| | | The hydraulic and process fluids pass through carefully engineered holes in the contour plates in order to come into contact with the diaphragm. Relief and refill valves control the volume of hydraulic fluid. An automatic air bleed valve continuously purges air from the hydraulic fluid. The diaphragm style pump is sealed. It therefore is an excellent choice for hazardous, toxic, or corrosive chemicals. For extra protection, double diaphragm and leak detection modifications are available, although they are consid- | | ered redundant since this design is extremely durable. Because the process fluid must pass through relatively small holes in the contour plate, the disc diaphragm liquid end is not the best choice for slurries. With the exception of the mRoy P design, disc diaphragms are usually not the best choice when pumping viscous fluids. The disc diaphragm is capable of handling fluids where the required injection pressure is 3500psi or greater and the fluid temperature exceeds 250oF. | | |
| | | Available on: mRoy A, mRoy B, Milroyal B, Milroyal C Standard Materials of Construction: 316 SS, Alloy 20, Plastic | | |