Contact us

phone:+86 153 1226 1613
WhatsApp:+86 153 1226 1613

E-mail:celia@kynspump.com
WeChat:pump1668

Jiangsu Province, Wuxi City, China

Harmonious cooperation from now on！

Please try your hight to express your requirements, so that we can better develop a solution that meets your needs! Looking forward to cooperating with you!

Comprehensive consulting for the pump’s entire service life

We provide professional consulting and effective support in all stages of your pump’s service life:

We supply high-quality Progressive Cavity Pump spare parts Replacement for Netzsch/Seepex/Mono pump ,Progressive Cavity Pump Stator,rotor,coupling rod, driving shaft, seals,and guarantee short delivery times.

We offer 24-hour helpline support.

We provide services in over 30 countries.

For your company and your Progressive Cavity pump this means:

Decreased life cycle costs

Long-term value preservation

Jiangsu Province, Wuxi City, China

celia@kynspump.com

kypump251013@gmail.com

WhatsApp:+86 153 1226 1613

Frequently Asked Question!

Why has the flow rate of Progressive Cavity pump decreased or become unstable?

Main Causes of Reduced or Unstable Flow Rate in Screw Pumps
1. Suction-side issues (most common): Air leakage or blockage in the suction pipeline, clogged inlet filter; excessive suction lift, medium viscosity exceeding the standard, leading to insufficient suction and cavitation, sudden drop or fluctuation in flow rate.
2. Mechanical wear failures: Stator aging/wear, rotor wear, increased fit clearance between the two, more medium backflow, flow attenuation and instability; coupling offset, bearing damage, eccentric transmission, flow fluctuation.
3. Changes in medium properties: Sudden increase in medium viscosity (poor fluidity), large amount of bubbles/impurities, or abnormal temperature (affecting viscosity), resulting in decreased transportation efficiency and unstable flow rate.
4. Parameter/component abnormalities: Low rotation speed (insufficient motor speed, frequency conversion failure), flow rate decreasing synchronously with rotation speed; stuck or internal leakage of safety valve, partial medium backflow, reduced and fluctuating flow rate.
5. Improper installation/operation: Incomplete exhaust of the pump body, residual air causing air binding; inclined installation, pipeline resonance, affecting stable medium transportation and flow fluctuation.

What are the reasons for liquid leakage during the operation of Progressive Cavity Pump?

1. Seal failure: Shaft seals and O-rings aging/wearing/misaligned installation, seal face leakage, most common.
2. Loose flanges/joints: Undertightened bolts on pipelines and pump flanges, damaged gaskets, leakage at interfaces.
3. Pump body/component damage: Stator cracking, pump casing cracks, excessive rotor wear, medium seeping from damaged parts.
4. Improper assembly: Inadequate cleaning of seal faces, gasket misalignment, or abnormal fit clearance leading to leakage.
5. Excessive pressure: Outlet pressure too high, exceeding seal bearing capacity, forcing medium to leak.

What are the reasons for abnormal noises during the operation of the screw pump?

1. Insufficient suction/cavitation: Excessive suction lift, blocked inlet, air leakage, air entering the pump, causing idling noise.
2. Mechanical wear/eccentricity: Rotor and stator wear, bearing damage, coupling offset, friction noise during operation.
3. Medium with impurities: Hard objects enter the pump chamber, hit rotor/stator, producing impact noise.
4. Installation deviation: Poor coaxiality between pump and motor, unstable fixation, vibration noise during operation.
5. Insufficient lubrication: Lack of oil in bearings and transmission parts, dry friction causing sharp noise.

What are the reasons for the absence of liquid output from the screw pump?

Wrong rotation direction; Problems with suction pipe; Excessively high medium viscosity; Damaged rotor, stator or transmission parts; Foreign matter blockage in the pump
Solutions: Adjust rotation direction; Check for leakage and open inlet/outlet valves; Dilute the liquid; Inspect and replace damaged parts, remove foreign matter

What could be the reason for the new replacement screw pump not functioning?

Too tight fit between rotor and stator; Too low voltage; Excessively high medium viscosity
Solutions: Rotate the pump several times with tools and manpower; Adjust voltage; Dilute the liquid

What are the causes of insufficient pressure in a Progressive Cavity Pump?

Wear of rotor and stator
Solution: Replace rotor and stator

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Harmonious cooperation from now on！

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