Duwan Environmental WDS80-250 Horizontal Centrifugal Pump with Variable Frequency Motor

Motor 22 kW

Flow rate: 50 meters

Flow elevation of 80 meters

Variable frequency motor

Jiangsu Du'an Environmental ProtectionWDSHorizontalCentrifugal PumpComply with on-site operational requirements and usage conditions

DuwanWDSSingle-stage horizontal centrifugal pumpFlow HeadPlease refer to the electronic sample for power specifications.

Duwan Environmental Single-Stage CentrifugalPumps are designed for safety, reliability, practicality, and economy, meeting the requirements of safe, stable, long-term, and fully loaded operation for the equipment.

Duwan Environmental ProtectionWDSSingle-stage centrifugalPump Performance CurveInPumps at the rated operating point and as close as possible toQ～H Scope is extensive.WorkEfficiency.

WDSHorizontal centrifugal pipelinePumpPlease provide the Chinese content to be translated into American English.The pipeline and other equipment must not cause cavitation or overloading when combined. The pump unit can operate for extended periods near the specified flow and head operating points.

CentrifugalDuring shutdown, the pump impeller and other components should remain undamaged before the check valve closes. Vibration reduction measures for the unit should be considered to minimize vibrations and noise during operation and during start-up and shutdown.

WDSHorizontal Centrifugal PumpFlow continuously rising to the shut-off point-Flow curve, the head rise from the rated point to the closed point should be at least the head rise of the rated point5%For pumps operating in parallel, the head rise from the rated point to the fully closed point should be at least the head rise of the rated point.10%。

Horizontal CentrifugeThe shutdown head of the pump should be less than or equal to the rated head.120%。

Under the rated impeller, to ensure high efficiency and low vibration during operation, the pump's operating point should ideally be locatedGoodScope of WorkNormalEfficiency point traffic70%~120%The normal operating point flow of the pump should not exceedGoodEfficiency point flow, keep the normal operating point as close as possibleGoodEfficiency points, and should be kept as far away as possible.Please provide the Chinese content to be translated.Small flow point.

WDSSingle-stage horizontal centrifugalPump performance, including efficiency, flow rate, head, power consumption, and required NPSH (Net Positive Suction Head)Meet the field operational conditions requirements.

For generalWDSHorizontalCentrifugalEffective NPSH at rated point for pump(NPSH)a At least as much as the required NPSH (Net Positive Suction Head)(NPSH)rLarge0.6m。

Avoid selecting pumps that may cause vortex issues under specified operating conditions. When selecting a pump, consider the pump's suction specific speed.Proportional.

WDSThe single-stage horizontal end-suction pump features a rear-hinged door design. The shaft end seal requires a packaged mechanical seal. The primary seal (dynamic and static rings) should be made of high-strength, high-wear-resistant materials. The material, structure, and cooling flushing scheme of the mechanical seal should be rational and reliable.

Bearings are standard-type rolling bearings, utilizingNSKOrSKFBrandBasic rated life of roller bearingsNot less than the normal service lifeOperate continuously under rated conditions for at least25000 HourPlease provide the Chinese content to be translated.At rated speed under both radial and axial loads, at least16000 Hour(s).

Pump and drive motor transmission connections should be made using a coupling for direct connection, couplingHarvestUtilize couplings with extended hubs. The pump shaft possesses sufficient strength and rigidity to transmit the rated power of the prime mover; the surface roughness of the shaft and sleeve at the mechanical seal should not exceed0.8mThe shaft deflection shall not exceed during operation within the allowable range of the pump.50m。

A replaceable and firmly locked, non-rotating wear-resistant ring should be provided between the impeller and the pump housing to maintain the pump's performance.HighEfficient operation.PumpUtilizing mechanical seals, the leakage of the mechanical seal should not exceed5mL/h。

WDSSingle-stage horizontal centrifugalPump housing and cover, including the shaft seal box and sealing end cover, must not exceed the nominal pressure of the pump flange. The pump housing, including the shaft seal box and sealing end cover, features adequate wall thickness for sufficient structural integrity.NormalOperating TemperatureOperation.

Pressure gauge connections should be installed at both the inlet and outlet of the pump housing. An exhaust valve connection should be left at a higher position on the water pump outlet. Liquid discharge connections should be set at the lower part or several lower positions of the pump, and sealed with plugs.

The impeller is made of a single casting, with a structural design ensuring the high-efficiency pumping of flush water. ImpellerAvailableRigid fixation to prevent circumferential and axial movement during rotation in the prescribed direction.

There is a replaceable and firmly locked, non-rotating wear-resistant ring between the impeller and the pump housing to maintain the pump's performance.HighEfficient operation.WDSHorizontal CentrifugalThe shaft of the pump has sufficient strength and rigidity to transmit the rated power of the prime mover; the surface roughness of the shaft and sleeve at the mechanical seal should not exceed0.8m.Pumps operate within their allowable working range with shaft deflection.GenerallyNot to exceed50m。

If fitted with a sleeve, it should be securely fastened to prevent the sleeve from moving axially or circumferentially. The sleeve should be tightly adjacent to the impeller hub to maintain a seal and prevent the shaft from becoming wet. Additionally, it should ensure that the leakage between the shaft and sleeve is not confused with leakage passing through the mechanical seal face.

To prevent loss and contamination, the design of the bearing housing must not use gaskets and threaded joint surfaces to isolate lubricant from coolant. All openings in the bearing housing should be designed to prevent the entry of debris and leakage under normal operating conditions.

Nanjing Lan ShenWDSHorizontal CentrifugalThe pump is connected to the drive shaft with an elastic coupling, the size of which should be capable of transmitting the predetermined driving motor.Please provide the Chinese content to be translated into American English.High torque requirements. The coupling's maximum speed must match all possible operating speeds of the predetermined pump drive. The coupling should be equipped with a protective cover.

The base should be a common base for both the pump and motor, with a design that allows for vertical adjustment of the driving mechanism to compensate for the tolerances between the pump driving mechanism and the base.

At any operating point on the corresponding pump characteristic curve, the motor's rated output shaft power should be at least greater than the pump shaft power by15%The motor must be designed for continuous operation and must meet at least an hourly requirement of...10No startup requirements that cause any harmful effects. The motor is equipped with overheat and overcurrent protection devices.

WDSSingle-stage centrifugal pipelinePump rated parameters, allowable deviations, vibration intensity during normal operation, noise levels, etc., should all comply with the requirements of the standard specifications that the product adheres to. Distance from the pump1 Noise level less than 1m85dBVibration levels meetStandard Requirements。

WDSSingle-stage centrifugal pipelinePumps are painted and meet the quality standards of the Ministry of Electromechanical Industry; unpainted.WillDings, dents, bubbling, and hard surface scratches, etc., on the exteriorPhenomenon.Surface coating as specified.The equipment itselfStandard colors: Pump in silver white, motor in apple green, motor guard in yellow, motor guard with red directional marking, coupling guard in yellow.

WDSSingle-stage centrifugal pipelineThe pump rotates smoothly without any jamming or stalling. All exposed rotating parts are equipped with removable protective covers.

WDSSingle-stage centrifugal pipelinePump main materials：

Pump Housing:Cast IronOr equivalent

Impeller:Cast IronOr equivalent

Spindle:Cast IronOr equivalent

Wear-resistant lining:Cast IronOr equivalent

Axial Seal: Mechanical Seal

Manufacturing, inspection, testing, and acceptance

（1Each pump must pass inspection and testing, and be accompanied by a product certification and user manual before it can be shipped.

（2Material testing should include chemical composition tests, mechanical property tests, and non-destructive tests, etc.

（3The pump testing and inspection include:

a.Hydrostatic Test

Pressure-bearing parts(Pump bodies, pump covers, and sealing end caps, including fasteners)The test pressure should be equal to the basic design pressure.1.5 Double the hydrostatic test pressure. The test should be conducted using cold, clean water, with the pressure maintained for a minimum of10 Minute, no visible leakage.

b.Performance Test

·Hydraulic Testing &NPSH Tests should be conducted according toJB3562 Standard procedures

·Vibration test as perJB/TQ380 Standard Process

·Noise test as perJB/TQ381 Standard procedures

·Monitor bearing temperature<80℃

·Leakage Test of Sealed Containers

c.Inspect

·Inspection of Components Before Assembly

·After test operation, internal inspection of the pump housing and sealing ring

·Inspection of installation dimensions

·Inspection of auxiliary piping and other accessories

·Complete unit appearance inspection(Including label data, surface paint, packing list, random documents, and accessories.) ·Operational Status Inspection(Including steering)