Constant Head Permeameter Manufacturer,Supplier and Exporter in India
Product Code : TVT-STE-10584
The Constant Head Permeameter is used to determine the coefficient of permeability of granular soils such as sands and gravels, where water flows through the specimen readily enough to sustain a steady-state flow condition.
How It Works
The soil specimen is contained within a transparent permeability cell mounted on a detachable aluminium top and base plate, with pressure take-off points at different levels along the cell connected to a manometer board and to a constant-level supply tank. Water is passed through the specimen under a constant head difference, and once steady-state flow is established, the flow rate and the head loss between manometer points are used to calculate the coefficient of permeability directly from Darcy's Law. Tvet Equipments offers the cell in two diameters to suit different specimen sizes.
Technical Specifications
| Parameter | Specification |
|---|---|
| Item | Permeability cell |
| Nominal Cell Internal Diameter | 75 mm (114 mm variant also available) |
| Take-Off Points | 3 |
| Cell Wall | Transparent acrylic |
| Top & End Plate | Alloy aluminium |
Applications
The constant head test is the standard laboratory method for permeability of granular, free-draining soils, governed by ASTM D2434: Standard Test Method for Permeability of Granular Soils (Constant Head) and IS 2720 (Part 17): Laboratory Determination of Permeability. Permeability values from this test feed into seepage, drainage and filter design for embankments, dams and drainage layers.
Related Products & Category
This machine is part of the Soil Testing Equipment range at Tvet Equipments. Related machines include: Falling Head Permeameters.
Frequently Asked Questions
When is the constant head method used rather than falling head?
The constant head method is used for granular soils such as sands and gravels, which are permeable enough to sustain a steady flow rate; finer soils are generally tested using the falling head method.
What do the multiple take-off points allow?
Three take-off points at different levels allow the head loss over a known length of specimen to be measured directly via the manometer, improving the accuracy of the permeability calculation.
Why is the cell made of transparent acrylic?
A transparent cell wall lets the operator visually check for uniform saturation, air bubbles and any signs of piping or disturbance during the test.
Request a Quote
Looking to buy or get pricing for this machine? Request a quote from Tvet Equipments and our team will get back to you with indicative pricing and lead times.
