Can operate only wherever negative suction exists
The suction lift poses a limitation in the installation
Can be suitable for only those liquids where external priming is feasible
Not recommended for high temperature application or inflammable organic liquids
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Horizontal Back Pull Out Pumps
Vertical Glandless Pumps
Hydrodynamic Seal Pump
Verticle Sump Pumps
Cantilever Shaft Verticle Pumps
Cantilever Shaft Verticle Pumps


Process Pumps (I) Pvt Ltd.
86, III Phase,
Peenya Industrial Area,
Karnataka, India

Phone :
+91 80 28395327 /
+91 80 28395328
Fax :
+91 80 28395807
Email : 

Vertical Glandless Pumps are machines designed for continuous and maintenance free operation. We offer these pumps in Metallic and Non Metallic materials

Uniqueness of Vertical Glandless Pumps

  • Designed for continuous operation
  • Problems associated with mechanical seal or gland is eliminated
  • No bearing housing
  • Self draining
  • Suitable for clear liquids and slurries
  • Zero safe minimum flow
  • Can operate pump safely form fully open to fully closed condition
  • Pump can run dry indefinitely
  • Saves valuable floor space

When to Choose a Vertical Glandless Pump ?

  • Where ever negative suction exist (pump is mounted above the level of the suction tank).
  • Height of the suction tank is less than 5 meters
  • Priming of the pump is feasible
  • Ideally suited for water based inorganic chemicals like acids, alkalis, salt solutions and its slurries
  • Continuous operation like scrubbing
  • Recirculation or continuous fluid flow  like pickling, plating etc.,
  • Ideally suited for ETP Application

Principle of Vertical Glandless Pump

The Vertical Glandless Pumps in normal hydraulic terms do not differ from any conventional centrifugal pump. The pump is designed in such a way that the liquid would normally try to pass through annular space , where the impeller drive shaft enters the back plate (stuffing box).This liquid is diverted and returns as a controlled flow to the suction tank. The need for any seal is eliminated by allowing the leakage liquid to escape through the overflow connection to the overflow chamber.

The liquid entering the suction flows around the impeller casing and leaves through the delivery under pressure. Between the annular gap of the upper rotor casing and impeller some leakage liquid escapes to the overflow chamber. The auxiliary impeller (Expeller) prevents the leakage liquid going further up and channelizes it through outlet in the overflow chamber.

These pumps are ideally suited for continuous operation for clear liquid and slurries. This pump is at its best with negative suction.

Vertical Glandless Pumps

Technical Specifications
  • Offered in more than 45 different standard & hybrid models
  • Head up to 60 MLC
  • Capacity 3m³/hr to 800 m³/hr
  • Operates at the temperature range of 20° C to 80° C
  • Offered in Semi open and Closed impeller to suit the application.
  • Offered in both 1440 & 2900 RPM.

Range of Material offered
  • Stainless Steel of Various Grades
  • Hi Silicon Iron
  • Alloy-20
  • CD 4MCu
  • Hastelloy B, C
  • Monel
  • Ni resist
  • Aluminium bronze
  • and many more

Limitations of Vertical Glandness Pump

  • Can operate only wherever negative suction exists or can be created
  • The suction lift poses a limitation in the installation ( where NPSH available is less than 3 meters)
  • Can be suitable for only those liquids where priming is feasible
  • Not recommended for high temperature application
  • Not recommended for inflammable organic liquids
  • Not recommended for acids like strong sulphuric acid or oleium where priming is not feasible

Typical Application of Vertical Glandless Pump

  • Vertical Glandless Pump finds its application in all types of Process Industries like:-
    1. Chemical
    2. Petrochemical
    3. Pharmaceutical
    4. Fertilizer
    5. Food Processing
    6. Mechanical Engineering Industries.
  • Handling liquid for surface coating/finishing operation as well as in ETP.
  • Ideally suited for continuous operation like scrubbing where the processing operation may result in crystal formation or variation of temperature.
  • Recommended for application like metal cleaning, re-circulation and pickling.

The Pump can be installed in any of the following schemes

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