Logo Schmitt Kreiselpumpen GmbH, Ettlingen
chemical resistant pumps for corrosive and highly pure media
Contact Adviser


Do you have any questions regarding our products? We will be glad to assist you. Our technical hotline can be reached at the following hours: 
Monday through Thursday  8.00 am to 5.00pm
Friday 8.00 am to 3.30 pm

Tel: +49 7243 - 54 53 13

from within Germany: 07243 - 54 53 13
E-mail: sales@schmitt-pumpen.de

Montag bis Donnerstag 8.00 Uhr bis 17.00 Uhr


Self-priming centrifugal pump: S series

  • Self-priming centrifugal pumps with a single mechanical seal
  • Materials:
    • Housing: PP (polypropylene) or PVC (polyvinylchloride)
    • Other parts: PVDF (polyvinylidene fluoride) 
  • Non-slip torque transfer
  • Liquid level up to 5 m below the pump
  • Max. output rate: 200 l/min
  • Max. discharge head: 27 m
  • Suction head: up to 5m max.
  • Motor power: 0.25 - 2.2 kW 


The S Pump Series has a special pump housing with a collection container that serves as a liquid reservoir. After filling the liquid container, the pump creates a strong negative pressure and is so enabled to independently prime the medium. In the S Pump Series, the motor power is transmitted without slip directly to the pump impeller through a solid shaft. A mechanical seal prevents the leakage of the media to be pumped and ensures the leak proof sealing of the centrifugal pump.

Advantages of the S Pump Series:

  • self-priming, the liquid level can be up to 5 m below the pump
  • offers a high degree of operational safety
  • the highest chemical resistance 
  • robust, thick-walled design 
  • low-maintenance through an optimal adaptation to the medium to be pumped 
  • long-lasting and wear resistant, various types of designs for almost all operating conditions
  • models are also available, where no metal parts are in contact with the medium
  • easy to maintain (wear parts and the mechanical seal can be changed swiftly)
  • universally applicable, quiet and compact
  • various chemical resistant materials can be supplied from stocked inventory

The S Pump Series is especially conceived for the self-priming operation. Therefore, it is particularly suitable if frequent starts with an empty suction line are necessary or the penetration of gasses cannot be prevented. The design and manufacturing materials allow for optimized adaptability for the many different operating conditions as well as for the various media to be pumped

This results in application possibilities, amongst others, for the following application fields:

  • Sampling or the transmission out of containers
  • Pits or plants 
  • Transfusing operations
  • Environment engineering
  • Tanker trucks
  • Electro-plating technology 
  • Laboratory applications
  • everywhere, where the technical safety regulations do not allow the application of normal priming pumps


Materials and Components

  • Main material: Parts made solid of PVDF, PP or PVC
  • Medium temperature up to 50° C possible
  • Elastomere alternatively made of FKM, EPDM, FEP or Kalrez®
  • Shafts are made of stainless steel or Hastelloy C4
  • Mechanical seals made of PTFE, ceramic, carbon or SiC
  • Structure in the designs A, B and C: 
    • Design A: No metal parts in the pump are in contact with the medium. The impeller is equipped with a shaft sleeve. The face pressure is achieved with a thrust-collar-loaded mechanical seal. 
    • Design B: The mechanical seal is spring-loaded. The impeller is equipped with a shaft sleeve. The spring is made of Hastelloy and in contact with the medium; however, the shaft is not. 
    • Design C: The mechanical seal is spring-loaded. The impeller does not have a shaft sleeve. Simple, robust structure. 
  • The metal parts that are in contact with the medium (shaft sleeve, impeller insert and locking nut) are available in stainless steel or Hastelloy. 
  • High-quality electric motors made in Germany

Material Details

  • PVDF: Polyvinylidene Fluoride, Pure, milky white, not colored (up to +95° C)
  • PP: Polypropylene, Fiber glass-reinforced, gray (up to +80° C)
  • PVC: Polyvinyl chloride, dark gray (up to +50° C)
  • FKM: Viton® quality, -20...+200° C
  • EPDM: Ethylene propylene diene M-class rubber, food-safe (FDA, KTW, WRC), -40...+160° C
  • FEP: Fluorinated ethylene propylene with Viton® or silicone core, -60…+200° C
  • Kalrez®: Pure Teflon®, fiber glass or carbon fiber reinforced
  • PTFE:Pure Teflon®, fiber glass or carbon fiber reinforced
  • SiC: Silicon carbide, without free silicon, sintered
  • Carbon: Carbon, impregnated with synthetic resin, food-safe
  • Stainless Steel: 1.4571 (A4) 
  • Hastelloy C4: 2.4610
  • Ceramics: Highly pure Al2O3-ceramic 99.7%

Motor Details

  • Standard Motors (stock items):
    • Three-phase motors: 230/400 V 3ph, 50 Hz, IP 55, insulation-class F or 277/480 V 60 Hz also with PTC thermistor
    • Alternating current motors: 230 V 1ph, 50/60 Hz, IP 55, Insulation class F
  • Special design models (available):
    • Three-phase motors, explosion proof, flameproof enclosure, EEx de II CT4
    • Special voltages and frequencies
    • 2-, 4- and 8-pole
    • UL and CSA execution
    • Special protection types (e.g. IP 65)
    • High temperature designs
    • Special insulation classes (e.g. tropical insulations)
    • Multi area voltage (e.g. 220-290 / 380-500 V 50 Hz; 220-332 / 380-575 V 60 Hz.)
    • Additional designs upon request

Performance Data

Characteristics of the S 115 - S 170 Pump Series

S 115 - S 170 Pump Series

Max. output rate: 200 l/min

Max. discharge head: 27 m

Motor power: 0.25 - 2.20 kW



S 170: 2.20 kW

S 150: 1.10 kW

S 130: 0.55 kW

S 115: 0.25 kW


Download Leaflet and Operation Manual

Pump Selection Form