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SNHG Series
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SNHG Series

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SNHG Series
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Features
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Construction
Application

● Product introduction

➢ SNHG type and SZH9400 type three screw pump is a new type of high efficiency and energy saving three screw pump which is developed on the basis of introducing the technology of German Allweiler company. Applicable to oil field, petrochemical and other industries long distance and large flow transmission of all kinds of oil products. Compared with the widely used multi stage centrifugal pump or AY oil pump, the efficiency is increased by 20% - 30%, which has a very considerable economic benefit.

➢ SNHG type three screw pump, flow range of 300-450m3/h,

➢ pressure up to 4.5Mpa.

➢ Material combination: pump body: welded assembly bushing: ZCuSn10P1 main rod: 38CrMoAl from rod: 38CrMoAl

● Features

➢ Horizontal, single suction, anchor installation, hydraulic balance valve is equipped with a safety device.

➢ high efficiency and energy saving: more than 80% efficiency.

➢ long life.

➢ With self absorption capacity, without bottom valve.

➢ smooth flow, no pulsation, low noise.

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● Construction

➢ Three internal screw pump is mainly composed of an active screw, two driven screw and three screw rod containing the sealing chamber. The liquid in the cavity is axially moved along with the rotation of the screw so as to reach the purpose of conveying the liquid.

● Structure principle diagram

➢ The special structure of the pump ensures that the main rod is not affected by radial force. Axial force using hydraulic balance, bearing only bear the weight of the screw and a small residual axial force, from the pole into the balance, the balance of the balance of the role of the balance of the axial force, but also for the use of sliding bearing. Screw geometry and size to ensure that the main rod to the rod does not transfer torque from the rod is the pressure of the transfer of liquid and rotation, thereby ensuring that the three screw pump has a long service life, and a higher mechanical efficiency. Perfect design and processing technology and equipment protection, so that the sealing chamber completely separated, so that it has a high volume efficiency. The above characteristics determine that the series of pumps to achieve a high efficiency.

● SNHG7400、9400 Structure principle diagram

● SNHG5300 Structure principle diagram

1: pump body 2: bushing 3: main rod 4: from the rod  5: balance sleeve 6; bearing 7: mechanical seal

● Use and maintenance

➢ before installation, to ensure that the import and export pipeline clean, smooth, no welding slag and other foreign bodies exist.

➢ pump in the first use or long-term shutdown, before the start, the pump should be injected into the transmission medium.

➢ before starting, the import and export valve is fully opened. Close the outlet valve after shutdown.

 Warning: never open the valve after the valve is closed down or start first.

➢ move to start, to ensure that the motor rotation direction is correct, and then start the pump.

➢ before the factory or after the commissioning of the site, if no special circumstances, shall not be allowed to adjust.

➢ bearing, should be regularly injected into the lubricating oil.

 Note: the pump reaches the user's hands, it is recommended not to dismantle the inspection.

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