Based on your applications, receive your end product and a detailed confidential report from our experienced technicians at our Pulva Testing Lab. This complete analysis indicates which Pulva grinding technologies process your materials most efficiently. Just complete the evaluation request form below.

Instruction for Material Submission

  1. You will need to send a minimum of 1 cubic foot of material.
  2. Test material must be accompanied by all associated MSDS Safety Data Sheets.
  3. Test must also be accompanied by the Evaluation Request form filled out in full.

  4. Submit to:
    Pulva Corporation
    105 Industrial Drive West
    Valencia, PA 16059


  • A Minimum of 1 cubic foot of material is required for testing.
  • Customer is responsible for all shipping costs


The information you will need to complete the Printable Evaluation Request:

  1. Name of Material
    If material is a new product or generally unknown, we would need information regarding its physical characteristics.
  2. Size of Feed
    The hardness of the feed lumps will determine what maximum size can be fed to Pulva-Sizer® without pre-crushing. Also the size and type of mill is a factor.
  3. Fineness of finished product - ideal and acceptable
    On fine powders, a mesh fineness specification such as 95% through 200 mesh is usually sufficient. On some materials capacity may double when grinding to 95% through compared to 99.5% through.
  4. Capacity in pounds per hour - min. and max.
    Giving minimum and maximum capacity permits us to select proper size Pulva-Sizer® and motor.
  5. Abrasive, as sand, flint, etc.
    Because the wear on the hammers, screens and liners increases very rapidly as the rotor speed is increased, a semi- or partially-abrasive material may be practical on a relatively course grind with low rotor speed but the wear would be excessively high on an ultra fine grind where highest rotor speed would be required. With a five pound sample we can check the degree of abrasiveness of any material and usually determine amount or rate of wear to be expected.
  6. Heat sensitive - softening temperature
    Most of the energy or power put in to the material to reduce its particle size is converted to heat. Therefore, on materials having low softening points or which are heat sensitive, it may be necessary to provide suitable means to remove the excess heat from the grinding chamber by using larger volume of air or chilled air.
  7. Moisture or Oil content
    Although the Pulva-Sizer® is recommended for both dry and wet grinding, there is a point between where many materials attain a plastic or sticky consistency due to high water or oil content.
  8. Blending or dispersing desired
    If the feed material consists of two or more products, such products must be premixed first.
  9. Additional pertinent data
    On material having unusual characteristics the customer can generally supplement the information required above with a description of the distinctive difference peculiar to the product.
  10. Test grinding
    When a test grinding is indicated the above information is essential for us to intelligently conduct the test. The amount of material to be sent depends largely on ultimate capacity required and size of Pulva-Sizer® used to make the test




To help us spec the right equipment for your needs.