a watertight seal, utilizing metal andMetal contact, with nitrile or fluorinated rubber O Formed rings, cannot be used for sealing applications requiring a certain torque to achieve tightness, and gaskets made of rubber, paper, or chemical compounds with a rectangular cross-section. Secondary sealing compounds, elliptical sealing rings, wool, or other devices are not to be used.

All cast iron surfaces on the external part of the streamer that come into contact with liquid should be coated with an epoxy resin for protection.

Flow controllers, accessories, and cables should be capable of continuous immersion at great depths. 20 The rice is submerged underwater.Will not lose its watertightness.

（2）Propeller

Propellers should be capable of handling regular sewage. All propellers are hydraulically balanced, non-tangled, and self-cleaning in design. Propellers should be carefully machined and surface treated. Propellers efficiently transfer the motor's output power for mixing and propelling the flow of sewage at the pool bottom.

The propeller should have two to three blades. All blades should be of the same design, featuring a swept-back configuration, low RPM, and low energy consumption, with even spacing between them.

The blades must be fully cast with reinforced polyurethane using spheroidal cast iron ribs. The blades should possess“FlexibleAnd can absorb changes in hydraulic load. Metal blades are not accepted due to their lack of elasticity. Each blade is mounted with a cast iron shaft in a socket on the side of the wheel housing. The wheel housing is secured to the shaft with a single key bolt.Ends, sealed with protective caps and should use a locking washer system.The propeller has passed dynamic balance testing.

（3）Gearbox

The pump must be driven by a planetary gearbox. The gearbox housing and the pump housing should be integrated into one unit, forming a streamlined cone shape. The surface should transition smoothly with the hub and motor housing to ensure high stability and excellent hydraulic characteristics, thereby enhancing the overall efficiency of the pump. The gearbox should be equipped with high-precision, high-efficiency, and low-load bipolar planetary gears, with gear teeth made of high-wear-resistant alloy steel. The gearbox should be filled with oil for lubrication and cooling, and to minimize the impact of leakage.

The gear box should be manufactured by an internationally renowned transmission specialist. The design service life should not be less than 100,000 hours.

（4）Axle

The motor shaft and propeller shaft are connected via a gearbox, the shaft is made of wear-resistant stainless steel, and both the propeller shaft and motor shaft can withstand all axial and radial loads. The propeller shaft is fully protected by mechanical seals and radial seals, isolated from liquids.

（5）Bearings

The propeller motor shaft should rotate on two ball bearings, with the propeller shaft supported by two cone roller bearings. All bearings are high-quality, maintenance-free, grease-lubricated bearings capable of withstanding axial and radial loads.

Bearings are 0.5Qn< Qn<1.25 Qn Operation within range（ Qn For optimal operating conditions）BearingsService life should be 100,000 Over 40 hours.

（6）Motor

The submersible motor should be a three-phase squirrel-cage induction motor. The motor's protection rating is IEC IP68 ratingInsulation grade: F Grade155°C. An appropriate rated power should be ensured to prevent the pusher from overheating during operation.Overload occurred. The motor should be capable of starting every hour. 20 The motor shaft and rotor have passed dynamic and static balance tests.

Motors should be designed for high Operating at 40℃ (104°F), it should be able to immerse and continuously stir a liquid at 40℃ without the average temperature rise of the stator winding exceeding 80℃.

Motors and cables must be capable of operating in high 20 Maintains its waterproof properties after continuous use in deep water.Combine IP68 Ingress Protection Rating

Submersible motors should be sufficiently cooled by the surrounding agitating medium and should not rely on cooling jackets or external cooling.However, the system should be insulated. Moreover, the motor room should be filled with insulating oil to ensure excellent insulation and cooling properties.Prevent leakage from damaging the motor.

To monitor the temperature on each phase winding, a thermosensitive switch should be installed in each phase stator winding coil. Thermosensitive switch set temperature for activation: 130°C, and connect to the control cabinet, interfacing with the control relay.

（7）Mechanical Seal

A mechanical seal and two radial seal rings should be fitted between the gear box and propeller of the flowmeter. The radial seal rings are placed on bronze sleeves, providing additional protection to the mechanical seal, and should be easy to replace. The shaft seal system should include a sealing oil chamber, with the mechanical seal operating within this chamber. A pair of radial seal rings should also be installed between the motor room and the gear box.

The mechanical seal should be maintenance-free and capable of rotating clockwise or counterclockwise without affecting or losing its sealing function. The mechanical seal is made of silicon carbide, which boasts excellent mechanical strength and resistance to thermal shock. The pH range of the medium should be 4 to 10.

The design service life of the mechanical seal should be greater than 25,000 hours.

（8）Cables and cable seals

The motor should be equipped with a submersible cable, which should be a single cable containing both control and power cores. The cable shouldEquipped with a separate and reliable cable import. The cable dimensions should comply with: IEC Standard with sufficient length for connection to junction boxes or on-site control cabinets without splicing. The cable connection to the junction room should be sealed with reusable double-track compression rubber sleeves; sealing with epoxy, silicone resin, or other secondary sealing systems is not allowed. Cable replacement should be ensured. The cable outlet is axially aligned and tightly abuts the outer surface of the motor housing.Arrangement, securing the cables with cable clamps and tensioned steel cables to prevent them from swaying due to water flow impacts, and to ensure they do not snag during lifting.

（9）Motor Protection

Temperature Sensor: All impellers are equipped with three-phase stator coils 3 Thermistor, only in series

（PTC）Thermally sensitive protection should be used to monitor the stator temperature rise. 130Action at °C, activate alarm deviceStop the motor.

Leakage Sensors: All pumps should be equipped with a leakage sensor to detect any leaks within the motor, preventing water from entering and causing damage. The leakage sensor should be an electrode type, with the signal capable of being monitored and triggering an alarm when water intrusion is detected.

The flow regulator protection relay should accept the alarm signal from the leakage sensor, and output a fault trip contact to automatically disconnect the motor power and stop the motor. The flow regulator protection relay is installed inside the local control box.The power requirement is AC220V. The protective relay should be provided with the pusher.

Jiangsu Du'an Environmental Protection QJB Submersible Turbulence GeneratorKey Components

（1) Fully assembled submersible propeller

（2) Accompanying diving motor;

（3) Complete installation system (guides, brackets, cable tensioners, etc.)

（4) A set of lifting equipment (including portable lifting brackets, lifting pulleys, stainless steel lifting chains, and hooks, etc.).

（5) Submersible cable for each streamer.

（6) Flowmeter protective components include leakage protection, temperature protection, and protective controllers, etc.

（7) All connecting accessories, all fasteners for installation (including stainless steel anchor bolts, nuts, washers, etc.).

（8) Two-year warranty period for spare parts and accessoriesStandbyTools.