Medium Pressure Biofilm Devices

Medium Pressure Biofilm Device (MPMR-series)

Within the mid-pressure series there are two basic manifold designs. The first is a heavy-walled tube of circular cross-section with ports positioned radially and inlet and outlet ports at either end. The standard bore for this configuration is 2.5 cm with lengths ranging from 30cm (6 sampling ports positioned at 0° and 180°, each capable of holding a single removable coupon with a surface area of 100 mm˛) to 150 cm (32 sampling ports positioned at 0°, 90°, 180° and 240°). Typically machined from PVC, the system is intended for high-flow applications at pressures below 60 psi (400 kPa).

The second design class in the mid-pressure series offers the same coupon size and material considerations, but is a monolithic block with linear or serpentine sampling port arrays in a uniform rectangular channel cross section. These are often designed specifically for industrial applications where space constraints are a consideration.

Large Area Medium Pressure Biofilm Device (MPCR-25)

In most instances coupons of large surface area are best accommodated by a cassette-type manifold, although special designs can be made to permit their use in multiple port-type systems such as the standard tubular and monolithic MPMR-series devices. Cassettes are locked in place in the manifold with thumbscrews against hollow-bore silicone O-rings. The standard channel configuration is of rectangular cross section in either linear or serpentine arrays. Typically machined from acrylic or PVC, the MPCR-25 contains 5 flat cassettes, each of which holds 5 coupons. The surface area of each coupon is 285 mm˛ and the maximum rated pressure of this device is 40 psi (275 kPa).