Van Veen Grab


Description


The stainless steel Van Veen grabs are used for taking disturbed samples from the bottom of lakes, rivers, etc. with maximum sample depth of >30 meters, Various designs can be supplied. The smaller designs are manually controlled.

The mode of operation of all Van Veen grabs is the same. At the surface the jaws are pushed open and kept in that position by a hook. To keep the hook in the right position the Van Veen grab should be sunk at a steady, not too high, pace.

Both jaws are fitted with holes to allow air to escape during the sinking. If these holes were not there, the air would escape when taking the sample, which would result in interference with the sample.

As soon as the jaws touch the bottom, the hook loosens its grip, so that, when hoisting the rope again the jaws will shut tight because of the leverage by the rods. The amount of drawn sample mainly depends on the compactness of the bottom. A heavier grab catches more than a lighter one. Therefore all models have been fitted with weighting blocks. Moreover, when a strong current prevails, the cable of the heavier grab deviates less from the vertical than the lighter one.

Specifications:

Maximum sample depth

> 30 m

Product material

stainless steel

Rod or cable operated

cable

Sample specification

disturbed

Sample volume

0.5 liter

Package size

30 x 16 x 13 cm

Weight

2.12 kg