VSM 300 Secondary screens are designed to reduce the fluid content on solids discharged from the primary screens. These screens are normally used with oil based muds, but are equally suitable with water based muds if required. Additional fluid is recovered from the solids by the secondary screens in conjunction with the drying bar, allowing the solids to rotate on the mesh before being discharged.

Mesh Size	Opening (Micron)	Open Area (%)
84 x 84	215	49
40 x 80	465 x 148	34
105 x 105	165	45
145 x 145	125	51
165 x 165	104	45
180 x 180	91	42
200 x 200	87	47
230 x 230	75	46